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variations</title> <meta name="description" content="Search results for: multiple variations"> <meta name="keywords" content="multiple variations"> <meta name="viewport" content="width=device-width, initial-scale=1, minimum-scale=1, maximum-scale=1, user-scalable=no"> <meta charset="utf-8"> <link href="https://cdn.waset.org/favicon.ico" type="image/x-icon" rel="shortcut icon"> <link href="https://cdn.waset.org/static/plugins/bootstrap-4.2.1/css/bootstrap.min.css" rel="stylesheet"> <link href="https://cdn.waset.org/static/plugins/fontawesome/css/all.min.css" rel="stylesheet"> <link href="https://cdn.waset.org/static/css/site.css?v=150220211555" rel="stylesheet"> </head> <body> <header> <div class="container"> <nav class="navbar navbar-expand-lg navbar-light"> <a class="navbar-brand" href="https://waset.org"> <img src="https://cdn.waset.org/static/images/wasetc.png" alt="Open Science Research Excellence" title="Open Science Research Excellence" /> </a> <button class="d-block d-lg-none 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action="https://publications.waset.org/abstracts/search"> <div id="custom-search-input"> <div class="input-group"> <i class="fas fa-search"></i> <input type="text" class="search-query" name="q" placeholder="Author, Title, Abstract, Keywords" value="multiple variations"> <input type="submit" class="btn_search" value="Search"> </div> </div> </form> </div> </div> <div class="row mt-3"> <div class="col-sm-3"> <div class="card"> <div class="card-body"><strong>Commenced</strong> in January 2007</div> </div> </div> <div class="col-sm-3"> <div class="card"> <div class="card-body"><strong>Frequency:</strong> Monthly</div> </div> </div> <div class="col-sm-3"> <div class="card"> <div class="card-body"><strong>Edition:</strong> International</div> </div> </div> <div class="col-sm-3"> <div class="card"> <div class="card-body"><strong>Paper Count:</strong> 6172</div> </div> </div> </div> <h1 class="mt-3 mb-3 text-center" style="font-size:1.6rem;">Search results for: multiple variations</h1> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">6172</span> Multiple Variations of the Nerves of Gluteal Region and Their Clinical Implications, a Case Report</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=A.%20M.%20Prasad">A. M. Prasad</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Knowledge of variations of nerves of gluteal region is important for clinicians administering intramuscular injections, for orthopedic surgeons dealing with the hip surgeries, possibly for physiotherapists managing the painful conditions and paralysis of this region. Herein, we report multiple variations of the nerves of gluteal region. In the current case, the sciatic nerve was absent. The common peroneal and tibial nerves arose from sacral plexus and reached the gluteal region through greater sciatic foramen above and below piriformis respectively. The common peroneal nerve gave a muscular branch to the gluteus maximus. The inferior gluteal nerve and posterior cutaneous nerve of the thigh arose from a common trunk. The common trunk was formed by three roots. Upper and middle roots arose from sacral plexus and entered gluteal region through greater sciatic foramen respectively above and below piriformis. The lower root arose from the pudendal nerve and joined the common trunk. These variations were seen in the right gluteal region of an adult male cadaver aged approximately 70 years. Innervation of gluteus maximus by common peroneal nerve and presence of a common trunk of inferior gluteal nerve and posterior cutaneous nerve of the thigh make this case unique. The variant nerves may be subjected to iatrogenic injuries during surgical approach to the hip. They may also get compressed if there is a hypertrophy of the piriformis syndrome. Hence, the knowledge of these variations is of importance to clinicians, orthopedic surgeons and possibly for physiotherapists. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=gluteal%20region" title="gluteal region">gluteal region</a>, <a href="https://publications.waset.org/abstracts/search?q=multiple%20variations" title=" multiple variations"> multiple variations</a>, <a href="https://publications.waset.org/abstracts/search?q=nerve%20injury" title=" nerve injury"> nerve injury</a>, <a href="https://publications.waset.org/abstracts/search?q=sciatic%20nerve" title=" sciatic nerve"> sciatic nerve</a> </p> <a href="https://publications.waset.org/abstracts/30346/multiple-variations-of-the-nerves-of-gluteal-region-and-their-clinical-implications-a-case-report" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/30346.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">343</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">6171</span> Abnormal Branching Pattern of Lumbar Plexus in an Adult Male Cadaver: A Case Report</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Deepthinath%20Reghunathan">Deepthinath Reghunathan</a>, <a href="https://publications.waset.org/abstracts/search?q=Satheesha%20Nayak"> Satheesha Nayak</a>, <a href="https://publications.waset.org/abstracts/search?q=Sudarshan%20S."> Sudarshan S.</a>, <a href="https://publications.waset.org/abstracts/search?q=Prasad%20Alathady%20Maloor"> Prasad Alathady Maloor</a>, <a href="https://publications.waset.org/abstracts/search?q=Prakash%20Shetty"> Prakash Shetty</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Lumbar plexus is formed by the union of ventral rami of T12, L1, L2, L3 spinal nerves and the larger upper division of L4 lumbar spinal nerves. Variations in the normal anatomy of the lumbar and sacral plexus might be seen in some cases and are reported in the literature, but finding such an unusual case comprising of multiple variations which is normally not expected in a clinical setup, proves to be a vital piece of information for clinicians and medical practitioners. During the dissection of the abdomen and pelvis of an approximately 70 year old cadaver, we observed the following variations in the formation of the lumbar and sacral nerves. 1. The genitofemoral nerve bifurcated at a higher level; genital branch of genitofemoral nerve gave branches to the anterior abdominal wall muscles, 2. A communicating branch was given from the lateral cutaneous nerve of thigh to the medial cutaneous nerve of thigh, 3. A muscular branch was given from femoral nerve to psoas major, 4. There was absence of contribution of L4 spinal nerve in the formation of the lumbosacral trunk and 5. Lumbosacral trunk gave communicating branches to the femoral and obturator nerves. Most of the variations found were rare and finding all the above said variations in a single cadaver is even rare. Documentation of such rare cases with multiple variations in the formation of nerves from the lumbar plexus provides vital information on such occurrences. This information would in turn improve the knowledge of clinicians and surgeons dealing with this region. Emphasizing such knowledge of this region would prevent accidental damage to the structures with a variant anatomy. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=femoral%20nerve" title="femoral nerve">femoral nerve</a>, <a href="https://publications.waset.org/abstracts/search?q=genitofemoral%20nerve" title=" genitofemoral nerve"> genitofemoral nerve</a>, <a href="https://publications.waset.org/abstracts/search?q=lumbar%20plexus" title=" lumbar plexus"> lumbar plexus</a>, <a href="https://publications.waset.org/abstracts/search?q=lumbosacral%20trunk" title=" lumbosacral trunk"> lumbosacral trunk</a> </p> <a href="https://publications.waset.org/abstracts/73174/abnormal-branching-pattern-of-lumbar-plexus-in-an-adult-male-cadaver-a-case-report" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/73174.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">288</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">6170</span> A Statistical Analysis on Relationship between Temperature Variations with Latitude and Altitude regarding Total Amount of Atmospheric Carbon Dioxide in Iran</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Masoumeh%20Moghbel">Masoumeh Moghbel</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Nowadays, carbon dioxide which is produced by human activities is considered as the main effective factor in the global warming occurrence. Regarding to the role of CO2 and its ability in trapping the heat, the main objective of this research is study the effect of atmospheric CO2 (which is recorded in Manaloa) on variations of temperature parameters (daily mean temperature, minimum temperature and maximum temperature) in 5 meteorological stations in Iran which were selected according to the latitude and altitude in 40 years statistical period. Firstly, the trend of temperature parameters was studied by Regression and none-graphical Man-Kendal methods. Then, relation between temperature variations and CO2 were studied by Correlation technique. Also, the impact of CO2 amount on temperature in different atmospheric levels (850 and 500 hpa) was analyzed. The results illustrated that correlation coefficient between temperature variations and CO2 in low latitudes and high altitudes is more significant rather than other regions. it is important to note that altitude as the one of the main geographic factor has limitation in affecting the temperature variations, so that correlation coefficient between these two parameters in 850 hpa (r=0.86) is more significant than 500 hpa (r = 0.62). <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=altitude" title="altitude">altitude</a>, <a href="https://publications.waset.org/abstracts/search?q=atmospheric%20carbon%20dioxide" title=" atmospheric carbon dioxide"> atmospheric carbon dioxide</a>, <a href="https://publications.waset.org/abstracts/search?q=latitude" title=" latitude"> latitude</a>, <a href="https://publications.waset.org/abstracts/search?q=temperature%20variations" title=" temperature variations"> temperature variations</a> </p> <a href="https://publications.waset.org/abstracts/34560/a-statistical-analysis-on-relationship-between-temperature-variations-with-latitude-and-altitude-regarding-total-amount-of-atmospheric-carbon-dioxide-in-iran" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/34560.