Demand-Driven Algorithm for Sharing and Distribution of Photovoltaic Power in a Small Local Area Grid

2014 ◽  
Vol 9 (1) ◽  
pp. 45-58 ◽  
Author(s):  
Mohammad Abu-Arqoub ◽  
Ghassan F. Issa ◽  
Ahmad F. Shubita ◽  
Abed Alkarim Banna
Keyword(s):  
Low Income ◽  
Power Distribution ◽  
Control Unit ◽  
Local Area ◽  
Power Sharing ◽  
Photovoltaic System ◽  
Efficient Manner ◽  
The Status ◽  
The Cost ◽  
And Control

The objective of installing a residential photovoltaic system is to cut the cost of the monthly electric bill. However, many homeowners, especially those with low-income, finds it difficult to invest in such systems because require substantial upfront investment. This paper presents a project called PSD-LAG(“Sharing and Distribution of Power-Local Area Grid”) which attempts to solve the issue of installation cost relying on the concept of power sharing and distribution. Thus two or more neighboring households can share the cost of installation, and accordingly share the generated electric power. A Demand-Driven algorithm is implemented and is embedded in a micro-processor based control unit, called “Intelligent Power Distribution and Control Unit (IPDC Unit)”, over sees the operation of the PSD-LAG system. It reads the status of generated power, power requirements for each home, power quota for each home, and accordingly controls a set of hardware devices to distribute the power in a most efficient manner based on usage and quota. At the core of the PSD-LAG is an Intelligent Power Distribution and Control Unit (IPDC Unit) that provides instantaneous monitoring, protection and control. It is an embedded Operating System that reads the status of generated power, power requirements for each home, power quota for each home, and accordingly controls a set of hardware devices to distribute the power in a most efficient manner based on usage and quota.

INTERACTION OF DOMINANT PARTY WITH ETHNIC GROUPS IN COMPETITIVE AUTHORITARIANISM IN MALAYSIA

2020 ◽  
Vol 14 (3) ◽  
pp. 107-113
Author(s):  
Tatiana Lavrova ◽  
Keyword(s):  
Ethnic Groups ◽  
Historical Context ◽  
The State ◽  
Power Sharing ◽  
Competitive Authoritarianism ◽  
Dominant Party ◽  
State Apparatus ◽  
The Status ◽  
The Stability ◽  
And Control

The author covers the question of the stability of competitive authoritarianism in Malaysia. In this case, such a regime is particularly stable, possibly due to the developed and institutionalized model of interaction between the dominant party and ethnic groups, implemented in the conditions of the polyethnic composition of the state. It was crucial to take into account the historical context of the British colonization of Malaysia, which had led to the influx of migrants, and the presence of a political party in power for 61 years, which was practically merged with the state apparatus and fully represented only one ethnic group. "Ethnic outbidding" implemented by the dominant party UMNO provided a numerically greater population with benefits in exchange for support of the ruling party. Simultaneously, the incorporation of ethnic groups into the state's political structure and the use of the power-sharing model allowed UMNO to act as an umbrella party and to maintain the status quo. The unspoken Treaty, first, was based on granting the privilege to the indigenous Malay population, and, second, protected the interests of non-Malays. Thus, granting bumiputera and non-Malays certain privileges, the establishment was able to consolidate a non-democratic regime and control over complex Malaysian society.

scholarly journals DWIFUNGSI RUAS JALAN PENGALIH TEBANGAN LEMBAK SEBAGAI KOLAM KONTROL DEBIT

2020 ◽  
Vol 1 (1) ◽  
pp. 731-7738
Author(s):  
Fahmi Syaifudin ◽  
Susilo Catur M
Keyword(s):  
Road Construction ◽  
Research Use ◽  
Technical Issue ◽  
Public Road ◽  
The Status ◽  
Mining Water ◽  
The Cost ◽  
Earthwork Volume ◽  
And Control ◽  
Road Segments

