Multi Source Research Articles

Multi Source Bidirectional DC/DC Converter by Using PV-Wind-Battery based Integration for Domestic Applications

Multi Source Bidirectional DC/DC Converter by Using PV-Wind-Battery based Integration for Domestic Applications

Urban resilience assessment based on contradiction between supply and demand of the daily activity–environment system: A case study on Nanjing, China

In addition to safety and risk issues, urban resilience research should focus more comprehensive and universal contradictions. Considering the main contradictions of Chinese urban development, and the connotation of urban resilience, a theoretical framework is constructed based on the contradiction between supply and demand of the daily activity–environment system. Furthermore, an assessment index system of urban resilience is also developed that considers both volume and quality of demand and supply and has a grade standard. Finally, utilizing multi–source geographic big data, Nanjing is taken as a case study, the spatial characteristics and optimization path of urban resilience are identified. The main conclusions are as follows: (1) The activity–environment system resilience presents a “center–periphery” sprawling spatial structure, and it is mainly at the level of “reluctant resilience” and “almost lack of resilience”. (2) The evolution of the activity–environment system resilience is still absolutely volume driven, and the positive drive of relative quality is limited or even reversed. In addition, all the bilateral local spatial autocorrelations are generally represented as “center–periphery” separated spatial structures, but it is not always consistent with the overall trend. (3) For the governance of urban resilience, it is necessary to focus on common improvement and matching of absolute volume and relative quality in contents, orderly flow, accumulation and dispersion of supply and demand in ideas, and the strong support of new ideas and technologies in methods.

Modelling of plug-in hybrid electric vehicle (PHEV) with multi source

Abstract In this paper, we are discussing how to implement the efficiency of an Electrical Vehicle. Nowadays automobile’s are running by using gasoline as a fuel such as petrol, diesel, etc. By using this gasoline, the cost of the fuel is increasing and they release Chlorofluorocarbon (CFC). Because of these Chlorofluorocarbons (CFC), the atmosphere will be getting polluted. To overcome this problem we are moving into the vehicles which are consuming electrical energy as a fuel. The types of these vehicles are Electric Vehicle (EV), Hybrid Electric Vehicle (HEV), Plug-in- Hybrid Electric Vehicle (PHEV). The batteries used in these electric vehicles are Lead-acid battery, Nickel-Metal Hydride battery, Lithium-Ion battery, Ultracapacitors. This pollution can be controlled by using electric vehicles, and also at the same time the noise polluted by these vehicles is very less when compared to gasoline vehicles, and also they can drive with greater speed.

The Role of Tropical Cyclones on the Total Precipitation in Cuba during the Hurricane Season from 1980 to 2016

This study quantifies the amount of rainfall supplied by tropical cyclones (TCs) to Cuba. It uses the long–term global gridded Multi–Source Weighted–Ensemble Precipitation (MSWEP) v2 data set, with a resolution of 0.1° in latitude and longitude, and a temporal resolution of 3 h during the hurricane seasons from 1980–2016. During this study period, 146 TCs were identified within a 500–km radius of Cuba. The contribution of TCs to the total precipitation over Cuba during the cyclonic season was ~11%. The maximum contribution occurs in October and November, representing 18% and 28% of the total precipitation, respectively. The interannual precipitation contribution shows a positive correlation (~0.74) with the number of TCs, but without a significant trend for the period. A climatological spatial analysis of the rainfall associated with TCs revealed great heterogeneity, although the major contribution was observed along the southern coast of the eastern and central provinces of Cuba, and in the western province of Pinar del Río. No significant difference was observed between the number of TCs that affected Cuba and their rainfall contribution under the positive and negative phases of the El Niño Southern Oscillation. However, the negative phase of the NAO led to an increase in the genesis of TCs that later affected Cuba, which led to a greater contribution to precipitation compared to that obtained from TCs during the positive phase of this oscillation. Our results also confirm that anomalous warmth of the tropical Atlantic Ocean, revealed through the Atlantic Meridional Mode, and enlargement of the Atlantic Warm Pool, enhances the genesis in the North Atlantic Basin of the TCs that affect Cuba, which was associated with an increase of the rainfall contribution to the total precipitation compared to that calculated for TCs formed during the opposite phases.