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">408</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">6169</span> Improved Accuracy of Ratio Multiple Valuation</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Julianto%20Agung%20Saputro">Julianto Agung Saputro</a>, <a href="https://publications.waset.org/abstracts/search?q=Jogiyanto%20Hartono"> Jogiyanto Hartono</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Multiple valuation is widely used by investors and practitioners but its accuracy is questionable. Multiple valuation inaccuracies are due to the unreliability of information used in valuation, inaccuracies comparison group selection, and use of individual multiple values. This study investigated the accuracy of valuation to examine factors that can increase the accuracy of the valuation of multiple ratios, that are discretionary accruals, the comparison group, and the composite of multiple valuation. These results indicate that multiple value adjustment method with discretionary accruals provides better accuracy, the industry comparator group method combined with the size and growth of companies also provide better accuracy. Composite of individual multiple valuation gives the best accuracy. If all of these factors combined, the accuracy of valuation of multiple ratios will give the best results. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=multiple" title="multiple">multiple</a>, <a href="https://publications.waset.org/abstracts/search?q=valuation" title=" valuation"> valuation</a>, <a href="https://publications.waset.org/abstracts/search?q=composite" title=" composite"> composite</a>, <a href="https://publications.waset.org/abstracts/search?q=accuracy" title=" accuracy"> accuracy</a> </p> <a href="https://publications.waset.org/abstracts/57424/improved-accuracy-of-ratio-multiple-valuation" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/57424.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">282</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">6168</span> Self Tuning Controller for Reducing Cycle to Cycle Variations in SI Engine </h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Alir%C4%B1za%20Kaleli">Alirıza Kaleli</a>, <a href="https://publications.waset.org/abstracts/search?q=M.%20Akif%20Ceviz"> M. Akif Ceviz</a>, <a href="https://publications.waset.org/abstracts/search?q=Erdo%C4%9Fan%20G%C3%BCner"> Erdoğan Güner</a>, <a href="https://publications.waset.org/abstracts/search?q=K%C3%B6ksal%20Erent%C3%BCrk"> Köksal Erentürk</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The cyclic variations in spark ignition engines occurring especially under specific engine operating conditions make the maximum pressure variable for successive in-cylinder pressure cycles. Minimization of cyclic variations has a great importance in effectively operating near to lean limit, or at low speed and load. The cyclic variations may reduce the power output of the engine, lead to operational instabilities, and result in undesirable engine vibrations and noise. In this study, spark timing is controlled in order to reduce the cyclic variations in spark ignition engines. Firstly, an ARMAX model has developed between spark timing and maximum pressure using system identification techniques. By using this model, the maximum pressure of the next cycle has been predicted. Then, self-tuning minimum variance controller has been designed to change the spark timing for consecutive cycles of the first cylinder of test engine to regulate the in-cylinder maximum pressure. The performance of the proposed controller is illustrated in real time and experimental results show that the controller has a reliable effect on cycle to cycle variations of maximum cylinder pressure when the engine works under low speed conditions. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=cyclic%20variations" title="cyclic variations">cyclic variations</a>, <a href="https://publications.waset.org/abstracts/search?q=cylinder%20pressure" title=" cylinder pressure"> cylinder pressure</a>, <a href="https://publications.waset.org/abstracts/search?q=SI%20engines" title=" SI engines"> SI engines</a>, <a href="https://publications.waset.org/abstracts/search?q=self%20tuning%20controller" title=" self tuning controller "> self tuning controller </a> </p> <a href="https://publications.waset.org/abstracts/21971/self-tuning-controller-for-reducing-cycle-to-cycle-variations-in-si-engine" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/21971.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">481</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">6167</span> Metal-Oxide-Semiconductor-Only Process Corner Monitoring Circuit</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Davit%20Mirzoyan">Davit Mirzoyan</a>, <a href="https://publications.waset.org/abstracts/search?q=Ararat%20Khachatryan"> Ararat Khachatryan</a> </p> <p class="card-text"><strong>Abstract:</strong></p> A process corner monitoring circuit (PCMC) is presented in this work. The circuit generates a signal, the logical value of which depends on the process corner only. The signal can be used in both digital and analog circuits for testing and compensation of process variations (PV). The presented circuit uses only metal-oxide-semiconductor (MOS) transistors, which allow increasing its detection accuracy, decrease power consumption and area. Due to its simplicity the presented circuit can be easily modified to monitor parametrical variations of only n-type and p-type MOS (NMOS and PMOS, respectively) transistors, resistors, as well as their combinations. Post-layout simulation results prove correct functionality of the proposed circuit, i.e. ability to monitor the process corner (equivalently die-to-die variations) even in the presence of within-die variations. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=detection" title="detection">detection</a>, <a href="https://publications.waset.org/abstracts/search?q=monitoring" title=" monitoring"> monitoring</a>, <a href="https://publications.waset.org/abstracts/search?q=process%20corner" title=" process corner"> process corner</a>, <a href="https://publications.waset.org/abstracts/search?q=process%20variation" title=" process variation"> process variation</a> </p> <a href="https://publications.waset.org/abstracts/65067/metal-oxide-semiconductor-only-process-corner-monitoring-circuit" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/65067.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">525</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">6166</span> A More Powerful Test Procedure for Multiple Hypothesis Testing</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Shunpu%20Zhang">Shunpu Zhang</a> </p> <p class="card-text"><strong>Abstract:</strong></p> We propose a new multiple test called the minPOP test for testing multiple hypotheses simultaneously. Under the assumption that the test statistics are independent, we show that the minPOP test has higher global power than the existing multiple testing methods. We further propose a stepwise multiple-testing procedure based on the minPOP test and two of its modified versions (the Double Truncated and Left Truncated minPOP tests). We show that these multiple tests have strong control of the family-wise error rate (FWER). A method for finding the p-values of the proposed tests after adjusting for multiplicity is also developed. Simulation results show that the Double Truncated and Left Truncated minPOP tests, in general, have a higher number of rejections than the existing multiple testing procedures. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=multiple%20test" title="multiple test">multiple test</a>, <a href="https://publications.waset.org/abstracts/search?q=single-step%20procedure" title=" single-step procedure"> single-step procedure</a>, <a href="https://publications.waset.org/abstracts/search?q=stepwise%20procedure" title=" stepwise procedure"> stepwise procedure</a>, <a href="https://publications.waset.org/abstracts/search?q=p-value%20for%20multiple%20testing" title=" p-value for multiple testing"> p-value for multiple testing</a> </p> <a href="https://publications.waset.org/abstracts/183745/a-more-powerful-test-procedure-for-multiple-hypothesis-testing" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/183745.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">83</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">6165</span> A Two Tailed Secretary Problem with Multiple Criteria</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Alaka%20Padhye">Alaka Padhye</a>, <a href="https://publications.waset.org/abstracts/search?q=S.%20P.