bluuebunny/crossref_metadata_2025 huggingface dataset:
Post crisis mega mergers and their effect on shareholders’ value
Authors: Evripidou Loukia
Published: March 2019

The current study examined the effect of post crisis mega mergers on shareholders’ value of the acquiring company. Twenty mergers have been evaluated covering all types of deals, vertical, horizontal as well as conglomerate mergers. The findings, in line with the relevant literature, indicate that the abnormal returns for the shareholders of the acquiring company are negative or neutral but in most case not statistically significant. Plausible explanation for the insignificance of the abnormal returns is the possibility of prior ownership of the purchased firm from the acquired one, or the differences in size between the two firms
The special purpose acquisition company (SPAC): Evidence of a new model for the development of the Italian SMEs
Authors: Provasi Roberta , Riva Patrizia Lucia Maria
Published: March 2019

The objective of this research is to illustrate how Special-purpose acquisition company (SPAC) can encourage Italian companies to use the Stock Market to accelerate their growth. Particularly, the study aims at underlining the characteristics that make the SPACs more suitable for the needs of small and medium-sized Italian companies so as to win the trust of financial investors so that they can guarantee a lasting success. The study underlines the main characteristics able to make the SPAC more useful so that is able to fit the needs of small and medium Italian companies.
Corporate governance in the German co-operative (eG)
Authors: Klappstein Verena
Published: March 2019

Though the legal form of the German registered co-operative (eingetragene Genossenschaft, abbreviated as eG) is a corporation it has a personal structure due to the particular purpose of the co-operative to meaningful engage in their member’s own (economic) needs resolving in the specific co-operative purpose (besonderer genossenschaftlicher Förderzweck), section 1 para 1 GenG. It is not only this specific so-operative purpose, but as well further principles of the eG (the member’s right to use the co-operative’s common collaborative facilities, or the principles of democracy, efficiency, the entrepreneurs’ and costumers’ identity, self-help, autonomous self-government or self-responsibility). These all influence eG’s governance structures. In the following paper, it will be shown that the by default three-tier structured eG is checked and balanced with regard to these specific principles. For this purpose, four aspects will be looked at: the regulations of the eG’s administration regarding its three-tier structure, the possible invalidations of the resolutions and decisions of these, the legal consequences following the violation of director’s duties, and, at last, the power that can be bestowed on special control bodies
Editorial: Search for the advanced practices in corporate governance
Authors: Kostyuk Alexander , Tutino Marco
Published: March 2019

The role of scholarly conferences can’t be underestimated. Conferences provide a platform for exchange of the ideas, even absolutely challenging. Besides that, the role of scholarly networking is absolutely important too from the point of view of international research and co-authorship. Finally, the role of screening the research contribution is performed by the conferences in an appropriate way. This conference “Corporate Governance: Search for the Advanced Practices” is a long story of relationships between Virtus Global Center for Corporate Governance (Ukraine) and Department of Business Studies (Roma Tre University, Italy). Both networks of scholars have been collaborated for many years in joint project performing functions of authors, reviewing, editors and conference organizers. Our networks are united by a joint field of research called “corporate governance”
Stochastic technique for solutions of non-linear fin equation arising in thermal equilibrium model
Authors: Ahmad Iftikhar , Qureshi Hina , Bilal Muhammad , Usman Muhammad
Published: March 2019

In this study, a stochastic numerical technique is used to investigate the numerical solution of heat transfer temperature distribution system using feed forward artificial neural networks. Mathematical model of fin equation is formulated with the help of artificial neural networks. The effect of the heat on a rectangular fin with thermal conductivity and temperature dependent internal heat generation is calculated through neural networks optimization with optimizers like active set technique, interior point technique, pattern search, genetic algorithm and a hybrid approach of pattern search - interior point technique, genetic algorithm - active set technique, genetic algorithm - interior point technique, and genetic algorithm - sequential quadratic programming with different selections of weights. The governing fin equation is transformed into an equivalent non-linear second order ODE. For this transformed ODE model we have performed several simulations to provide the justification of better convergence of results. Moreover, the effectiveness of the designed models is validated through a complete statistical analysis. This study reveals the importance of rectangular fins during the heat transformation through the system.
Investigation of parameters affecting the optimum thermal insulation thickness for buildings in hot and cold climates
Authors: Canbolat Ahmet , Bademlioglu Ali , Saka Kenan , Kaynakli Omer
Published: March 2019

This paper investigates the factors affecting the optimum insulation thickness and its pay-back period, such as heating and cooling energy requirements of building, lifetime, present worth factor, costs of insulation material and installation, costs of energy sources for heating and cooling, heating and cooling system efficiencies, and solar radiation. For this purpose, by considering two cities characterizing the hot and cold climatic conditions, the optimum insulation thickness and its pay-back period have been calculated and a detailed parametric analysis has been carried out. To achieve practical results, the ranges of the parameters considered in the study include the values typically reported in the literature. The variations in the optimum insulation thickness and the pay-back period with all parameters are presented in graphical form. Finally, order of importance and contribution ratios of the examined parameters on the optimum insulation thickness are determined with the help of Taguchi method. It is found that heating degree-days is the most efficient parameter on the optimum insulation thickness with an impact ratio of 27.33% of the total effect while the least efficient parameter is the efficiency of heating system with an impact ratio of 3.21%.
Comparative Analysis on The Market Share of Indonesian Export Commoties: Opportunities and Challenges
Authors: Wahyudi Setyo Tri , Maipita Indra
Published: March 2019

