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Preface For The Special Issue Of The Award Winners, Shi-Gang Sun

Journal of Electrochemistry

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The New Application Of Battery-Electrode Reaction: Decoupled Hydrogen Production In Water Electrolysis, Yuan-Yuan Ma, Zhao-Wei Guo, Yong-Gang Wang, Yong-Yao Xia

Journal of Electrochemistry

Hydrogen has been considered as a promising alternative to unsustainable fossil fuels because of its high calorific value, clean and abundant resources. Water electrolysis combined with renewable energy is regarded as the best way for hydrogen production, which will become the foundation of future hydrogen economy. For the past few years, many efforts have been employed to develop the cheap and high-performance catalyst for hydrogen evolution reaction and oxygen evolution reaction. However,the coupled hydrogen and oxygen evolution and the use of the expensive membrane have greatly restricted the flexibility of the conventional water electrolysis, and hindered the utilization of renewable …

Design Strategies Toward Highly Active Electrocatalysts For Oxygen Evolution Reaction, Tang Tang, Wen-Jie Jiang, Shuai Niu, Jin-Song Hu

Journal of Electrochemistry

Electrocatalytic water splitting is pivotal for efficient and economical production of hydrogen and oxygen gasses. However, the efficiency of the whole device is largely limited by the oxygen evolution reaction (OER) at the anode due to its sluggish kinetics. Thus, it is imperative to develop inexpensive, highly active OER catalysts to lower the reaction barriers. By examining the underlying critical factors for OER performance, this review outlines general principles for designing efficient nanosized OER catalysts, including (1) enhancing the intrinsic activity of active site by electronic modulation, crystallinity modulation, phase control, defect engineering and spin state engineering; (2) designing appropriate …

Research Progresses In Improvement For Low Temperature Performance Of Lithium-Ion Batteries, Yue-Ru Gu, Wei-Min Zhao, Chang-Hu Su, Chuan-Jun Luo, Zhong-Ru Zhang, Xu-Jin Xue, Yong Yang

Journal of Electrochemistry

Lithium-ion batteries (LIBs) have become a new research hotspot due to their high energy density and long service life. However, the temperature characteristics, especially the poor performance at low temperatures, have seriously limited their wider applications. In this report, the research progresses in the low temperature performance of LIBs are reviewed. The main existing limitations of LIBs at low temperatures were systematically analyzed, and followed by discussion on the recent improvements in low temperature performances by developing novel cathode, electrolyte, and anode materials. The developments for improving the low temperature performance of LIBs are prospected. The three most important factors …

Recent Process In Transition-Metal-Oxide Based Catalysts For Oxygen Reduction Reaction, Yao Wang, Zi-Dong Wei

Journal of Electrochemistry

Transition metal oxides (TMOs) based catalysts have become the most promising catalysts to be employed in anion exchange membrane fuel cell for the sluggish oxygen reduction reaction (ORR). However, their ORR activity is still far from that of the Pt-based catalysts. Therefore, it is important to develop high performance TMO based catalysts. Electrical conductivity and intrinsic activity have been regarded as the two keys to affect the ORR activity of the TMOs based catalysts. In this review, we focused on the recent progresses in the fundamental viewpoints on the electrical conductivity and intrinsic activity of the TMOs based ORR catalysts. …

Point Process Models For Quasi-Periodic Volcanic Earthquakes, Anastasia Ignatieva, Andrew F. Bell, Bruce J. Worton

Statistics in Volcanology

Low frequency or long period (LP) earthquakes are a common phenomenon at active volcanoes, and are ubiquitous at persistently active andesitic and dacitic subduction zone volcanoes. At these systems, LP earthquakes provide critical information regarding the state of volcanic unrest, and their occurrence rates are key data on which eruption forecasts are based. Point process modeling of volcanic earthquake occurrence allows potential insights into the underlying physical processes driving unrest, and quantitative, probabilistic, eruption forecasts, for example, through application of the Failure Forecast Method (FFM). However, unlike high-frequency volcano-tectonic (VT) earthquakes, which are typically random or clustered in time, LPs …

Use Composite Commutation Functions In Determining The Diffie-Hellman Keys, Faton Kabashi, Azir Jusufi

UBT International Conference

The Diffie-Hellman protocol was proposed by Whitfield Diffie and Martin Hellman. Diffie and Hellman wanted a mathematical function where encryption and decryption would not be important, ie �(�(�))=�(�(�)). Such functions exist, but most are two-way, ie finding inverse functions is easy work eg. such a function is � (�) = 2�.