%20Kane"> S. P. Kane </a> </p> <p class="card-text"><strong>Abstract:</strong></p> The following study considers some variations made to the secretary problem (SP). In a multiple criteria secretary problem (MCSP), the selection of a unit is based on two independent characteristics. The units that appear before an observer are known say N, the best rank of a unit being N. A unit is selected, if it is better with respect to either first or second or both the characteristics. When the number of units is large and due to constraints like time and cost, the observer might want to stop earlier instead of inspecting all the available units. Let the process terminate at r2th unit where r1<r2<N, r1 being the number of units observed but not selected. This situation is called as a two tailed secretary problem (TTSP). The article presented tries to analyze the combination of TTSP and multiple criteria in detail. Joint as well as marginal probability distributions (of real ranks of both the characteristics and the position at which the selection is made) have been derived systematically using a simple yet explicable method. A new criterion for selecting the best unit based on the expected real rank has been developed. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=joint%20distribution" title="joint distribution">joint distribution</a>, <a href="https://publications.waset.org/abstracts/search?q=marginal%20distribution" title=" marginal distribution"> marginal distribution</a>, <a href="https://publications.waset.org/abstracts/search?q=real%20ranks" title=" real ranks"> real ranks</a>, <a href="https://publications.waset.org/abstracts/search?q=secretary%20problem" title=" secretary problem"> secretary problem</a>, <a href="https://publications.waset.org/abstracts/search?q=selection%20criterion" title=" selection criterion"> selection criterion</a>, <a href="https://publications.waset.org/abstracts/search?q=two%20tailed%20secretary%20problem" title=" two tailed secretary problem"> two tailed secretary problem</a> </p> <a href="https://publications.waset.org/abstracts/42589/a-two-tailed-secretary-problem-with-multiple-criteria" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/42589.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">271</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">6164</span> Macroeconomic Determinants of Cyclical Variations in Value, Size, and Momentum Premium in the UK</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=G.%20Sarwar">G. Sarwar</a>, <a href="https://publications.waset.org/abstracts/search?q=C.%20Mateus"> C. Mateus</a>, <a href="https://publications.waset.org/abstracts/search?q=N.%20Todorovic"> N. Todorovic</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The paper examines the asymmetries in size, value and momentum premium over the economic cycles in the UK and their macroeconomic determinants. Using Markov switching approach we find clear evidence of cyclical variations of the three premiums, most noticeably variations in size premium. We associate Markov switching regime 1 with economic upturn and regime 2 with economic downturn as per OECD’s Composite Leading Indicator. The macroeconomic indicators prompting such cyclicality the most are interest rates, term structure and credit spread. The role of GDP growth, money supply and inflation is less pronounced in our sample. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=macroeconomic%20determinants" title="macroeconomic determinants">macroeconomic determinants</a>, <a href="https://publications.waset.org/abstracts/search?q=Markorv%20Switching" title=" Markorv Switching"> Markorv Switching</a>, <a href="https://publications.waset.org/abstracts/search?q=size" title=" size"> size</a>, <a href="https://publications.waset.org/abstracts/search?q=value" title=" value "> value </a> </p> <a href="https://publications.waset.org/abstracts/23394/macroeconomic-determinants-of-cyclical-variations-in-value-size-and-momentum-premium-in-the-uk" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/23394.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">486</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">6163</span> Assessing Proteomic Variations Due to Genetic Modification of Tomatoes Using Three Complementary Approaches</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Hanaa%20A.%20S.%20Oraby">Hanaa A. S. Oraby</a>, <a href="https://publications.waset.org/abstracts/search?q=Amal%20A.%20M.%20Hassan"> Amal A. M. Hassan</a>, <a href="https://publications.waset.org/abstracts/search?q=Mahmoud%20M.%20Sakr"> Mahmoud M. Sakr</a>, <a href="https://publications.waset.org/abstracts/search?q=Atef%20A.%20A.%20Haiba"> Atef A. A. Haiba</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Applying the profiling approach for the assessment of proteomic variations due to genetic modification of the Egyptian tomato cultivar "Edkawy", three complementary approaches were used. These methods are amino acids analysis, gel electrophoresis, and Gas chromatography coupled with mass spectrometry (GC/MS). The results of the present study Show evidence of proteomic variations between both modified tomato and its non-modified counterpart. Amino acids concentrations, and the protein patterns separation on the 1D SDS-PAGE were not similar in the case of transformed tomato compared to that of the non-transformed counterpart. These detected differences are most likely derived from the process of transformation. Results also revealed that the efficiency of GC/MS approach to identify a mixture of unknown proteins is limited. GC/MS analysis was only able to identify few number of protein molecules. Therefore, more advanced and specific technologies like MALDI-TOF-MS are recommended to be employed. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=GMOs" title="GMOs">GMOs</a>, <a href="https://publications.waset.org/abstracts/search?q=unintended%20effects" title=" unintended effects"> unintended effects</a>, <a href="https://publications.waset.org/abstracts/search?q=proteomic%20variations" title=" proteomic variations"> proteomic variations</a>, <a href="https://publications.waset.org/abstracts/search?q=1D%20SDS-PAGE" title=" 1D SDS-PAGE"> 1D SDS-PAGE</a>, <a href="https://publications.waset.org/abstracts/search?q=GC%2FMS" title=" GC/MS "> GC/MS </a> </p> <a href="https://publications.waset.org/abstracts/26200/assessing-proteomic-variations-due-to-genetic-modification-of-tomatoes-using-three-complementary-approaches" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/26200.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">454</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">6162</span> Simulation with Uncertainties of Active Controlled Vibration Isolation System for Astronaut’s Exercise Platform</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Shield%20B.%20Lin">Shield B. Lin</a>, <a href="https://publications.waset.org/abstracts/search?q=Ziraguen%20O.%20Williams"> Ziraguen O. Williams</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In a task to assist NASA in analyzing the dynamic forces caused by operational countermeasures of an astronaut’s exercise platform impacting the spacecraft, an active proportional-integral-derivative controller commanding a linear actuator is proposed in a vibration isolation system to regulate the movement of the exercise platform. Computer simulation shows promising results that most exciter forces can be reduced or even eliminated. This paper emphasizes on parameter uncertainties, variations and exciter force variations. Drift and variations of system parameters in the vibration isolation system for astronaut’s exercise platform are analyzed. An active controlled scheme is applied with the goals to reduce the platform displacement and to minimize the force being transmitted to the spacecraft structure. The controller must be robust enough to accommodate the wide variations of system parameters and exciter forces. Computer simulation for the vibration isolation system was performed via MATLAB/Simulink and Trick. The simulation results demonstrate the achievement of force reduction with small platform displacement under wide ranges of variations in system parameters. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=control" title="control">control</a>, <a href="https://publications.waset.org/abstracts/search?q=counterweight" title=" counterweight"> counterweight</a>, <a href="https://publications.waset.org/abstracts/search?q=isolation" title=" isolation"> isolation</a>, <a href="https://publications.waset.org/abstracts/search?q=vibration" title=" vibration"> vibration</a> </p> <a href="https://publications.waset.org/abstracts/138810/simulation-with-uncertainties-of-active-controlled-vibration-isolation-system-for-astronauts-exercise-platform" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/138810.