Indonesia is one of the largest exporting countries, mainly of food products and chemicals. However, its import-export data show that the high export value on chemical commodities and food product is followed by relatively high import value on those commodities. This study examines the comparative advantage of Indonesian export commodities. The analysis is conducted by mapping and analyzing the condition and the potential of Indonesian export market in various trading partner countries. In addition, this study identifies the potential, opportunities, and challenges that Indonesia will face to improve the market of its export commodities. The testing of comparative advantage is carried out using chemical commodities. RCA is a method that is used to analyze the competitiveness of Indonesian export commodities. The results of this study indicate that chemicals have a comparative advantage with the value of greater that 1 during 2012-2016, but the import of chemical raw materials also tends to be higher. Featured commodities are inseparable from challenges and obstacles, such as dependence on main export destination countries, economic crises, and relatively high import value of raw materials. However, the opportunity of Indonesia to increase the contribution of the export to national income is still wide open. Maximizing the potential of market diversification strategy that is implemented by Indonesian government is expected to increase the export of Indonesian commodities.
UJI FUNGSI PARU PADA ANAK SEKOLAH DASAR DI WILAYAH PABRIK BATU KAPUR DI DESA GARAWANGI KABUPATEN MAJALENGKA
Authors: Mulyatna Lili , Yustiani Yonik Meilawati , Dhamayantris Happy
Published: March 2019

Fungsi paru-paru manusia dapat menurun karena terpapar debu. Gangguan fungsi paru-paru umumnya terjadi karena adanya faktor individu dan faktor lingkungan. Penelitian ini dilakukan untuk mengetahui kondisi paru-paru anak di daerah sekitar pabrik batu kapur. Alat yang digunakan dalam penelitian ini adalah Peak Flow Meter sebagai pengukur uji fungsi paru. Selain itu dilakukan pulan pengukuran tinggi badan dan usia anak. Sebagai responden adalah murid-murid Sekolah Dasar Garawangi II, yang bertujuan mengetahui kondisi dan mengetahui faktor-faktor yang terkait dengan fungsi paru di sekitar pabrik batu kapur. Jumlah responden adalah 226 siswa. Berdasarkan hasil penelitian, dari 226 responden, 14 anak tidak sesuai sebagai responden, 100 (47%) anak yang memiliki kondisi paru-paru normal dan 112 (53%) anak didiagnosis dengan gangguan fungsi paru. Faktor yang terkait dengan hasil ini adalah usia, tinggi dan jenis kelamin. Terdapat faktor lain yang juga diteliti namun secara statistik tidak terhubung yaitu menjadi perokok pasif dan jarak rumah di dekat pabrik.
PERENCANAAN SARANA PENGOLAHAN AIR LIMBAH DOMESTIK BERBASIS MASYARAKAT DI DAERAH PESISIR (STUDI KASUS : DESA PURWOREJO, KECAMATAN BONANG, KABUPATEN DEMAK)
Authors: Wahyuni Sri , Mulyatna Lili , Qomariyah Linda
Published: March 2019

Desa Purworejo sebagai desa nelayan yang memiliki sarana pengolahan air limbah domestik minim. Permasalahan ini diperparah dengan kebiasaan sebagian besar penduduknya melakukan kegiatan buang air besar sembarangan. Hal ini, menunjukkan rendahnya pola hidup sehat dan bersih pada masyarakat.Perencanaan ini berguna untuk meningkatkan akses dan memenuhi kebutuhan masyarakat terhadap sarana pengolahan air limbah domestik di wilayah pesisir. Data primer yang dikumpulkan dengan survey dan penyebaran kuisioner digunakan untuk bahan pertimbangan pemilihan teknologi yang akan diterapkan.Teknologi yang dipilih untuk pengolahan air limbah adalah Tripikon-S diterapkan pada masyarakat yang rumahnya berdekatan dengan bibir pantai sebanyak 224 unit, tangki septik komunal untuk daerah yang berjauhan dari bibir pantai dan sebagian besar memiliki jamban sendiri sebanyak 147 unit, sedangkan untuk Mandi Cuci Kakus (MCK) ++ (ruang mandi 4 unit, ruang cuci 2 unit, ruang kakus 4 unit) dengan 2 unit Anaerobic Baffled Reactor untuk daerah yang tidak memiliki prasarana MCK, jarak tempat tinggal masyarakat yang berdekatan, dan luas lahan rumah yang relatif sangat kecil.
TATA BANGUNAN PADA JALAN DI.PANJAITAN DAN JALAN ALI MAKSUM DI YOGYAKARTA
Authors: Sanitha Onie Dian
Published: March 2019

