http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Violation of DNA neighbor exclusion principle in RNA recognition
Yousuf, Muhammad,Youn, Il Seung,Yun, Jeonghun,Rasheed, Lubna,Valero, Rosendo,Shi, Genggongwo,Kim, Kwang S. Royal Society of Chemistry 2016 Chemical science Vol.7 No.6
<▼1><P>DNA intercalation has been very useful for engineering DNA-based functional materials.</P></▼1><▼2><P>DNA intercalation has been very useful for engineering DNA-based functional materials. It is generally expected that the intercalation phenomenon in RNA would be similar to that in DNA. Here we note that the neighbor-exclusion principle is violated in RNA by naphthalene-based cationic probes, in contrast to the fact that it is usually valid in DNA. All the intercalation structures are responsible for the fluorescence, where small naphthalene moieties are intercalated in between bases <I>via</I> π–π interactions. The structure is aided by hydrogen bonds between the cationic moieties and the ribose-phosphate backbone, which results in specific selectivity for RNA over DNA. This experimentally observed mechanism is supported by computationally reproducing the fluorescence and CD data. MD simulations confirm the unfolding of RNA due to the intercalation of probes. Elucidation of the mechanism of selective sensing for RNA over DNA would be highly beneficial for dynamical observation of RNA which is essential for studying its biological roles.</P></▼2>
Electromagnetic Performance of Five Phase Non-Overlapping Stator Wound Field Flux Switching Machine
Yousuf Muhammad,Khan Faisal,Ullah Basharat 대한전기학회 2022 Journal of Electrical Engineering & Technology Vol.17 No.1
The multi-phase wound fi eld fl ux switching (WFFS) machines achieved the advantages of the conventional FSPM machines and the common merits of multi-phase machines, e.g., low torque pulsations, high torque density and high fault tolerant capability. The non-overlapping windings can be used to minimize the consumption of copper and manufacturing costs for the WFFS machines. Hence, in this paper, fi ve phase WFFS machines having the non-overlapping winding topology with four diff erent rotor poles is presented. Ten slots with four diff erent rotor pole designs namely 10S-12P, 10S-11P, 10S-9P, and 10S8P are chosen to analyze the rotor pole study. The main section explains an essential overview of load and no-load analyses for fi ve Phase WFFS machines and designs with diff erent rotor poles are briefl y compared. The proposed machine design studies are analyzed with fi ve phase behavior of machine based on 2D-FEA. A detailed analysis of the proposed designs is also discussed like fl ux linkage, cogging torque, back EMF, THD, average torque versus current density, instantaneous torque, average torque versus stack length, copper losses, iron losses, effi ciency and inductance calculations. The simulated results elaborate that the design with 11 rotor poles is best as it produces better back emf, higher torque and effi ciency of 3.2 V, 1.65 Nm and 82.4% respectively.
