bluuebunny/crossref_metadata_2025 huggingface dataset:
Enabling Open and Collaborative Public Service Advertising through Cloud Technologies
Authors: Pop Daniel , Echeverria Alejandro , Petcu Dana , Conesa Gloria
Published: August 2015

The importance of cloud computing and its benefits for public sector has already been recognised by national and supranational organisations. Meanwhile, public service advertising is seen as a powerful tool in the hands of public administrations in raising awareness and changing public behaviour towards a social issue. After introducing the main concepts of cloud computing, this chapter describes an interactive, cloud-enabled platform for public service advertising. During the validation phase, which involved seven European case studies, we learnt not only the benefits for both data producers and consumers coming with the platform, but also helped us identifying the gap between these two sides. In order to bridge this gap we propose a novel, open and collaborative platform for public advertising based on semantic Web technologies for service discovery and message delivery. Enabling technologies of the platform are next identified and, finally, the deployment on hybrid cloud environments is discussed.
Legal Issues Surrounding Connected Government Services
Authors: Kiran Mariam
Published: August 2015

Recent technological advances have led to a knowledge-driven economy, where we expect and need information accessible from anywhere. Connected Government (c-government) enables governments to communicate through technology with their citizens and other governments. The use of ICT and emerging technologies has made this relationship much more effective. Although, most research is focused towards infrastructures and flexible services provision, form, there is a need for a layer of legal regulations to be followed. Legal issues can further aid in the provision of transparency, data confidentiality and encryption techniques. This is where Cloud Computing infrastructures can play an important role. This chapter looks into the Cloud infrastructure and discusses how Clouds are being used for connected government services, while further extending the discussion by looking at the legal issues surrounding the use of Clouds, particularly focusing on the UK G-Cloud as a case study.
Independent Tasks Scheduling using Parallel PSO in Multiprocessor Systems
Authors: Singh Sunil Kumar , Vidyarthi Deo Prakash
Published: August 2015

Multiprocessor system often aims to minimize the schedule length of the submitted jobs. For this, efficient scheduling of the parallel tasks on multiprocessor system is required. As the scheduling is an NP-Hard problem, meta-heuristics are often applied for this. This work applies parallel particle swarm optimization technique for multiprocessor task scheduling. As the scheduler designed using parallel PSO itself can execute in parallel on the multiprocessor systems the convergence is faster. The proposed algorithm takes care of local as well as global convergence. The performance evaluation of the proposed model is done by simulation and the result is quite encouraging.
An Anonymous Email Identification Solution based on Writing Structural Patterns
Authors: Liu Yanhua , Chen Guolong , Zhang Yiyun
Published: August 2015

A method to analyze anonymous emails in digital forensics is presented in this paper. The frequent pattern-growth algorithm is used in the proposed method to analyze an email and obtain the structural email writing pattern of the user. The influence of a user's writing structural pattern on the analysis of an anonymous email varies. The analytic hierarchy process is used to calculate the weight of a user's different writing structural patterns. For a given anonymous email, matching the writing structural pattern and weight calculation can help investigators improve their decision making and determine the author of an anonymous email in forensic work.
A Self-Adaptive Prediction Algorithm for Cloud Workloads
Authors: Mao Li , Qi Deyu , Lin Weiwei , Zhu Chaoyue
Published: August 2015

It is difficult to analyze the workload in complex cloud computing environments with a single prediction algorithm as each algorithm has its own shortcomings. A self-adaptive prediction algorithm combining the advantages of linear regression (LR) and a BP neural network to predict workloads in clouds is proposed in this paper. The main idea of the self-adaptive prediction algorithm is to choose the better prediction method of the future workload. Some experiments of prediction algorithms are conducted with workloads on the public cloud servers. The experimental results show that the proposed algorithm has a relatively high accuracy on the workload predictions compared with the BP neural network and LR. Furthermore, in order to use the proposed algorithm in a cloud data center, a dynamic scheduling architecture of cloud resources is designed to improve resource utilization and reduce energy consumption.
Black Nerds, Asian Activists, and Caucasian Dogs
Authors: Korn Jenny Ungbha
Published: August 2015

This study focuses on modern representations of race on the Internet. As race continues to be used as a meaningful category for understanding the social world, Internet-based displays of racial membership reflect the ongoing significance of race. Concurrent with Facebook's growth in popularity has been the development in ways that racial identity has been expressed online. While Facebook has been the site of study for individual behavior, Facebook Group behavior is still understudied. The author applies the communication theory of identity and self-categorization theory to digital expressions of race as examples of cultural markers of identification. Thematic analysis is used to examine intra-racial and cross-racial variances across cultural groups that are self-identified as White/Caucasian, Black/African-American, and Asian/Asian-American. The results indicate that users of colors create online representations of race that are different and counter to those found in mass media.
Tell China's Story Well?
Authors: Xiong Bingjuan
Published: August 2015

