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Yokoyama</title> <meta name="description" content="Search results for: Itsuo Yokoyama"> <meta name="keywords" content="Itsuo Yokoyama"> <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 navbar-toggler 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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="Itsuo Yokoyama"> <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> 8</div> </div> </div> </div> <h1 class="mt-3 mb-3 text-center" style="font-size:1.6rem;">Search results for: Itsuo Yokoyama</h1> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">8</span> Three-Dimensional Computer Graphical Demonstration of Calcified Tissue and Its Clinical Significance</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Itsuo%20Yokoyama">Itsuo Yokoyama</a>, <a href="https://publications.waset.org/abstracts/search?q=Rikako%20Kikuti"> Rikako Kikuti</a>, <a href="https://publications.waset.org/abstracts/search?q=Miti%20Sekikawa"> Miti Sekikawa</a>, <a href="https://publications.waset.org/abstracts/search?q=Tosinori%20Asai"> Tosinori Asai</a>, <a href="https://publications.waset.org/abstracts/search?q=Sarai%20Tsuyoshi"> Sarai Tsuyoshi</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Introduction: Vascular access for hemodialysis therapy is often difficult, even for experienced medical personnel. Ultrasound guided needle placement have been performed occasionally but is not always helpful in certain cases with complicated vascular anatomy. Obtaining precise anatomical knowledge of the vascular structure is important to prevent access-related complications. With augmented reality (AR) device such as AR glasses, the virtual vascular structure is shown superimposed on the actual patient vessels, thus enabling the operator to maneuver catheter placement easily with free both hands. We herein report our method of AR guided vascular access method in dialysis treatment Methods: Three dimensional (3D) object of the arm with arteriovenous fistula is computer graphically created with 3D software from the data obtained by computer tomography, ultrasound echogram, and image scanner. The 3D vascular object thus created is viewed on the screen of the AR digital display device (such as AR glass or iPad). The picture of the vascular anatomical structure becomes visible, which is superimposed over the real patient’s arm, thereby the needle insertion be performed under the guidance of AR visualization with ease. By this method, technical difficulty in catheter placement for dialysis can be lessened and performed safely. Considerations: Virtual reality technology has been applied in various fields and medical use is not an exception. Yet AR devices have not been widely used among medical professions. Visualization of the virtual vascular object can be achieved by creation of accurate three dimensional object with the help of computer graphical technique. Although our experience is limited, this method is applicable with relative easiness and our accumulating evidence has suggested that our method of vascular access with the use of AR can be promising. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=abdominal-aorta" title="abdominal-aorta">abdominal-aorta</a>, <a href="https://publications.waset.org/abstracts/search?q=calcification" title=" calcification"> calcification</a>, <a href="https://publications.waset.org/abstracts/search?q=extraskeletal" title=" extraskeletal"> extraskeletal</a>, <a href="https://publications.waset.org/abstracts/search?q=dialysis" title=" dialysis"> dialysis</a>, <a href="https://publications.waset.org/abstracts/search?q=computer%20graphics" title=" computer graphics"> computer graphics</a>, <a href="https://publications.waset.org/abstracts/search?q=3DCG" title=" 3DCG"> 3DCG</a>, <a href="https://publications.waset.org/abstracts/search?q=CT" title=" CT"> CT</a>, <a href="https://publications.waset.org/abstracts/search?q=calcium" title=" calcium"> calcium</a>, <a href="https://publications.waset.org/abstracts/search?q=phosphorus" title=" phosphorus"> phosphorus</a> </p> <a href="https://publications.waset.org/abstracts/152713/three-dimensional-computer-graphical-demonstration-of-calcified-tissue-and-its-clinical-significance" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/152713.