Philippine Journal of Science最新文献_第4页

Determining Meteorological Parameters Influencing Photovoltaic Solar Energy Generation in Quezon City Using Machine Learning Algorithms 利用机器学习算法确定影响奎松市光伏太阳能发电的气象参数

Philippine Journal of Science Pub Date : 2023-06-30 DOI: 10.56899/152.s1.08

Lea Angela Saure, Joshua Quides, Raymond C. Ordinario, Rhenish C. Simon

引用次数: 0

Response of the Ionospheric Total Electron Content During St. Patrick's Day Geomagnetic Storm in 2015 over the Philippine-Taiwan Region 2015年菲律宾-台湾地区圣帕特里克节地磁风暴期间电离层总电子含量的响应

Philippine Journal of Science Pub Date : 2023-06-30 DOI: 10.56899/152.s1.06

Merlin M. Mendoza, E. Macalalad

{"title":"Response of the Ionospheric Total Electron Content During St. Patrick's Day Geomagnetic Storm in 2015 over the Philippine-Taiwan Region","authors":"Merlin M. Mendoza, E. Macalalad","doi":"10.56899/152.s1.06","DOIUrl":"https://doi.org/10.56899/152.s1.06","url":null,"abstract":"The ionospheric total electron content (TEC) response during the St. Patrick's Day geomagnetic storm of 2015 (max Kp = 8) is an interest of study in the field of space weather since it is the strongest geomagnetic storm of Solar Cycle 24. The cause of this storm is a coronal mass ejection (CME) from the Sun on 15 Mar 2015 recorded by SOHO/LASCO and arrived at ~ 05:00 UT 17 Mar 2015. The CME speed is estimated at ~ 668 km/s. At the initial phase of the storm, the disturbance storm time (Dst) index rose from 15 nanoteslas nT at 03:21–56 nT at 05:31 UT. The main phase of the storm caused the Dst index to drop to the minimum value of –223 nT from 05:31–22:33 UT on 17 Mar 2015. In the Philippine-Taiwan sector, TEC during the main phase was enhanced by ~ 25 TECU on 10 GNSS receiver stations and was depleted afterward with a maximum depletion of ~ 33 TECU on PBAS. The recovery phase showed a TEC depletion on all stations for the whole day. The minimum dTEC (differential TEC) is observed at PBAS (Basco, Batanes, Philippines), and the maximum percent depletion is observed at TWTF (Taoyuan, Taiwan) during the early hours of photoionization. Results from this study verified that GNSS TEC measurements along Asian sectors dropped significantly during St. Patrick's geomagnetic storm.","PeriodicalId":39096,"journal":{"name":"Philippine Journal of Science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74797866","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Machine Learning-based Prediction of the Likelihood of Colorectal Cancer Using miRNA Expression 基于机器学习的miRNA表达预测结直肠癌的可能性

Philippine Journal of Science Pub Date : 2023-06-27 DOI: 10.56899/152.04.12

Aamer Sultan, Aaron Austin de Asa, Tesah Mae Guimbangunan, Ezekiel Dmitri Serapio, Allan Fellizar, P. M. Albano, Rock Christian Tomas

{"title":"Machine Learning-based Prediction of the Likelihood of Colorectal Cancer Using miRNA Expression","authors":"Aamer Sultan, Aaron Austin de Asa, Tesah Mae Guimbangunan, Ezekiel Dmitri Serapio, Allan Fellizar, P. M. Albano, Rock Christian Tomas","doi":"10.56899/152.04.12","DOIUrl":"https://doi.org/10.56899/152.04.12","url":null,"abstract":"[Background] Colorectal cancer (CRC) comprises 10% of all cancer diagnoses, making it the third most diagnosed cancer globally. Despite its prevalence, most current methods for identifying CRC lack sensitivity and consistency while being invasive and costly. Thus, this study aimed to develop artificial neural network (ANN) models that could accurately detect CRC using miRNA expressions in tissue and plasma samples. [Methods] The study used miRNA expression profiles of formalin-fixed paraffin-embedded tissue and plasma samples obtained from CRC patients and healthy controls. ANNs were trained to discriminate between CRC patients from healthy controls using the relative expression of miR-21-5p, miR-196b-5p, miR- 135b-5p, miR-92a-3p, miR-29a-3p, and miR-197-3p in colorectal tissues and blood plasma. Multivariate logistic regression (MLR) and decision tree (DT) models were used to compare the performance of the ANN models. [Results] The ANNs achieved an accuracy of 98.5 and 88.2%, a sensitivity of 90.9 and 80.4%, a specificity of 92.6 and 84.7%, and an area under the ROC curve of 0.92 and 0.83 for the plasma and tissue samples, respectively. Moreover, sensitivity analysis of the ANN models showed that miR-135b-5p and miR-92a-3p had the greatest influence in distinguishing CRC from healthy plasma and malignant from neoplasm-free colorectal tissues, respectively. However, only miR-135b-5p was significantly downregulated in both CRC plasma and malignant colorectal tissue samples. Results from the MLR and DT models support the results from the ANN sensitivity analysis. [Conclusion] Our results show that the trained ANNs were able to accurately and confidently detect CRC using the considered six miRNA expression levels in colorectal tissue and plasma samples, providing an accurate, rapid, and less-invasive approach to diagnosing CRC.","PeriodicalId":39096,"journal":{"name":"Philippine Journal of Science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82825129","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Assess the prevalence and insecticide resistance of major dengue vectors Aedes SP. in selected locations of Batticaloa District 在Batticaloa区选定地点评估登革热主要媒介伊蚊的流行情况和抗药性