The development of new media transforms human communication experiences in ways that are socially, culturally, and politically meaningful. This study investigates the Chinese government's use of new media in response to an international communication crisis, the Ai Weiwei case, in 2011. Through a discourse analysis of China's official online news website, China Daily, as well as Twitter posts, most salient media frames in China's online media discourse are identified. The results suggest that online contestation of media framing in China's official media discourse contributes to the formation of new cultural expectations and norms in Chinese society and challenges the government's ability to tell its own stories without dispute. The author argues that new media foster online discussion and stimulate public debate of China's accountability and transparency in interacting with domestic and global audiences during crisis communication.
Remaking Ancient Virtues for the Virtual World
Authors: Zhang Fan
Published: August 2015

This article explores the use of communication technology for the dissemination of Buddhist narratives in post-Mao China. It presents a case study of how a thousand-year old Buddhist Longquan Monastery located in the outskirts of Beijing became an avant-garde of modern Buddhism in China with the help of communication technology. The analysis focuses on online rhetoric of Master Xuecheng, the abbot of Longquan and president of China's Buddhist Association, and new media strategies used by the proponents of modern Buddhism to form connections and to create new meaning. The author seeks to determine (a) whether new identities concerning citizenship and nationalism are forged; and (b) whether technology serves as a platform to popularize Buddhism online and offline. The argument is made that by constructing rhetoric that links technology with Buddhism and utilizing new media, the monks of Longquan strive to constitute the religious authority of modern Buddhism and its spiritual leader, Master Xuecheng.
The Effects of Mobile Collaborative Activities in a Second Language Course
Authors: Ilic Peter
Published: August 2015

This research is designed to explore the areas of collaborative learning and the use of smartphones as a support for collaborative learning through a year-long exploratory multiple case study approach integrating both qualitative and quantitative data analysis. Qualitative exploratory interviews are combined with Multidimensional Scaling Analysis to provide a detailed image of students' mobile use during collaborative activities. The Multidimensional Scaling (MDS) reliability is supported by a second resampling that produced similar results independent of time of subjects. The results are triangulated across the qualitative and quantitative data and key issues are interpreted and discussed. The results indicate that the introduction of mobile access collaborative homework to a second language English class in Japan does have observable effects on students, including changes in use of space, time and method for mobile collaborative homework.
Developing Student Oral Presentation Skills with the Help of Mobile Devices
Authors: Gwee Susan , Toh-Heng Hwee Leng
Published: August 2015

Video recording is increasingly used in higher education settings to help students develop their oral presentation skills. However, little is known about the effect of video review for bringing about better high school student outcomes in oral presentation in formal (classroom) and informal (out-of-classroom) settings. Using a quasi-experimental design, this study investigated the effectiveness of using video review in developing the oral presentation skills of Grade 11 students in formal and informal settings in Singapore and how students felt about learning oral presentation skills in these settings. Students who viewed their oral presentations in a formal setting had significantly higher effectiveness of group presentation scores than those who viewed them in informal settings using mobile devices. Their presentations were rated more effective, cohesive, and organised. However, students found viewing their oral presentations in informal settings to be effective, engaging, convenient, and that it provided immediate feedback.
The Graph Signature
Authors: Jarrar Mustafa , Deik Anton
Published: August 2015

Querying large data graphs has brought the attention of the research community. Many solutions were proposed, such as Oracle Semantic Technologies, Virtuoso, RDF3X, and C-Store, among others. Although such approaches have shown good performance in queries with medium complexity, they perform poorly when the complexity of the queries increases. In this paper, the authors propose the Graph Signature Index, a novel and scalable approach to index and query large data graphs. The idea is that they summarize a graph and instead of executing the query on the original graph, they execute it on the summaries. The authors' experiments with Yago (16M triples) have shown that e.g., a query with 4 levels costs 62 sec using Oracle but it only costs about 0.6 sec with their index. Their index can be implemented on top of any Graph database, but they chose to implement it as an extension to Oracle on top of the SEM_MATCH table function. The paper also introduces disk-based versions of the Trace Equivalence and Bisimilarity algorithms to summarize data graphs, and discusses their complexity and usability for RDF graphs.
Comparative Study on Commercial and Corn Cobs Activated Carbon for Removal of Congo Red Dye
Authors: Leelavathy K.R. , Nageshwaran V. , Bharathi M.
Published: August 2015

Garments plays a vital role among the basic needs of human life, hence there are lots of demand and production of dyestuffs every year to colour the fabrics. In the dyeing process 10 to 20% of the dyes are wasted as effluent. Dye laden wastewater is treated by biological or chemical treatment which is found to be inadequate and expensive. In this study, an attempt has been made to prepare an activated carbon from agro-waste based material, Corn Cobs which are abundantly available in Tamil Nadu. Base activation of Corn Cobs was done with ZnCl2 solution for 12 hours and carbonized at 350º C for 2 hours. A kinetic experimental study was carried out for Congo red dye removal. In the preliminary studies both the Commercial Activated Carbon (CAC) and Corn Cobs Activated Carbon (CCAC) with various initial adsorbate concentration of 50, 65, 75, 100 and 125 ppm were considered. For further studies on the effect of various parameters such as the contact time and adsorbent dosage, initial concentration of adsorbate was chosen as 65 ppm. The other experimental parameters such as temperature and initial pH were kept at 27±0.5°C and 6.8±0.2 respectively. The experimental results of both CAC and CCAC were compared. The CCAC showed a removal of 97.8% at an adsorbent dosage of 1.2 g, whereas the CAC showed a removal of 98.1% at a dosage of 0.3 g. The result shows that CCAC has abundant potential for the removal of dye.
Magnetic Field Assisted Electric Discharge Machining of Cryo-Treated Monel 400 Alloy
Authors: Jadhav Rahul R. , Jatti Vijaykumar S. , Singh T.P.
Published: August 2015