Ratings of performance in multisource feedback: comparing performance theories of residents and nurses

BackgroundMultisource feedback (MSF) is increasingly being used to assess trainee performance, with different assessor groups fulfilling a crucial role in utility of assessment data. However, in health professions education, research on assessor behaviors in MSF is limited. When assessing trainee performance in work settings, assessors use multidimensional conceptualizations of what constitutes effective performance, also called personal performance theories, to distinguish between various behaviors and sub competencies., This may not only explain assessor variability in Multi Source Feedback, but also result in differing acceptance (and use) of assessment data for developmental purposes.The purpose of this study was to explore performance theories of various assessor groups (residents and nurses) when assessing performance of residents.MethodsA constructivist, inductive qualitative research approach and semi-structured interviews following MSF were used to explore performance theories of 14 nurses and 15 residents in the department of internal medicine at Aga Khan University (AKU).Inductive thematic content analysis of interview transcripts was used to identify and compare key dimensions in residents’ and nurses’ performance theories used in evaluation of resident performance.ResultsSeven major themes, reflecting key dimensions of assessors’ performance theories, emerged from the qualitative data, namely; communication skills, patient care, accessibility, teamwork skills, responsibility, medical knowledge and professional attitude. There were considerable overlaps, but also meaningful differences in the performance theories of residents and the nurses, especially with respect to accessibility, teamwork and medical knowledge.ConclusionResidents’ and nurses’ performance theories for assessing resident performance overlap to some extent, yet also show meaningful differences with respect to the performance dimensions they pay attention to or consider most important. In MSF, different assessor groups may therefore hold different performance theories, depending on their role. Our results further our understanding of assessor source effects in MSF. Implications of our findings are related to implementation of MSF, design of rating scales as well as interpretation and use of MSF data for selection and performance improvement.

Light sources selection for solar simulators: A review

Solar energy has certain limitations such as seasonal variations, cloudy weather etc. Because of these limitations, it is very difficult to perform the experiments in Rainy and winters seasons. To tackle this problem, we have to use solar simulators. It is source of artificial lights, very much similar to concentrated sunlight. It can be analyzed that increased demand in manufacturing and development of solar simulators for testing and simulation of solar photovoltaic and solar thermal energy utilization. This paper reviews the solar simulator light sources for testing photovoltaic panels as well as for thermal applications. Light intensity, cost, durability and stability were included as a criterion for comparing solar spectrum with lamp wavelength spectrum. The classification of solar simulator depend on the light source application and their technological innovations were considered according to the literature. Also, carbon arc lamp, argon lamp, high pressure sodium lamps, quartz tungsten halogen lamp, mercury xenon lamps, xenon arc lamps, metal halide lamps, LEDs and super continuum laser are discussed in details. Also, multi light source solar simulator discussed as a separate topic.

Automatic generation control of multi source interconnected power system using adaptive neuro-fuzzy inference system

LFC (Load Frequency Control) difficulty is created by load of power system variations. Extreme acceptable frequency distinction is ±0.5 Hz which is extremely intolerable. Here, LFC is observed by PID controller (PID-C), Fuzzy and ANFIS controller (ANFIS-C). To control different errors like frequency and area control error (ACE) in spite of occurrences of load disturbance and uncertainties of system is checked by MATLAB/SIMULINK software. Proposed Controller offers less, and small peak undershoot, speedy response to make final steady state. LFC is mandatory for reliability of large interconnected power system. LFC is used to regulate power output of generator within specified area to maintain system frequency and power interchange. Here, two area multi source LFC system is analyzed. ANFIS is utilized for tie-line power deviation and controlling frequency. Proposed controller is compared with other controller and it is found that proposed controller is better than other controller. Proposed controller is better in terms of Robustness. The output responses of interconnected areas have been compared on basis of peak-undershoot, peak-overshoot and settling time (Ts). Result of FLC is compared to that of with classical controller such as proportional derivative plus integral (PID) controller which suggests that conventional controller is slow.
 Keywords: LFC, Fuzzy, PID, ANFIS, LFC; FLC; ACE; PID-C, AGC.