ABSTRAK Wilayah operasional Pit B/C PT Kaltim Prima Coal (KPC) area Bengalon terus melakukan ekspansi penambangan pada tahun 2019. Operasional pit akan memotong jalan umum dalam status Jalan Kabupaten penghubung desa Tebangan Lembak, Sepaso Barat dan kota kecamatan Bengalon. Salah satu ruas pemindahan jalan juga akan menjadi area tangkapan air limbah hasil operasional dumping Nakula Pit B/C yaitu pada titik penaatan kolam Kemuning. Penggunaan salah satu ruas jalan pengalih antara STA 2+100 – 2+375 untuk sekaligus dijadikan kolam kontrol debit menjadi opsi yang menarik mengingat potensi penghematan akan didapat perusahaan. Riset ini menggunakan metode pendekatan kuantitatif dengan menghitung dan membandingkan volume pekerjaan tanah terhadap dua kondisi berbeda. Perhitungan penghematan didapatkan dengan memakai harga kontrak yang telah ditetapkan untuk pekerjaan konstruksi jalan. Biaya tambahan yang mencakup faktor non-teknis juga dimasukkan dalam perhitungan biaya karena penggunaan jalan ini perlu mendapatkan izin dari Bupati Kutai Timur. Dapat disimpulkan bahwa dengan integrasi pembangunan jalan pengalih sekaligus sebagai kolam kontrol debit air limbah tambang, KPC menghemat biaya konstruksi sebesar 41% dari total biaya konstruksi infrastruktur Pit B/C. Kata kunci: Jalan pengalih, kontrol debit, titik penaatan.  ABSTRACT Operational area of Pit B/C PT Kaltim Prima Coal (KPC) continues to expand in 2019. Pit operation will cut public road with the status of connecting road between Tebangan Lembak village, West Sepaso and Bengalon sub-district. One of the re-alignment road segments will also be crossed by mining water flow from Nakula Dump activities at Pit B/C down to Kemuning Pond. Utilization those road segments between STA 2+100 to 2+375 to be control pond discharge shall be profitable for company. The research use quantitative approach by calculating and comparing earthwork volume for two different options. Saving calculation use the rate from approved contract for this road construction. Additional cost that covers non-technical issue also included in the calculation since utilization of road shall be approved by Bupati Kutai Timur. It is concluded that the integration of road and control pond discharge will save the cost for construction of Pit B/C KPC infrastructure by 41%. Keywords: Road re-alignment, discharge control, compliance point.  

scholarly journals Lessons learned from recent randomized controlled trials comparing the immunogenicity of different infant vaccination schedules of pneumococcal conjugate vaccine

F1000Research ◽  
2020 ◽  
Vol 9 ◽  
pp. 631
Author(s):  
Rachel C. Pieciak ◽  
Christopher J. Gill
Keyword(s):  
Immune Responses ◽  
Conjugate Vaccine ◽  
Low Income ◽  
Pneumococcal Conjugate Vaccine ◽  
Booster Dose ◽  
Geometric Mean ◽  
Lessons Learned ◽  
Low Income Countries ◽  
Efficient Manner ◽  
The Status

Background: The technically complex pneumococcal conjugate vaccine (PCV) is arguably one of the most important and widely studied vaccines since the Hib vaccine. Given the complexity of its design, the cost of administering the PCV is tremendous. While we cannot make adjustments to the vaccine itself post licensure, we can manipulate the dosing schedule. And yet little work has been done to understand the differences in immune responses across different dosing schedules. Methods: Accordingly, we conducted a review of three recently published randomized control trials that compared immune responses across commonly used vaccine schedules in both high- and low-income countries. Results: Each of these studies assessed how changes to the number of doses, spacing between doses and the use/timing of a booster dose affected ELISA geometric mean concentrations post-primary and post-booster dose. If the goal is to administer vaccinations in the most immunologically efficient manner as possible, evidence from these studies would suggest that several commonly used vaccine schedules are missing the mark. Conclusions: In order to deliver the most “bang for its buck”, PCV dosing schedules should not only leverage convenience but also immunological data. Without the reexamination of PCV schedules the status quo will remain inefficient, ineffective and needlessly expensive, threatening the sustainability of its implementation long-term.

scholarly journals Integration of the “smart home” concept into the infrastructure of the modern city

2019 ◽  
Vol 124 ◽  
pp. 05089
Author(s):  
I.V. Eliseev ◽  
B.M. Shifrin ◽  
M.A. Novikova ◽  
V.A. Sokolova
Keyword(s):  
Smart Home ◽  
Data Transfer ◽  
Local Area Networks ◽  
Main Idea ◽  
Local Area ◽  
Wireless Local Area Networks ◽  
Building Automation ◽  
Automation Systems ◽  
The Cost ◽  
And Control

Currently, the experience of implementing building automation systems shows that many leading manufacturers of equipment and software in this area are trying to develop their own protocols, standards and interfaces for data transfer and control at the lower level of interaction, which generally complicates and increases the cost of implementing projects using equipment and technologies of various manufacturers, and also lowers the level of security and fault tolerance of such systems. rThe main idea is to integrate various elements of a distributed system for managing the infrastructure of objects into a single network data transfer infrastructure using standards that describe the interaction in wired and wireless local area networks.