Monel alloys are pioneering materials which have exceptional engineering properties such as corrosion resistance, high toughness and show good response to cryogenic treatment. It finds uses in ship building, nuclear aerospace, missile and valve industries. These materials shows strain hardening effect which results in tool wear and in some cases tool breakage when machined by conventional methodshence, unconventional machining such as electrical discharge machining (EDM)discoverspurpose for machining of such materials. Researchers have recognized relation between electrical input process parameters of EDM process and output parameters of EDM process. But researchers have not investigated the influence of external magnetic field and cryo-treatment of work piece on EDM performance measures namely material removal rate (MRR) and tool wear rate (TWR). In vision of this the objective of present work was to study the effect of gap current, external magnetic field and cryogenic treatment of work part on MRR and TWR. Experiments were carried out by creating a 3 mm square hole on Monel400 alloys. Based on experimental results it was found that as gap current increases the MRR and TWR increases for untreated work part. For treated work part MRR increases and TWR decreases with increasein gap current. MRR and TWR increases with constant gap current for untreated work part, as magnetic field increases. For treated work part MRR increases and TWR decreases with increase in magnetic field at constant gap current.
Effect of Thermomechanical Treatment on the Properties of Steel with a Mixed Martensitic-Bainitic Structure
Authors: Popelyukh Albert , Yurkevich Maria , Popelyukh Pavel
Published: August 2015

The structure formation features of steel with 0.4 C, 1.5 Cr, 1.5 Ni, 0.5 Mo (wt. %) after high-temperature thermomechanical treatment with martensite-bainite transformation of austenite was investigated. It was found that a mixed structure consisting of alternating elongated areas of tempered martensite and lower bainite was formed by steel treatment. The proposed treatment can significantly increase impact strength and fracture toughness of steel. This technological process is mostly effective for strengthening alloy steels with increased resistance of under-cooled austenite.
Contact Processes in Grinding
Authors: Yanyushkin Alexander , Lobanov Dmitry V. , Arkhipov Pavel V. , Ivancivsky Vladimir V.
Published: August 2015

The relevance of investigating the problem of loading a diamond abrasive tool with a metallic binder to improve the efficiency of finishing treatment of a wide range of high-strength materials is addressed in the paper. The results of theoretical and experimental studies of the formation of a greasy layer on the surface of diamond wheels in the treatment of high-strength materials are shown. In the theoretical part it is proposed to consider this phenomenon in terms of the equilibrium state of electrochemical potentials at the interface of a diamond wheel and the treated surface. Dependences are revealed that help to determine greasy layer values. The practical part of this work consists in electron-microscopic, spectroscopic and X-ray diffraction studies of wheel specimens with a metallic binder in diamond grinding. Based on the results obtained the composition and structure of a greasy layer are determined. A comparison of the experimental data with the calculated values confirms the adequacy of the proposed theory. The use of combined methods to improve the efficiency of machining high-strength materials is recommended. It can help to reduce the intensity of loading and to improve the cutting properties of diamond abrasive tools with a metallic binder
Fracture Mechanism of Thermomechanically Processed Low-Carbon Steel
Authors: Petrova Nurguyana D. , Ivanov Afanasiy M.
Published: August 2015

The article deals with the fracture mechanism of thermomechanically processed low-carbon steel tested at low temperatures The low temperature impact toughness of the low-carbon Fe360 steel was defined in the initial (as delivered) state and after its combined treatment: quenching and equal channel angular pressing (ECAP) as well as quenching, equal channel angular pressing, and annealing. It was stated that the combination of quenching and the equal channel angular pressing provided higher strength and led to increased resistance to brittle fracture. Post-deformation annealing, due to high ductility of the material, allows for higher values of impact toughness and power intensity of fracture.
Meyer Law Application for Solving Problems of Surface Plastic Deformation by Spherical Indentation
Authors: Ogar Peter , Gorokhov Denis
Published: August 2015