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">146</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">6161</span> Evolution of Relations among Multiple Institutional Logics: A Case Study from a Higher Education Institution</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Ye%20Jiang">Ye Jiang</a> </p> <p class="card-text"><strong>Abstract:</strong></p> To examine how the relationships among multiple institutional logics vary over time and the factors that may impact this process, we conducted a 15-year in-depth longitudinal case study of a Higher Education Institution to examine its exploration in college student management. By employing constructive grounded theory, we developed a four-stage process model comprising separation, formalization, selective bridging, and embeddedness that showed how two contradictory logics become complementary, and finally become a new hybridized logic. We argue that selective bridging is an important step in changing inter-logic relations. We also found that ambidextrous leadership and situational sensemaking are two key factors that drive this process. Our contribution to the literature is threefold. First, we enhance the literature on the changing relationships among multiple institutional logics and our findings advance the understanding of relationships between multiple logics through a dynamic view. While most studies have tended to assume that the relationship among logics is static and persistently in a contentious state, we contend that the relationships among multiple institutional logics can change over time. Competitive logics can become complementary, and a new hybridized logic can emerge therefrom. The four-stage logic hybridization process model offers insights on the logic hybridization process, which is underexplored in the literature. Second, our research reveals that selective bridging is important in making conflicting logics compatible, and thus constitutes a key step in creating new hybridized logic dynamics. Our findings suggest that the relations between multiple logics are manageable and can thus be manipulated for organizational innovation. Finally, the factors influencing the variations in inter-logic relations enrich the understanding of the antecedents of these dynamics. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=institutional%20theory" title="institutional theory">institutional theory</a>, <a href="https://publications.waset.org/abstracts/search?q=institutional%20logics" title=" institutional logics"> institutional logics</a>, <a href="https://publications.waset.org/abstracts/search?q=ambidextrous%20leadership" title=" ambidextrous leadership"> ambidextrous leadership</a>, <a href="https://publications.waset.org/abstracts/search?q=situational%20sensemaking" title=" situational sensemaking"> situational sensemaking</a> </p> <a href="https://publications.waset.org/abstracts/148760/evolution-of-relations-among-multiple-institutional-logics-a-case-study-from-a-higher-education-institution" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/148760.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">165</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">6160</span> Time Varying Crustal Anisotropy at Whakaari/White Island Volcano</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=M.%20Dagim%20Yoseph">M. Dagim Yoseph</a>, <a href="https://publications.waset.org/abstracts/search?q=M.%20K.%20Savage"> M. K. Savage</a>, <a href="https://publications.waset.org/abstracts/search?q=A.%20D.%20Jolly"> A. D. Jolly</a>, <a href="https://publications.waset.org/abstracts/search?q=C.%20J.%20Ebinger"> C. J. Ebinger</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Whakaari/White Island has been the most active New Zealand volcano in the 21st century, producing small phreatic and phreatomagmatic eruptions, which are hard to predict. The most recent eruption occurred in 2019, tragically claiming the lives of 22 individuals and causing numerous injuries. We employed shear-wave splitting analyses to investigate variations in anisotropy between 2018 and 2020, during quiescence, unrest, and the eruption. We examined spatial and temporal variations in 3499 shear-wave splitting and 2656 V_p/V_s ratio measurements. Comparing shear-wave splitting parameters from similar earthquake paths across different times indicates that the observed temporal changes are unlikely to result from variations in earthquake paths through media with spatial variability. Instead, these changes may stem from variations in anisotropy over time, likely caused by changes in crack alignment due to stress or varying fluid content. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=background%20seismic%20waves" title="background seismic waves">background seismic waves</a>, <a href="https://publications.waset.org/abstracts/search?q=fast%20orientations" title=" fast orientations"> fast orientations</a>, <a href="https://publications.waset.org/abstracts/search?q=seismic%20anisotropy" title=" seismic anisotropy"> seismic anisotropy</a>, <a href="https://publications.waset.org/abstracts/search?q=V_p%2FV_s%20ratio" title=" V_p/V_s ratio"> V_p/V_s ratio</a> </p> <a href="https://publications.waset.org/abstracts/185200/time-varying-crustal-anisotropy-at-whakaariwhite-island-volcano" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/185200.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">46</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">6159</span> Review of the Anatomy of the Middle Cerebral Artery and Its Anomalies</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Karen%20Cilliers">Karen Cilliers</a>, <a href="https://publications.waset.org/abstracts/search?q=Benedict%20John%20Page"> Benedict John Page</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The middle cerebral artery (MCA) is the most complex cerebral artery although few anomalies are found compared to the other cerebral arteries. The branches of the MCA cover a large part of each hemisphere, therefore it is exposed in various operations. Although the segments of the MCA are similarly described by most authors, there is some disagreement on the branching pattern of the MCA. The aim of this study was to review the available literature on the anatomy and variations of the MCA, and to compare this to a pilot study. For the pilot study, 20 hemispheres were perfused with coloured silicone and the MCA was dissected. According to the literature, the two most common branching configurations are the bifurcating and trifurcating patterns. In the pilot study, bifurcation was observed in 19 hemispheres, and in one hemisphere there was no branching (monofurcation). No trifurcation was observed. The most commonly duplicated branch was the anterior parietal artery in 30%, and most commonly absent was the common temporal artery in 65% and the temporal polar artery in 40%. Very few studies describe the origins of the branches of the MCA, therefore a detailed description is given. Middle cerebral artery variations that are occasionally reported in the literature include fenestration, and a duplicated or accessory MCA, although no variations were observed in the pilot study. Aneurysms can frequently be observed at the branching of cerebral vessels, therefore a thorough knowledge of the vascular anatomy is vital. Furthermore, knowledge of possible variations is important since variations can have serious clinical implications. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=anatomy" title="anatomy">anatomy</a>, <a href="https://publications.waset.org/abstracts/search?q=anomaly" title=" anomaly"> anomaly</a>, <a href="https://publications.waset.org/abstracts/search?q=description" title=" description"> description</a>, <a href="https://publications.waset.org/abstracts/search?q=middle%20cerebral%20artery" title=" middle cerebral artery"> middle cerebral artery</a>, <a href="https://publications.waset.org/abstracts/search?q=origin" title=" origin"> origin</a>, <a href="https://publications.waset.org/abstracts/search?q=variation" title=" variation"> variation</a> </p> <a href="https://publications.waset.org/abstracts/32595/review-of-the-anatomy-of-the-middle-cerebral-artery-and-its-anomalies" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/32595.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">347</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">6158</span> Radar Signal Detection Using Neural Networks in Log-Normal Clutter for Multiple Targets Situations</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Boudemagh%20Naime">Boudemagh Naime</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Automatic radar detection requires some methods of adapting to variations in the background clutter in order to control their false alarm rate. The problem becomes more complicated in non-Gaussian environment. In fact, the conventional approach in real time applications requires a complex statistical modeling and much computational operations. To overcome these constraints, we propose another approach based on artificial neural network (ANN-CMLD-CFAR) using a Back Propagation (BP) training algorithm. The considered environment follows a log-normal distribution in the presence of multiple Rayleigh-targets. To evaluate the performances of the considered detector, several situations, such as scale parameter and the number of interferes targets, have been investigated. The simulation results show that the ANN-CMLD-CFAR processor outperforms the conventional statistical one. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=radat%20detection" title="radat detection">radat detection</a>, <a href="https://publications.waset.org/abstracts/search?q=ANN-CMLD-CFAR" title=" ANN-CMLD-CFAR"> ANN-CMLD-CFAR</a>, <a href="https://publications.waset.org/abstracts/search?q=log-normal%20clutter" title=" log-normal clutter"> log-normal clutter</a>, <a href="https://publications.waset.org/abstracts/search?q=statistical%20modelling" title=" statistical modelling "> statistical modelling </a> </p> <a href="https://publications.waset.org/abstracts/30070/radar-signal-detection-using-neural-networks-in-log-normal-clutter-for-multiple-targets-situations" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/30070.