A practical example of these functions is the electrical switch. However, these functions are not usable in cryptography. Important are the concrete forms of so-called one-way functions. These problem functions appear to find their inverse functions, which are found through complex procedures. So for a given � we can …

The Importance Of Cad/Cae Systems In Development Of Product Design And Process Of Optimization, Fatmir Azemi, Xhemajl Mehmeti, Bekim Maloku

UBT International Conference

Computer Aided Design (CAD) and Computer Aided Engineering (CAE) are the most important technology tools that today designers are using in development of product (design and in process of optimization). Thus, this study is carried out to present the importance of CAD/CAE system on process of design and process of optimization of spur gear. The paper presents the usage of CAD system for modeling parts and CAE software for analysis of stress-strain of spur gear and the results of calculation of pair spur-gears that it used in the gearbox transmission of the bucket wheel excavator located in “Bardhi i Madh …

Multithreading Technique Improvement In Processing Client Server Communication By Utilizing Object Oriented Language, Eda Tabaku, Kliv Shapllo, Senada Bushati

UBT International Conference

A comparison of an application’s performance, when a program is executed through multiple threads and only a thread to complete a specified task by using Java techniques. In this paper will be expounded how a Java programmer can profit by technology facilities. How to create a program that executes in a parallel way, that solves independent tasks not one after the other, but all at the same time. The application that is developed(the environment used is Eclipse) aims to speed up the time needed to download images from a specific website, but it is flexible for downloading images also from …

Performance Analysis Of Java Persistence Api Providers, Besart Pllana

UBT International Conference

Nowadays, fast and accurate access to data is very important. Usually data is managed and processed through software applications. In recent years, the most preferred programming model by most application developers is Object Oriented Programming (OOP) where data is represented through objects. These data must be persistent and therefore needs to be stored, and storage can be done on a variety of databases. The most common databases are Relational Database Management Systems (RDBMS). While persistence of objects in RDBMS is limited by object-relational mismatch which is the inconsistency of the direct interaction between two components based on different approaches, OOP …

The Moving Object Reflected Under Matlab Test-Bench (Simulation Model Through Buit-In Functions), Virtyt Lesha, Jozef Bushati, Dea Strica

UBT International Conference

Digital image processing is an area that finds many applications in three-dimensional graphics. One of the subjects considered in image processing is detection of moving objects. In this paper, we have analyzed the performance of an algorithm that detects a moving object. The performance relates to the speed of moving object during a pre-determined time interval. The methodology supports Matlab integrated with built-in functions. Specifically, as input of the simulation model is a video material containing moving objects. The model reads a video file presenting moving objects; after the model is executed in Matlab, the output emits moving objects associated …

Designing A Controller Via Simulated Annealing, Zemerart Asani, Selvet Rexhepi

UBT International Conference

With Proportional-Integral-Derivative (PID) controllers being widely used in industry for optimum solutions. Optimization of the PID controller is an important problem in Control Engineering. Therefore, in this paper work we have implemented Simulated Annealing to tune the controller parameters. Optimizing the controller parameters on the basis of the Simulated Annealing algorithm, based on criteria defined using an objective function, allows us to find optimal solutions for the controller parameters that give us minimum error. In terms of performance, the PID controller designed with Simulated Annealing gives us great results with regard to the rise time, settling time, overshoot and steady-state …

Nb-Iot: A Network Slice For Massive Iot, Xhafer Krasniqi

UBT International Conference

Network virtualisation is a concept that has been around for some time now, but the concept of network slicing is more recent and only started to be mentioned in the context of 5G. In essence, network slicing is a specific form of network virtualisation that enables sharing of physical resources by multiple logical network slices used to serve different applications and use cases. One such a use case would be to allocate network resources to small things, e.g. sensors and very low power consumption objects. To allow these small objects access to network resources or to a slice of such …

An Aplication Of Mcda Method To Evaluate And Select The Most Suitable Landfill Sites For Urban Waste. A Project Case Study For Berat County. Albania, Robert Kosova, Fabiana Cullhaj, Teuta Thanasi, Arben Reka, Taulant Jullolli, Gjergji Thanasi

UBT International Conference

Waste management system needs clear and strict management policy. They also need a process of evaluating and selecting the most appropriate landfill sites that respect the restrictions and constraints dictated by the presence of the population in that area, with respect to ecological ecosystems and other factors. In addition to the geographical and geological criteria and other specifications that are defined by traditional selection procedures, there are new factors adding to the old constraints and limitations. Urban waste is produced in large quantities in our cities, every year. As a result, the number of sites should increase with the population …

Review Of Cloud Migration Strategies And Providers – An Iaas Migration Strategy, Florinda Imeri, Agon Memeti

UBT International Conference

Companies are addressing the Cloud Computing issue more actively recently, as a part of a move towards a more agile and flexible IT infrastructure since benefitting from an IT infrastructure that is flexible, scalable, high-performance and up-to-date is no longer a luxury or the exception to a rule. The issue they address is “Which is the best strategy?” Of course, this is not a simple issue given that the cloud can impact an organization’s application picture across several dimensions. When an organizations made the decision to consider cloud services for its application or infrastructure deployment, it’s important to understand the …