A method for determining contact characteristics occurring in spherical indentation depending on the properties of an elastic-plastic material governed by the hardening Hollomon power law is proposed. In this case the empirical Meyer law relating a spherical indentation load with an indentation diameterdis used. Basically, the Meyer law is not related to the mechanical characteristics of the test material. The study used the relations between the strain hardening exponentnand the Meyer law constant obtained by S.I. Bulychev. The effects of «sink-in / pile-up» are considered. It is shown that there is no need to define Meyer law constants. The scope of application of the proposed equations is defined. A comparison of the results obtained with the published results based on the finite element (FE) analysis is given.
Surface Hardening of Steel by Electron-Beam Cladding of Ti+С and Ti+B4C Powder Compositions at Air Atmosphere
Authors: Mul Daria , Krivezhenko Dina , Zimoglyadova Tatyana A. , Popelyukh Albert , Lazurenko Daria , Shevtsova Lilia
Published: August 2015

Structural investigations of the materials obtained by surface alloying with titanium-containing powder compositions using industrial electron acceleration were carried out. It was revealed that hardened particles of titanium carbides and borides were formed as a result of high-energy treatment. The highest value of materials studied microhardness was about 8.4 GPa. Friction testing against fixed abrasive particles showed that electron-beam cladding of the titanium and graphite mixture conduced to increasing material wear resistance by a factor of three.
The Structure and Corrosion Resistance of the Coatings Obtained by Non-Vacuum Electron Beam Cladding of the Ti-Nb Powder Mixture on a Titanium Substrates
Authors: Polyakov Igor A. , Samoylenko Vitaliy V. , Lenivtseva Olga G. , Golkovski Mikhail G.
Published: August 2015

In this study Ti-Nb coatings formed on the surfaces of cp-titanium plates by electron beam cladding were investigated. It was found that the coatings were characterized by a dendrite structure and a quenched structure was observed in the interdendritic space. The energy dispersive X-ray analysis revealed some differences between the elemental composition of different areas corresponding to dendritic crystals and the space between them. The corrosion resistance of the Ti-Nb alloy obtained on the titanium surface in the concentrated nitric acid was almost 8 times higher than the cp-titanium corrosion resistance.
Wear Resistance of Hypereutectoid Steel Alloyed with Copper and Aluminum
Authors: Stepanova Natalia , Lozhkina Elena , Razumakov Alexey , Losinskaya Anna
Published: August 2015

The structure, mechanical properties and wear resistance of hypereutectoid steel containing 0.09-8.97 wt. %copper were studied. It is found that an increase in copper increases lamellar pearlite microhardness. Triboengineering testings under conditions of sliding friction show that wear resistance of hypereutectoid steel alloyed with 8.97 wt. % copper is ~3.5 times higher than the wear resistance of bronze and by ~23 % higher than the wear resistance of bearing cast iron. Under conditions of friction on fixed abrasive particles a relative wear resistance of the hypereutectoid steel alloyed with copper is ~3 times higher than a relative wear resistance of bronze.
Analysis and Technology of the Bricard Linkage Kinematic Parameters Comparative Experiments
Authors: Yarullin Munir G. , Galiullin Ilnar A. , Mingazov Marat R.
Published: August 2015

The article considers kinematic parameters of the 6R Bricard linkage characteristic point obtained analytically. Computer simulation of this mechanism resulted in diagrams of changes in the special orientation of the coordinate system of the characteristic point and a projection of its velocities to the basic coordinates system. In addition, we developed a prototype model for experimental studies. The difference between data obtained using the experimental model and the data obtained by computer analysis is less than 5%. This article describes the components of the experimental model. Using a stepper motor requires solving additional tasks: resonance, peaks at the first and the last steps, step dividing, ensuring the smooth acceleration of the motor shaft, smooth increasing of the shaft load, etc.
Acoustic and Emission Control of the Hereditable Stress and Strain State of the Metal Surface Layer during Cutting and Surface Plastic Deformation
Authors: Blumenstein Valeriy Yu. , Panteleenko Fyodor I. , Miroshin Igor V. , Ostanin Oleg A.
Published: August 2015

Methods and experimental findings shown describe how mechanical parameters of the surface layer behavior and acoustic emission signals are interconnected.Experimental study was carried out under conditions of simple single-and dual stage compression. Graphic and analytic dependencies between the counting rate of the acoustic emission Ṅ and the shear deformation degree Λ were revealed. The findings describing dual compression show that the acoustic emission method is sensitive to the material stressing history.The dependency of the acoustic emission signal energy on the pre-stressing program was found, which helped establish that, with values of the plasticity reserve depletion being equal for all experimental specimens, the accumulated shear deformation degree Λ was different.The findings describing the hereditable physical state of the strengthened surface layer of parts during cutting and surface plastic deformation are presented in the paper. The study was carried out using the methods of property accumulation control in deformation sites depending on treatment modes with real-time monitoring of acoustic emission signals. A peculiar feature of these methods is the use of visual recording of the metal plastic flow to be further used in calculating the hereditable parameters of the surface layer quality.
A Promising Method for Improving Wear Resistance of Metal Cutting Tools
Authors: Ovcharenko Alexander G. , Kozlyuk Andrey Yu. , Kurepin Mikhail O.
Published: August 2015