Abstract: Building composition is tightly related with functions and activities of users, so it should be able to give expression and information through elements of building. The corridor of  DI. Panjaitan and Ali Maksum’s street has a historical value as special image of the city in Yogyakarta. The purpose of this research is to identify and evaluate the condition of building through the comparison the results through identification with rules of government regulation. Data will obtained through field observations and evaluated in accordance with Government direction to know detail the extent to which a building can be setup to follow government directives and the extent of D.I. Panjaitan and Ali Maksum’s street are capable of expressing the meaning of a historical road that traversed with imaginary axis.Keywords: Identification, evaluation, comparison, building composition, the expressionAbstraksi: Tata bangunan erat kaitannya dengan fungsi dan kegiatan pengguna, sehingga mampu memberi ekspresi dan informasi melalui elemen-elemen sebuah bangunan. Koridor Jalan D.I. Panjaitan dan Ali Maksum di Yogyakarta memiliki nilai historis sebagai pembentuk citra istimewa Kota Yogyakarta. Tujuan penelitian ini adalah mengidentifikasi dan mengevaluasi kondisi tata bangunan melalui perbandingan hasil identifikasi dengan aturan regulasi pemerintah. Data diperoleh melalui pengamatan lapangan dan dievaluasi sesuai dengan detail arahan pemerintah untuk mengetahui sejauh mana penataan bangunan dapat mengikuti arahan pemerintah dan sejauh mana koridor Jalan D.I. Panjaitan dan Ali Maksum mampu mengekspresikan makna historis sebuah jalan yang dilalui sumbu imajiner Yogyakarta.Kata Kunci: Identifikasi, evaluasi, perbandingan, tata bangunan, ekspresi
Selection of roller bearings of the shaft using the Inventor accelerator
Authors: Maciejczyk Andrzej
Published: March 2019

The article discussed the roller bearings selection of the shaft using the Inventor accelerator. The operation of the rolling bearing genera-tor is described. Calculation module of the generator is presented. The calculations made using calculation module, were verified by comparing them with the results of analytical calculations. The analysis of the proposed solution was carried out.
Theoretical analysis of coincidence phenomenon and critical frequency determination of acoustic isolation panels
Authors: Majkut Leszek
Published: March 2019

Critical and coincidence frequencies of panels are important in studying their behaviour under acoustic excitation Expressions for critical and coincidence frequencies of thin and thick homogeous isotropic panels are derived. Characteristics of critical frequency values in function of panel thickness for five different construction materials are shown.
Use of the air track to the vehicle collision simulation with an obstacle
Authors: Różański Stanisław
Published: March 2019

The article discusses some aspects of the analysis of road accidents involving vehicles. An air track was used to simulate collisions of the bodies in a laboratory scale. The CoachLabII+ and Cobra3 measuring console were used together with the software and sensors for detection and analysis of the body impact pulse with a fixed obstacle. The usefulness of the Kelvin model for the analysis of the impact processes was demonstrated.
Survey of publications by Polish authors in the field of moving loads on engineering structures
Authors: Szcześniak Wacław , Ataman Magdalena
Published: March 2019

The article concerns the discussion of a pneumatic tail lift entirely powered by pneumatic devices powered with compressed air from the brake system of truck. The authors try to set up the drive parameters and the size of the engines. For this purpose, a computer simulation of the platform's motion was made on the basis of which the torques of pneumatic engines were determined and the times of falling and lifting.
Yield condition and dissipation function for porous materials
Authors: Szwed Aleksander
Published: March 2019

A yield condition was proposed in this paper and associated dissipation function was derived via singular Legendre transformation. As a result, an explicit form of the dissipation function was obtained, which can be used for dual formulation of perfect plasticity model. The three-parameter yield condition enables continuous transition from the Drucker-Prager to Huber-Mises yield conditions by appropriate selection of free parameters. Calibration of the free parameters based on typical experimental tests was discussed. Based on the proposed yield function, a constitutive model of elastic-plastic material was given. The model can be used for modelling porous metals and other frictional materials.
Comparison of the surface of refrigeration compressor components operating under different operating conditions
Authors: Tyczewski Przemysław
Published: March 2019

The paper presents the results of testing the consumption of real plain bearings occurring in refrigeration compressors operating in various unfavorable working conditions. The tests were carried out on a test stand consisting of real refrigeration elements. Consumption analysis consisted in the comparison of surface roughness profiles after research trials under extreme operating conditions with new surfaces and working under normal conditions..
Characteristics of hydraulic systems used in vehicles other than machines at work
Authors: Wilczarska Joanna , Kuliś Ewa , Matuszewski Maciej
Published: March 2019

The efficient and reliable operation of the hydraulic systems and in particular the braking system of vehicles is the basis for their safe use. Hydraulic component wear processes are detrimental to the ability to perform tasks and requirements for these systems. It is therefore essential to carry out systematic control of the operation of all hydraulic systems and in particular of the braking system. Such checks. They are performed by diagnostic methods in service workshops as well as in periodical technical tests of vehicles. Hydraulic and brake testing methods depend on the purpose and design of the system, and the method of commissioning these mechanisms is essential. The scope and methods of diagnosing the actuators used are varied, while the efficiency and uniformity of these systems are assessed in the same way for all types of vehicles.
Lubricity additives for motor fuels
Authors: Wojtyniak Małgorzata , Olszewski Wiesław , Wronka Grzegorz
Published: March 2019

The paper describes the origin of insufficient lubricity properties of motor fuels, the essence of the problem and laboratory test methods applied to determine fuel lubricity. Ways applied by fuel industry to enhance lubricity are presented. There was also carried out a patent analysis concerning lubricity additives and fuel compositions. The anti-wear behaviour of lubricity enhancers, their types and possible undesirable effects were described.
Assessment of communication behavior of secondary schools and of students in Radom
Authors: Bandrowska-Kaim Agata , Dębowska-Mróz Marzenna , Repeć Renata
Published: March 2019

