bluuebunny/crossref_metadata_2025 huggingface dataset:
Lucia's Journey of Bridging Two Worlds
Authors: Tello Angelica M.
Published: August 2019

Lucia is a Latina first-generation college student (FGCS) attending a predominantly white institution, a state university in her hometown, located in a large metropolitan city in the Southern United States. While in her sophomore year, Lucia accessed counseling services on her campus to discuss having difficultly balancing school, work, and home responsibilities. In this chapter, the author discussed the challenges experienced by Latinx FGCS along with the strengths they bring to college settings. In addition, the author utilized the case study of Lucia to discuss her counseling approach for helping Latinx FGCS navigate the terrains of higher education.
Nomadic Terrorism, Displacement, and Food Insecurity Challenge in the Food Basket of the Nation
Authors: Olayiwola Opeyemi Ademola
Published: August 2019

The Middle Belt region of Nigeria, comprising significant parts of Benue, Nasarawa, Taraba, Adamawa, Plateau, Kogi, and Kwara, has been a battle ground for the nomadic terrorism in the past few years. Through the inspiration of Boko Haram, the nomadic terrorists have been able to infiltrate this part of the country impossible for the conventional Boko Haram to penetrate, leading to destruction of lives and livelihood, and displacement of thousands of people, with Benue State, referred to as the “Food Basket of the Nation,” the worst affected in the zone. While much attention is given to its impacts on human insecurity, what has been less observed, at least from an academic point of view, is its food insecurity impacts. Using phenomenological qualitative research, the study examined the impacts of nomadic terrorism on food insecurity in the Food Basket of the Nation in Nigeria. The study has implications for policymaking to address the state of IDPs in new location and militate against nomadic terrorism and conflicts in the Food Basket of the Nation and tackle food insecurity.
Islam, Sustainable Consumption, and Consumers' Motivations in Nigeria
Authors: Fahm AbdulGafar Olawale
Published: August 2019

The chapter considers the views of Islam, consumer, and consumption researchers on the compatibility and incompatibility of Islam with sustainable consumption. To this end, the author examine the consumers' motivations for consumption and critically evaluate their parallels within Islamic norms. Then, the notions of Islam and consumption are analyzed and evaluated in depth. The study also attempts to show the Muslims' perception of consumption and motivation. The findings suggest that Muslim consumers in Nigeria are motivated to practice sustainable consumption and are driven primarily by their Islamic understandings. This study, therefore, recommends the concept of moderation as a major Islamic motivation to consumption sustainability and if put in place could result in a compatible motivation to sustainable consumption.
Analyzing the Influential Factors of Older Worker's Job Training Participation
Authors: Cho Sung-Eun , Lee Young-Min
Published: August 2019

This study explores determinants of middle-aged workers' participation in job training and provides implications to vitalizing middle-aged workers' participation in job training, using logistic regression analysis of Korea Labor Institute (KLIPS) data. As a result, among individual characteristics of older workers, residence in the metropolitan area, family relationship satisfaction, and household status have a significant effect on participation in job training. Regarding job and individual work characteristics, current work experience has a positive relationship. While for corporate characteristics, presence of unions and availability of statutory severance pay have a significant effect on participation in job training. Consequently, this study provides implications for vitalizing the older workers' participation in job training.
Towards a Reference Framework for Generational Analyses on Information Technology Professionals
Authors: Jácome de Moura Jr. Pedro , Helal Diogo Henrique
Published: August 2019

In light of the sociology of generations, this theoretical trial relates literature on information technology (IT) professionals, IT professional management, IT project teams, and generational studies to elaborate a reference framework that supports the research on the intergenerational dynamics of the field. The proposed framework offers a definition and structure for the concept of IT generation and contemplates the dimensions related to (1) technological contemporary changes, (2) culture bearers, (3) continuous nature of generational change, (4) generational succession, (5) knowledge transmission and sharing, and (6) intergenerational conflict, allowing future empirical research on the IT generational phenomena.
Millennial Leadership Model
Authors: Petrelli Heather M. W.
Published: August 2019

Recent attention has been given to the attitudes, perceptions, and needs of the Millennial Generation both in the educational setting and the workforce. This chapter provides background and rationale for the development of a Millennial Leadership model benefitting teachers, administrators, and employers desiring to proactively address concerns attributed to individuals in the millennial generation, and positively influence their success. A brief overview of the past four generations events, both social and politically, that have shaped values and perspectives. Millennials at work and the effects of the economic recession on Millennials are also discussed. The chapter ends with a model for millennial leadership, which outlines clear expectations, open and respectful communication, consistent feedback, flexibility, involved decision-making and provided opportunities for growth.
Challenge of Millennials in Project Management
Authors: Yıldırım Nihan , Korkmaz Yeliz
Published: August 2019

