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The Genomics of Liposarcoma: A Review and Commentary 脂肪肉瘤的基因组学研究综述与评述
Global Journal of Science Frontier Research Pub Date : 2022-12-28 DOI: 10.34257/gjsfrgvol22is2pg15
Hannah C. Beird, A. Lazar, Danh D. Truong
{"title":"The Genomics of Liposarcoma: A Review and Commentary","authors":"Hannah C. Beird, A. Lazar, Danh D. Truong","doi":"10.34257/gjsfrgvol22is2pg15","DOIUrl":"https://doi.org/10.34257/gjsfrgvol22is2pg15","url":null,"abstract":"Soft tissue sarcomas STS are malignancies that show mesenchymal and neuroectodermal differentiation and thus most often resemble supportive and connective tissue including fat blood vessels muscle bone tendons and nerves Over 70 subtypes of sarcomas exist and pathologists have classified these broadly according to the degree to which they resemble differentiated cell types Figure 1 1 This review will focus on the most common subset of STS in adults liposarcoma which are tumors with histological features of specialized fat cells Liposarcoma are broken down into several subtypes The four with the highest incidence are welldifferentiated liposarcoma WDLPS dedifferentiated liposarcoma DDLPS myxoid liposarcoma MLPS and pleomorphic liposarcoma PLPS 1 Overall survival is highest for MLPS followed by WDLPS and DDLPS and then PLPS2-4 Figure 2 While WDLPS occurs predominantly in the deep soft tissues of the limbs and retroperitoneum DDLPS is located mostly in the retroperitoneum MLPS and PLPS are preferentially located within the limbs5 Despite these broad categories liposarcoma can also have mixed phenotypes and is often further subdivided into even more rare entities with other ultra-rare features For instance pleomorphic MLPS has attributes of both PLPS and MLPS6,7.","PeriodicalId":12547,"journal":{"name":"Global Journal of Science Frontier Research","volume":"7 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-12-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89186170","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
Two-Stage Model of Silicate Glass Transition 硅酸盐玻璃化转变的两阶段模型
Global Journal of Science Frontier Research Pub Date : 2022-12-12 DOI: 10.34257/gjsfravol22is7pg1
Shangcong Cheng
{"title":"Two-Stage Model of Silicate Glass Transition","authors":"Shangcong Cheng","doi":"10.34257/gjsfravol22is7pg1","DOIUrl":"https://doi.org/10.34257/gjsfravol22is7pg1","url":null,"abstract":"After several decades of study, the nature of the glass state and glass transition remains controversial. This work describes a newly proposed two-stage model for silicate glass transition. The model recognizes that there is a cooling rate independent critical temperature Tc, separating two temperature regions. The coherent structures in the two regions change along different paths. All observed dynamic features in the glass transition result from structural rearrangements in the process. According to the proposed model, the silicate glass transition can be recognized as a second-order phase transition following an incomplete first-order phase transition. This work will first describe the two-stage model, and then apply the model to silica glass, as well as binary and ternary silicate glass transitions.","PeriodicalId":12547,"journal":{"name":"Global Journal of Science Frontier Research","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90721076","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
Noncommutative Quantum Gravity and Symmetry of Klein-Gordon Equation 非交换量子引力与Klein-Gordon方程的对称性
Global Journal of Science Frontier Research Pub Date : 2022-12-12 DOI: 10.34257/gjsfravol22is7pg19
Gangrok Lee
{"title":"Noncommutative Quantum Gravity and Symmetry of Klein-Gordon Equation","authors":"Gangrok Lee","doi":"10.34257/gjsfravol22is7pg19","DOIUrl":"https://doi.org/10.34257/gjsfravol22is7pg19","url":null,"abstract":"In the paper ’A New Approach to Quantum Gravity’[1], we suggest a new approach to quantum gravity. Using this theory, we can study the noncommutative gravitational field in momentum space. In this paper, we obtain the general form of the Klein-Gordon equation in noncommutative gravitational field. Then we find the symmetry associated with noncommutative gravity from the Klein-Gordon equation. We study black hole in momentum space and conclude that the event horizon of black holes is formed by the dipoles in momentum space with limit state.","PeriodicalId":12547,"journal":{"name":"Global Journal of Science Frontier Research","volume":"13 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85655073","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
