This paper exploits the performance of the particle swarm optimization (PSO) algorithm for a photovoltaic system under partial shading condition (PSC). Essentially our main contribution consists on analyzing the hyper-parameters adjustment of the PSO algorithm to determine the minimum particle numbers, such that the assertiveness to identify the Global Maximum Power Point (GMPP) be higher than 99%. The database was obtained throughout 5760 simulations based on different test cases. From these test cases, the PSC was applied in 2880 simulations. In the previous work, it was shown the best results based on 5 particles. In this update version, it is also shown the best results for 3, 7 and 9 particles, together with a comparison among them. Furthermore, this paper also presents the simulation results to evaluate the performance of the developed algorithm under transient- and steady-state conditions.

As a contribution for sustainability, electric vehicles (EVs) are seen as one of the most effective influences in the transport sector. This paper proposes an improved voltage control of the EV operating as uninterruptible power supply (UPS) in smart homes. With the EV plugged-in into the smart home, it can act as an off-line UPS protecting the electrical appliances from power grid outages. The foremost advantages of the proposed voltage control strategy are comprehensively emphasized, establishing a comparison with the classical approach. Aiming to offer a sinusoidal voltage for linear and nonlinear electrical appliances, a pulse width modulation with a multi-loop control scheme is used. A Kalman filter is used for decreasing significantly the time of detecting power outages and, consequently, the transition for the UPS mode. The computer simulations and the acquired experimental results validate the proposed strategy in different conditions of operation.

The power supply architecture of most AC electric railway vehicles is constituted by transformers and catenaries at increasingly high power levels. Inside the vehicles, the interface between the catenary and the DC-bus of the traction motors is based on a transformer and power electronics converters. A large part of these are AC-DC four quadrant converters that operate in parallel at relatively small switching frequencies. However, the use of the interleaving principle allows reaching a low harmonic distortion of the catenary current and imposing specific harmonic ranges in this current. Nevertheless, the current is not a pure sinusoidal wave and its harmonics can excite unwanted resonances due to the combined effect of the catenary distributed parameters, the substation equivalent impedance and the current frequency spectrum. This paper analyses this phenomenon and proposes a control strategy capable of minimizing the resonance effects in two different power supply architectures.

The progressive usage of the Internet of Things (IoT) and smartphone ubiquity is inducing attention, importance and interest in leveraging smartphones for deploying and running sophisticated mobile applications. Modern smartphones have good connectivity, a significant amount of processing, and are always with us, making them an ideal candidate for envisioned applications that can serve as a means of ensuring the safety and security of mankind. This research aims at developing a real-time audio encryption application between two or more handheld mobile devices, the communication between devices is made secure by encrypting the audio sent in real-time using Advanced Encryption Standard (AES) 256-bit encryption key while channelling message through a cloud-hosted database (Firebase) that works as a real-time database and performs implicit AES encryption and decryption on its data. Geocoder from the Google Map API library services is used to track the location of the audio sender.

The main of Small Business is business sector consists of trade, retail, services, processing, transportation, and industries. At present the use of e-commerce is very well known and becomes a necessity for society through electronic commerce; communication becomes faster and efficient. The objective of the study was to determine the implementation of e-commerce by Small Business in planning marketing strategies based on the Theory of Planned Behavior and economic motivation. This is based on the fact that each Small Business in Surabaya has the opportunity to expand marketing by implementing e-commerce. The feasibility of the model is based on the criteria of the goodness of fit model. The results of the study showed that the Theory of Planned Behavior and Economic Motivation could be partly applied to assess the behavior of small business actors in implementing e-commerce into business strategies

Student’s knowledge about the real economic condition is apprehensive. They do not understand the importance of understanding economic values based on the ideology of the nation. Students do not understand the economic value, which points to the mandate of the Constitution and the Nation’s ideology. The objective of this research was to analyze student’s assessment of teacher’s ability and knowledge, attitude and skill of students in the Economy of Indonesian-based Economy in order to development of economic books. The method of this research was a descriptive qualitative method. This research was conducted in six districts in East Java Province. Data collection methods used questionnaires and tests. The results showed that most students assessed their economic teachers as having a good mastery of the material, but the ability to manage and carry out economic learning was low. The test results of students' knowledge of economic problems are of concern. There is a gap between the learning experience that students receive and the subject matter of students' knowledge tests about economic problems. This provides information that basically about the implementation of economic education for high school students in this country is still not able to provide understanding and mastery of knowledge about problems and economics as should be idealized. This finding will influence the development of economic books and inform future interventions in economic education curriculum design.