The need for understanding Generation Y employees' attitudes and expectations that considerably differed from previous generations had been a focus of researchers in the last decades. IT industry and specifically software industry had been among the most popular employment areas of Generation Y professionals and hence Generation Y Software Developers constitutes the majority of the work force in the software industry. As known, software development is a project-based business where the project management methodologies and principles are utilized. Similar to other project based works, the effectiveness of human resources management and team development is the determinant of project success in software development. Therefore, to effectively manage and to adapt appropriate approaches for leading the project teams which include Generation Y software professionals, managers and leaders prior in need to understand their perspective. In this context, research aims to understand the expectations and attitudes of Generation Y Software Developer professionals in projects. The research is structured in two parts reflecting these dual aims. The first part of the research addresses the expectations of Y generation employees from project management and project environment in software development projects. The second part of the research explores the attitudes of Y generation Employees in software development project teams. Survey is conducted with the participation of 113 Generation Y Software Professionals who are employed in major software companies in Turkey. Basic concepts that are explored in the study are expectations from working environment, expectations from project type and content, leadership, motivation factors, challenges faced, perceptions on generation conflicts and the attitudes of Generation Y professionals towards project-based work and work environments. Software industry is dominated by project based management methods, perceptions and attitudes of Generation Y in projects are expected to provide practical guidelines to policy makers and HR professionals in developing solutions and tools for improving motivations and effectiveness of Generation Y employees.
Technology Adoption for Addressing Precarious Youth Employment Issue
Authors: Hassan Azizul
Published: August 2019

This study critically analyzes precarious youth employment in Bangladesh having a specific focus on her tourism industry. Traditionally, the tourism economy of Bangladesh is considered as promising. This research arguably identifies the tourism industry of Bangladesh encouraging conceptual precarious youth employment. From theoretical perspective, this chapter addresses the Theory of Scientific Management of Frederick Taylor (1911) and the Systems Theory of Dunlop (1958) in this context. This conceptual study understands precarious youth employment in the Bangladesh tourism and relates relevance of the two theories mentioned. Based on arguments, this study outlines the role of Information and Communication Technology (ICT) as a latent option to minimize issues generated from precarious youth employment. An in-depth analysis offers policy suggestions for the betterment of youth employment in the Bangladesh tourism industry.
Cooperative Asynchronous Parallel Particle Swarm Optimization for Large Dimensional Problems
Authors: Bourennani Farid
Published: August 2019

Metaheuristics have been very successful to solve NP-hard optimization problems. However, some problems such as big optimization problems are too expensive to be solved using classical computing. Naturally, the increasing availability of high performance computing (HPC) is an appropriate alternative to solve such complex problems. In addition, the use of HPC can lead to more accurate metaheuristics if their internal mechanisms are enhanced. Particle swarm optimization (PSO) is one of the most know metaheuristics and yet does not have many parallel versions of PSO which take advantage of HPC via algorithmic modifications. Therefore, in this article, the authors propose a cooperative asynchronous parallel PSO algorithm (CAPPSO) with a new velocity calculation that utilizes a cooperative model of sub-swarms. The asynchronous communication among the sub-swarms makes CAPPSO faster than a parallel and more accurate than the master-slave PSO (MS-PSO) when the tested big problems.
Placement of Relay Stations in WiMAX Network Using Glowworm Swarm Optimization
Authors: Sangeetha J  , Nagaraj Keerthiraj , Rustagi Ram Prakash , Balasubramanya Murthy K N
Published: August 2019

The Relay Station (RS) deployment problem for WiMAX networks is studied. Unlike Base Station (BS), RS does not need a wire-line backhaul and has much lower hardware complexity. Hence, usage of RSs can significantly minimize the deployment cost and maximize the network coverage of the system. To solve the RS deployment problem, the authors have used a nature inspired technique known as Glowworm Swarm Optimization (GSO). Different cases have been considered for a single fixed BS, to find the feasible number of RSs and its optimal placement in WiMAX networks. Computational experiments are conducted to show the effect of RS deployments in different distribution scenarios. This article also shows the impact of placing RSs at optimal locations to serve given Mobile Stations (MSs) that are distributed arbitrarily in a given geographic region such that the cost is minimized, and the network coverage is maximized. The results obtained from the GSO algorithm are compared with k-means algorithm and it is observed that GSO performs better than k-means algorithm.
Score Level Fusion of Palmprint, Face and Iris Using Adaptive PSO
Authors: Boucetta Aldjia , Melkemi Kamal Eddine
Published: August 2019

Systems that use unimodal biometrics often suffer from various drawbacks such as noise in sensed data, variations that are due to intra class, nonuniversality, spoof attacks, restricted degrees of freedom and high error rates. These limitations can be solved effectively by combining two or more biometric modalities. In this article, a multimodal biometric fusion system is presented that combines palmprint, face and iris traits. The biometric fusion is performed at the score level in order to improve the accuracy of the system. Scores obtained from the three classifiers are fused using adaptive particle swarm optimization (PSO). The PSO use new multi objective fitness function. This function has two objectives, improve the recognition rate and reduce the total equal error rates. The experimental results of the proposed method achieve a recognition accuracy of 100%, with EER of 0.00%, using Gabor filter combined with dimensionality reduction techniques PCA, LDA and KFA. Experimental results show that multimodal biometric systems are much more accurate than the unimodal counterparts.
Towards the Meta-Modeling of Complex Inter-Organisationnel Collaborative Processes
Authors: Semar-Bitah Kahina , Boukhalfa Kamel
Published: August 2019