Understanding the specificity of communication behaviour of individual groups of participants of the transport system is one of the most important areas of interest of urban logistics. An important problem to be solved on this occasion is to indicate the most important factors and determinants that determine the manner of displacements. Determining how these conditions change depending on the age of people carrying out urban sprawl can be the starting point for the development of an appropriate organizational offer of the transport system in the city. One of the more numerous groups moving in cities are high school students and students. For this reason, the goal set for the implementation was to learn the specificity of communication behaviour of students and students. The decisive factors in the selection of displacements to and from school / university and other dis-placements performed in the urban space have been determined on the basis of a pilot survey carried out in Radom. The obtained results and their analysis are presented in this article.
The algorithm of an adaptive control system supporting the wheelchair's manual drive
Authors: Wieczorek Bartosz , Kukla Mateusz , Warguła Łukasz
Published: March 2019

The article discusses the concept of an adaptive algorithm controlling the electric system supporting the manual wheelchair drive. This algorithm is used in hybrid wheelchairs. According to the assumed concept, the system is equipped with three support modes in which the electric drive system reacts to changing environmental conditions.
Description of the inland waterway transport in Poland
Authors: Zielińska Edyta
Published: March 2019

This article defines the role of inland waterway transport in Poland over the years 2015-2017. It describes the demand for goods and passenger carriage by inland waterways and the transport performance provided by the means of river navigation. Furthermore, the size of inland waterways transport fleet and its age is assessed. The article also presents information about the structure of inland water-ways in our country and the major destinations in Polish inland navigation.
Rail transport in supply chains
Authors: Antonowicz Mirosław , Zielaskiewicz Henryk
Published: March 2019

The paper discusses the problem of competitiveness between the rail and road transport with reference to the EU policy for sustainable development of the transport branch. The paper presents the idea of complexity of services which facilitates the development of logistic networks. The authors formulate preliminary assumptions recommended for designing and construction of multimodal hubs. Further, they describe examples of European and Polish businesses which, thanks to the consolidation of services, widened their offer of logistic capabilities. The authors highlight the need for action aiming at the reversal of the unfavorable trend and increasing the cargo flow by rail, and not road. Finally, they discuss the necessity to reform the current freight transport by rail through the construction of comprehensive supply chains.
The simulation of production performance – a case study
Authors: Janisz Karina , Szczurek Izabela
Published: March 2019

The article presents the possibilities of using a computer simulation to analyze a selected production process. The research was carried out based on data from the plant producing shaft packages from ready glass molds. The simulation takes into account the availability of machines and the average repair time for individual machines. An exemplary model was presented and various organizational and logistic solutions were analyzed. The conducted simulations allowed for direct identification of areas of increased efficiency. The solution to the highest process efficiency was indicated.
Analysis of investment optimization in the scope of construction and extension of intermodal terminals
Authors: Kornaszewski Mieczysław , Zielaskiewicz Henryk
Published: March 2019

The article shows the analysis of dynamic growth in reference to intermodal transport in Poland against the technologically advanced European and world markets. The authors present the advantages and disadvantages regarding this type of transport. The paper pro-poses and characterizes a model for calculating intermodal terminal handling possibilities for various conditions of its operation as the terminal investments are very expensive. Their construction and extension is also associated with taking the investment risk.
Logistic activities of ship owners related to maritime piracy in the geopolitical and legal aspect
Authors: Łosiewicz Zbigniew , Łosiewicz Dominika , Łosiewicz Maja
Published: March 2019

The article discusses the activities of ship owners related to shipping on waters with sea piracy. The authors presented preventive actions and actions taken in the crisis situation of a pirate attack in the geopolitical and legal aspect. The effectiveness of these activities has been analyzed.
The shortest route search with ant algorithms
Authors: Świątnicki Zbigniew
Published: March 2019

The presented research results indicate the usefulness of ant algorithms in the optimization of the road length. Admittedly, ant algorithms do not guarantee an optimal solution, but they provide a suboptimal (rational) solution. In a situation where we have limited time to solve the optimization problem, the guarantee of terminating the algorithm and obtaining a rational, acceptable solution is an attractive alternative for conducting long-term calculations and finding a little better solution.
Transport of municipal waste on the example of a selected city of the Silesian agglomeration - part 1. Legal requirements and logistic strategies
Authors: Witkiewicz Anna , Czech Renata , Zabochnicka-Świątek Magdalena , Czech Piotr , Turoń Katarzyna
Published: March 2019

The article presents the issues related to the transport of municipal waste. The legal requirements relating to waste transport, a list of necessary documentation for conducting this type of activity and the required marking of vehicles are discussed. Logistics strategies related to the activities aimed at the implementation of municipal waste collection from the example of the city residents were also shown, allowing to limit the costs associated with this activity. De-scribed are waste collection systems and the most frequently used transport systems based on the criterion of the number of means of transport used for waste disposal. The article also contains information on the means of transport used. Finally, the costs of the example company for the means of transport used to collect municipal waste were analysed and factors important for the formation of these costs were presented. The article has been divided into two separate parts.
Tariff systems in public transport in selected cities
Authors: Dębowska-Mróz Marzenna , Ferensztajn-Galardos Ewa , Krajewska Renata , Rogowski Andrzej
Published: March 2019