Philippine Journal of Science Pub Date : 2023-06-15 DOI: 10.4038/jsc.v14i5.57

J. Dilushi, M. Vinobaba, S. Surendran

引用次数: 0

Nutritional composition of three commercially important brackish water fish species recorded from Batticaloa Lagoon, Sri Lanka 斯里兰卡Batticaloa泻湖记录的三种商业上重要的咸淡水鱼类的营养成分

Philippine Journal of Science Pub Date : 2023-06-15 DOI: 10.4038/jsc.v14i5.58

M. W. F. A. Nazra, C. Devadasan

引用次数: 0

Ergasilid copepod infestation on some widely consumed fish species in Valaichchenai Lagoon, Batticaloa District, Sri Lanka 斯里兰卡Batticaloa地区Valaichchenai泻湖中一些广泛食用的鱼类的寄生线虫桡足类

Philippine Journal of Science Pub Date : 2023-06-15 DOI: 10.4038/jsc.v14i5.56

I. Sarmila, J. M. Harris, P. Vinobaba

引用次数: 0

Design and construction of a low cost coconut husk removing machine 低成本椰壳脱壳机的设计与制造

Philippine Journal of Science Pub Date : 2023-06-15 DOI: 10.4038/jsc.v14i5.55

M. Rizvi, P. Fernando, M. Yunestharan, T. Vikneswaran, M. G. H. Siriwardhana, K. M. U. M. Ketawala, S. Aynharan, H. A. Tharshanth, S. Sumantha

引用次数: 0

Characterization of micro-plastics in water and sediments in Batticaloa lagoon at Kattankudy Kattankudy Batticaloa泻湖水和沉积物中微塑料的表征

Philippine Journal of Science Pub Date : 2023-06-15 DOI: 10.4038/jsc.v14i5.53

A. Jahan, P. Vinobaba, A. Harris

引用次数: 0

Influence of Ipomoea pes-caprae Cover on the Density, Size, and Architecture of Ghost Crab (Ocypode sp.) Burrow in Sandy Beach Ecosystem 沙滩涂覆对鬼蟹(cypode sp.)洞穴密度、大小和结构的影响

Philippine Journal of Science Pub Date : 2023-06-15 DOI: 10.56899/152.04.10

R. Diamante, S. M. S. Santander‐de Leon

{"title":"Influence of Ipomoea pes-caprae Cover on the Density, Size, and Architecture of Ghost Crab (Ocypode sp.) Burrow in Sandy Beach Ecosystem","authors":"R. Diamante, S. M. S. Santander‐de Leon","doi":"10.56899/152.04.10","DOIUrl":"https://doi.org/10.56899/152.04.10","url":null,"abstract":"The sandy beach ecosystem is a vital ecological link between the sea and land through its various ecosystem services. This study determined the morphology and activity of ghost crab (Ocypode sp.) burrows in the ipomoea zone and exposed zone at three sites within the sandy beach ecosystem. Ghost crab burrow characteristics and activity were revealed to be influenced by the ipomoea cover. The density of burrows significantly varied based on increasing observations from the exposed zone to the ipomoea zone at all sites. Higher active burrows were observed at the ipomoea zone indicated by fresh sand or traces by individuals around the burrow openings. Burrow castings generated shapes resembling letters I, J, S, V, Y, and inverted Y. Burrow depths at the exposed zone appeared deeper than the ipomoea zone at all sites. The findings stressed the dynamic relationships of flora and fauna in sandy beach tropical ecosystems such as in the Philippines, highlighting the vegetation as an important component of beach habitat, as well as the need for equal attention and management of these often neglected ecosystems.","PeriodicalId":39096,"journal":{"name":"Philippine Journal of Science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73458839","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Synthesis and characterization of eco-friendly bio lubricants from plant-based oils 基于植物油的生态友好型生物润滑油的合成与表征

Philippine Journal of Science Pub Date : 2023-06-15 DOI: 10.4038/jsc.v14i5.54

P. G. T. Chamika, S. Arasaretnam, S. Premkumar

引用次数: 0