Enterprises are progressively embedded in business to business atmospheres, in order to achieve their common business objectives. Such collaborations lead to Inter-Organizational Business Processes. Therefore, IOBP modeling involves new challenges, mainly the ability to deal with autonomy, privacy, heterogeneity. As a contribution in this area, a IOBP meta-model was designed. This model takes into account the maximum concepts related to the collaboration. Where, the process is complex, and its model in a global way affects its vision and complicates its implementation and hence the idea of its analysis into sub-IOBP to reduce the complexity of the global collaborative process, to streamline information exchange and to facilitate the understanding of the process by partners. A set of Atlas Transformation Language (ATL) transformation rules has been defined to convert Unified Modeling Language (UML) models to Business Process Model and Notation. Finally, the application of our approach has been demonstrated through a framework which can solve the problem of generic IOBP.
A Study of the Antecedents of Collaborative Consumption Engagement and the Moderating Effect of Self-Identity
Authors: Choi Youngkeun
Published: August 2019

The purpose of the present study was to examine the relationships between motivation factors and collaborative consumption engagement and explore the moderating effect of self-identity on that relationship. For this, the present study collected data from 228 college students in South Korea through a survey method. In the results, first, the more sustainable or economic benefit participants perceive in collaborative consumption platforms, the more they are engaged in collaborative consumption. Second, the positive relationship between perceived sustainability and collaborative consumption engagement is stronger for participants in collaborative consumption platforms higher in interdependent self-view. However, interdependent self-view was found to have no significance on the relationship between perceived economic benefits and CC engagement.
A Survey on IoT (Internet of Things) Emerging Technologies and Its Application
Authors: Nair Rajit , Sharma Preeti , Bhagat Amit , Dwivedi Vidya Kant
Published: August 2019

In this article. the authors present a review on the IoT (Internet of Things) and its future scope in various areas. The IoT is one of the latest systems which provide a set of new services for upcoming technological innovations. It is said to be integration of cyber world with the physical world and empowered by the development of RFID, smart sensors, communication technology and internet protocols. The most important application of IoT is to deliver a class of application directly through smart sensors. Exponential development in mobile technology and machine to machine technologies has been done through the IoT only. In the near future, the IoT will be solely responsible for smart decision making and this will be implemented by incorporating new technologies with smart physical objects. Despite all these advancements by researchers, standardization bodies, industries, alliances and others there are still some problems while using IoT.
Forecasting Model of Wheat Yield in Relation to Rainfall Variability in North Africa Countries
Authors: Soliman Ibrahim M. A.
Published: August 2019

The study investigated the effect of rainfall variations on wheat yield in Morocco as a representative case study of North Africa region. The data were collected for the period 2004– 2015 from 12 meteorological stations. The wheat yield variability range was 79.5%-38.0%. It increased in poor-rain years and the regions of precipitation ≤ 350 mm. The wheat yield showed more significant response to monthly perception changes than the annual. The estimated forecasting model showed that March's rain was the critical month for wheat yield as the elasticity of production was 0.587. April and May showed an elasticity of 0.011 and 0.023, respectively. The estimated response of wheat farm price to grain yield showed that 10% increase in wheat yield would decrease the farm gate price by 4.1%, i.e. poor rainy seasons mean income foregone with the loss of inputs expenses and expansion in imported wheat. A country buffer stock, a regional strategic stock of wheat and supplementary water for irrigation in poor precipitation years are required.
The Industry of Tourism in Developing Countries
Authors: Ahmeti Siana , Demi Albana , Katsioloudes Marios
Published: August 2019

This article briefly describes the development of the tourism sector in Albania, summarizing consumer behavior theory at a micro prospective, and providing a few general ideas on how the Albanian market can stimulate a change in European consumers' behavior and attract a larger and constant stream of tourists. This article is elaborated from three perspectives of the environment: the economic, the socio–cultural, and the technological. Starting with the economic environment perspective, the authors explore ways to ensure the efficient development of the economy through resource management, with the purpose of creating space for future generations. Following the social-cultural environment perspective, they analyze the way social and cultural sustainability ensures and enhances people's life skills, strengthens community identity and improves food safety practices through educational campaigns in the hospitality sector. Closing with the technological environment perspective, the authors explore ways to strengthen Albania's online position and improve telecommunication channels between urban and rural areas.
An Innovative Technique to Encrypt Videos for Authenticity or Ownership Protection Using PCA Applied in E-Commerce
Authors: Modwel Garv , Mehra Anu , Rakesh Nitin , Mishra K K
Published: August 2019