Green Spaces in Sana’a Old City - Yemen between Past to Present 萨那老城的绿地——也门从过去到现在
Global Journal of Science Frontier Research Pub Date : 2022-11-30 DOI: 10.34257/gjsfrhvol22is7pg11
S. AlShawesh, Nada Ibraheem Al-Abyad
{"title":"Green Spaces in Sana’a Old City - Yemen between Past to Present","authors":"S. AlShawesh, Nada Ibraheem Al-Abyad","doi":"10.34257/gjsfrhvol22is7pg11","DOIUrl":"https://doi.org/10.34257/gjsfrhvol22is7pg11","url":null,"abstract":"The presence of nature was evident in the cities and villages of Yemen - a country located on the southern tip of the Arabian Peninsula - with a varied topography between mountains, plains, deserts, and islands. Formerly Yemen was given many names. For example, the Greeks and Romans called it \"Arabia Felix'', while Arab historians called it \"green Yemen” due to its fertility, greenness, and picturesque nature. Ancient Yemeni settled in good geographical areas with suitable natural conditions and practised agriculture. Despite the rugged terrain of the mountainous heights, he built agricultural terraces on the mountains and found irrigation systems, so he dug wells and built dams such as the Ma’arib dam.","PeriodicalId":12547,"journal":{"name":"Global Journal of Science Frontier Research","volume":"10 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84674199","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
Ecosystems in a State of Flux: Evidence from A Kenyan Coastal Riparian Ecosystem 处于变化状态的生态系统:来自肯尼亚沿海河岸生态系统的证据
Global Journal of Science Frontier Research Pub Date : 2022-11-30 DOI: 10.34257/gjsfrhvol22is7pg31
E. Maranga, Leila Ndalilo
{"title":"Ecosystems in a State of Flux: Evidence from A Kenyan Coastal Riparian Ecosystem","authors":"E. Maranga, Leila Ndalilo","doi":"10.34257/gjsfrhvol22is7pg31","DOIUrl":"https://doi.org/10.34257/gjsfrhvol22is7pg31","url":null,"abstract":"Riparian ecosystems are considered hotspots of carbon and nitrogen transformations. These biochemical transformations are driven by anthropogenic activities in the immediate riverine water catchments. The anthropogenic activities may include and not limited to extraction of goods such as agricultural products, wood products, honey, plant based pharmaceutical products, livestock products, firewood, water and grass for thatching homesteads. Riparian ecosystems also provide important tangible and intangible ecosystem services comprising spiritual and aesthetic functions, pollination, ecosystem detoxification functions, carbon and nitrogen sequestration and CO2 sinks for amelioration of climate change impacts among others. These ecosystems are increasingly threatened by degradation attributed to land use changes. Human perturbations such as crop farming on riparian land, overgrazing and population pressure on land resources influence degradation of riparian ecosystems, with profound effects on biodiversity conservation and local livelihoods. Evidence from the literature indicates that although there is a general understanding regarding the response of terrestrial and wetland ecosystems to human perturbations, there is a dearth of information on the response of African riparian ecosystems to ecologic and socio-economic impacts.","PeriodicalId":12547,"journal":{"name":"Global Journal of Science Frontier Research","volume":"125 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76012863","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
Gauge-Theoretic Study of Kundt Tube Experiment and Spontaneous Symmetry Transitions 昆特管实验和自发对称跃迁的规范理论研究
Global Journal of Science Frontier Research Pub Date : 2022-11-17 DOI: 10.34257/gjsfravol22is6pg61
T. Kambe