Yousuf, Muhammad,Ahmed, Nisar,Shirinfar, Bahareh,Miriyala, Vijay Madhav,Youn, Il Seung,Kim, Kwang S. American Chemical Society 2014 ORGANIC LETTERS Vol.16 No.8
<P>Cationic cyclophanes with bridging and spacer groups possess well-organized semirigid cavities and are able to encapsulate and stabilize anionic species through diverse molecular interactions. We highlight the precise tuning of functionalized cyclophanes toward selective recognition of AMP, GTP, and pyrophosphate (PPi) using fluorescence, NMR spectroscopy, and density functional theory (DFT).</P><P><B>Graphic Abstract</B> <IMG SRC='http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/orlef7/2014/orlef7.2014.16.issue-8/ol500613y/production/images/medium/ol-2014-00613y_0006.gif'></P><P><A href='http://pubs.acs.org/doi/suppl/10.1021/ol500613y'>ACS Electronic Supporting Info</A></P>
P2P 시스템에서의 신뢰성 있는 라우팅을 위한 KTree의 설계 및 실험
Muhammad Irfan Yousuf,김수현 한국차세대컴퓨팅학회 2013 한국차세대컴퓨팅학회 논문지 Vol.9 No.4
본 논문은 P2P 시스템에서 분산 데이터 저장과 획득을 위한 신뢰성 있는 라우팅 방법인 KTree의 설계와 실험 평가를 다룬다. 많은 노드들이 시스템에 들어오고 나가는 상황에서도 KTree는 효율적인 라우팅을 가능하게 하여 자료 공유를 포함한 다양한 응용에 이상적인 선택이다. KTree에서 각각의 노드는 식별자 공간에 속하는 고유한 식별자를 갖는다. KTree는 식별자 공간을 층과 칸으로 나누고 각 칸마다 관리 노드를 정한다. 질의를 전달하기 위해서 각 노드는 다음 층의 일정한 숫자의 노드들과의 연결을 유지한다. 또한 시스템 전체에 대한 시야 확보를 위해서 각 노드는 꼭대기 층에 있는 노드와의 연결도 유지한다. 이러한 방법으로 KTree는 질의를 목적지까지 보내기 위해서 log(n) 개의 노드를 거치게 된다. 삽입 연산은 데이터를 여러 노드에 저장한다. 검색 연산은 이렇게 저장된 데이터를 효율적이고 안정적으로 되찾는다. PeerSim에 구현한 KTree의 시험적 구현을 통해서 신뢰성과 효율성을 확인할 수 있었다. 50,000 노드의 네트워크를 대상으로 한 실험 결과에서 노드들의 잦은 상태 변경에도 메시지를 잘 전달 할 수 있음을 확인할 수 있었다.
A Review on Degradation of Silicon Photovoltaic Modules
Hasnain Yousuf,Muhammad Quddamah Khokhar,Muhammad Aleem Zahid,Jaeun Kim,Youngkuk Kim,Sung Bae Cho,Young Hyun Cho,Eun-Chel Cho,Junsin Yi 한국신재생에너지학회 2021 신재생에너지 Vol.17 No.1
Photovoltaic (PV) panels are generally treated as the most dependable components of PV systems; therefore, investigations are necessary to understand and emphasize the degradation of PV cells. In almost all specific deprivation models, humidity and temperature are the two major factors that are responsible for PV module degradation. However, even if the degradation mode of a PV module is determined, it is challenging to research them in practice. Long-term response experiments should thus be conducted to investigate the influences of the incidence, rates of change, and different degradation methods of PV modules on energy production; such models can help avoid lengthy experiments to investigate the degradation of PV panels under actual working conditions. From the review, it was found that the degradation rate of PV modules in climates where the annual average ambient temperature remained low was -1.05% to -1.16% per year, and the degree of deterioration of PV modules in climates with high average annual ambient temperatures was -1.35% to -1.46% per year; however, PV manufacturers currently claim degradation rates of up to -0.5% per year.
Amin Muhammad,Yousuf Masarrat,Ahmad Naveed,Attaullah Mohammad,Ikram Muhammad,Zaid Attia A. Abou,Yaro Clement Ameh,Alshammari Eida M.,Binnaser Yaser S.,Batiha Gaber El-Saber,Buneri Islam Dad 한국독성학회 2022 Toxicological Research Vol.38 No.2
Organophosphates and synthetic pyrethroid insecticides have been commonly used in public health and agriculture. The present study aimed to evaluate the sub-lethal effects of organophosphates and synthetic pyrethroid insecticides on transaminases: glutamate oxaloacetate/aspartate transaminase (AST) and glutamate pyruvate/alanine transaminase (ALT) in Oreochromis niloticus. Fish were exposed to malathion (OP), chlorpyrifos (OP) and λ-cyhalothrin (synthetic pyrethroid) at sublethal concentrations of 1.425, 0.125 and 0.0039 ppm, respectively for 24 and 48 h. AST and ALT activities were shown to be remarkably (p < 0.05) decreased and increased, respectively in O. niloticus treated with the insecticides. The highest and lowest inhibition in AST level were noted as -12.2% and -12.2% in chlorpyrifos and λ-cyhalothrin 24 h treated fish samples, respectively. The highest and lowest elevation in ALT level were recorded as + 313% and 237% in 48 h chlorpyrifos and 24 h malathion treated fish samples, respectively. This indicates that the insecticides used in this study did not result in death but in changes in AST and ALT enzyme activities. Therefore, organophosphates (malathion, chlorpyrifos) and synthetic pyrethroid (λ-cyhalothrin) insecticides are toxic to fishes and could affects their survival in their natural habitat.