Whenever there is a copywrite protection an article or official material it is usually encrypted with specific information that can only be decrypted by the person who created the document and the owner can claim the ownership of the original document. This type of encryption is called watermarking. This can be used by different e-commerce sites like Netflix, Amazon Prime, who can protect their media through the process of watermarking. As computational power is increasing along with applied mathematics, the application area is now available for multimedia files. This article focuses on encryption of video files so that the owner can claim the ownership of the created video file. The technology also enables the secrecy of the encryption between the sender and the receiver so that receiver can decrypt the file and receive the ownership that is being transferred from the user. In another way, any e-commerce site can claim the ownership of their media if it is pirated.
Test Case Prioritization Using Clustering Approach for Object Oriented Software
Authors: Yadav Dharmveer Kumar , Dutta Sandip Kumar
Published: August 2019

In the software maintenance activity, regression testing is performed for validing modified source code. Regression testing ensures that the modified code would not affect the earlier tested program. Due to a constraint of resources and time, regression testing is a time-consuming process and it is a very expensive activity. During the regression testing, a set of the test case and the existing test cases are reused. To minimize the cost of regression testing, the researchers proposed a test case prioritization based on clustering techniques. In recent years, research on regression testing has made significant progress for object-oriented software. The empirical results show the importance of K-mean clustering algorithm used to achieve an effective result. They found from experimental results that their proposed approach achieves the highest faults detected value than others.
Transport Phenomenon of Nanoparticles in Animals and Humans
Authors: Ansari Mohammad Javed
Published: August 2019

Nanoparticles (NPs) are microscopic objects with at least one dimension less than 100 nm. These were first discovered by Michael Faraday in 1857 when he prepared gold nanoparticles and observed that nanostructured gold produced red color. This distinct feature of nanoparticles could be due to very small size. NPs are very small compared to the wavelengths of light, hence absorb light in the blue-green portion of the spectrum (~450 nm) and reflect the red light (~700 nm) thus yield a rich red color. NPs also possess very high surface to mass ratio that could be utilized in several application areas wherein a very high surface area is required. Nanoparticles witnessed tremendous growth in research and application areas especially in medicine in twentieth century after discovery of carbon nanotubes in 1991. Nanoparticles have been explored in medicine as targeted delivery carriers to deliver macromolecules such as proteins, enzymes, to the target organ up to cellular levels. Of late, these carriers have been employed to treat several tumors owing to its capacity to deliver chemotherapeutic agents to the tumor cells only thus improving efficacy and minimizing side effects of anticancer agents.
Graphene Composites
Authors: Lai Chin Wei
Published: August 2019

This chapter reviews recent development of graphene-based polymer composites. The formation of graphene oxide and graphene are a vital two dimensional (2D) material has received a lot of research interest in commercialization aspect due to its excellent electrical, thermal as well as mechanical properties at very low filler content. In this manner, utilization of graphene-based polymer composites with different polymer matrixes have been attracted increasing attention in recent years for both fundamental studies and applied research into industrial applications in many fields. Herein, novel properties of polymer (epoxy, polystyrene, and PANI) / graphene composites will be reviewed along with detailed examples drawn from the scientific literature. Keywords: Graphene-based polymer composites, thermo-mechanical properties, two dimensional (2D) materials
Natural Fiber Reinforced Synthetic Polymer Composites
Authors: Uğraşkan Volkan , Toraman Abdullah , Yoruç A. Binnaz Hazar
Published: August 2019

In early composite materials, the use of petroleum based fibers such as glass and carbon fibers, aramid etc. was common. In order to reduce the dependency on petroleum based sources and environmental pollution, researchers have focused on the search for alternative sources. Natural fibers are abundant, recyclable and biodegradable plant derived materials. Besides, thanks to good physical, thermal and mechanical properties, natural fibers become promising alternative for composites. This review includes information about natural fiber reinforced composites’ components, manufacturing methods, mechanical properties and applications.
Carbon Nanotube Composites
Authors: Kumar Ponnusamy Senthil , Joshiba G. Janet
Published: August 2019

The discovery of carbon nanotubes is one of the remarkable achievement in the field of material science and it is a great advancement of Nanotechnology. A carbon nanotube is an expedient material used in several domains and paves way for the welfare of humans in many ways. Carbon nanotubes are nanosized tubes made from graphitic carbons and it is well known for its exclusive physical and chemical properties. The market demand for the nanotubes has increased progressively due to its size dependent, structure and mechanical properties. The carbon nanotubes possess high tensile strength and it is also found to be the durable fibre ever known. It is also found to possess exceptional electrical properties. The carbon nanotube composites have an excellent young’s modulus and higher tensile strength same as graphite carbon. This review plots the properties of carbon nanotubes and portrays the planning and properties of carbon nanotube composites. The wide application of carbon nanotube composites is also explained.
Thermo Mechanical Properties of Carbon Nanotube Composites
Authors: Wilson Runcy , Gejo George , Prajith P.G. , Sanu Mathew Simon , Chandran Anoop , Unnikrishnan Nellipparambil Vishwambharan
Published: August 2019

The possibility of creating polymeric nanocomposites with desired properties can be achieved by mixing it with an appropriate nanomaterial. The carbon-based nanomaterials have an excellent combination of both physical and chemical properties which create a significant interest among the researchers to prepare an industrially useful material employing carbon based nanomaterials as the filler. The thermo-mechanical properties of materials are studied to characterize their internal state and structure. In this chapter, the thermomechanical properties of polymer-CNT nanocomposites and the various factors affecting the thermomechanical properties are discussed.
Thermoplastic Vulcanizates Filled with а Layered Silicate
Authors: Volfson Svetoslav Isaakovich , Okhotina N.A. , Nigmatullina Alina Ildusovna
Published: August 2019