Demonstrating Nutrient Cost Gradients: A Brooklyn Case Study

2014 ◽  
Vol 84 (5-6) ◽  
pp. 244-251 ◽  
Author(s):  
Robert J. Karp ◽  
Gary Wong ◽  
Marguerite Orsi
Keyword(s):  
Low Income ◽  
Energy Content ◽  
Food Selection ◽  
The United States ◽  
United States Department ◽  
Micronutrient Deficiencies ◽  
Caloric Density ◽  
Low Income Families ◽  
The Cost ◽  
The Impact

Abstract. Introduction: Foods dense in micronutrients are generally more expensive than those with higher energy content. These cost-differentials may put low-income families at risk of diminished micronutrient intake. Objectives: We sought to determine differences in the cost for iron, folate, and choline in foods available for purchase in a low-income community when assessed for energy content and serving size. Methods: Sixty-nine foods listed in the menu plans provided by the United States Department of Agriculture (USDA) for low-income families were considered, in 10 domains. The cost and micronutrient content for-energy and per-serving of these foods were determined for the three micronutrients. Exact Kruskal-Wallis tests were used for comparisons of energy costs; Spearman rho tests for comparisons of micronutrient content. Ninety families were interviewed in a pediatric clinic to assess the impact of food cost on food selection. Results: Significant differences between domains were shown for energy density with both cost-for-energy (p < 0.001) and cost-per-serving (p < 0.05) comparisons. All three micronutrient contents were significantly correlated with cost-for-energy (p < 0.01). Both iron and choline contents were significantly correlated with cost-per-serving (p < 0.05). Of the 90 families, 38 (42 %) worried about food costs; 40 (44 %) had chosen foods of high caloric density in response to that fear, and 29 of 40 families experiencing both worry and making such food selection. Conclusion: Adjustments to USDA meal plans using cost-for-energy analysis showed differentials for both energy and micronutrients. These differentials were reduced using cost-per-serving analysis, but were not eliminated. A substantial proportion of low-income families are vulnerable to micronutrient deficiencies.

Efficacy of Ovsynch and Ovsynch Plus Protocol for Improvement of Fertility in Postpartum Sahiwal Cows

2019 ◽  
Vol 14 (04) ◽  
Author(s):  
J. P. Lakher ◽  
M. K. Awasthi ◽  
J. R. Khan ◽  
M. R. Poyam
Keyword(s):  
Fixed Time ◽  
Conception Rate ◽  
Control Group ◽  
Group Iii ◽  
Treatment Groups ◽  
Group I ◽  
Early Postpartum ◽  
The Status ◽  
Sahiwal Cows ◽  
And Control

The present study was conducted to investigate the efficacy of Ovsynch and Ovsynch plus protocol in postpartum (day 60) Sahiwal cows (n=18). Animals were randomly divided into three equal groups, viz., Ovsynch group Ovsynch plus group and Control group. Animals of group I (n = 6) were treated with traditional Ovsynch protocol. The animals (n = 6) of group II were treated with Ovsynch plus protocol which consisted of an initial intramuscular injection of eCG (Folligon) @ 250 IU on day 60 postpartum followed 3 days later by GPG (Ovsynch) protocol. In group-III Control, no treatment was given to animals (n = 6). Treated animals were inseminated at a fixed time between 14 and 20 hrs after second GnRH injection, irrespective of estrus detection. Blood samples were collected from each animal on days 50 and 60 postpartum to determine the status of cyclicity in animals based on serum concentrations of progesterone (P4). A third blood sample was collected on the day of prostaglandin treatment to determine the response of first GnRH injection. Four animals each were cyclic, and two were acyclic in both treatment groups. Four animals each responded to first GnRH treatment in both treatment groups. Similarly, two animals each got conceived giving conception rate of 50% (2/4) in each treatment. In the control group, one out of 6 animals got conceived yielding 16.66 % conception rate (1/6) during the study period. It may be thus concluded that Ovsynch and Ovsynch plus protocol may be used during the early postpartum period to improve the reproductive efficiency in postpartum Sahiwal cows.

Drug policy and control at the international level

2018 ◽  
Author(s):  
Thomas F. Babor ◽  
Jonathan Caulkins ◽  
Benedikt Fischer ◽  
David Foxcroft ◽  
Keith Humphreys ◽  
...  
Keyword(s):  
Low Income ◽  
Low Income Countries ◽  
Drug Control ◽  
Prescription Medications ◽  
Access To Treatment ◽  
Illicit Markets ◽  
Pain Medications ◽  
Almost All ◽  
And Control ◽  
Illicit Trafficking

International drug control efforts are designed to coordinate domestic laws with international activities that regulate or limit the supply of psychoactive substances. These efforts are organized around three main drug control treaties that almost all countries have ratified in order to prevent illicit trafficking and other drug-related crime, while at the same time allowing access to prescription medications. The effects of the system have been evaluated mostly in terms of the ability to eliminate illicit markets and supply. The gross imbalance in world consumption of legal opiates is a pointer to the limited availability of effective pain medications in many low-income countries, with 80% of the world’s population having either no or inadequate access to treatment for moderate or severe pain.

scholarly journals A METHODOLOGY TO SUPPORT COMPANIES IN THE FIRST STEPS TOWARDS DE-MANUFACTURING