{"title":"Gauge-Theoretic Study of Kundt Tube Experiment and Spontaneous Symmetry Transitions","authors":"T. Kambe","doi":"10.34257/gjsfravol22is6pg61","DOIUrl":"https://doi.org/10.34257/gjsfravol22is6pg61","url":null,"abstract":"In the Kundt’s experiment of acoustic resonance in closed tubes, two characteristic lengths were observed: one is the wave-length of the sound waves in resonance and the other the scale of dust striation. The latter has remained unresolved for its formation mechanism. Based on the Fluid Gauge Theory proposed recently by the author, formation mechanism of the dust striation is studied. When the sound is weak enough, the striation is unobserved. Once the wave intensity exceeds a threshold value, dust striations are formed. Formation of the dust striation is understood as a spontaneous transition of symmetry in the acoustics. According to the Theory, there is a transition of stress field within the fluid flow. Whereas the stress field is isotropic before transition, it becomes anisotropic after the transition. This is analogous to the spontaneous symmetry breaking known in the field theory. Lagrangian structures of both systems are verified to be analogous either.","PeriodicalId":12547,"journal":{"name":"Global Journal of Science Frontier Research","volume":"70 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85117801","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
Active Control of Stick-Slip Torsional Vibrations of Drill-Strings using Non-Switching Sliding Mode Controller 基于非切换滑模控制器的钻柱粘滑扭振主动控制
Global Journal of Science Frontier Research Pub Date : 2022-11-17 DOI: 10.34257/gjsfravol22is6pg1
A. Baz
{"title":"Active Control of Stick-Slip Torsional Vibrations of Drill-Strings using Non-Switching Sliding Mode Controller","authors":"A. Baz","doi":"10.34257/gjsfravol22is6pg1","DOIUrl":"https://doi.org/10.34257/gjsfravol22is6pg1","url":null,"abstract":"Torsional vibrations of drill-strings are actively controlled using a non-switching sliding mode strategy. The controller is intended also to reject the effect of the interaction between the drill-bit and rock formation which induces non-linear stick-slip friction torque while tracking a desirable constant angular velocity of the drill-string. In order to demonstrate the merits of the proposed control algorithm, it is integrated with a simple two degrees-of-freedom model of the drill-string which is considered as a benchmark model for studying stick-slip induced torsional vibrations. Details of the development of the individual components making up the entire control action of the sliding mode controller (SMC) are presented. These components aim at rejecting the effect of the external disturbance of the stick-slip disturbance and tracking a reference angular velocity of the drill-string. Such development of the control action components is established using Lyapunov stability criterion. Numerical examples are presented to demonstrate the effectiveness of the SMC controller as influenced by the weight-on-bit (WOB), the drill-string rotational speed, and the main parameters of the controller. The stick-slip sensitivity (SSS) maps are developed to illustrate the performance characteristics of the active system for different operating conditions and important design parameters of the SMC. The presented active control approach is envisioned to present an invaluable and practical means for effectively mitigating the undesirable effects of stick-slip frictional disturbances on drill-stings.","PeriodicalId":12547,"journal":{"name":"Global Journal of Science Frontier Research","volume":"43 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83617043","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
A Semi-Empirical Model of Winter Wheat Grain Protein Content 冬小麦籽粒蛋白质含量的半经验模型
Global Journal of Science Frontier Research Pub Date : 2022-11-15 DOI: 10.34257/gjsfrcvol22is2pg1
Qian Wang, Cunjun Li, Yuanpi Huang, Wude Yang, Wen-jiang Huang, Ji‐Hua Wang
{"title":"A Semi-Empirical Model of Winter Wheat Grain Protein Content","authors":"Qian Wang, Cunjun Li, Yuanpi Huang, Wude Yang, Wen-jiang Huang, Ji‐Hua Wang","doi":"10.34257/gjsfrcvol22is2pg1","DOIUrl":"https://doi.org/10.34257/gjsfrcvol22is2pg1","url":null,"abstract":"Winter wheat grain protein content (GPC) is an important criterion for assessing grain quality. A timely and simple GPC model is urgently required for GPC prediction ahead of maturity. The GPC model included regressional models of dry matter and N accumulation and translocation for anthesis and post-anthesis stages, and incorporated both soil nitrogen (N) supply and meterological factors