Variety and standard arrangement of Yao medicine in Euphorbiaceae

The names, basic sources, medicinal parts, efficacy and standards of the medicinal materials in Euphorbiaceae were systematically collated and analyzed by the textual research for Yao medicine monographs in this paper. The results showed that there were great differences in the names, basic sources, medicinal parts and efficacy of some medicinal materials recorded in different literatures. There were 19 genera and 60 species(including varieties) of Euphorbiaceae of Yao medicine, involving 50 kinds of medicinal materials. Among them, there were 42 kinds of single basic sources medicine, 8 kinds of multi basic sources medicine, 28 kinds of root medicine, 26 kinds of whole plant medicine, 25 kinds of unique Yao medicine, accounting for 50%, 11 kinds of cross with Chinese medicinal materials, accounting for 22%. There were 21 kinds of Yao medicine standards at all levels, but only 1 kind of Laoban medicine and 2 kinds of Yao medicine standards. The Yao medicine in Euphorbiaceae could be named by means of transliteration of Yao language/Yao language transliteration/Chinese medicine name, Laoban medicine, plant morphology, medicinal properties, color and smell of medicine, while the medicinal parts and efficacy of the same medicinal name were different from those of traditional Chinese medicine. Therefore, the name and basic sources of the medicinal materials in Euphorbiaceae were not standardized, and the quality standard is not perfect. The above results provided a reference for the construction and improvement of quality standard system, the promotion of the production of medicinal materials and clinical medication standards, and the further development and utilization of Euphorbiaceae.

CFD analysis of hotspots copper metal foam flat heat pipe for electronic cooling applications

Hotspots have become one of the most limiting factors in the conception of more and more performing electronic chips. Although many wicking materials are used as porous media in used as porous media in flat plate heat pipe (FHP), copper metal foams are not well studied with these devices. In the present study, a three-dimensional FHPs with multi heat sources is investigated numerically using COMSOL Multiphysics. The potential use of copper metal foam as a wick structure is investigated. The effect of heat flux, as well as hotspot positions on heat pipe performance, is analyzed and results show that copper metal foam can be an alternative wick used for FHPs. Visualization is made taking into account the hot spot position effect at different heat flux. Results show that top hot spot positions especially close to the wall are the most critical locations where dry out can occur. Hot spot dimensions, as well as their distances and effective pore radius, have a significant effect on heat pipe operation.

Deviation of inverse square law based on Dunkl derivative: deformed Coulomb’s law

In this paper we consider the Coulomb’s law with deviation. We use the Dunkl derivative to derive the deformed Gauss law for the electric field and the electrostatic potentialwhich gives a new deformed electrostatics called a Dunkl-deformed electrostatics. Wemodify the Dunkl derivative for the electric field for multi sources or continuous chargedistribution. We discuss some examples of the Dunkl-deformed electrostatics.

The analysis of implementation of multy source based learning media to improve the elementary students’ critical thinking skills in solving addition and subtraction problems

This study aims to investigate the analysis of implementation of multy source based learning media to improve the elementary students’ critical thinking skills in solving addition and subtraction problems. This is caused by the lesson plans cannot motivate students to improve critical thinking skills. The method used in this study is a mixed method which is a combination of quantitative and qualitative methods. The research subjects were the sixth grade students of elementary school consisting of 32 students of experimental class and 32 students of the control class. The instruments of this research are an interview, a questionnaire, observation, and documentation. Quantitative method is applied to analyze the difference of student achievement result among two classes, while the qualitative method is applied to analyze the students' higher order thinking skills. The results show that there are significant differences between the two classes that applied multi source based learning media and conventional learning. The statistical result indicates that the (2-tailed) significance of the independent sample t-test in the pre-test was 0.000 or α ≤ 0.05. It implies that the implementation of multy source based learning media affects the students' critical thinking skills in solving addition and subtraction problems.

Fellowship of the Australian College of Rural & Remote Medicine (FACRRM) Assessment: a review of the first 12 years