2021 ◽  
Vol 1 ◽  
pp. 131-140
Author(s):  
Federica Cappelletti ◽  
Marta Rossi ◽  
Michele Germani ◽  
Mohammad Shadman Hanif
Keyword(s):  
Environmental Impact ◽  
End Of Life ◽  
Design Stage ◽  
Life Strategies ◽  
Disassembly Sequence ◽  
The Status ◽  
The Cost ◽  
Technical Solutions ◽  
First Time ◽  
Complex Activities

AbstractDe-manufacturing and re-manufacturing are fundamental technical solutions to efficiently recover value from post-use products. Disassembly in one of the most complex activities in de-manufacturing because i) the more manual it is the higher is its cost, ii) disassembly times are variable due to uncertainty of conditions of products reaching their EoL, and iii) because it is necessary to know which components to disassemble to balance the cost of disassembly. The paper proposes a methodology that finds ways of applications: it can be applied at the design stage to detect space for product design improvements, and it also represents a baseline from organizations approaching de-manufacturing for the first time. The methodology consists of four main steps, in which firstly targets components are identified, according to their environmental impact; secondly their disassembly sequence is qualitatively evaluated, and successively it is quantitatively determined via disassembly times, predicting also the status of the component at their End of Life. The aim of the methodology is reached at the fourth phase when alternative, eco-friendlier End of Life strategies are proposed, verified, and chosen.

scholarly journals Stochastic Expansion Planning of Various Energy Storage Technologies in Active Power Distribution Networks

2021 ◽  
Vol 13 (10) ◽  
pp. 5752
Author(s):  
Reza Sabzehgar ◽  
Diba Zia Amirhosseini ◽  
Saeed D. Manshadi ◽  
Poria Fajri
Keyword(s):  
Energy Storage ◽  
Power Distribution ◽  
Power Flow ◽  
Lithium Ion ◽  
Distribution Networks ◽  
Renewable Energy Resources ◽  
Flow Equations ◽  
Second Order Cone ◽  
Li Ion ◽  
The Cost

This work aims to minimize the cost of installing renewable energy resources (photovoltaic systems) as well as energy storage systems (batteries), in addition to the cost of operation over a period of 20 years, which will include the cost of operating the power grid and the charging and discharging of the batteries. To this end, we propose a long-term planning optimization and expansion framework for a smart distribution network. A second order cone programming (SOCP) algorithm is utilized in this work to model the power flow equations. The minimization is computed in accordance to the years (y), seasons (s), days of the week (d), time of the day (t), and different scenarios based on the usage of energy and its production (c). An IEEE 33-bus balanced distribution test bench is utilized to evaluate the performance, effectiveness, and reliability of the proposed optimization and forecasting model. The numerical studies are conducted on two of the highest performing batteries in the current market, i.e., Lithium-ion (Li-ion) and redox flow batteries (RFBs). In addition, the pros and cons of distributed Li-ion batteries are compared with centralized RFBs. The results are presented to showcase the economic profits of utilizing these battery technologies.

scholarly journals Comparison of Economical and Technical Photovoltaic Hosting Capacity Limits in Distribution Networks

Energies ◽  
2021 ◽  
Vol 14 (9) ◽  
pp. 2405
Author(s):  
Samar Fatima ◽  
Verner Püvi ◽  
Ammar Arshad ◽  
Mahdi Pourakbari-Kasmaei ◽  
Matti Lehtonen
Keyword(s):  
Power Distribution ◽  
Renewable Energy Sources ◽  
Distribution Networks ◽  
Power Distribution Networks ◽  
Network Losses ◽  
Network Costs ◽  
Cost And Benefit Analysis ◽  
Cost Parameters ◽  
The Cost ◽  
Pv Penetration

Power distribution networks are transitioning from passive towards active networks considering the incorporation of distributed generation. Traditional energy networks require possible system upgrades due to the exponential growth of non-conventional energy resources. Thus, the cost concerns of the electric utilities regarding financial models of renewable energy sources (RES) call for the cost and benefit analysis of the networks prone to unprecedented RES integration. This paper provides an evaluation of photovoltaic (PV) hosting capacity (HC) subject to economical constraint by a probabilistic analysis based on Monte Carlo (MC) simulations to consider the stochastic nature of loads. The losses carry significance in terms of cost parameters, and this article focuses on HC investigation in terms of losses and their associated cost. The network losses followed a U-shaped trajectory with increasing PV penetration in the distribution network. In the investigated case networks, increased PV penetration reduced network costs up to around 40%, defined as a ratio to the feeding secondary transformer rating. Above 40%, the losses started to increase again and at 76–87% level, the network costs were the same as in the base cases of no PVs. This point was defined as the economical PV HC of the network. In the case of networks, this level of PV penetration did not yet lead to violations of network technical limits.

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