This research was aimed to see the improvement of students’ mastery of the concept in learning by using Sequential Learning Style type which was done by combining online instruction and face to face as the supplementary learning. The data was taken from 30 students who took the Learning Material Development course in the Infor-mation and Technology Education Department of STKIP PGRI Tulungagung in semester four in 2016. This learning was done by using Personalization of Web-Based Learning of Sequential Learning Style Type in which Dokeos was chosen as the e-learning program. The data was collected by using a Likert scale of four categories, that is, excellent mastery, good mastery, fair mastery, and poor mastery. Based on the data collected from the respondents, it can be concluded that students’ level of mas-tery is high. 70% of the students stated that they have excellent mastery of the materi-al and 30% of the students stated that they have a good mastery of the material. It showed that this strategy could improve the concept of mastery in learning. The find-ing, therefore, can be used as the basis to develop a new strategy in the learning pro-cess by using web-based learning personalization

Waste is a common problem faced by any individual or society, either in the village or in the town. Most waste cases, done by removing the waste to a less strategic place, like in the rivers or illegal lands. This research was conducted to find out the model of waste management and the education in Margosaras waste bank that to improve society's welfare, referring to the Islamic economic development concept from Imam Al-Ghazali. The research uses a qualitative approach with descriptive methods and the data obtained from interviews and observations in the field. The results show, the model of waste management in Margosaras waste bank in Karanggondangan-Klaten has a management method which includes; planning, organizing, staffing, directing, controlling and evaluation, until the members of a waste bank have additional income. The education program has the effect of being aware of the economic value of waste and the craft from the waste. The social welfare of Karanggondangan-Klaten reviewed from the concept of Islamic economic development of Imam Al-Ghazali and achieved from five pods (religion, soul, intellect, descendants and wealth).

Continuous career development is the benchmark of employees in showing their performance optimally, on the other hand the workload of female workers makes them feel unsure of their competence to develop careers. This study aims to analyze the effect of workload of female workers on career development. The sample of this study was 250 female workers in the coral industry area of Surabaya with the classification of employees with income that was regional minimum wages. Data entered and can be processed are 248 female workers. The results of research data analysis show that workload has a significant positive direct effect on career development. Because it is necessary for companies to have career development programs that encourage employees to improve performance in work.

Fiduciary guarantee is one of the collaterals that are often used in society, especially in business activities. The primary function of the guarantee is to provide receivables security of creditors. Beneficiary Creditors of Fiduciary have positioned preferred and separatist creditors. However, in the practice of dispute often arises because of differences of interpretation as regards the legal consequences for Beneficiary Creditors of Fiduciary in bankruptcy of debtor. This study aims to reveal the evidence as well as provide analysis on legal consequences as well as lack of legal protection for creditors of the fiduciary guarantee in bankruptcy of the debtor. Theory and concepts that are used are the basic ideas of law, Rechtsvinding, justice, Progesif Law, Legal Protection, Agreements, Collateral, and bankruptcy. The results of the research showed that if the debtor bankrupt's creditors of the fiduciary recipient can do execute fiduciary guarantee object. It is set firmly in the fiduciary guarantee legislation. However in practice often arise problems if the debtor bankrupt, due to differences of interpretation especially if associated with Bankruptcy Law and debt repayment Obligations that determine the existence of waiting time for Creditors in performing execution of fiduciary guarantee object. As a result, it is often the beneficiary creditor of fiduciary less gets legal protection.