Prices for transport services in urban public transport are an element of transport policy and are subject to regulations. The price list for public transport trips results from the Act on public transport and is determined by the territorial self-government. The article analyzes the tariff systems introduced by the authorities of selected cities. These cities are: Radom, Czestochowa, Kielce and Bydgoszcz.
The hub- and- spoke: Central Airport Project
Authors: Kowalska-Napora Ewa
Published: March 2019

This paper presents the consideration of proper interpretation of hub-and- spoke structure for the example: Central Airport Project. The hub- and- spoke paradigm is a form of transport topology optimization in which traffic routes are organized as a series of „spokes” that connect outlying points to a central „hub”.
Possibility of application hybrid solutions for improving SAIDI coefficient in medium voltage lines
Authors: Saniawa Dionizy , Ostapiuk Eryk , Hebda Kamil , Bandrowska-Kaim Agata
Published: March 2019

The purpose of this work is to analyze the indicator of the duration of interruptions in the supply of electricity SAIDI (System Average Interupption Duration Index) given by power distribution operators (DSOs). The topic is so important for the Polish economy that it can be treated as a social problem that can not only reduce the quality of life, but also the economic development of small towns and villages where power outages are much longer than in cities. However, at the same time investment activities aimed at improving the quality of electricity distribution in Poland represent a very high chance for the development of new innovative technologies. The article presents not only related aspects with medium voltage network automation, but also due to their technical and economic capabilities, modern devices. The key in the article is the effective solution to the problem of reliability in Poland and the presentation of selected directions of investment.
Revisión crítica de «Las edades de Lulú», de Almudena Grandes: Para una nueva interpretación como Bildungsroman
Authors: Laín Corona Guillermo
Published: March 2019

Las edades de Lulú (1989), primera novela de Almudena Grandes, ha sido también una de las primeras obras de su trayectoria literaria en suscitar el interés de la crítica académica. Habitualmente, el foco se ha puesto sobre las cuestiones de género, y, aunque se ha hablado de su naturaleza narrativa como Bildungsroman, este aspecto ha quedado arrinconado por el debate en torno al machismo o feminismo de la historia narrada. Aquí, se hace una revisión de este debate, ajustándolo a las ideas literarias de Almudena Grandes y sus propias reflexiones en torno a Las edades de Lulú. Asimismo, se propone una nueva interpretación como Bildungsroman, de tipo narratológico y en comparación con el modelo remoto de la picaresca y, en concreto, el Lazarillo de Tormes. Este análisis permite abordar la cuestión de género en la novela de una manera más rigurosa, derivada del texto mismo.
Reproducing Kernels of Weight Square-Summable Sequences Hilbert Spaces
Authors: Żynda Tomasz Łukasz
Published: March 2019

In this paper we will introduce the concept of weighted reproducing kernel of l
2(ℂ) space, in similiar way as it is done in case of weighted reproducing kernel of Bergman space. We will give an explicit formula for it and prove that it depends analytically on weight. In addition, we will show some theorems about dependance of l
2(ℂ) space on weight.
Quince (Cydonia oblonga Mill.) as a useful source of antioxidants – antioxidant activity evaluation
Authors: Muzykiewicz Anna , Zielonka-Brzezicka Joanna , Klimowicz Adam
Published: March 2019

Introduction: Quince (Cydonia oblonga Mill.) is a plant of which both the fruits and the leaves are sources of compounds with antioxidant potential. Such activity could be helpful to prevent the development of so-called oxidative stress.

Objective: The aim of the study was to evaluate the antioxidant properties of ethanolic, methanolic and acetonic extracts of mature and immature quince fruits, as well as leaves.

Methods: The extracts were prepared using ultrasound-assisted extraction, for 15, 30 and 60 minutes. The antioxidant activity was assessed by DPPH, FRAP, ABTS and Folin-Ciocalteu (F-C) methods.

Results: Antioxidant activity of all of the evaluated extracts were observed. The highest potential determined with each method was found for leaf extracts. Moreover, higher activity of unripe fruit extracts compared to ripe fruit was observed. Taking into account the applied extractants, the highest antioxidant capacity was found for methanolic extracts, extracted for 60 and 30 minutes. By contrast, the lowest potential was observed mainly for ethanolic extracts (extraction time 15 minutes).

Conclusion: Quince extracts, particularly alcoholic extracts of leaves, seem to be a valuable source of anti-oxidants. Factors as extraction time, the type of solvent and degree of fruit maturity may influence the antioxidant activity of extracts.
Structural and optical properties of Dy3+ doped Sr2SiO4 phosphors
Authors: Verma Durga , Patel R.P. , Verma Mohan L.
Published: March 2019

Dysprosium doped strontium silicate phosphor namely (Sr2SiO4:Dy3+) was prepared by low-temperature solution combustion method using urea (CO(NH2)2) as a fuel. The material was characterized by powder X-ray diffraction (XRD), FT-IR, SEM and EDX. The average crystallite sizes was calculated by Scherer formula. Thermoluminescence study was carried out for the phosphor which showed single glow curve. The kinetic parameter were calculated by using Chen’s glow curve method. Photoluminescence spectra revealed strong transition at 473 nm (blue), 571 nm (yellow) and weak transition at 645 nm (red). These peaks were assigned to transition 4F9/2 →6H15/2, 13/2, 11/2. CIE graph of Sr2SiO4:Dy3+ phosphor is suitable for the generation of white light emission.
Determination of growth kinetics and size dependent structural, morphological, optical characteristics of sol-gel derived silica nanoparticles in silica matrix
Authors: Uysal Bengü Özuğur , Tepehan Fatma Z.
Published: March 2019