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">162</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">7</span> Dialysis Rehabilitation and Muscle Hypertrophy</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Itsuo%20Yokoyama">Itsuo Yokoyama</a>, <a href="https://publications.waset.org/abstracts/search?q=Rika%20Kikuti"> Rika Kikuti</a>, <a href="https://publications.waset.org/abstracts/search?q=Naoko%20Watabe"> Naoko Watabe</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Introduction: It has been known that chronic kidney disease (CKD) patients can benefit from physical exercise during dialysis therapy improving aerobic capacity, muscle function, cardiovascular function, and overall health-related quality of life. This study aimed to evaluate the effectiveness of dialysis rehabilitation. Materials and Methods: A total of 55 patients underwent two-hour resistance exercise training during each hemodialysis session for three consecutive months. Various routine clinical data were collected, including the calculation of the planar dimension of the muscle area in both upper legs at the level of the ischial bone. This area calculation was possible in 26 patients who had yearly plain abdominal computed tomography (CT) scans. DICOM files from the CT scans were used with 3D Slicer software for area calculation. An age and sex-matched group of 26 patients without dialysis rehabilitation also had yearly CT scans during the study period for comparison. Clinical data were compared between the two groups: Group A (rehabilitation) and Group B (non-rehabilitation). Results: There were no differences in basic laboratory data between the two groups. The average muscle area before and after rehabilitation in Group A was 212 cm² and 216 cm², respectively. In Group B, the average areas were 230.0 cm² and 225.8 cm². While there was no significant difference in absolute values, the average percentage increase in muscle area was +1.2% (ranging from -7.6% to 6.54%) for Group A and -2.0% (ranging from -12.1% to 4.9%) for Group B, which was statistically significant. In Group A, 9 of 26 were diabetic (DM), and 13 of 26 in Group B were non-DM. The increase in muscle area for DM patients was 4.9% compared to -0.7% for non-DM patients, which was significantly different. There were no significant differences between the two groups in terms of nutritional assessment, Kt/V, or incidence of clinical complications such as cardiovascular events. Considerations: Dialysis rehabilitation has been reported to prevent muscle atrophy by increasing muscle fibers and capillaries. This study demonstrated that muscle volume increased after dialysis exercise, as evidenced by the increased muscle area in the thighs. Notably, diabetic patients seemed to benefit more from dialysis exercise than non-diabetics. Although this study is preliminary due to its relatively small sample size, it suggests that intradialytic physical training may improve insulin utilization in muscle fiber cells, particularly in type II diabetic patients where insulin receptor function and signaling are altered. Further studies are needed to investigate the detailed mechanisms underlying the muscle hypertrophic effects of dialysis exercise. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=dialysis" title="dialysis">dialysis</a>, <a href="https://publications.waset.org/abstracts/search?q=excercise" title=" excercise"> excercise</a>, <a href="https://publications.waset.org/abstracts/search?q=muscle" title=" muscle"> muscle</a>, <a href="https://publications.waset.org/abstracts/search?q=hypertrophy" title=" hypertrophy"> hypertrophy</a>, <a href="https://publications.waset.org/abstracts/search?q=diabetes" title=" diabetes"> diabetes</a>, <a href="https://publications.waset.org/abstracts/search?q=insulin" title=" insulin"> insulin</a> </p> <a href="https://publications.waset.org/abstracts/191261/dialysis-rehabilitation-and-muscle-hypertrophy" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/191261.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">19</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">6</span> Efficient Passenger Counting in Public Transport Based on Machine Learning</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Chonlakorn%20Wiboonsiriruk">Chonlakorn Wiboonsiriruk</a>, <a href="https://publications.waset.org/abstracts/search?q=Ekachai%20Phaisangittisagul"> Ekachai Phaisangittisagul</a>, <a href="https://publications.waset.org/abstracts/search?q=Chadchai%20Srisurangkul"> Chadchai Srisurangkul</a>, <a href="https://publications.waset.org/abstracts/search?q=Itsuo%20Kumazawa"> Itsuo Kumazawa</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Public transportation is a crucial aspect of passenger transportation, with buses playing a vital role in the transportation service. Passenger counting is an essential tool for organizing and managing transportation services. However, manual counting is a tedious and time-consuming task, which is why computer vision algorithms are being utilized to make the process more efficient. In this study, different object detection algorithms combined with passenger tracking are investigated to compare passenger counting performance. The system employs the EfficientDet algorithm, which has demonstrated superior performance in terms of speed and accuracy. Our results show that the proposed system can accurately count passengers in varying conditions with an accuracy of 94%. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=computer%20vision" title="computer vision">computer vision</a>, <a href="https://publications.waset.org/abstracts/search?q=object%20detection" title=" object detection"> object detection</a>, <a href="https://publications.waset.org/abstracts/search?q=passenger%20counting" title=" passenger counting"> passenger counting</a>, <a href="https://publications.waset.org/abstracts/search?q=public%20transportation" title=" public transportation"> public transportation</a> </p> <a href="https://publications.waset.org/abstracts/167734/efficient-passenger-counting-in-public-transport-based-on-machine-learning" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/167734.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">154</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">5</span> Frequency- and Content-Based Tag Cloud Font Distribution Algorithm</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=%C3%81gnes%20Bog%C3%A1rdi-M%C3%A9sz%C3%B6ly">Ágnes Bogárdi-Mészöly</a>, <a href="https://publications.waset.org/abstracts/search?q=Takeshi%20Hashimoto"> Takeshi Hashimoto</a>, <a href="https://publications.waset.org/abstracts/search?q=Shohei%20Yokoyama"> Shohei Yokoyama</a>, <a href="https://publications.waset.org/abstracts/search?q=Hiroshi%20Ishikawa"> Hiroshi Ishikawa</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The spread of Web 2.0 has caused user-generated content explosion. Users can tag resources to describe and organize them. Tag clouds provide rough impression of relative importance of each tag within overall cloud in order to facilitate browsing among numerous tags and resources. The goal of our paper is to enrich visualization of tag clouds. A font distribution algorithm has been proposed to calculate a novel metric based on frequency and content, and to classify among classes from this metric based on power law distribution and percentages. The suggested algorithm has been validated and verified on the tag cloud of a real-world thesis portal. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=tag%20cloud" title="tag cloud">tag cloud</a>, <a href="https://publications.waset.org/abstracts/search?q=font%20distribution%20algorithm" title=" font distribution algorithm"> font distribution algorithm</a>, <a href="https://publications.waset.org/abstracts/search?q=frequency-based" title=" frequency-based"> frequency-based</a>, <a href="https://publications.waset.org/abstracts/search?q=content-based" title=" content-based"> content-based</a>, <a href="https://publications.waset.org/abstracts/search?q=power%20law" title=" power law"> power law</a> </p> <a href="https://publications.waset.org/abstracts/8529/frequency-and-content-based-tag-cloud-font-distribution-algorithm" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/8529.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">505</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">4</span> Analysis of the Performance of a Solar Water Heating System with Flat Collector</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Georgi%20Vendramin">Georgi Vendramin</a>, <a href="https://publications.waset.org/abstracts/search?q=Aurea%20L%C3%BAcia"> Aurea Lúcia</a>, <a href="https://publications.waset.org/abstracts/search?q=Yamamoto"> Yamamoto</a>, <a href="https://publications.waset.org/abstracts/search?q=Carlos%20Itsuo"> Carlos Itsuo</a>, <a href="https://publications.waset.org/abstracts/search?q=Camargo%20Nogueira"> Camargo Nogueira</a>, <a href="https://publications.waset.org/abstracts/search?q=Carlos%20Eduardo"> Carlos Eduardo</a>, <a href="https://publications.waset.org/abstracts/search?q=Lenz"> Lenz</a>, <a href="https://publications.waset.org/abstracts/search?q=Anderson%20Miguel"> Anderson Miguel</a>, <a href="https://publications.waset.org/abstracts/search?q=Souza%20Melegari"> Souza Melegari</a>, <a href="https://publications.waset.org/abstracts/search?q=Samuel%20N."> Samuel N.</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The thermal performance of a solar water heating with 1.00 m2 flat plate collectors in Cascavel-PR, is which presented in this article, paper presents the solution to leverage the marketing of solar heating systems through detailed constituent materials of the solar collector studies, these abundant materials in construction, such as expanded polyethylene, PVC, aluminum and glass tubes, mixing them with new materials to minimize loss of efficiency while decreasing its cost. The system was tested during months and the collector obtained maximum recorded temperature of outlet fluid of 55 °C, while the maximum temperature of the water at the bottom of the hot water tank was 35 °C. The average daily energy collected was 19 6 MJ/d; the energy supplied by the solar plate was 16.2 MJ/d; the loss in the feed pipe was 3.2 MJ/d; the solar fraction was 32.2%, the efficiency of the collector was 45.6% and the efficiency of the system was 37.8%. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=recycling%20materials" title="recycling materials">recycling materials</a>, <a href="https://publications.waset.org/abstracts/search?q=energy%20efficiency" title=" energy efficiency"> energy efficiency</a>, <a href="https://publications.waset.org/abstracts/search?q=solar%20collector" title=" solar collector"> solar collector</a>, <a href="https://publications.waset.org/abstracts/search?q=solar%20water%20heating%20system" title=" solar water heating system"> solar water heating system</a> </p> <a href="https://publications.waset.org/abstracts/18285/analysis-of-the-performance-of-a-solar-water-heating-system-with-flat-collector" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/18285.