Abstract. A promising method for improving wear resistance of metal cutting tools including pre-heating and a subsequent impact of the pulsed magnetic field of high intensity on the cutting tool is proposed. The experimental setup and methods of research are described. Experimental studies of surfaces of carbide reversible cutting plates of the VK8, T15K6 alloy and drills of high speed steel R6M5 to assess the effectiveness of the proposed method were performed. An increase in wear resistance of cutting tools made of the T15K6 hard-alloy plates by 30% and made of the VK8 alloy plates by 13% was revealed while wear resistance of drills made of steel R6M5 increased on average by 58% The proposed method can be of practical interest for hardening the surface of other types of tools and machine parts for further experimental verification.
Forecasting of Machined Surface Waviness on the Basis of Self-Oscillations Analysis
Authors: Belov Evgeny B. , Leonov Sergey L. , Sitnikov Alexander A.
Published: August 2015

The paper states a problem of providing quality of geometrical characteristics of machined surfaces, which makes it necessary to forecast the occurrence and amount of oscillations appearing in the course of mechanical treatment. Objectives and tasks of the research are formulated. Sources of oscillation onset are defined: these are coordinate connections and nonlinear dependence of cutting force on the cutting velocity. A mathematical model of forecasting steady-state self-oscillations is investigated. The equation of the cutter tip motion is a system of two second-order nonlinear differential equations. The paper shows an algorithm describing a harmonic linearization method which allows for a significant reduction of the calculation time. In order to do that it is necessary to determine the amplitude of oscillations, frequency and a steady component of the first harmonic. Software which allows obtaining data on surface waviness parameters is described. The paper studies an example of the use of the developed model in semi-finished lathe machining of the shaft made from steel 40H which is a part of the BelAZ wheel electric actuator unit. Recommendations on eliminating self-oscillations in the process of shaft cutting and defect correction of the surface waviness are given.
Modeling of Deformation Processes for Conditions of Ultrasonic Frequency Impulse Impact on the Surface Layer of Metals and Alloys
Authors: Rakhimyanov Kharis , Rakhimyanov Konstantin , Eryomina Anna
Published: August 2015

The efficiency of applying electrophysical impacts in technological methods of machine part cutting to a great extent depends on the understanding of the processes forming the basis of these impacts. As a rule a specific nature of these processes is characterized by their high intensity, locality of the impact and an impulse mode.The understanding of a certain process is necessary both for its efficient use in technological processes and for the development of new technologies based on the combination with other electrophysical impacts. The paper presents the results of mathematical modeling of deformation processes under ultrasonic frequency impulse plastic impact of a deformer on the surface layer of metals and alloys. Based on the mathematical modeling of the process of ultrasonic deformation of materials, operating parameters of the impact defining the field of application of this method are found. Quantitative relationships between basic characteristics of the deformation process and operating parameters of an ultrasonic impact are established.
Nickel-Based Composition Coating with Titanium Nanoboride
Authors: Efimova Ksenia A. , Galevskii Gennady V. , Rudneva Victoria V. , Kozyrev N.A. , Orshanskaya Eugenia G.
Published: August 2015

Conditions of electrodeposition, the structure and physical-mechanical properties (microhardness, base cohesion, internal stresses, corrosion currents) of nickel-based galvanic composition coatings with nano and micropowders of titanium boride are investigated. It is determined that electrocrystallization of nickel in the presence of boride nanoparticles leads to the formation of coatings with small-sized structural fragments, low porosity and increased physical-mechanical properties. Titanium nanoboride is simultaneously a component of the composition coating and an effective modifier of the nickel matrix. The presence of nanoboride in the electrolyte improves its performance by increasing the allowable upper limit of the cathode current density.
Quality Improvement of Wear-Resistant Coatings in Plasma Spraying Integrated with High-Energy Heating by High Frequency Currents
Authors: Skeeba Vadim Yu. , Pushnin Valeriy , Kornev Dmitry
Published: August 2015

The paper presents the results of metallographic and energy-dispersive studies of a wear-resistant coating structure made from high-chromium cast iron powder in the course of integrated plasma spraying and high-energy heating by high frequency currents (HEH HFC). The problem of determining the intensity and the nature of residual stress distribution in the depth of the hardened layer is solved by the finite element method and ANSYS and SYSWELD software systems. The results of numerical simulations were checked in field experiments using X-ray and mechanical methods for residual stress measurement. An optimum mode of fusion by high-frequency heating (the source specific power qs= (3.0 - 3.2) ∙ 108W / m2, relative velocity of parts Vd= 60 - 80 mm / sec) was determined. In doing so compressive residual voltage (σRS≈ -120 ± 10 MPa) was formed in the surface layer; the coating porosity reduced and the distribution uniformity of microhardness in the depth of the hardened layer improved. It was found that after plasma spraying of the surface of the part was characterized by a sufficiently developed non-uniform topography with a maximum deviation of high-altitude performance PV = 80 - 160 μm and roughness Ra = 25 μm ± 10 μm. After thermal reflow by high-frequency heating, roughness reduced significantly (Ra = 6 μm ± 2 μm) and the homogeneity of the material improved (PV = 4 ... 10 μm).
Elasto-Plastic Properties of Thin-Walled Structures Designed with the SADSF Method
Authors: Markiewicz Ireneusz
Published: August 2015