Nanocomposite silica thin films made using the sol-gel method were studied. The nano-silica films were prepared using a mixture of tetraethyl orthosilicate (TEOS), deionized water, ethanol, and ammonia solution. To control the growth of the particles inside the film, the nanocomposite silica film was prepared using a mixture of the nano-silica sol and the silica sol. The change in the particle size with the heat treatment temperature ranging from 450 °C to 1100 °C was investigated. X-ray diffraction (XRD), atomic force microscopy (AFM), scanning electron microscopy (SEM), NKD (refractive index-N, extinction coefficient-K, and thickness-D) and ultraviolet-visible (UV-Vis) spectrophotometry were used for characterization purposes. The XRD studies showed that the nano-silica thin films were amorphous at all annealing temperatures except for 1100 °C. The_-cristobalite crystal structure formed at the annealing temperature of 1100 °C. Optical parameters, such as refractive indices and extinction coefficients, were obtained using the NKD analyzer with respect to the annealing temperature of the films. The activation energy and enthalpy of the nanocomposite silica film were evaluated as 22.3 kJ/mol and 14.7 kJ/mol, respectively. The cut-off wavelength values were calculated by means of extrapolation of the absorbance spectra estimated using the UV-Vis spectroscopy measurements. A red shift in the absorption threshold of the nanocomposite silica films indicated that the size of the silica nanoparticles increased with an increase of the annealing temperatures from 450 °C to 900 °C, and this confirms the quantum confinement effect in the nanoparticles.
Research on energy absorption properties of open-cell copper foam for current collector of Li-ions
Authors: Chen Jian , Li Xiongfei , Li Wei , Li Cong , Xie Baoshan , Dai Shuowei , He Jian-Jun , Ren Yanjie
Published: March 2019

Quasi-static uniaxial compressive tests of open-cell copper (Cu) foams (OCCF) were carried out on an in-situ bi-direction tension/compress testing machine (IBTC 2000). The effects of strain rate, porosity and pore size on the energy absorption of open-cell copper foams were investigated to reveal the energy absorption mechanism. The results show that three performance parameters of open-cell copper foams (OCCF), involving compressive strength, Young modulus and yield stress, increase simultaneously with an increase of strain rate and reduce with increasing porosity and pore size. Furthermore, the energy absorption capacity of OCCF increases with an increase of porosity and pore size. However, energy absorption efficiency increases with increasing porosity and decreasing pore size. The finite element simulation results show that the two-dimensional stochastic model can predict the energy absorption performance of the foam during the compressive process. The large permanent plastic deformation at the weak edge hole is the main factor that affects the energy absorption.
Preliminary Studies to Use Textile Fibers Obtained from Recycled Tires to Reinforce Asphalt Mixtures
Authors: Pais Jorge C. , Ferreira António , Santos Caio , Pereira Paulo , Presti Davide Lo
Published: March 2019

The use of crumb rubber in the modification of asphalt has occurred because of the problems related to disposal of scrap tires. However, the use of scrap tires in asphalt pavements, known as asphalt rubber pavements, can minimize environmental impacts and maximize conservation of natural resources. The textile fibers from recycled tires are typically disposed of in landfills or used in energetic valorization, but similar to other fibers, they can be used as a valuable resource in the reinforcement of engineering materials such as asphalt mixtures. Thus, this work aims at studying the use of textile fibers recycled from ground tires in the reinforcement of conventional asphalt mixtures. The application of textile fibers from ground tires was evaluated through laboratory tests on specimens extracted from slabs produced in the laboratory. Indirect tensile tests were performed on a series of nine asphalt mixtures with different fiber and asphalt contents and compared with a conventional mixture. The results obtained from a 50/70 pen asphalt were used to define three asphalt mixture configurations to be used with 35/50 pen asphalt. The results indicate that the textile fibers recycled from used tires can be a valuable resource in the reinforcement of asphalt mixtures.
Sex identification comparison of barn owls (Tyto alba javanica) using morphological features and molecular-based methods
Authors: Ravindran Shakinah , Saufi Safwan , Amni Wan Nur , Ishak Intan , Hamid Noor Hisham , Abidin Cik Mohd Rizuan Zainal , Ahmad Abu Hassan , Azzam Ghows , Salim Hasber
Published: March 2019