Simulation Based Optimisation Of Ground Crews: Case Of A Regional Airport, Blaz Rodic, Alenka Baggia

UBT International Conference

Paper presents the simulation models built within an airport ground crew scheduling automatization project at a regional airport. Our goal was to develop robust ground crew task scheduling and shift generation algorithms that would improve on existing heuristic rules. We have utilized simulation modeling to develop and validate the algorithms, starting with a model of the existing scheduling process coded and visualized in spreadsheet software and ending with a hybrid Discrete Event and Agent Based model used for the visualization and verification of the optimized processes. Explicit and tacit expert knowledge was recorded through meetings with airport personnel managers and …

Finding The Early Talent: Factors Predicting Early Advanced Math Enrollment, Jessica Harris, Yasmin Ayala-Johnson, Elise Haylett, Tessa Jackson, Sydney Kopelic, Shawn Bergman

River Cities Industrial and Organizational Psychology Conference

Early exposure to advanced math classes have shown higher levels of college readiness for students. However, there is evidence of a discriminatory gap among students of marginalized backgrounds in placement of these advanced courses. To examine this, three years of data from approximately 10,500 student will be used to develop and validate predictive models that examines both enrollment and performance in advanced math courses in the eighth grade. Data will come from a longitudinal study taking place in rural North Carolina. This research will use the predictive models to determine which students will be selected for eighth grade advanced math …

An Implementation Of Weighted Least Squares Method In Central Bank Twitter Accounts Grew Prediction, Goran Bjelobaba, Ana Savic, Radosav Veselinovic, Hana Stefanovic

UBT International Conference

This paper presents some advantages of using social media and social networks as an efficient way of Central Banks communication with target audience. The statistics given in this paper presents some leading banks based on number of followers on Twitter in 2018, showing that Indonesia’s Central Bank has more Twitter followers than any other monetary authority, beating out the Banco de Mexico, Federal Reserve, European Central Bank and Reserve Bank of India. In this paper some prediction of number of Twitter followers in Central Bank communication is also contributed, based on Weighted Least Squares method. An algorithm is implemented in …

Efficiency Of Calculating Gcd Through Computer With Help Of Modified Euclidean Algorithm, Emin Emini, Azir Jusufi, Ruhada Emini

UBT International Conference

Euclid’s algorithm remains to be the most efficient method for finding greatest common divisor of two full numbers. By using the meaning of congruences this research paper will make a modification in the note of the Euclid’s algorithm. Here are discussed both classic and modified methods, by putting appropriate codes and observe the duration of the calculation through the computer.

Statistical Control Of Mutual Exchange Of Details (Tenon -Mortise ) From Beechwood, In Some Of Manufacturing Factories Of Chairs In Region Of Ferizaj, Blertë Sylejmani, Rrahim Sejdiu, Agron Bajraktari

UBT International Conference

Like every manufacturing industry, the wood industry also faces with many challenges. For responding to these challenges, companies need to improve constantly the quality of their products, by using scientific analysis and putting them into use. This study presents statistical process control of the elements of tenon and mortise, based on data analysis, obtained from production. On the basis of data processing, conclusions are given by regarding the possibility of cooperation of companies and their mutual exchange. Regular application of control charts, reduces defects and production costs, and keeps open possibilities for collaboration between enterprises, by exchanging certain parts (concrete …

Challenges Of Real Estate Appraisers In Kosovo, Marjan Ivezaj

UBT International Conference

Kosovo is a new country with a goal to integrate quickly into the large family of EU countries. To achieve this, old work practices are changing, and new practices are also being applied in different fields of human activity. Real estate property plays an important role in the process of economic development and is considered as sacred. To be treated this way, the property must be evaluated correctly. Following the examples of EU countries, the Kosovo institutions have organized training, testing and licensing of the first domestic real estate appraisers. The basic data to perform this profession are scarce, incomplete …

An Aplication Of Mcda Method To Evaluate And Select The Most Suitable Landfill Sites For Urban Waste. A Project Case Study For Berat County. Albania, Robert Kosova, Fabiana Cullhaj, Teuta Thanasi, Arben Reka, Taulant Kullolli, Gjergji Thanasi

UBT International Conference

Waste management system needs clear and strict management policy. They also need a process of evaluating and selecting the most appropriate landfill sites that respect the restrictions and constraints dictated by the presence of the population in that area, with respect to ecological ecosystems and other factors. In addition to the geographical and geological criteria and other specifications that are defined by traditional selection procedures, there are new factors adding to the old constraints and limitations. Urban waste is produced in large quantities in our cities, every year. As a result, the number of sites should increase with the population …