The paper presents a selected example of investigations, carried out by the author, on complex thin-walled structures [3] that were designed based on the method of statically admissible discontinuous stress fields (the SADSF method, [1,2,4,5]) with the condition of equalized effort in the limit state. The SADSF method is substantiated based on the conclusions that follow on the lower bound theorem of limit analysis, and is an approximate method.
The aim of the investigations was practical verification of solutions of the SADSF method in elasto-plastic and elastic range of stress, because these ranges are not taken into account in the method.
The existing application software of the SADSF method allows one to design very complex thin-walled structures which are free of cardinal errors. Moreover, the method can be easily used by practically any engineer.
Ageing Effect on Air-Conducted Ocular Vestibular Evoked Myogenic Potential
Authors: Kumar Kaushlendra , Bhat Jayashree S. , Sequeira Nimalka Maria , Bhojwani Kiran M.
Published: August 2015

One of the recent diagnostic tests to assess the function of otolithic organs is through vestibular evoked myogenic potential (VEMP) testing. There are equivocal findings on effect of aging on ocular VEMP (oVEMP) parameters with reference to latencies. Hence this study was taken up to investigate the age related changes in oVEMP parameters. This present study considered 30 participants in each age group i.e., young adults, middle-aged adults and older adults. oVEMP were recorded using insert earphone at 100dBnHL at 500hZ short duration tone burst. The results showed in older adult significant difference in response rate, latencies and amplitude as compared to young and middle adult. Hence age should be taken into consideration when interpreting oVEMP results.
Factors contributing to late breast cancer presentation for health care amongst women in Kumasi, Ghana
Authors: Asoogo Comfort , Duma Sinegugu E.
Published: August 2015

Background: Delay in presenting breast cancer for health care is dangerous because it can increase the mortality rate amongst affected women. Delaying health care and treatment makes it difficult to manage advanced breast cancer successfully. Understanding the factors that contribute to delays in presentation for health care can save lives.Objectives: The purpose of the study was to describe the factors which contribute to the latepresentation of Ghanaian women with breast cancer for health care at a tertiary hospital in Kumasi, Ghana.Method: A descriptive qualitative research design was utilised to answer the research question: ‘What factors contribute to presenting with late breast cancer for health care amongst Ghanaian women who were treated for breast cancer at a tertiary hospital in Kumasi, Ghana?’ A sample of 30 women diagnosed with breast cancer and presented with Stage II and Stage III participated in the study. Semi-structured interviews and field notes were conducted for data collection. Content data analysis was used in line with the research question.Findings: Five themes were discovered as findings. These were: lack of knowledge about breast cancer; fear of cancer treatment and its outcomes; poverty; traditional and spiritual beliefs and treatments and caring for others.Conclusions: We recommend the development of breast cancer awareness programmes and health education at primary health care level.
Abraham Malherbe se bydrae tot Hellenistiese filosofie en die vroeë Christendom
Authors: Thom Johan C.
Published: August 2015

Abraham Malherbe’s contribution to Hellenistic philosophy and early Christianity. Abraham J. Malherbe was one of the most influential New Testament scholars of the past half century. He is especially known for his use of Hellenistic moral philosophy in the interpretation of New Testament texts, especially Pauline literature. Whilst the comparative study of New Testament and Greco-Roman material remains a contentious approach in scholarship, Malherbe’s work provides important pointers in how to make such comparisons in a meaningful and reasoned manner, by paying due respect to the integrity of the texts being compared and to the function textual elements have within their own contexts. I discussed the salient features of Malherbe’s approach, focusing in particular on his study of topoi. One of the most significant findings was Malherbe’s emphasis on the dialectical combination of common and individual elements in such topoi, which enabled ancient authors to embed their own texts within the cultural discourse of their time. His approach opens the way to further research of the New Testament within its philosophical context without requiring proof of a genealogical relationship between the texts or authors concerned.
Being together in youth worship: An empirical study in Protestant Dutch contexts
Authors: Sonnenberg Ronelle , Nel Malan , De Kock Jos , Barnard Marcel
Published: August 2015

In a qualitative empirical research project on youth worship, we discovered that ‘being together’ is primary quality of youth worship. This primary quality consists of at least four aspects. Firstly, community is celebrated through physical presence. More specifically, the physical presence of siblings plays an important part in the participation of youth in worship. Secondly, an empathetic and emotional aspect is essential for adolescents. ‘Being together’ in youth worship means being together in unity and trust and in equality, as kindred spirits. Thirdly, ‘being together’ in youth worship yields possibilities to cross social and ecclesiological boundaries. Fourthly, there is a theological aspect in ‘being together’ that could be described as ‘sharing faith and being in God’s presence’.
The Social Gospel movement revisited: Consequences for the church
Authors: Jacobs Pierre
Published: August 2015