This article was migrated. The article was marked as recommended. This paper provides an overview of the first 12 years of the formal assessment program of the Australian College of Rural and Remote Medicine (ACRRM). The ACRRM Fellowship represents the world's first and only Fellowship exam in Rural Medicine.The ACRRM assessment program is mapped to its Rural Generalist curriculum, based on the principles of programmatic assessment. ACRRM offers candidates the opportunity to participate in assessment in or close to their home location. The ACRRM Rural Generalist Curriculum defines the scope and standards for independent general practice anywhere in Australia, with a focus on rural and remote settings.The program was initially developed in 2006 and has evolved during delivery from 2008 onwards, utilising the following modalities: Multi Source Feedback (MSF)Multiple Choice Questions (MCQ)Mini Clinical Evaluation Exercise (Mini-CEX)Case Based Discussion (CBD)Procedural Skills LogbookStructured Assessment using Multiple Patient Scenarios (StAMPS) StAMPS is a unique examination, blending the formats of an Objective Structured Clinical Examination and a traditional viva vocè.The program has an emphasis on formative assessment. Over the past 12 years there has been considerable work in developing resources for candidates, governance structures and quality assurance processes.ACRRM's Fellowship requirements represent a customised bespoke assessment tailored to ACRRM's curriculum and the Australian rural and remote context. ACRRM's assessment program has grown substantially with 649 Fellowships being awarded from 2008 - 2019, with considerable experience gained in rural and remote assessment. It now represents a mature firmly-established process as a vocational endpoint in Rural and Remote Medicine.ACRRM has continued to offer its 'tele-assessment' program throughout the COVID-19 pandemic, with candidates and examiners participating in assessment by use of distance technology while remaining in or near their home community. This model may provide some insights for other medical Colleges and educational institutions facing challenges in the current environment.

Hybrid Energy Efficient Multi Source Energy System With Iot Base Load Control

As the demand for electricity increasing day by day there is a need for an alternative power generation from renewable energy sources. The usage of increasing these conventional energy sources and the irregular supply of the power generated by them create problems like stability, consistency, and quality of the power in the main electrical grid. The solution to this problem is the concept of hybrid energy-efficient multi-source energy systems.“Hybrid energy efficient multisource energy system includes two or more energy conversion devices or two or more fuels for the same device, that when integrated, overcome limitations that may be inherent in either”. Remote areas should be equipped with hybrid energy-efficient multi-source systems. This Project gives suitable ways to generate power in rural and agency areas also. The proposed system includes three systems that are capable of renewables, mainly solar (with the auto-tracking system), wind and Piezo along with power storage devices. This system has designed to give quality un-interrupted power to the developed Hybrid energy efficient multi-source energy systems. Further, this system is applied to maintain a continuous power supply for different loads like cooling and heating.

Effect of Electric Vehicle on Load Frequncy Control by Using SALP Swarm Algorithm Optimized FOPID

Now a days due to increasing participation of renewable sources in the production of energy there are more frequency fluctuations and this frequency instability is not possible to be controlled with load frequency control (LFC) alone. Meanwhile electric vehicles (EV) are gaining popularity to improve the frequency stability. In this paper multi area multi source power system with electrical vehicle by using Salp Swarm Algorithm (SSA) optimized Fractional order PID (FOPID) controller in the presence of EV is considered. The superiority of SSA is expressed by comparing with other algorithms like local unimodal sampling (LUS), differential algorithm (DE), teaching learning based algorithm (TLBO). Likewise FOPID controller is also compared with other controllers like I, PI, PID and the superiority of FOPID is demonstrated. The investigation reveal that SSA tuned FOPID controller provides the best dynamic performance for settling time and peak undershoot in deviation of frequency and deviation in the power of tie-line with EV.

Organizational justice and climate for inclusion

PurposeThis article examines a climate for inclusion through the lens of organizational justice. We argue that open interpersonal contacts, the fair treatment of gender-diverse employees, and inclusive decision-making processes in the promotion of equitable employment practices are foundational for shaping the climate for inclusion.Design/methodology/approachQualitative data were collected from multi sources: focus groups with female employees (N = 20) and interviews with male and female managers (N = 8).FindingsIn examining the similarities and differences between employees' and managers' perspectives, the findings revealed that, in all dimensions of a climate for inclusion, employees had more negative justice concerns than did managers, while managers and employees had similar views on some aspects of employment practices.Research limitations/implicationsThis study was conducted within one university setting; therefore, the findings may not be applicable to other industries.Practical implicationsThis study offers managerial implications that can be developed to promote the climate for inclusion in organizations.Social implicationsIn order to create a fair and equitable workplace, all employees should be able to actively participate in decision-making processes and share suggestions for contextualized and fair employment practices.Originality/valueDrawing the group-value model, this study advocates the importance of justice-based organizational practices in building an inclusive organization.