Research Publishing by Library and Information Science Scholars in Pakistan: A Bibliometric Analysis
Ali, Muhammad Yousuf,Richardson, Joanna Korea Institute of Science and Technology Informat 2016 Journal of Information Science Theory and Practice Vol.4 No.1
Scholarly communication plays a significant role in the development and dissemination of research outputs in library and information science (LIS). This study presents findings from a survey which examines the key attributes that characterize the publishing by Pakistani LIS scholars, i.e. academics and professionals, in national journals. A pilot-tested, electronic questionnaire was used to collect the data from the target population. 104 respondents (or 69.3% of target) provided feedback on areas such as number of articles published, number of citations, and the nature of any collaboration with other authors. The findings of this survey revealed that, among the various designated regions of Pakistan, the Punjab region was the most highly represented. In articles published in national journals, there was a clear preference among all respondents to collaborate with at least one other author. The citation metrics for LIS articles in national journals were relatively low (30.22%), which aligns with Scimago’s Journal and Country Rankings. The uptake of social scholarly networks mirrors international trends. Respondents were asked to score factors which could impact negatively on their ability to undertake research and/or publish the results. The study recommends that concerned stakeholders work together, as appropriate, to address concerns. In addition, it recommends that further research be undertaken to define patterns of Pakistani co-authorship in the social sciences.
A Review on Floating Photovoltaic Technology (FPVT)
Hasnain Yousuf,Muhammad Quddamah Khokhar,Muhammad Aleem Zahid,Jaeun Kim,김영국,조은철,조용현,이준신 한국태양광발전학회 2020 Current Photovoltaic Research Vol.8 No.3
A novel energy production system which has fascinated a wide consideration because of its several benefits that are called floating photovoltaic technology (FPVT). The FPVT system that helps to minimize the evaporation of water as well as an increase in energy production. For the research purposes, both electrical and mechanical structure requires studying of these systems for the development of FPVT power plants. From different points of views, numerous researches have been directed on FPVT systems that have evaluated these systems. The present research article give a logical investigation and up to date review that shows the different features and components of FPVT systems as an energy production system is offered. This articles reviewing the FPVT that gets the attention of the scientists who have the investigational stage and involuntary inspection of FPVT systems in addition to influence of implementing these systems on the water surface. Also, a comprehensive comparison has been constructed that shows the cons and pros of various types of solar systems that could be installed in various locations. In this review, it has been found that solar energy on the roof of a dwelling house generally has a power of 5 to 20 kW, while the inhabitants of commercial buildings generally have a power of 100 kW or more. The average power capacity of a floating solar panel is 11% more of the average capacity of a solar panel installed on the ground. Studies show that 40% of the water in open reservoirs is lost through evaporation. By covering only 30% of the water surface, evaporation can be reduced by 49%. The global solar panel market exceeds 100 GW and the capacity of 104 GW will bring the annual growth rate to 6%. In 2018, the world's total photovoltaic capacity reached 512 GW, an increase of 27% compared to the total capacity and about 55% of the renewable resources newly created that come from photovoltaic systems. It has been also predicted by this review that in 2025 the Solar technology including the FPVT system will increase by 7.38% that is 485.4 GW more of today installed power worldwide.