Sexing of barn owls, Tyto alba javanica, using morphological traits has not been accurate enough due to ambiguous sexual dimorphism between sexes. This has been one of the major problems for the management of barn owls worldwide, especially for translocation and captive-breeding programs. In order to increase the success rate of sexing the barn owl, we compared the results of a molecular sexing method to six morphological traits for sexing the owls: the shape and colour of the facial disc, the colour of the throat area, the tail plumage, the colour of their tarsus, the back plumage, and the frequency of spotting on the chest and underside of the wings. The result of our comparison showed that sex identification using morphological traits had an accuracy of only 72.7%. Three of our samples were identified as females using morphological traits, but molecular sexing determined that these samples were males. We also used our results to determine the best morphological traits for sexing barn owls, and concluded that the best traits for morphological sexing are the frequency of spotting on the chest and underparts of barn owls (accuracy of 81.8%), as well as colour of the owls’ facial disc and throat area (accuracy of 63.6%).
Development of Production Machines With Respect to the Human Factors
Authors: Kotek Luboš , Trávníček Petr , Tůma Zdeněk , Novotný Lubomír
Published: March 2019

The inappropriate adaptation of the machinery to human properties and abilities may result both in physiological effects on the operator (e.g. muscle skeletal damage) resulting, for example, from inappropriate body posture, excessive or repeated exertion, and also in psycho-physiological effects such as mental overload or insufficient workload or stress, which may occur due to the operation, inspection or maintenance of the machine within the limits of its intended use. Psycho-physiological effects can lead to an increase in operator’s errors, lower safety or quality, thus directly affecting the quality of the production process. For these reasons, the ergonomics needs to be of high importance. The submitted paper describes the use of advanced virtual reality technologies and risk management in machine development.
The Sharing Economy and Sustainability: a Case Study of India
Authors: Kaushal Leena Ajit
Published: March 2019

The ongoing debates and discussions about sharing economy revolve round its definition, regulations and impact on economy, business and consumers. The paper attempts to develop a theoretical framework that define the sharing economy and analyse the possible association between the sharing economy and sustainability.

The paper also assesses the need for an institutional and regulatory framework to strengthen sharing economy as an economic driver, potentially contributing to the more sustainable growth of the world economy.
A novel Y160C mutation of Keratin 10 gene in a Chinese male infant with epidermolytic hyperkeratosis
Authors: Zhao Chenyu , Li Yonggui , Shi Gaoxing , Shi Xiaoliu , Zhang Guiying
Published: March 2019

Epidermolytic hyperkeratosis (EHK) is a rare genodermatosis whose prevalence is less than 1 in 100,000. Mutations in either the keratin 1 or keratin 10 genes lead to EHK characterized by congenital erythema and epidermal blisters at birth, followed by hyperkeratotic skin lesions with age. We here report a 1-and-a-half-year-old male infant with EHK caused by a novel mutation, c.479A > G, g.489A > G, p. Y160C, of the keratin 10 gene. Mutation at this position has been reported previously, but the type of amino acid change was different. These results expand the database of keratin 10 gene mutations.
Chylous ascites after lymphadenectomy in a Wilms` tumor patient
Authors: Yörük Mustafa Asım , Erat-Nergiz Meryem , Timur Çetin , Canbolat-Ayhan Aylin , Ergüven Müferet
Published: March 2019

Wilms` tumor is the most common renal malignancy in children and the fourth most common childhood cancer. It accounts 6-7% of all childhood malignancies. Surgical resection is an important therapy option and transabdominal or transperitoneal resection with lymph node sampling is preferred. Development of chylous ascites following intraabdominal or retroperitoneal resection in pediatric age group generally results from extensive lymph node dissection, accidental ligation or interruption of lymphatic ducts. Diseases or conditions affecting abdominal and/or retroperitoneal lymph nodes may cause chylous ascites. Postoperative chylous ascites is associated with significant morbidity and may cause mechanic, nutritional and immunological complications. In the present study, a 16-month-old infant with Stage IV Wilms` tumor who developed chylous ascites after left nephrectomy and lymphadenectomy will be presented; chylous ascites treatment with enteral nutrition and surgical treatment approach for Wilms` tumor will be reviewed.
Foot hexadactyly, social implications and management in the African setting: Case report
Authors: Amouzou Komla Sena , Joyce-Malonga-Loukoula Elodie Lucrece , Kouevi-Koko Tete Edem , Bakriga Batarabadja , Abalo Anani
Published: March 2019

Hexadactyly of the foot, an abnormal congenital condition presenting as eight toes, is a rare malformation. We report the case of a ten-year-old girl, admitted to our orthopedic and reconstructive surgery department for a preaxial hexadactyly. The girl was abandoned by her parents at birth and stopped school early due to stigmatization. The goals of the surgical procedure were: social reintegration, gait improvement, ability to wear shoes comfortably, and improved appearance of the foot. The surgery was a medial resection of the supernumerary toes.
The Struggle Continues in Winnipeg: The Workers Organizing and Resource Centre
Authors: Bickerton Geoff , Stearns Catherine
Published: March 2019