Oil-resistant and thermoformed thermoplastic vulcanizates based on butadiene-nitrile rubber and polypropylene were obtained, containing a layered silicate montmorillonite as a filler. The structural characteristics of composites based on thermoplastic vulcanizates were studied using the methods of fractal analysis. It has been established that the value of the static flexibility of the polymer chain of a thermoplastic vulcanizate containing montmorillonite exceeds the static flexibility of the polymer chain of an unfilled thermoplastic vulcanizate. It is shown that the introduction of montmorillonite in the amount of 1-3 pbw in thermoplastic vulcanizates leads to improved performance characteristics of the obtained composites.
Kinetic of Oxidative Polymerization of Benzylidene-Phenylenediamines and Investigation of their Thermal Properties
Authors: Borukaev Timur A. , Shaov A.Kh. , Otarova R.M. , Pashtova L.R. , Salamov A.Kh.
Published: August 2019

Oxidative polymerization of benzylidenephenylenediamines produced polymers containing conjugated double bonds. Kinetic studies of the processes of oxidative polymerization of benzylidenephenylene diamines were carried out. The obtained kinetic dependencies allowed us to suggest the mechanism of oxidative polymerization of benzylidenephenylenediamines, which flows through the stage of formation of the cation radical, dimmer, tetramer, leading eventually to the formation of the polymer. In this case the limiting stadia is the formation of cation-radical, and chain growth occurs by N-C. A study of the thermal properties of the polymers showed that polybenzylidenephenylenediamines is characterized by rather high values of heat resistance. It was found that the process of destruction of most of the synthesized polymers occurs in several stages and depends on the chemical structure of the macromolecule.
Dependence of the Physical-Mechanical Properties of Cured Epoxy-Amine Resin on the Ratio of its Components
Authors: Garifullin Nilson O. , Komarov Boris A. , Kapasharov Artur T. , Malkov Georgiy V.
Published: August 2019

The results of studying of the physical-mechanical properties of DGEBA-epoxy resin cured by 4,4'-diaminodiphenylmethane (DDM) are presented. The molar ratio of the concentrations of amine (NH) and epoxy (EP) groups are: 0.5; 0.6; 0.7; 0.75; 0.8; 0.9; 1; 1.11; 1.25; 1.33; 1.43; 1.66; 2. Samples of the cured resin were examined in tension and three-point bending according to ASTM D638-10 and ASTM D 3039 standards, respectively, using the Zwick / Roel TC-FR010 universal testing machine. As a result, the dependencies of the resins physical-mechanical properties (modulus of elasticity, strength, elongation at break, glass temperature) on the NH / EP ratio and the curing temperature were obtained.
Kinetic Study of the Polyaddition of Azide-Alkyne AB2 Monomers in Nonisotermic Conditions
Authors: Petrov A.O. , Malkov Georgiy V. , Karpov Sergei V. , Shastin A.V. , Bakeshko A.V.
Published: August 2019

Nowadays, hyperbranched polymers (HBP) are obtained by different polycondensation and polyaddition reactions [1]. Almost interest is the reaction of 1,3-dipolar cycloaddition of azides to alkynes (1,3-DCA) [2, 3]. There is a series of papers dedicated to the preparation of triazine-triazole HBPs [4, 5, 6]. These polymers were obtained by the reaction of azido-acetylene AB2 monomers polyaddition: 2-azido-4,6-bis (propyne-2-yloxy) -1,3,5-triazine (ABPOT) and 2,4-diazido-6- (propine-2-yloxy) -1,3,5-triazine (DAPOT) (Fig. 1).
Efficiency of Application of Hydrolyzed Polyacrylamide and Copolymer Acrylamide with Potassium Acrylate as a Water-Swelling Agent in Rubbers
Authors: Lopatina Svetlana S. , Vaniev M.A. , Sychev N.V. , Nilidin D.A. , Savchenko Y.Yu. , Bruk A.D.
Published: August 2019

This paper reviews water swelling of rubber, based on nitrile-butadiene rubber, modified by polyacrylamide and copolymer acrylamide with potassium acrylate, also their combination with sodium-carboxymethyl cellulose. During the exposure for 14 days at a temperature of 67 °С swelling ratio in water is 200 % and 47 % in 10 % aqueous solution of sodium chloride.
Composites Based on Thermoplastic Polymeric Matrix and Carbon Nanoparticles with Special Functional Properties
Authors: Moskalyuk Olga A. , Tsokkallo E.S. , Stepashkina A.S. , Yudin V.E.
Published: August 2019