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">364</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">6157</span> The Sr-Nd Isotope Data of the Platreef Rocks from the Northern Limb of the Bushveld Igneous Complex: Evidence of Contrasting Magma Composition and Origin</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Tshipeng%20Mwenze">Tshipeng Mwenze</a>, <a href="https://publications.waset.org/abstracts/search?q=Charles%20Okujeni"> Charles Okujeni</a>, <a href="https://publications.waset.org/abstracts/search?q=Abdi%20Siad"> Abdi Siad</a>, <a href="https://publications.waset.org/abstracts/search?q=Russel%20Bailie"> Russel Bailie</a>, <a href="https://publications.waset.org/abstracts/search?q=Dirk%20Frei"> Dirk Frei</a>, <a href="https://publications.waset.org/abstracts/search?q=Marcelene%20Voigt"> Marcelene Voigt</a>, <a href="https://publications.waset.org/abstracts/search?q=Petrus%20Le%20Roux"> Petrus Le Roux</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The Platreef is a platinum group element (PGE) deposit in the northern limb of the Bushveld Igneous Complex (BIC) which was emplaced as a series of mafic and ultramafic sills between the Main Zone (MZ) and the country rocks. The PGE mineralisation in the Platreef is hosted in different rock types, and its distribution and style vary with depth and along strike. This study contributes towards understanding the processes involved in the genesis of the Platreef. Twenty-four Platreef (2 harzburgites, 4 olivine pyroxenites, 17 feldspathic pyroxenites and 1 gabbronorite) and few MZ (1 gabbronorite and 1 leucogabbronorite) quarter core samples were collected from four drill cores (e.g., TN754, TN200, SS339, and OY482) and analysed for whole-rock Sr-Nd isotope data. The results show positive ɛNd values (+3.53 to +7.51) for harzburgites suggesting their parental magmas derived from the depleted Mantle. The remaining Platreef rocks have negative ɛNd values (-2.91 to -22.88) and show significant variations in Sr-Nd isotopic compositions. The first group of Platreef samples has relatively high isotopic compositions (ɛNd= -2.91 to -5.68; ⁸⁷Sr/⁸⁶Sri= 0.709177 - 0.711998). The second group of Platreef samples has Sr ratios (⁸⁷Sr/⁸⁶Sri= 0.709816-0.712106) overlapping with samples of the first group but slightly lower ɛNd values (-7.44 to -8.39). Lastly, the third group of Platreef samples has low ɛNd values (-10.82 to -14.32) and low Sr ratios (⁸⁷Sr/⁸⁶Sri= 0.707545-0.710042) than those from samples of the two Platreef groups mentioned above. There is, however, a Platreef sample with ɛNd value (-5.26) in range with the Platreef samples of the first group, but its Sr ratio (0.707281) is the lowest even when compared to samples of the third Platreef group. There are also five other Platreef samples which have either anomalous ɛNd or Sr ratios which make it difficult to assess their isotopic compositions relative to other samples. These isotopic variations for the Platreef samples indicate both multiple sources and multiple magma chambers where varying crustal contamination styles have operated during the evolution of these magmas prior their emplacements into the Platreef setting as sills. Furthermore, the MZ rocks have different Sr-Nd isotopic compositions (For OY482 gabbronorite [ɛNd= +0.65; ⁸⁷Sr/⁸⁶Sri= 0.711746]; for TN754 leucogabbronorite [ɛNd= -7.44; ⁸⁷Sr/⁸⁶Sri= 0.709322]) which do not only indicate different MZ magma chambers, but also different magmas from those of the Platreef. Although the Platreef is still considered a single stratigraphic unit in the northern limb of the BIC, its genesis involved multiple magmatic processes which evolved independently from each other. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=crustal%20contamination%20styles" title="crustal contamination styles">crustal contamination styles</a>, <a href="https://publications.waset.org/abstracts/search?q=magma%20chambers" title=" magma chambers"> magma chambers</a>, <a href="https://publications.waset.org/abstracts/search?q=magma%20sources" title=" magma sources"> magma sources</a>, <a href="https://publications.waset.org/abstracts/search?q=multiple%20sills%20emplacement" title=" multiple sills emplacement"> multiple sills emplacement</a> </p> <a href="https://publications.waset.org/abstracts/96022/the-sr-nd-isotope-data-of-the-platreef-rocks-from-the-northern-limb-of-the-bushveld-igneous-complex-evidence-of-contrasting-magma-composition-and-origin" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/96022.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">167</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">6156</span> Variations and Fugue on an Ancient Taiwanese Music: The Art of Combining Taiwanese Traditional Music and Western Composition in Kuo Chih-Yuan's Piano Repertoire</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Sheng-Wei%20Hsu">Sheng-Wei Hsu</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Taiwanese composer Kuo Chih-Yuan (1921-2013) studied composition at Tokyo University of the Arts and was influenced by the musical nationalism prevailing in Japan at the time. Determined to create world-class contemporary works to represent Taiwan, he created music with elements of traditional Taiwanese music in ways that had not been done before. The aims of this study were to examine the traditional elements used in Kuo Chih-Yuan’s Variations and Fugue on an Ancient Taiwanese Music (1972), and how an understanding of these elements might guide pianists to interpret a more proper performance of his work was also presented in this study. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=Taiwanese%20traditional%20music" title="Taiwanese traditional music">Taiwanese traditional music</a>, <a href="https://publications.waset.org/abstracts/search?q=piano%20performance%20research" title=" piano performance research"> piano performance research</a>, <a href="https://publications.waset.org/abstracts/search?q=Kuo%20Chih-Yuan" title=" Kuo Chih-Yuan"> Kuo Chih-Yuan</a>, <a href="https://publications.waset.org/abstracts/search?q=fugue" title=" fugue"> fugue</a>, <a href="https://publications.waset.org/abstracts/search?q=variations" title=" variations"> variations</a> </p> <a href="https://publications.waset.org/abstracts/22461/variations-and-fugue-on-an-ancient-taiwanese-music-the-art-of-combining-taiwanese-traditional-music-and-western-composition-in-kuo-chih-yuans-piano-repertoire" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/22461.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">502</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">6155</span> Studying the Spatial Variations of Stable Isotopes (18O and 2H) in Precipitation and Groundwater Resources in Zagros Region</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Mojtaba%20Heydarizad">Mojtaba Heydarizad</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Zagros mountain range is a very important precipitation zone in Iran as it receives high average annual precipitation compared to other parts of this country. Although this region is important precipitation zone in semi-arid an arid country like Iran, accurate method to study water resources in this region has not been applied yet. In this study, stable isotope δ<sup>18</sup>O content of precipitation and groundwater resources showed spatial variations across Zagros region as southern parts of Zagros region showed more enriched isotope values compared to the northern parts. This is normal as southern Zagros region is much drier with higher air temperature and evaporation compared to northern parts. In addition, the spatial variations of stable isotope δ<sup>18</sup>O in precipitation in Zagros region have been simulated by the models which consider the altitude and latitude variations as input to simulate δ<sup>18</sup>O in precipitation. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=groundwater" title="groundwater">groundwater</a>, <a href="https://publications.waset.org/abstracts/search?q=precipitation" title=" precipitation"> precipitation</a>, <a href="https://publications.waset.org/abstracts/search?q=simulation" title=" simulation"> simulation</a>, <a href="https://publications.waset.org/abstracts/search?q=stable%20isotopes" title=" stable isotopes"> stable isotopes</a>, <a href="https://publications.waset.org/abstracts/search?q=Zagros%20region" title=" Zagros region "> Zagros region </a> </p> <a href="https://publications.waset.org/abstracts/108779/studying-the-spatial-variations-of-stable-isotopes-18o-and-2h-in-precipitation-and-groundwater-resources-in-zagros-region" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/108779.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">138</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">6154</span> Moisture Variations in Unbound Layers in an Instrumented Pavement Section</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=R.%20Islam">R. Islam</a>, <a href="https://publications.waset.org/abstracts/search?q=Rafiqul%20A.%20Tarefder"> Rafiqul A. Tarefder</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This study presents the moisture variations of unbound layers from April 2012 to January 2014 in the Interstate 40 (I-40) pavement section in New Mexico. Three moisture probes were installed at different layers inside the pavement which measure the continuous moisture variations of the pavement. Data show that the moisture contents of unbound layers are typically constant throughout the day and month unless there is rainfall. Moisture contents of all unbound layers change with rainfall. Change in ground water table may affect the moisture content of unbound layers which has not investigated in this study. In addition, the Level 3 predictions of moisture contents using the Pavement Mechanistic-Empirical (ME) Design software are compared and found quite reasonable. However, results presented in the current study may not be applicable for pavement in other regions. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=asphalt%20pavement" title="asphalt pavement">asphalt pavement</a>, <a href="https://publications.waset.org/abstracts/search?q=moisture%20probes" title=" moisture probes"> moisture probes</a>, <a href="https://publications.waset.org/abstracts/search?q=resilient%20modulus" title=" resilient modulus"> resilient modulus</a>, <a href="https://publications.waset.org/abstracts/search?q=climate%20model" title=" climate model "> climate model </a> </p> <a href="https://publications.waset.org/abstracts/21090/moisture-variations-in-unbound-layers-in-an-instrumented-pavement-section" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/21090.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">493</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">6153</span> Grating Scale Thermal Expansion Error Compensation for Large Machine Tools Based on Multiple Temperature Detection</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Wenlong%20Feng">Wenlong Feng</a>, <a href="https://publications.waset.org/abstracts/search?q=Zhenchun%20Du"> Zhenchun Du</a>, <a href="https://publications.waset.org/abstracts/search?q=Jianguo%20Yang"> Jianguo Yang</a> </p> <p class="card-text"><strong>Abstract:</strong></p> To decrease the grating scale thermal expansion error, a novel method which based on multiple temperature detections is proposed. Several temperature sensors are installed on the grating scale and the temperatures of these sensors are recorded. The temperatures of every point on the grating scale are calculated by interpolating between adjacent sensors. According to the thermal expansion principle, the grating scale thermal expansion error model can be established by doing the integral for the variations of position and temperature. A novel compensation method is proposed in this paper. By applying the established error model, the grating scale thermal expansion error is decreased by 90% compared with no compensation. The residual positioning error of the grating scale is less than 15um/10m and the accuracy of the machine tool is significant improved. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=thermal%20expansion%20error%20of%20grating%20scale" title="thermal expansion error of grating scale">thermal expansion error of grating scale</a>, <a href="https://publications.waset.org/abstracts/search?q=error%20compensation" title=" error compensation"> error compensation</a>, <a href="https://publications.waset.org/abstracts/search?q=machine%20tools" title=" machine tools"> machine tools</a>, <a href="https://publications.waset.org/abstracts/search?q=integral%20method" title=" integral method"> integral method</a> </p> <a href="https://publications.waset.org/abstracts/34355/grating-scale-thermal-expansion-error-compensation-for-large-machine-tools-based-on-multiple-temperature-detection" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/34355.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">365</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">6152</span> Multi-Linear Regression Based Prediction of Mass Transfer by Multiple Plunging Jets</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=S.%20Deswal">S. Deswal</a>, <a href="https://publications.waset.org/abstracts/search?q=M.%20Pal"> M. Pal</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The paper aims to compare the performance of vertical and inclined multiple plunging jets and to model and predict their mass transfer capacity by multi-linear regression based approach. The multiple vertical plunging jets have jet impact angle of θ = 90O; whereas, multiple inclined plunging jets have jet impact angle of θ = 600. The results of the study suggests that mass transfer is higher for multiple jets, and inclined multiple plunging jets have up to 1.6 times higher mass transfer than vertical multiple plunging jets under similar conditions. The derived relationship, based on multi-linear regression approach, has successfully predicted the volumetric mass transfer coefficient (KLa) from operational parameters of multiple plunging jets with a correlation coefficient of 0.973, root mean square error of 0.002 and coefficient of determination of 0.946. The results suggests that predicted overall mass transfer coefficient is in good agreement with actual experimental values; thereby suggesting the utility of derived relationship based on multi-linear regression based approach and can be successfully employed in modelling mass transfer by multiple plunging jets. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=mass%20transfer" title="mass transfer">mass transfer</a>, <a href="https://publications.waset.org/abstracts/search?q=multiple%20plunging%20jets" title=" multiple plunging jets"> multiple plunging jets</a>, <a href="https://publications.waset.org/abstracts/search?q=multi-linear%20regression" title=" multi-linear regression"> multi-linear regression</a>, <a href="https://publications.waset.org/abstracts/search?q=earth%20sciences" title=" earth sciences"> earth sciences</a> </p> <a href="https://publications.waset.org/abstracts/5905/multi-linear-regression-based-prediction-of-mass-transfer-by-multiple-plunging-jets" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/5905.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">461</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">6151</span> Variations in the Frequency-Magnitude Distribution with Depth in Kalabsha Area, Aswan, South Egypt</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Ezzat%20Mohamed%20El-Amin">Ezzat Mohamed El-Amin</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Mapping the earthquake-size distribution in various tectonic regimes on a local to regional scale reveals statistically significant variations in the range of at least 0.4 to 2.0 for the b-value in the frequency-magnitude distribution. We map the earthquake frequency–magnitude distribution (b value) as a function of depth in the Reservoir Triggered Seismicity (RTS) region in Kalabsha region, in south Egypt. About 1680 well-located events recorded during 1981–2014 in the Kalabsha region are selected for the analysis. The earthquake data sets are separated in 5 km zones from 0 to 25 km depth. The result shows a systematic decrease in b value up to 12 km followed by an increase. The increase in b value is interpreted to be caused by the presence of ﬂuids. We also investigate the spatial distribution of b value with depth. Signiﬁcant variations in the b value are detected, with b ranging from b 0.7 to 1.19. Low b value areas at 5 km depth indicate localized high stresses which are favorable for future rupture. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=seismicity" title="seismicity">seismicity</a>, <a href="https://publications.waset.org/abstracts/search?q=frequency-magnitude" title=" frequency-magnitude"> frequency-magnitude</a>, <a href="https://publications.waset.org/abstracts/search?q=b-value" title=" b-value"> b-value</a>, <a href="https://publications.waset.org/abstracts/search?q=earthquake" title=" earthquake"> earthquake</a> </p> <a href="https://publications.waset.org/abstracts/35965/variations-in-the-frequency-magnitude-distribution-with-depth-in-kalabsha-area-aswan-south-egypt" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/35965.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">557</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">6150</span> Robustness of the Fuzzy Adaptive Speed Control of a Multi-Phase Asynchronous Machine</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Bessaad%20Taieb">Bessaad Taieb</a>, <a href="https://publications.waset.org/abstracts/search?q=Benbouali%20Abderrahmen"> Benbouali Abderrahmen</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Fuzzy controllers are a powerful tool for controlling complex processes. However, its robustness capacity remains moderately limited because it loses its property for large ranges of parametric variations. In this paper, the proposed control method is designed, based on a fuzzy adaptive controller used as a remedy for this problem. For increase the robustness of the vector control and to maintain the performance of the five-phase asynchronous machine despite the presence of disturbances (variation of rotor resistance, rotor inertia variations, sudden variations in the load etc.), by applying the method of behaviour model control (BMC). The results of simulation show that the fuzzy adaptive control provides best performance and has a more robustness as the fuzzy (FLC) and as a conventional (PI) controller. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=fuzzy%20adaptive%20control" title="fuzzy adaptive control">fuzzy adaptive control</a>, <a href="https://publications.waset.org/abstracts/search?q=behaviour%20model%20control" title=" behaviour model control"> behaviour model control</a>, <a href="https://publications.waset.org/abstracts/search?q=vector%20control" title=" vector control"> vector control</a>, <a href="https://publications.waset.org/abstracts/search?q=five-phase%20asynchronous%20machine" title=" five-phase asynchronous machine"> five-phase asynchronous machine</a> </p> <a href="https://publications.waset.org/abstracts/168082/robustness-of-the-fuzzy-adaptive-speed-control-of-a-multi-phase-asynchronous-machine" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/168082.