bluuebunny/crossref_metadata_2025 huggingface dataset:
La metonimia en los discrusos informativos
Authors: Toro Hernán
Published: July 2017

El presente trabajo intenta mostrar de qué manera la metonimia, figura principalísima de la Retórica, opera en los discursos informativos, en particular en el discurso de la televisión, para producir efectos de sentido. Este recurso retórico se inscribe en una estrategia más amplia de establecimiento de sentidos en las sociedades,cuya hegemonía trata de ser legitimada a través de las percepciones de los acontecimientos. La metonimia es, según el autor, el mecanismo principal para fijar los sentidos sociales a través de los discursos informativos.
Un cruce de caminos en la producción audiovisual. Conversación con Oscar Campo y Antonio Dorado
Authors: Toro Hernán
Published: July 2017

Esta conversación fue sostenida entre Hernán toro, Julian Gonzáles y Patricia Alzate, miembros del Comité Editorial de la revista Nexus, con los cineastas, documentalistas y profesores de la Escuela de Comunicación Social de la Universidad del Valle Oscar Campo y Antonio Dorado en Cali, en diciembre de 2005.
Producción documental en los años noventa
Authors: Gutiérrez Andrés Felipe , Aguilera Toro Camilo
Published: July 2017

Los autores hacen un inventario crítico de la evolución del documental en Colombia en la década de los 90 e intentan levantar una cierta tipología que ordene de manera más racional esa explosión productiva. Este trabajo (publicado originalmente en“Cuadernos de cine colombiano” ¡f5) tiene en cuenta la incidencia del desarrollo tecnológico y las diversas variables sociopolíticas y económicas que predominaron en Colombia en el periodo seleccionado y la evolución del medio televisivo mismo, sobretodo en lo relativo a la eclosión de canales regionales, para afianzar de manera más argumentada sus presunciones.
Comunicación y desarrollo social: entre el "terrorismo" y la agudización de la pobreza
Authors: Hleap José
Published: July 2017

Este texto revisa la relación comunicación -desarrollo desde el punto de vista de las concepciones del posdesarrollo y de las mediaciones sociales que ubican al comunicador como reeditar social, precisamente encargado de ese trabajo inmaterial de construcción de “lo común”, que articula sentidos, relaciones y afectos. En esta perspectiva hablo de la relación entre el saber experto y el saber común, en momentos en que estos conocimientos sociales están siendo privatizadas por patentes y derechos de autor que omiten su origen colectivo.
Presentación
Authors: Toro Hernán
Published: July 2017

La escuela de Comunicación Social de la Universidad del Valle espera iniciar con este número de Nexus una etapa larga y estable de una publicación que refleje la gran diversidad de percepciones que existen en torno a los problemas relativos a la comunicación social.
FORMULASI KEBIJAKAN SISTEM TRANSPORTASI LAUT
Authors: Kadarisman Muh , Yuliantini Yuliantini , Majid Suharto Abdul
Published: July 2017

The aims of this research is to analyze the policy of sea transport in the realization of modern sea toll transportation and development. The research uses descriptive-qualitative. The result shows: 1) government’s policy regarding sea toll is to ship transport, guarantee the availability of goods, reduce disparity cost and ensure continuity service transport of goods to regional, remote, outermost and border; 2) sea transport development policy is to enhance the role of national shipping leet both domestic and export-import transportation by imposing cabotage principle; abolish unoficial charges in ports through improved coordination of all relevant institutions and the process of loading and unloading goods that meet international shipping standards and the implementation of the International Ship and Port Security; restructure shipping legislation and its implementation, as well as institutional sub-sector of sea transport in order to create conditions that will attract private investment in the construction of sea transportation infrastructure; 3) sea transportation policy is set to increase nasional development to transport people, goods and information. This policy functions as supporting system to achieve the optimum allocation of economic resources in order to provide equitable, and affordable purchasing power services.
KUALITAS PELAYANAN JASA KEAGENAN KAPAL DAN KOMUNIKASI INTERPERSONAL PADA PERUSAHAAN PELAYARAN
Authors: Pangihutan Anton , Thamrin Muhammad , Suparman Asep
Published: July 2017

The study aimed to analyze the relationship of services quality of ship agency, interpersonal communication with user satisfaction in PT Buana Listya Tama, both partially and simultaneously. The research uses quantitative methods by doing survey, and the data were analyzed using correlation and regression. The results show that the variables of interpersonal communication and service quality have a significant relationship either partially or simultaneously with customer satisfaction. Variable quality of service has a positive and significant correlation with t value of 4.905 and greater than t table of 1.998 so that Ho is rejected and Ha is accepted. Interpersonal communication variables also has a positive correlation with customer satisfaction with the value of tcount equals to 6,108 and greater than t table of 1.998 so that Ho is rejected and Ha is accepted. Through the F test it is found that the quality of service and interpersonal communication are simultaneously correlated with satisfaction where the F count is larger than F table (90.839> 2.75) so that Ho is rejected and Ha is accepted. The coefficient of determination (R Square) between variables is 0.749 or 74.9%. The amount of the contribution of service quality and interpersonal communication on customer satisfaction is 74.9%, whereas 25.1% influenced by other factors not examined.
VALUE ENGINEERING DAN STRATEGI BISNIS PADA PT ANGKASA PURA II
Authors: Priyanto Slamet , Suharno Hadi , Haryono Haryono
Published: July 2017