Polymer composite materials based on polypropylene matrix and carbon nanoparticles of various shapes: spherical particles - carbon black and anisotropic nanoparticles - carbon nanofibers, were obtained by the melt technology. A character of the dependences of the electrical conductivities on the concentration of carbon nanofillers has been revealed. A simulation of the electrical conductivity of the polymer composite in the region of the concentration of the filler at the threshold of the flow of electric current and below it was carried out.
Studies of the Effect of Decontamination Methods on the Surface Condition of the Stoppers in Contact with Drugs
Authors: Khakimullin Yu.N. , Simonova N.N. , Guzhova S.V. , Zakirova Larisa Yuryevna , Romanova N.K. , Yarullin R.S.
Published: August 2019

The influence of means and modes of sanitary-hygienic treatments on the surface condition of medical rubber stoppers based on butyl and halobutyl rubbers used for sealing injection and infusion drugs was investigated using the method of determining the contact wetting angle on a DCAT 21 tensiometer. It has been established that the methods used for sanitary-hygienic processing have a destructive effect on the state of the surface, accompanied by a decrease in the edge angle of wetting (an increase in the hydrophilicity of the surface of the stoppers), which significantly increases the possibility of interaction with the dissolved pharmaceutical substances of drugs.
Reversible Wettability Effect of the Organic-(≡TiO)n- Inorganic Terpolymers Surface
Authors: Ryabkova Olga A. , Salomatina E.V. , Smirnova L.A.
Published: August 2019

The optically transparent organic-inorganic terpolymers were obtained on the basis of poly (titanium oxide) and organic monomers of the vinyl series, characterized by the reversible wettability of the surface. The poly (titanium oxide) inside the material had a structure close to anatase and was uniformly distributed over the surface of the sample as it was determined by X-ray phase analysis and electron microscopy. A single-electron transition Ti4++ e ̅ → Ti3+ occurred in the samples under UV-irradiation accompanied by a breaking of the Ti-O bond and a decreasing of the terpolymers transparency from 90% to 20%; the process was reversible in time. The reversible of the samples surfaces from hydrophobic to hydrophilic were observed. The water wetting angle varied within 80 °↔ 5 ° range.
Investigation of the Process of Finishing of Carbon Fibers of Various Brands with Oligomers and Polymers of Various Chemical Structures
Authors: Beev Aues A. , Khashirova S.Yu. , Guchinov V.A. , Beeva D.A. , Makoeva M.V. , Shokumova M.U.
Published: August 2019

The article presents the results of work on the dressing of various continuous carbon fibers of a different structure with compounds of oligomeric and polymeric nature. Using gravimetry, optical and scanning electron microscopy methods, it was shown that the fixation of sizing substances on the surface of carbon fibers depends on the brand of carbon fiber, the method of chemical activation and the nature of the sizing agent. It has been shown that the studied coupling agents exhibit increased adhesion to carbon fiber of the brand TGN-2.
Modified of the Epoxy Coatings by Polyaniline
Authors: Kurbatov Vladimir G. , Pugacheva T.A.
Published: August 2019

An actual problem is searching of new pathways of increase of anticorrosion properties of an organic coating. In the field of practice and the theory of metal protection from corrosion recently there were novel trends. One of them – making and examination of the conducting polymers inhibiting corrosion of many metals. Influence of the amine hardener modified by polyaniline (PANi) on anticorrosion properties of epoxy coatings in various corrosion-active mediums was studied. The polarization studies have shown that the introduction of PANI in the epoxy polymer coating reduces the corrosion current density. Using electrochemical impedance spectroscopy has established that coatings containing of PANI, are less permeable due to its hydrophobic. It was showed, that PANi it can be used for increase of anticorrosion properties of manufacturing epoxy primer.
The Use of Polylactic Acid to Obtain Biodegradable Medical Devices
Authors: Galimzyanova Rezeda Yu. , Mevliyanova M.D. , Hisamieva D.R. , Pesternnikova N.V. , Musin Ildar N. , Lisanevich M.S.
Published: August 2019

Polylactic acid, due to such properties as biocompatibility, inertness to aggressive media of the human body and biodegradability is becoming more widespread in medicine, particularly in traumatology and reconstructive surgery. The article discusses modern developments in the field of biodegradable medical products based on polylactic acid that are already on the market or planned for production in the near future. Also considered the major major producers of polylactic acid.
Investigation of the Effect of Electron Radiation on the Structure of Polypropylene Using Optical and Atomic Force Spectroscopy Methods
Authors: Rakhmatullina Elvina R. , Galimzyanova Rezeda Yu. , Lisanevich M.S. , Khakimullin Yu.N. , Konovalova O.A.
Published: August 2019

Using optical and atomic-force microscopy methods, it has been established that exposure to electron radiation causes a change in the supramolecular structure of polypropylene – in films obtained by recrystallization of irradiated polypropylene, spherulites have a less perfect shape than films obtained from unirradiated polypropylene. Also, the films obtained by recrystallization of irradiated polypropylene surface roughness is greater.
Synthesis of Waterborne Polyurethanes Using the Isophorone Diisocyanate Oligoisocyanurates
Authors: Chernyayev Dmitry A. , Karpov Sergei V. , Jalmuhanova A.S. , Badamshina E.R.
Published: August 2019