This article introduces South African churches to the reasons why elements of the late 19th and early 20th century Social Gospel movement encourages local churches to participate in their respective communities through social contribution. The article argues that the Social Gospellers understood Christian responsibility as an imperative of ‘participatio Jesu’ through social integration of living an ethos of oikoumenē. The history of the Social Gospel should be a relevant influence on mainline churches to understand the tension in the decision to participate or withdraw from social contribution today.
Editorial foreword
Authors: Janse van Rensburg Fika , Tolmie D. Francois
Published: August 2015

No asbstract available.
Redaksionele voorwoord
Authors: Janse van Rensburg Fika , Tolmie D. Francois
Published: August 2015

No abstract available.
Development of Family Medicine training in Botswana: Views of key stakeholders in Ngamiland
Authors: Ogundipe Radiance M. , Mash Robert
Published: August 2015

Background: Family Medicine training commenced in Botswana in 2011, and Maun was one of the two sites chosen as a training complex. If it is to be successful there has to be investment in the training programme by all stakeholders in healthcare delivery in the district.Aim: The aim of the study was to explore the attitudes of stakeholders to initiation of Family Medicine training and their perspectives on the future roles of family physicians in Ngami district, Botswana.Setting: Maun and the surrounding Ngami subdistrict of Botswana.Methods: Thirteen in-depth interviews were conducted with purposively selected key stakeholders in the district health services. Data were recorded, transcribed and analysed using the framework method.Results: Participants welcomed the development of Family Medicine training in Maun and expect that this will result in improved quality of primary care. Participants expect the registrars and family physicians to provide holistic health care that is of higher quality and expertise than currently experienced, relevant research into the health needs of the community, and reduced need for referrals. Inadequate personal welfare facilities, erratic ancillary support services and an inadequate complement of mentors and supervisors for the programme were some of the gaps and challenges highlighted by participants.Conclusion: Family Medicine training is welcomed by stakeholders in Ngamiland. With proper planning introduction of the family physician in the district is expected to result in improvement of primary care.
Knowledge management a competitive edge for law firms in Botswana in the changing business environment
Authors: Fombad Madeleine
Published: August 2015

Background: Law firms in Botswana offer a particularly interesting context to explore the effects of transition in the knowledge economy. Acquiring and leveraging knowledge effectively in law firms through knowledge management can result in competitive advantage; yet the adoption of this approach remains in its infancy. Objectives: This article investigates the factors that will motivate the adoption of knowledge management in law firms in Botswana, and creates an awareness of the potential benefits of knowledge management in these firms.Method: The article uses both quantitative and qualitative research methods and the survey research design. A survey was performed on all 115 registered law firms and 217 lawyers in Botswana. Interviews were conducted with selected lawyers for more insight. Results: Several changes in the legal environment have motivated law firms to adopt knowledge management. Furthermore, lawyers appreciate the potential benefits of knowledge management. Conclusion: With the rise of the knowledge-based economy, coupled with the pressures faced by the legal industry in recent years, law firms in Botswana can no longer afford to rely on the traditional methods of managing knowledge. Knowledge management will, therefore, enhance the cost effectiveness of these firms. Strategic knowledge management certainly helps to prepare law firms in Botswana to be alive to the fact that the systematic harnessing of legal knowledge is no longer a luxury, but an absolute necessity in the knowledge economy. It will also provide an enabling business environment for private sector development and growth and, therefore, facilitate Botswana’s drive towards the knowledge-based economy.
Setswana proverbs within the institution of lenyalo [marriage]: A critical engagement with the bosadi [womanhood] approach
Authors: Mothoagae Itumeleng D.
Published: August 2015

Setswana proverbs point to the rich oral history of the Batswana people, their cosmology, morality, indigenous knowledge system, rituals, drama, sayings and memo scripts which are deeply embedded in memory. They emerged from reflections on existential experiences and animal behaviour. In her analysis of Proverbs 31:10�31 found in the Hebrew text, Masenya rereads this text in conjugation with her Northern Sotho proverbs regarding women from a bosadi [womanhood] approach. It is in this approach that she attempts to engage structures of �patriarchy� and the marginalisation of women�s identities. In so doing, the approach grapples with issues such as the mythological thinking of male dominance, cultural subjugation, gender equality, political marginalisation and economic transaction. The decolonial turn as a theoretical framework acknowledges the particularity and universality of cultures and knowledge. Whilst there is particularity among African cultures, there is also universality. In this article I will refer to Setswana proverbs in the context of marriage to engage the bosadi approach. It is the intention of this article to argue that proverbs such as lebitla la mosadi ke bogadi need to be contextualised within their historical location as well as within the context of the institution of lenyalo that is anchored in the practice of bogadi. Furthermore, there is a need to critically engage with terms such as patriarchy, oppression, structure and hierarchy. The paper will use the decolonial turn as a theoretical framework. A conclusion will be drawn from the discussion above.Intradisciplinary and/or interdisciplinary implications: This article has an interdisciplinary approach, it touches on Historical analysis of Setswana Proverbs, the missionary era and the transition between �Setswana traditional� worldview and �Euro-Christian� worldview. Furthermore, it pertains to the understanding of the Proverbs within the custom of Lenyalo (marriage), boarders between anthropological, sociological and African philosophy approaches. The fundamental theoretical approaches used in this article is translational theory and decolonial turn, which is social sciences.
A Case of Secondary Angiosarcoma of the Breast after Breast-conserving Surgery and Radiation: Review of Radiologic and Pathologic Findings
Authors: Eppelheimer Christine N , Marti Jennifer L , Eisenberg Amanda , Gan Qiong , Shabalova Rena , Cohen Jean-Marc , Fulop Tamara
Published: August 2015