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">597</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">3</span> Evaluation of in vitro Inhibitory Effect of Enoxacin on Babesia and Theileria Parasites</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Mosaab%20A.%20Omar">Mosaab A. Omar</a>, <a href="https://publications.waset.org/abstracts/search?q=Mohammad%20Saleh%20Al-Aboody"> Mohammad Saleh Al-Aboody</a>, <a href="https://publications.waset.org/abstracts/search?q=Mohmed%20A.%20Rizk"> Mohmed A. Rizk</a>, <a href="https://publications.waset.org/abstracts/search?q=Shimaa%20M.%20Elsayed"> Shimaa M. Elsayed</a>, <a href="https://publications.waset.org/abstracts/search?q=Ahmed%20ElSify"> Ahmed ElSify</a>, <a href="https://publications.waset.org/abstracts/search?q=Naoaki%20Yokoyama"> Naoaki Yokoyama</a>, <a href="https://publications.waset.org/abstracts/search?q=Ikuo%20Igarashi"> Ikuo Igarashi </a> </p> <p class="card-text"><strong>Abstract:</strong></p> Enoxacin is a broad-spectrum 6-fluoronaphthyridinone antibacterial agent (fluoroquinolones) structurally related to nalidixic acid used mainly in the treatment of urinary tract infections and gonorrhea. Also, it has been shown recently that it may have cancer inhibiting effect. The primary antibabesial effect of Enoxacin is due to inhibition of DNA gyrase subunit A, and DNA topoisomerase. In the present study, enoxacin was tested as a potent inhibitor against the in vitro growth of bovine and equine Piroplasms. The in vitro growth of five Babesia species that were tested was significantly inhibited (P<0.05) by micromolar concentrations of enoxacin (IC50 values= 13.5, 7.2, 7.5, and 24.2 µM for Babesia bovis, Babesia bigemina, Babesia caballi, and Theileria equi, respectively). Enoxacin IC50 values for Babesia and Theileria parasites were satisfactory as the drug is a potent antibacterial drug with minimum side effects. Therefore, enoxacin might be used for the treatment of Babesiosis and Theileriosis especially in case of mixed infections with bacterial diseases or in the case of animal sensitivity against diminazin toxicity. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=enoxacin" title="enoxacin">enoxacin</a>, <a href="https://publications.waset.org/abstracts/search?q=Babesia" title=" Babesia"> Babesia</a>, <a href="https://publications.waset.org/abstracts/search?q=Theileria" title=" Theileria"> Theileria</a>, <a href="https://publications.waset.org/abstracts/search?q=IC50%20and%20dimenazin" title=" IC50 and dimenazin"> IC50 and dimenazin</a> </p> <a href="https://publications.waset.org/abstracts/24342/evaluation-of-in-vitro-inhibitory-effect-of-enoxacin-on-babesia-and-theileria-parasites" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/24342.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">468</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">2</span> Towards a Sustainable Energy Future: Method Used in Existing Buildings to Implement Sustainable Energy Technologies</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Georgi%20Vendramin">Georgi Vendramin</a>, <a href="https://publications.waset.org/abstracts/search?q=Aurea%20L%C3%BAcia"> Aurea Lúcia</a>, <a href="https://publications.waset.org/abstracts/search?q=Yamamoto"> Yamamoto</a>, <a href="https://publications.waset.org/abstracts/search?q=Carlos%20Itsuo"> Carlos Itsuo</a>, <a href="https://publications.waset.org/abstracts/search?q=Souza%20Melegari"> Souza Melegari</a>, <a href="https://publications.waset.org/abstracts/search?q=N.%20Samuel"> N. Samuel</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This article describes the development of a model that uses a method where openings are represented by single glass and double glass. The model is based on a healthy balance equations purely theoretical and empirical data. Simplified equations are derived through a synthesis of the measured data obtained from meteorological stations. The implementation of the model in a design tool integrated buildings is discussed in this article, to better punctuate the requirements of comfort and energy efficiency in architecture and engineering. Sustainability, energy efficiency, and the integration of alternative energy systems and concepts are beginning to be incorporated into designs for new buildings and renovations to existing buildings. Few means have existed to effectively validate the potential performance benefits of the design concepts. It was used a method of degree-days for an assessment of the energy performance of a building showed that the design of the architectural design should always be considered the materials used and the size of the openings. The energy performance was obtained through the model, considering the location of the building Central Park Shopping Mall, in the city of Cascavel - PR. Obtained climatic data of these locations and in a second step, it was obtained the coefficient of total heat loss in the building pre-established so evaluating the thermal comfort and energy performance. This means that the more openings in buildings in Cascavel – PR, installed to the east side, they may be higher because the glass added to the geometry of architectural spaces will cause the environment conserve energy. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=sustainable%20design" title="sustainable design">sustainable design</a>, <a href="https://publications.waset.org/abstracts/search?q=energy%20modeling" title=" energy modeling"> energy modeling</a>, <a href="https://publications.waset.org/abstracts/search?q=design%20validation" title=" design validation"> design validation</a>, <a href="https://publications.waset.org/abstracts/search?q=degree-days%20methods" title=" degree-days methods"> degree-days methods</a> </p> <a href="https://publications.waset.org/abstracts/11925/towards-a-sustainable-energy-future-method-used-in-existing-buildings-to-implement-sustainable-energy-technologies" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/11925.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">419</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">1</span> Microfacies Analysis, Depositional Environment, and Diagentic Process of the Antalo Limestone Successions in the Mekelle Outlier (Hagere-Selam, Messobo and Wukro Sections), Northern Ethiopia</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Werede%20Girmay%20Tesfasilasiea">Werede Girmay Tesfasilasiea</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Three stratigraphic sections of the Antalo Limestone successions in Mekelle Outlier, northern Ethiopia (at Hagere-Selam, Messobo, and Wukro sections) have been investigated to distinguish their microfacies features, reservoir characterization, and their equivalent depositional environments. The Antalo Limestone successions were deposited in the Mekelle Outlier during the Upper Jurassic period as a result of flooding of the area by the Tethys Ocean toward the southeast direction. This study is based on field description and petrographic analysis to determine the depositional environment, age, and reservoir characteristics of the carbonate units. According to petrographical studies of 100 thin sections and field investigation, 14 microfacies types are recognized. These are grouped into 4 microfacies association of a tidal flat (MFT1-2), lagoons (MFL1-2), shoal (MFS1-4), and open marine environment (MFO1-6). Hence, the Antalo limestone successions are deposited in shallow carbonate ramps with a wide lateral and vertical distribution of facies. The carbonate units in the studied sections are affected by bioturbation, micritization, cementation, dolomitization, dissolution, silicification, and compaction type of early diagenetic alteration. Dissolution and dolomitization affected the type of rock, showing good reservoir quality, while cementation and compaction affected the type of rock, resulting in poor reservoir quality in the Antalo Limestone successions of the Mekelle outlier. Based on the abundant distribution of the Alveosepta jaccardi (Schrodt), Pseudocyclammina lituus (Yokoyama), Kurnubia palestiniensis (Henson), and Somalirhynchia africana in the studied sections the Antalo Limestone successions assigned to the Late Oxfordian-Kimmeridgian age. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=Antelo%20limestone%20successions" title="Antelo limestone successions">Antelo limestone successions</a>, <a href="https://publications.waset.org/abstracts/search?q=depositional%20environment" title=" depositional environment"> depositional environment</a>, <a href="https://publications.waset.org/abstracts/search?q=Mekelle%20outlier" title=" Mekelle outlier"> Mekelle outlier</a>, <a href="https://publications.waset.org/abstracts/search?q=microfacies%20analysis" title=" microfacies analysis"> microfacies analysis</a>, <a href="https://publications.waset.org/abstracts/search?q=diagenesis" title=" diagenesis"> diagenesis</a>, <a href="https://publications.waset.org/abstracts/search?q=reservoir%20quality" title=" reservoir quality"> reservoir quality</a> </p> <a href="https://publications.waset.org/abstracts/186872/microfacies-analysis-depositional-environment-and-diagentic-process-of-the-antalo-limestone-successions-in-the-mekelle-outlier-hagere-selam-messobo-and-wukro-sections-northern-ethiopia" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/186872.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">54</span> </span> </div> </div> </div> </main> <footer> <div id="infolinks" class="pt-3 pb-2"> <div class="container"> <div style="background-color:#f5f5f5;" class="p-3"> <div class="row"> <div class="col-md-2"> <ul class="list-unstyled"> About <li><a href="https://waset.org/page/support">About Us</a></li> <li><a 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