The new method of synthesis of waterborne polyurethanes with isophoronediisocyanateoligoisocyanurates as the isocyanate containing compound was developed and approved.
Effect of the Technological Additives on the Properties of Recycled Polyolefins
Authors: Volfson Svetoslav Isaakovich , Zakirova Larisa Yuryevna , Karaseva Yulia Sergeevna , Nigmatullina Alina Ildusovna
Published: August 2019

Recycling of polymers is an important environmental task. However, during the recycling of polymers many technological problems arise because usually not only one polymer, but also mixtures of polymers are recycled. To improve technological properties, such as increasing fluidity, improving processability and quality, reducing the melt pressure in the spinneret head, addressing surface defects caused by viscosity anomaly and excessive shear stresses, preventing the formation of deposits and residue on the forming tool, increasing productivity, reducing the amount gelic, etc., use processing and technological additives. In the research, the effect of technological additives manufactured by Weihai CY Dendrimer Technology Co., Ltd (China) on the technological and thermal properties of recycled polyolefins was studied. It was shown that the technological additives improved the technological properties of recycled polymers: the mixing energy decreased when receiving compositions, the melt flow index values increased, the thermal properties did not deteriorate. The results show the possibility of using of the technological additives in production to increase the productivity of processing equipment and reducing its energy consumption.
Phenotypic and Ig Repertoire Analyses Indicate a Common Origin of IgD−CD27− Double Negative B Cells in Healthy Individuals and Multiple Sclerosis Patients
Authors: Fraussen Judith , Marquez Susanna , Takata Kazushiro , Beckers Lien , Montes Diaz Gwendoline , Zografou Chrysoula , Van Wijmeersch Bart , Villar Luisa M. , O’Connor Kevin C. , Kleinstein Steven H. , Somers Veerle
Published: August 2019

IgD−CD27− double negative (DN) B cells with proinflammatory characteristics are abnormally elevated in a proportion of multiple sclerosis (MS) patients. In this study, the origin and selection characteristics of DN B cells were studied in MS patients and healthy controls (HC). Expression of developmental markers on peripheral blood DN, IgD−CD27+ class-switched memory (CSM) and IgD+CD27− naive B cells of HC (n = 48) and MS patients (n = 96) was determined by flow cytometry. High-throughput adaptive immune receptor repertoire sequencing was performed on peripheral blood DN and CSM B cells of HC and MS patients (n = 3 each). DN B cells from HC and MS patients showed similar phenotypic and Ig repertoire characteristics. Phenotypic analysis indicated a mature state of DN B cells by low CD5, CD10, and CD38 expression. However, the frequency of CD95+ and IgA+ cells was lower in DN versus CSM B cells. DN B cells are Ag experienced, as shown by somatic hypermutation of their Ig genes in adaptive immune receptor repertoire sequencing, although they showed a lower mutation load than CSM B cells. Shared clones were found between DN and CSM B cells, although >95% of the clones were unique to each population, and differences in V(D)J usage and CDR3 physicochemical properties were found. Thus, DN B cells arise in HC and MS patients via a common developmental pathway that is probably linked to immune aging. However, DN and CSM B cells develop through unique differentiation pathways, with most DN B cells representing an earlier maturation state.
A truly duplex renal system
Authors: Sanyika C. , Marishane L.
Published: August 2019

No abstract available.
Standardised ultrasound technique for evaluation of urinary tract infection in South African children highlighting the capabilities and pitfalls of this modality
Authors: Andronikou Savvas , Kader Ebrahim , Welman Chris
Published: August 2019

Urinary tract infection (UTI) is one of the commonest bacterial infections in childhood and has potentially disastrous consequences. The imaging of UTI in children is a controversial subject with divergent imaging protocols existing in the current literature. As ultrasound (US) is a cheap, non-invasive, non-ionizing procedure, it is almost universally accepted as the initial investigation of choice in children with UTI. US reliably demonstrates many important features of the urinary system, including renal size, congenital abnormalities, calculi and, in particular, obstruction to flow of urine (pelvicalyceal dilation). Due to the subjective, user-dependent nature of US, we suggest the adoption of a standardised scanning approach to improve diagnostic accuracy and reproducibility, thereby facilitating patient follow-up. We also hope that standardisation will limit the misinterpretation of US findings that are not evidence-based. This is a pictorial review of the standardised US technique used in the investigation of UTI in children at the Red Cross War Memorial Children's Hospital.
Intertrochanteric stress fracture following the Comrades Marathon
Authors: Drosten Ralph
Published: August 2019

No abstract available.
Tips for the Radiologist: Ultrasound evaluation of occult spinal dysraphism
Authors: Andronikou S. , Smith B.
Published: August 2019

No abstract available.
Tips for the Radiologist: Hypertrophic pyloric stenosis - An overview
Authors: Grove H.
Published: August 2019

No abstract available.
Diagnosis of paediatric Huntington's disease relies on imaging findings
Authors: Andronikou Savvas , Nel Conrad
Published: August 2019

No abstract available.
Obituary: Dr Tobie Rossouw
Authors: Codinho Sheldon , Spiro Farrell
Published: August 2019