Angiosarcoma of the breast is a rare and potentially life-threatening disease. It can present as a palpable mass or subtle erythematous lesion, depending on the predisposing clinical factors. Erythematous skin lesions may be confused for a benign process, which may lead to a delay in diagnosis. We present a case of an 80-year-old woman who developed secondary angiosarcoma after undergoing breast-conserving therapy for Stage IA breast cancer. In this article, we review our experience with a case of secondary angiosarcoma of the breast and discuss the presentation, evaluation, and treatment of this disease. This case demonstrates the importance of vigilance regarding erythematous or papular breast lesions in the setting of prior local radiation.
Intrapetrous Anastomosis between the Internal Jugular Vein and the Superior Petrosal Sinus: Cone Beam Computed Tomography Incidental Finding
Authors: Sepúlveda Ilson , Schmidt Thomas , Platín Enrique
Published: August 2015

This is a case report of a 62-year-old male who presented to the Ear, Nose, and Throat clinic for a follow-up exam for hearing loss stemming from a fall from a horse in his infancy. A Cone Beam Computed Tomography (CBCT) examination revealed an intrapetrous communication between the internal jugular vein bulb and the superior petrosal sinus. Three-dimensional bone and soft tissues volume renderings were generated to demonstrate this incidental anatomical variant.
Identification of Cardiac and Aortic Injuries in Trauma with Multi-detector Computed Tomography
Authors: Shergill Arvind K , Maraj Tishan , Barszczyk Mark S , Cheung Helen , Singh Navneet , Zavodni Anna E
Published: August 2015

Blunt and penetrating cardiovascular (CV) injuries are associated with a high morbidity and mortality. Rapid detection of these injuries in trauma is critical for patient survival. The advent of multi-detector computed tomography (MDCT) has led to increased detection of CV injuries during rapid comprehensive scanning of stabilized major trauma patients. MDCT has the ability to acquire images with a higher temporal and spatial resolution, as well as the capability to create multiplanar reformats. This pictorial review illustrates several common and life-threatening traumatic CV injuries from a regional trauma center.
Radiologic-Pathologic Correlation: Metastatic Pulmonary Epithelioid Hemangioendothelioma of Bone Primary
Authors: Lee Christine U , Zreik Riyam T , Boland Jennifer M , White Mariah L
Published: August 2015

Epithelioid hemangioendothelioma is a rare vascular malignancy often characterized by a clinically indolent course and delayed diagnosis. The authors present the radiologic and pathologic features of a case of pulmonary epithelioid hemangioendothelioma which was initially thought to be calcified granulomas.
Bilinear and Quadratic Forms on Rational Modules of Split Reductive Groups
Authors: Garibaldi Skip , Nakano Daniel K.
Published: August 2015

The representation theory of semisimple algebraic groups over the complex numbers
(equivalently, semisimple complex Lie algebras or Lie groups, or real compact Lie groups) and the
questions of whether a given complex representation is symplectic or orthogonal have been solved
since at least the 1950s. Similar results for Weyl modules of split reductive groups over fields of
characteristic different from z hold by using similar proofs. This paper considers analogues of these
results for simple, induced, and tilting modules of split reductive groups over fields of prime characteristic as well as a complete answer for Weyl modules over fields of characteristic 2.
On McMullen-like mappings
Authors: Garijo Antonio , Godillon Sébastien
Published: August 2015

We introduce a generalization of particular dynamical behavior for rational maps. In 1988, C. McMullen showed that the Julia set of

f_{\lambda}(z)=z^n+\lambda/z^d

for

|\lambda|\neq 0

small enough is a Cantor set of circles if and only if

1/n+1/d<1

holds. Several other specific singular perturbations of polynomials have been studied in recent years, all have parameter values where a Cantor set of circles is present in the associated Julia set. We unify these examples by defining a McMullen-like mapping as a rational map

f

associated to a hyperbolic post critically finite polynomial

P

and a pole data

\mathcal D

where we encode the location of every pole of

f

and the local degree at each pole. As for the McMullen family

f_{\lambda}

, we characterize a McMullen-like mapping using an arithmetic condition depending only on

(P, \mathcal D)

. We show how to check the definition in practice providing new explicit examples of McMullen-like mappings for which a complete topological description of their Julia sets is made.