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">95</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">6149</span> Direct Measurement of Pressure and Temperature Variations During High-Speed Friction Experiments</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Simon%20Guerin-Marthe">Simon Guerin-Marthe</a>, <a href="https://publications.waset.org/abstracts/search?q=Marie%20Violay"> Marie Violay</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Thermal Pressurization (TP) has been proposed as a key mechanism involved in the weakening of faults during dynamic ruptures. Theoretical and numerical studies clearly show how frictional heating can lead to an increase in pore fluid pressure due to the rapid slip along faults occurring during earthquakes. In addition, recent laboratory studies have evidenced local pore pressure or local temperature variation during rotary shear tests, which are consistent with TP theoretical and numerical models. The aim of this study is to complement previous ones by measuring both local pore pressure and local temperature variations in the vicinity of a water-saturated calcite gouge layer subjected to a controlled slip velocity in direct double shear configuration. Laboratory investigation of TP process is crucial in order to understand the conditions at which it is likely to become a dominant mechanism controlling dynamic friction. It is also important in order to understand the timing and magnitude of temperature and pore pressure variations, to help understanding when it is negligible, and how it competes with other rather strengthening-mechanisms such as dilatancy, which can occur during rock failure. Here we present unique direct measurements of temperature and pressure variations during high-speed friction experiments under various load point velocities and show the timing of these variations relatively to the slip event. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=thermal%20pressurization" title="thermal pressurization">thermal pressurization</a>, <a href="https://publications.waset.org/abstracts/search?q=double-shear%20test" title=" double-shear test"> double-shear test</a>, <a href="https://publications.waset.org/abstracts/search?q=high-speed%20friction" title=" high-speed friction"> high-speed friction</a>, <a href="https://publications.waset.org/abstracts/search?q=dilatancy" title=" dilatancy"> dilatancy</a> </p> <a href="https://publications.waset.org/abstracts/170630/direct-measurement-of-pressure-and-temperature-variations-during-high-speed-friction-experiments" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/170630.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">61</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">6148</span> Genetic Algorithm Optimization of Multiple Resources for Multi-Projects</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=A.%20Samer%20Ezeldin">A. Samer Ezeldin</a>, <a href="https://publications.waset.org/abstracts/search?q=Sarah%20A.%20Fotouh"> Sarah A. Fotouh</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Optimization of resources is very important in all fields, as in construction management. Project managers have to face problems regarding management of cost, time and available resources of single projects and more problems arise when managing multiple projects. Most of the studies focused on optimization of resources for a single project, but, this paper will discuss the design and modeling of multiple resources optimization for multiple projects using Genetic Algorithm. Most of the companies in construction industry optimize the resources for single projects only, but with the presence of several mega projects in several developing countries running at the same time, there is a need for a model to enhance the efficiency of available resources and decreases the fluctuation as much as possible. The proposed model calculates the cost of each resource, tries to minimize the cost of extra resources as much as possible and generates the schedule of each project within a selected program. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=construction%20management" title="construction management">construction management</a>, <a href="https://publications.waset.org/abstracts/search?q=genetic%20algorithm" title=" genetic algorithm"> genetic algorithm</a>, <a href="https://publications.waset.org/abstracts/search?q=multiple%20projects" title=" multiple projects"> multiple projects</a>, <a href="https://publications.waset.org/abstracts/search?q=multiple%20resources" title=" multiple resources"> multiple resources</a>, <a href="https://publications.waset.org/abstracts/search?q=optimization" title=" optimization"> optimization</a> </p> <a href="https://publications.waset.org/abstracts/61061/genetic-algorithm-optimization-of-multiple-resources-for-multi-projects" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/61061.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">459</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">6147</span> Analysis of Ionospheric Variations over Japan during 23rd Solar Cycle Using Wavelet Techniques</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=C.%20S.%20Seema">C. S. Seema</a>, <a href="https://publications.waset.org/abstracts/search?q=P.%20R.%20Prince"> P. R. Prince</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The characterization of spatio-temporal inhomogeneities occurring in the ionospheric F₂ layer is remarkable since these variations are direct consequences of electrodynamical coupling between magnetosphere and solar events. The temporal and spatial variations of the F₂ layer, which occur with a period of several days or even years, mainly owe to geomagnetic and meteorological activities. The hourly F₂ layer critical frequency (foF2) over 23rd solar cycle (1996-2008) of three ionosonde stations (Wakkanai, Kokunbunji, and Okinawa) in northern hemisphere, which falls within same longitudinal span, is analyzed using continuous wavelet techniques. Morlet wavelet is used to transform continuous time series data of foF2 to a two dimensional time-frequency space, quantifying the time evolution of the oscillatory modes. The presence of significant time patterns (periodicities) at a particular time period and the time location of each periodicity are detected from the two-dimensional representation of the wavelet power, in the plane of scale and period of the time series. The mean strength of each periodicity over the entire period of analysis is studied using global wavelet spectrum. The quasi biennial, annual, semiannual, 27 day, diurnal and 12 hour variations of foF2 are clearly evident in the wavelet power spectra in all the three stations. Critical frequency oscillations with multi-day periods (2-3 days and 9 days in the low latitude station, 6-7 days in all stations and 15 days in mid-high latitude station) are also superimposed over large time scaled variations. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=continuous%20wavelet%20analysis" title="continuous wavelet analysis">continuous wavelet analysis</a>, <a href="https://publications.waset.org/abstracts/search?q=critical%20frequency" title=" critical frequency"> critical frequency</a>, <a href="https://publications.waset.org/abstracts/search?q=ionosphere" title=" ionosphere"> ionosphere</a>, <a href="https://publications.waset.org/abstracts/search?q=solar%20cycle" title=" solar cycle"> solar cycle</a> </p> <a href="https://publications.waset.org/abstracts/75814/analysis-of-ionospheric-variations-over-japan-during-23rd-solar-cycle-using-wavelet-techniques" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/75814.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">220</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">6146</span> Using Multi-Arm Bandits to Optimize Game Play Metrics and Effective Game Design</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Kenny%20Raharjo">Kenny Raharjo</a>, <a href="https://publications.waset.org/abstracts/search?q=Ramon%20Lawrence"> Ramon Lawrence</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Game designers have the challenging task of building games that engage players to spend their time and money on the game. There are an infinite number of game variations and design choices, and it is hard to systematically determine game design choices that will have positive experiences for players. In this work, we demonstrate how multi-arm bandits can be used to automatically explore game design variations to achieve improved player metrics. The advantage of multi-arm bandits is that they allow for continuous experimentation and variation, intrinsically converge to the best solution, and require no special infrastructure to use beyond allowing minor game variations to be deployed to users for evaluation. A user study confirms that applying multi-arm bandits was successful in determining the preferred game variation with highest play time metrics and can be a useful technique in a game designer's toolkit. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=game%20design" title="game design">game design</a>, <a href="https://publications.waset.org/abstracts/search?q=multi-arm%20bandit" title=" multi-arm bandit"> multi-arm bandit</a>, <a href="https://publications.waset.org/abstracts/search?q=design%20exploration%20and%20data%20mining" title=" design exploration and data mining"> design exploration and data mining</a>, <a href="https://publications.waset.org/abstracts/search?q=player%20metric%20optimization%20and%20analytics" title=" player metric optimization and analytics"> player metric optimization and analytics</a> </p> <a href="https://publications.waset.org/abstracts/56494/using-multi-arm-bandits-to-optimize-game-play-metrics-and-effective-game-design" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/56494.