No abstract available.
Mounier-Kuhn syndrome: A case study
Authors: Trollip M. J.
Published: August 2019

No abstract available.
Uncommon skeletal findings in systemic sclerosis (scleroderma)
Authors: Van der Walt Betsie , Van de Werke Irma , Lockhat Zarina
Published: August 2019

Scleroderma or progressive systemic sclerosis is a diffuse disease characterised by excessive deposition of collagen and small-vessel arteritis. Systemic sclerosis is divided into two groups.1. Diffuse scleroderma, where interstitial pulmonary fibrosis is common,  and2. The CREST syndrome, which is characterised more commonly by vasculitis with pulmonary hypertension.The CREST syndrome consists of calcinosis of the skin, Raynaud's phenomenon, sclerodactyly, telangiectasis and oesophageal dysmotility.This case describes a 48-year-old woman with known scleroderma demonstrating some of the less common radiological features.
Calcified mitral subannular left ventricular aneurysm
Authors: Van de Werke Irma , Lockhat Zarina , Van der Walt Betsie , Abdullah Rowaida
Published: August 2019

Mitral subannular left ventricular aneurysms are not frequently seen, and those described have occurred mostly in Africa and India. This condition is rare in the Caucasian population.In this case report we describe a mitral subannular left ventricular aneurysm which was calcified, in a pregnant, HIV-positive African woman.This condition should be suspected in patients of African or Indian descent presenting with mitral incompetence and a localised bulge and ring calcification on the left cardiac border on a chest radiograph.
Tips for the Radiologist: Proposed code of practice for radiographers in the event of suspected non-accidental injury (NAI) in children
Authors: Ebrahim N.
Published: August 2019

No abstract available.
Tips for the Radiologist:Why videofluoroscopy?
Authors: Lloyd-Jones A. R.
Published: August 2019

No abstract available.
Computed tomography appearances in paediatric tuberous sclerosis
Authors: Andronikou S. , Welman C. , Kader E. , Joubert R.
Published: August 2019

No abstract available.
Pediatric Neuroimaging
Authors: Andronikou Savvas
Published: August 2019

No abstract available.
Radiological studies of arthritis of the carpo-metacarpal joint of the thumb
Authors: Maritz N. G.J.
Published: August 2019

Osteoarthritis of the trapezio metacarpal joint of the thumb is a common problem. Good X-ray studies will help to demonstrate the problem better and therefore the correct treatment can be applied.
Consent to treatment
Authors: Otto S.
Published: August 2019

The following article serves as a guideline to the radiologist as to when, how and where consent should be obtained. It is clear that the full participation of the patient in decision-making must be obtained and that the right of the person to self-determination is of utmost importance.
An audit of percutaneous biliary stenting for the palliation of pancreatic cancer: Results, post-procedural survival period, and comparison of plastic and mental stents
Authors: Marais M. J. , De Vries C. S.
Published: August 2019

The purpose of this retrospective study was to assess the patient survival period after palliative biliary stenting and to compare different kinds of stents used. During a 27-month period, 60 patients received palliative percutaneous biliary stents for obstructive jaundice due to carcinoma of the head of the pancreas. During the first procedure 17 patients received (metal) Wall stents (mean age 59.8 years, range 32 - 77 years), and 43 patients received (plastic) Carey Coons stents (mean age 62.3 years, range 31 - 87 years). In 12 patients the stent had to be replaced due to complications and 1 patient had a second replacement. All replacement stents were plastic except in 2 cases. Two out of 17 (11.7%) metal stents and 10 out of 43 (23.2%) plastic stents had to be replaced. The median post-procedural survival period was determined between the date of procedure and the date of death. There was a marked clinical improvement of jaundice in all patients with their follow-up within a few days. More plastic stents were replaced. The average post-procedural survival period for 41 patients was 85.6 days, which is on par with internationally accepted survival periods. The most cost-effective biliary stent must be used for palliation because of the very short survival rate of this disease. For patients with no surgical options this procedure yields excellent results in comparison with the high morbidity and mortality rates of palliative surgical bypass procedures.
Technical success rate of uterine artery embolisation for treatment of uterine leiomyomas at the University of the Free State
Authors: Potgieter H. F. , De Vries C. S. , Loggenberg E.
Published: August 2019

The technical success rate of uterine artery embolisations at the Department of Diagnostic Radiology, University of the Free State (UFS) is reported. From November 1998 to July 2001, 67 women, aged 35 - 75 years, received uterine artery embolisation. The procedure was usually performed through a single 4-French sheath set which was introduced into the right femoral artery using a 4- French catheter and injecting PVC particles (150 - 550 micron). Embolisation was performed successfully in 85.5% of the women. The mean total fluoroscopy time was 16.8 minutes, ranging from 4.8 minutes to 47.3 minutes.
Gradenigo's syndrome
Authors: Potgieter P. , Loggenberg E.
Published: August 2019

No abstract available.
Hepatic 'pseudo lesions': Still an unrecognised pitfall
Authors: Duncan Ian C. , Fourie P. A.
Published: August 2019

No abstract available.