In most communities the relationship between trade unions and social activist organizations is usually underdeveloped and uneven. Likewise trade unions usually have no organic connections to unorganized workers and contribute little to the task of representing these workers in their struggles against employers and government agencies. The Workers Organizing and Resource Centre (WORC), a collective administered by trade unionists and social activists, is an attempt to bridge this solitude. Since it was established in 1998, WORC has been the home to numerous working class advocacy organizations and a hub of progressive activity in Winnipeg. Its mandate is to facilitate the development of community organizations, provide advocacy work for non union workers, and to assist in organizing the unorganized. This paper describes the function that WORC plays in the Winnipeg progressive community and discusses the relationship to its sole source of funding, the national office of the Canadian Union of Postal Workers. Dans la plupart des communautés, les relations entre les syndicats et les autres organisations d’action sociale sont habituellement sous-développées et inégales. Les syndicats n’ont habituellement pas de lien organique avec les travailleurs et les travailleuses non syndiqués et ne contribuent guère à leur représentation dans les luttes qu’ils livrent aux employeurs et aux organismes gouvernementaux. Le Workers Organizing and Resource Centre (WORC), collectif administré par des militantes et militants syndicaux et sociaux, tente de combler cette lacune. Depuis sa création, en 1998, le WORC a accueilli de nombreuses organisations militantes de la classe travailleuse et a constitué une plaque tournante de l’activité progressiste à Winnipeg. Il a pour mandat de faciliter le développement d’organisations communautaires, d’attribuer des tâches de défense de cause aux travailleurs et travailleuses non syndiqués et d’aider à la syndicalisation des personnes non syndiquées. L’article décrit le rôle que le WORC joue dans la communauté progressiste de Winnipeg et le rapport qu’il entretient avec son unique source de fonds, qui est le bureau national du Syndicat des travailleurs et travailleuses des postes
TFRS 16 – Kiralamalar’ın Grup İçi Muhasebe Politikaları Çerçevesinde Değerlendirilmesi
Authors: HAZIR Çağrı Aksoy
Published: March 2019

Yeni kiralamalar standardı olan TFRS 16’nın kullanılmaya başlanması, şirketlerin muhasebe, vergi, finansal raporlama, yatırımcı ilişkileri, satın alma ve bilgi sistemleri gibi pek alanını etkileyecektir. Kiracının karar ve tahminleri değişecek ve özellikle faaliyet kiralaması ağırlıklı çalışan şirketlerin muhasebe politikalarının yeniden değerlendirilmesini gerektirecektir. Bu standart şirketlerin bilançoları, gelir tabloları ve finansal oranlarını etkileyecektir. Bu çalışmanın amacı; TFRS 16 – Kiralamalar’ın farklı muhasebe politikaları kullanılarak konsolide finansal tablolar üzerindeki etkisinin incelenmesidir. Çalışmada alternatif muhasebe politikaları aracılığıyla TFRS – 16’nın finansal etkileri ele alınmıştır.
Obstrução intestinal associada a tricobezoares de grande volume – um relato de caso
Authors: De Souza Raphaela Silva , Cabral Brígida Thaine Fernandes , Rodriguez Juan Eduardo Rios , Souza Lucia Tatiana Filgueiras de , Andrade Thais Dourado de , Medeiros Izabela Augusta de Oliveira
Published: March 2019

Objetivo: Relatar um caso de obstrução intestinal causada por massa formada a partir da ingesta de pelos Relato do caso: Trata- se de paciente do sexo feminino, 15 anos, procura o serviço de Pronto Socorro com relato de constipação intestinal há 15 dias, sem comorbidades conhecidas até o momento. Após lavagem intestinal com clister glicerinado, foi avaliada com melhora e alta no mesmo dia. Após 24 horas, evoluiu com vômitos fecalóides, distensão abdominal e febre não aferida. Após estabilização hemodinâmica, foi realizada tomografia computadorizada de abdômen, evidenciando sinais de obstrução intestinal sem fator obstrutivo evidente. Foi indicada laparotomia exploradora para melhor avaliação e tratamento do caso. Discussão: Tricobezoares são causas raras na população em geral, mas em populações específicas, como adolescentes do sexo feminino por exemplo, tendem a ser mais comuns. Não obstante, apenas o tratamento cirúrgico não é suficiente no tratamento, devendo a mesma ser encaminhada aos serviços de assistência social, psicologia e psiquiatria, para evitar novos casos e complicações.
Improving Students’ Reading Comprehension by Using Reciprocal Teaching Strategy
Authors: Maspufah Maspufah
Published: March 2019

Reading occupies large portion in teaching-learning activities, especially for English department students. It is reasonable since all their learning materials are in English. However, their ability in reading comprehension is low. Therefore, it is necessary to conduct a research to solve this problem. The purpose of this research was to find out whether Reciprocal Teaching strategy can solve and improve the students’ reading comprehension. Moreover, this research was also to find out what factors influence the improvement of the students’ reading comprehension. This research is action research. The participants of the research were the third semester students of 2018-2019 academic year which consisted of 13 students. The instruments used to collect the data were from observation checklists, field notes, interviews, and reading tests. After analyzing the data, it was found that reciprocal teaching strategy was able to improve the students’ reading comprehension ability. It could be seen from the improvement of their mean score in reading comprehension at the end of the cycle 1. The factors that influenced the improvement of their reading ability involved materials, teacher’s knowledge, students’ interaction, and assessment activities. To sum up, the implementation of reciprocal teaching strategy was able to provide positive results on their reading comprehension.
autoDIAS: A Python Tool for an Automated Distortion/Interaction Activation Strain Analysis
Authors: Svatunek Dennis , Houk Kendall N.
Published: March 2019

The Distortion/Interaction Activation Strain (DIAS) analysis is a powerful tool for the investigation of energy barriers. However, setup and data analysis of such a calculation can be cumbersome and requires lengthy intervention of the user. We present autoDIAS, a python tool for the automated setup, performance, and data extraction of the DIAS analysis, including automated detection of fragments and relevant geometric parameters.