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">510</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">6145</span> Isan Symphonic Variations for Chorus and Orchestra</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Chananart%20Meenanan">Chananart Meenanan</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The composition Isan Symphonic Variations for Chorus and Orchestra is a musical composition inspired by Isan Folk music tunes. The composer has created the well crafted melodic variations and cultural sound character of the piece based on the Klon Lum Tang Isan Keaw (Green Isan’s short poems). Meanwhile, the poetic lyric has been motivatedly recreated to bring the abundance of Northeastern Thailand region’s sentiment back to life. Moreover, the sound of xylophone (Ponglang), the instruments of the orchestra and the chorus were blended in order to present Isan folk music’s character via the Western musical idiom. The 3 movement of this composition is divided as following: In Movement I (Allegro), the introduction has been represented the uniqueness in Isan folk music’s liveliness by expressing it through the sound of chorus and orchestra. The composer also added the melodious sound flavor by utilizing the variety of the muting sound style on trumpets and horns. In Movement II (Moderato), the aspect of the heterophonic approach music has been implied to the main idea of the entire movement whereby its formatted transformation worked effectively through chorus and the orchestra. In Movement III (Allegretto) the harmonic chromaticism was modified and applied as the symbolic icon of the entire movement. The transparence of Isan cultural sound was perfectly designed to be the highlight of this spectacular episode. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=Isan" title="Isan">Isan</a>, <a href="https://publications.waset.org/abstracts/search?q=symphonic%20variations" title=" symphonic variations"> symphonic variations</a>, <a href="https://publications.waset.org/abstracts/search?q=chorus" title=" chorus"> chorus</a>, <a href="https://publications.waset.org/abstracts/search?q=orchestra" title=" orchestra"> orchestra</a> </p> <a href="https://publications.waset.org/abstracts/13849/isan-symphonic-variations-for-chorus-and-orchestra" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/13849.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">244</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">6144</span> Quantitative Analysis of Contract Variations Impact on Infrastructure Project Performance</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Soheila%20Sadeghi">Soheila Sadeghi</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Infrastructure projects often encounter contract variations that can significantly deviate from the original tender estimates, leading to cost overruns, schedule delays, and financial implications. This research aims to quantitatively assess the impact of changes in contract variations on project performance by conducting an in-depth analysis of a comprehensive dataset from the Regional Airport Car Park project. The dataset includes tender budget, contract quantities, rates, claims, and revenue data, providing a unique opportunity to investigate the effects of variations on project outcomes. The study focuses on 21 specific variations identified in the dataset, which represent changes or additions to the project scope. The research methodology involves establishing a baseline for the project's planned cost and scope by examining the tender budget and contract quantities. Each variation is then analyzed in detail, comparing the actual quantities and rates against the tender estimates to determine their impact on project cost and schedule. The claims data is utilized to track the progress of work and identify deviations from the planned schedule. The study employs statistical analysis using R to examine the dataset, including tender budget, contract quantities, rates, claims, and revenue data. Time series analysis is applied to the claims data to track progress and detect variations from the planned schedule. Regression analysis is utilized to investigate the relationship between variations and project performance indicators, such as cost overruns and schedule delays. The research findings highlight the significance of effective variation management in construction projects. The analysis reveals that variations can have a substantial impact on project cost, schedule, and financial outcomes. The study identifies specific variations that had the most significant influence on the Regional Airport Car Park project's performance, such as PV03 (additional fill, road base gravel, spray seal, and asphalt), PV06 (extension to the commercial car park), and PV07 (additional box out and general fill). These variations contributed to increased costs, schedule delays, and changes in the project's revenue profile. The study also examines the effectiveness of project management practices in managing variations and mitigating their impact. The research suggests that proactive risk management, thorough scope definition, and effective communication among project stakeholders can help minimize the negative consequences of variations. The findings emphasize the importance of establishing clear procedures for identifying, assessing, and managing variations throughout the project lifecycle. The outcomes of this research contribute to the body of knowledge in construction project management by demonstrating the value of analyzing tender, contract, claims, and revenue data in variation impact assessment. However, the research acknowledges the limitations imposed by the dataset, particularly the absence of detailed contract and tender documents. This constraint restricts the depth of analysis possible in investigating the root causes and full extent of variations' impact on the project. Future research could build upon this study by incorporating more comprehensive data sources to further explore the dynamics of variations in construction projects. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=contract%20variation%20impact" title="contract variation impact">contract variation impact</a>, <a href="https://publications.waset.org/abstracts/search?q=quantitative%20analysis" title=" quantitative analysis"> quantitative analysis</a>, <a href="https://publications.waset.org/abstracts/search?q=project%20performance" title=" project performance"> project performance</a>, <a href="https://publications.waset.org/abstracts/search?q=claims%20analysis" title=" claims analysis"> claims analysis</a> </p> <a href="https://publications.waset.org/abstracts/187826/quantitative-analysis-of-contract-variations-impact-on-infrastructure-project-performance" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/187826.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">40</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">6143</span> Improved FP-Growth Algorithm with Multiple Minimum Supports Using Maximum Constraints</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Elsayeda%20M.%20Elgaml">Elsayeda M. Elgaml</a>, <a href="https://publications.waset.org/abstracts/search?q=Dina%20M.%20Ibrahim"> Dina M. Ibrahim</a>, <a href="https://publications.waset.org/abstracts/search?q=Elsayed%20A.%20Sallam"> Elsayed A. Sallam</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Association rule mining is one of the most important fields of data mining and knowledge discovery. In this paper, we propose an efficient multiple support frequent pattern growth algorithm which we called “MSFP-growth” that enhancing the FP-growth algorithm by making infrequent child node pruning step with multiple minimum support using maximum constrains. The algorithm is implemented, and it is compared with other common algorithms: Apriori-multiple minimum supports using maximum constraints and FP-growth. The experimental results show that the rule mining from the proposed algorithm are interesting and our algorithm achieved better performance than other algorithms without scarifying the accuracy. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=association%20rules" title="association rules">association rules</a>, <a href="https://publications.waset.org/abstracts/search?q=FP-growth" title=" FP-growth"> FP-growth</a>, <a href="https://publications.waset.org/abstracts/search?q=multiple%20minimum%20supports" title=" multiple minimum supports"> multiple minimum supports</a>, <a href="https://publications.waset.org/abstracts/search?q=Weka%20tool" title=" Weka tool"> Weka tool</a> </p> <a href="https://publications.waset.org/abstracts/28521/improved-fp-growth-algorithm-with-multiple-minimum-supports-using-maximum-constraints" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/28521.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">485</span> </span> </div> </div> <ul class="pagination"> <li class="page-item disabled"><span class="page-link">&lsaquo;</span></li> <li class="page-item active"><span class="page-link">1</span></li> <li class="page-item"><a class="page-link" href="https://publications.waset.org/abstracts/search?q=multiple%20variations&page=2">2</a></li> <li class="page-item"><a class="page-link" href="https://publications.waset.org/abstracts/search?q=multiple%20variations&page=3">3</a></li> <li class="page-item"><a class="page-link" href="https://publications.waset.org/abstracts/search?q=multiple%20variations&page=4">4</a></li> <li class="page-item"><a class="page-link" href="https://publications.waset.org/abstracts/search?q=multiple%20variations&page=5">5</a></li> <li class="page-item"><a class="page-link" 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