Analysis on net primary productivity change of forests and its multi–level driving mechanism – A case study in Changbai Mountains in Northeast China

It is significant to clarify the driving mechanism of the forest ecosystem changes at different scales in Northeast China with serious forest degradation. With Changbai Mountains in Northeast China as the study area, this study integrated multi–source data to explore the spatio–temporal changes of Net Primary Productivity (NPP) and its spatial agglomeration patterns, and probed its multi–level driving mechanism based on the Hierarchical Linear Model (HLM). The results showed the overall NPP in the study area had a gradual declining trend from southeast to northwest from 2001 to 2015. Besides, the ecological risk regions, including Low-Low (L–L) and High–Low (H–L) cluster types, expanded from 27.56% during 2001–2008 to 28.21% during 2008–2015, suggesting the local departments should focus on optimizing these regions and strengthen the construction of complex forests with large age differences to make the ecological environment healthier. In addition, results from the HLM suggested that key driving factors, e.g., the precipitation and vegetation coverage rate, had significant promoting effects on NPP at the grid scale. Whereas the soil organic matter content, distance to the highway, irrigation rate, percentage of the disaster area had significant inhibitory effects (p<0.01) on ecological environment at the watershed scale. Finally, the increase of the total investment in ecological engineering might directly promote the ecological recovery at the county scale. Those results could provide a reasonable scientific basis for the rational development and utilization of regional forest resources, and sustainable socio–economic development.

Abstraction and Control of Multi-Domain Disaggregated Optical Networks With OpenROADM Device Models

Network operators are evolving their optical transport networks in order to make them cost effective. In some scenarios, this means considering adopting software-defined networking principles along with open and standard interfaces, leveraging the underlying hardware programmability while, at the same time, considering the benefits of (partial) disaggregation, in view of the potential benefits of decoupling terminal devices from the line systems or of separating the hardware from the controlling software. In this evolution, operators often segment their networks into domains. Reasons include the need to scale, or confidentiality and/or vendor interoperability constraints. Additionally, the need to virtualize the (multi-domain) transport network has emerged as a key requirement to support functions such as network slicing and partitioning, and to empower end users to control their allocated partitions, enabling new business models related to multi-tenancy. In this context, several standards-defining organizations have been working on architectures, interfaces, and protocols to support requirements, such as the Abstraction and Control of Traffic Engineering Networks of the Internet Engineering Task Force, known as ACTN. In this article, we experimentally validate a control plane architecture for multi-domain disaggregated transport networks that relies on the deployment of network elements compliant with the OpenROADM multi source agreement device model. We demonstrate the abstraction and control of such networks in line with the ACTN framework and we show the applicability of the approach with a proof-of-concept testbed implementation.

Commutative encryption: an answer to privacy protected query processing of multi data sources

This paper proposes a privacy-preserving collaborative query service by a service provider for customer's information on demand by secured processing of multi-source data. The customer and the data sources are unknown to each other. The service provider acts as a bridge between them for servicing the query while preserving privacy. The privacy of a query is determined by the constants associated with its predicates. Protecting the privacy of queries is an extremely important consideration for individuals/agencies that like to receive query results but do not want to reveal the query text. The data owners, on the other hand, are apprehensive about the privacy of their data and therefore hesitate to spare with their data. Moreover, the customer needs not to know who the contributors to the data are and the data owners should be anonymous to the customer as well. We have provided a solution to this problem. Secure data exchange by commutative encryption is the basic cryptographic approach considered in this work.

Commutative encryption: an answer to privacy protected query processing of multi data sources

This paper proposes a privacy-preserving collaborative query service by a service provider for customer's information on demand by secured processing of multi-source data. The customer and the data sources are unknown to each other. The service provider acts as a bridge between them for servicing the query while preserving privacy. The privacy of a query is determined by the constants associated with its predicates. Protecting the privacy of queries is an extremely important consideration for individuals/agencies that like to receive query results but do not want to reveal the query text. The data owners, on the other hand, are apprehensive about the privacy of their data and therefore hesitate to spare with their data. Moreover, the customer needs not to know who the contributors to the data are and the data owners should be anonymous to the customer as well. We have provided a solution to this problem. Secure data exchange by commutative encryption is the basic cryptographic approach considered in this work.

Intelligent management of multi renewable energy sources using fuzzy logic control

Intelligent management of multi renewable energy sources using fuzzy logic control