Does An(Y) Order Exist Within The Structural Art, Feti Selmani

UBT International Conference

Many authors have treated the beauty and aesthetics from the social and phylosofic point of view [Kant, Plato], whereas very few of them have meditated within the domain of Architecture let alone Structural Engineering [Leonhardt]. The Beautiful is beautiful, and the Ugly is ugly, but subjectivity apart, is any mean of defining a way or some Principles which can be of Guide for the designer. Is there any mathematics within the beauty, i.e., can the beauty be described in a mathematical way. It is a simple, yet a very difficult question answering, since both the beauty and aesthetics falls into …

Combining Cryptographic Primitives According To Security Metrics And Vulnerabilities In Real Systems, Blerina Çeliku, Rafail Prodani, Emis Simo

UBT International Conference

There are so many applications and data that flow during our daily activities, either personal or institutional ones. Also the companies and business do transactions or their real operations through the Web and other Internet facilities. Security breaches are costing individuals or companies millions so information security has to be a major priority. There are several forms of security technology available, but encryption is one that everyday computer users should know about. Encryption and the performance of cryptographic algorithms are variable according to implemented platforms, software and hardware components or application scenarios. According to specific security metrics and requirements we …

Technology Mediated Nudging In A Mobile Health Context, My Zetterholm, Päivi Jokela, Lina Nilsson

UBT International Conference

According to a vision for eHealth that was launched in 2016 by the Swedish Government, Sweden will be leading the way in using the potential of digitalization and eHealth to help people achieve a good and equal health. To achieve this vision, we argue that initiatives in eHealth need to augment the traditional health perspective. This implies a more preventive approach that transforms the health concept to a continuous participative process over the life course. A stronger emphasis is needed to develop high quality mobile and web based systems in order to empower people to pursue a healthy lifestyle. A …

Modeling The Effect Of Temperature On Rheological Properties Of Red Wine, Anisa Dhroso, Hasime Manaj, Ilirjan Malollari, Berisha Varvara

UBT International Conference

Wine is an alcoholic beverage produced through the partial or total fermentation of grapes. Wine is characterized by color: white, pink or rose, and red. Red wine available in Albanian market was characterized for physicochemical and rheological properties. In the first phase, the physicochemical parameters were determined: density, total acidity, volatile acids, content of the alcohol, reduced sugars, free SO2, total SO2, pH and electric conductivity. In the second phase of the study, density and dynamic viscosity were experimentally determined as a function of temperature from 5 to 40°C. Kinematic viscosity and fluidity were determined according to the definitions. The …

Vulnerability Assessment & Penetration Testing: Case Study On Web Application Security, Gazmend Krasniqi, Veton Bejtullahu

UBT International Conference

Complexity of information systems are increasing day by day. The security of information systems that are connected to public networks can be compromised by unauthorized, and usually anonymous, attempts to access them. By using public networks businesses and other institutions are exposed to numerous risks. This leads to more and more vulnerabilities in Information Systems. This situation calls for test methods that are devised from the attacker’s perspective to ensure that test conditions are as realistic as possible. In this paper we will describe complete stages of Vulnerability Assessment and Penetration Testing on some systems in UBT and proactive action …

Spectra Of One – And Two Photon Excited Luminescence Of Medical Drugsin Photon Traps, A.K. Kubanov, D.I. Semenov

Scientific Journal of Samarkand University

A technique for studying the photoluminescence spectra of pharmaceuticals (analgin, paracetamol) was developed for single- and two-photon excitation by a pulse-periodic laser. The technique is based on the fiber-optic recording of photoluminescence spectra using a small-size spectrometer, quartz light guides, and mini cavity cuvettes, which makes it possible to compare the analyzed spectrum with the spectrum of the reference substance.

On Negative Eigenvalues Of The Discrete Schrödinger Operator With Non-Local Potential, Sh.S. Lakaev, Z.E. Muminov

Scientific Journal of Samarkand University

On the d- dimensional lattice 2 , 1 ,  d d Z the discrete Schrödinger operator  H with non- local potential constructed via the Dirac delta function and shift operator is considered. The existence of negative eigenvalues on the parameters of the operator is explicity derived.

The Problem Of Restoring A Function In A Strip Along Curves With Singularities, А.Kh. Begmatov, A.S. Ismoilov

Scientific Journal of Samarkand University

In this work we consider the problem of re constructing a function from a family of parabolas in the upper half-plane with a weight function having a singularity. The uniqueness of theorem for the solution of equation is proved and the inversion formula is derived. It is shown that the solution of the problem posed is weakly ill -posed, that is, stability estimates are obtained in spaces of finite smoothness.