based on historical as well as current season data, final GPC were calculated as the ratio of N accumulation to dry matter in grain at maturity. This study conducted six field experiments during the 2003–2006 and 2008–2011 growing seasons to establish and validate the model. A three-way factorial arrangement of N fertilization, sowing date, and cultivar was conducted using a split-plot design. Critical growth parameters were determined by field measurements, and historical seasonal meteorological data covering the growing period were collected.","PeriodicalId":12547,"journal":{"name":"Global Journal of Science Frontier Research","volume":"84 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86586212","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
Ethno-Botanical Study at the Nabiganj Upazila of Habiganj District, Bangladesh 孟加拉国Habiganj地区Nabiganj Upazila的民族植物学研究
Global Journal of Science Frontier Research Pub Date : 2022-11-15 DOI: 10.34257/gjsfrcvol22is2pg17
Jontu Chandra Deb
{"title":"Ethno-Botanical Study at the Nabiganj Upazila of Habiganj District, Bangladesh","authors":"Jontu Chandra Deb","doi":"10.34257/gjsfrcvol22is2pg17","DOIUrl":"https://doi.org/10.34257/gjsfrcvol22is2pg17","url":null,"abstract":"Between August 2019 and October 2020, an ethnobotanical research was carried out to look at how the inhabitants of Nabiganj Upazila of Bangladesh's Habiganj district was noted. The information regarding the ethnobotanical data was obtained by interviewing residents of different age groups, most of them were in the 15 to 55 age range, including medicinal herbalists and hakims. The present paper reported that 68 medicinal plants belonging to 41 families, and 60 genera which have been proven to be helpful in the treatment of 78 diseases. Out of these plant species, 24 belonged to herbs, 27 trees, eight shrubs, and nine climbers. However, other parts of medicinal plants, including the stem, bark, latex, leaf bud, pulp, petiole, fruits, and rhizome, Seed, root, calyx, and peduncle were also shown to be helpful. For each species, scientific name, local name, habit, family, ailments to be treated, mode of treatment, and part(s) used are provided. Local residents of gathered data on medicinal plants, including Nabiganj Upazila of Habiganj district.","PeriodicalId":12547,"journal":{"name":"Global Journal of Science Frontier Research","volume":"22 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87998067","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
Long-Term Soil FertilityChangesFollowing Thermal Desorption to RemoveCrude Oil are Favorable to Revegetation Strategies 热解吸去除原油后土壤肥力的长期变化有利于植被恢复策略
Global Journal of Science Frontier Research Pub Date : 2022-11-07 DOI: 10.34257/gjsfrhvol22is6pg1
J. Mowrer, T. Provin, Steven M. Perkins
{"title":"Long-Term Soil FertilityChangesFollowing Thermal Desorption to RemoveCrude Oil are Favorable to Revegetation Strategies","authors":"J. Mowrer, T. Provin, Steven M. Perkins","doi":"10.34257/gjsfrhvol22is6pg1","DOIUrl":"https://doi.org/10.34257/gjsfrhvol22is6pg1","url":null,"abstract":"Heat treatment is effective for removing petroleum hydrocarbons from soil. However, high heat reduces the fertility of soils. This study determined the effect of temperature, and crude oil and salt additions on the fertility of four soils. Effects were assessed immediately after thermal treatment and following an equilibration/stabilization period. Soils were heated at four controlled temperatures (65, 300, 425, and 550°C) and also in an uncontrolled smoldering device, with 0 or 50 g kg-1oil added and with 3 levels of salt solution added (0, 1, or 3 ms cm-1). Soils were ‘rapidly weathered’ via wet/dry cycles at 37°C for five weeks. Initial changes in soil fertility were extreme enough to inhibit plant growth. Soil pH values were positively related to temperature, exceeding pH 8.5 at 550°C. The severity of changes was markedly reduced following incubations, showing that post heat treatment fertility will rebound with time and water.","PeriodicalId":12547,"journal":{"name":"Global Journal of Science Frontier Research","volume":"36 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81286443","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
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