This research aims to determine the business model that is currently running, knowing Maps Strategy and Operation Process Map companies towards World Class Airport Company, then analyzing step Value Engineering up to level 1 (one) that needs to be done to improve the strength of the company. The method used is descriptive qualitative and quantitative methods are combined with observations and structured interviews so as to portray phenomena that there is both natural and human engineering. The implementation strategy of Value Engineering on this research, expected changes in the strength of the company to be much better in the period 2015-2016 exceeded even the expectations that have been established in 2012-2016 RJPP PT Angkasa Pura II (Persero).
PENERAPAN GOOD LOGISTIC PRACTICES UNTUK PRODUK PERIKANAN
Authors: Rahayu Winiati Pudji , Adhi Wibisono
Published: July 2017

The utilization of Indonesia’s fisheries potential should be supported by the development of fisheries industry, more specifically by the improvement on fisheries supply chain management. It is needed to preserve the quality and safety of fisheries product from sea to consumers’ table and the sustainable fisheries supply. The fisheries product is perishable therefore the appropriate handling and full controlled process are needed to maintain product quality and safety. In fisheries industry, quality and safety can be maintained by applying good logistic practices (GLoP). GLoP is best practices ofcold chain management supported by quality and safety control system such as good manufacturing practices (GMP), standard sanitation operating procedure (SSOP) and hazard analysis critical control point (HACCP). On the other hand, the sustainability of fisheries supply canbe achieved by applying full controlled resources management. The commitment and cooperation of all parties on fisheries industry, as well as the standard implementation of fishery management is needed to improve quality and quantity of Indonesia’s fisheries products.
MANAJEMEN PEMELIHARAAN BUS TRANSJAKARTA DALAM MENCAPAI STANDAR PELAYANAN MINIMUM
Authors: Ismiyati Ismiyati , Firdaus Miskul , Arubusman Dian Artanti
Published: July 2017

This study aims to analyze the operational management system to improve the Transjakarta bis maintenance needs of safety and comfort for the user community. The method used is qualitative descriptive method. Results of the study: 1. Implementation of busway that has been and are going to be implemented by the local government of DKI Jakarta through the Department of Transportation (Dinas Perhubungan) and the Agency of Busway management (BP) has met the expectation like infrastructure such as ticketing system, bis stops, bis facilities, human resources and publications, 2. Performance in implementating busway program, in general has shown its satisfaction level. Busway is considered as an alternative public transport that is safe, comfortable and punctual, 3. Evaluation of the implementation of the busway program since last year have shown satisfying results. Busway passengers are around 17.4 million. 7.6 percent has shifted from private transportation to busway. It is higher than the average of shift rate in the world that is only 4 to 5 percent. The income from this program in 2015 for DKI Jakarta is Rp. 42.7 billion and it also has successfully changed people's attitude to use public transportaion. However, congestion problem is not significantly decreased.
PENERAPAN SAFETY MANAGEMENT SYSTEM PADA LEMBAGA PENYELENGGARA PELAYANAN NAVIGASI PENERBANGAN INDONESIA
Authors: Fiyanzar Adin Eka , Nusraningrum Dewi , Arofat Osman
Published: July 2017

This study aimed to analyze the effect of the implementation of Safety Management System (SMS) and the use of information system on the Flight Safety in the Indonesian Air Navigation Services Organization both partially and simultaneously. The research uses quantitative methods, and the data are analyzed using linear regression, simple correlation both partially and simultaneously and path analysis. The result shows; implementation of Safety Management System (X1) as measured by the Flight Safety (Y) has a positive and significant contribution on the level of Flight Safety.  The amount of the application contribution of Safety Management System that directly contributes to the Flight Safety is 35.4%, so the research hypothesis which states that the Safety Management System application directly impacts significantly on Aviation Safety is accepted; the use of Information Systems (X2) as measured by the Flight Safety (Y) has a positive and significant contribution on the level of Flight Safety. The use of information systems contributions that directly contributes to aviation safety is 38.4%, so the hypothesis which states that the use of information system directly affects significantly the flight safety is acceptable; the total effect of simultaneous application of Safety Management System (X1) and the use of Information Systems (X2) contribute significantly to the Flight Safety (Y) as much as 66.3%. The remaining 33.7% is the influence of the other factors such as refresher and development training for air navigation personnel, aviation navigation equipment renewal and observation flight
FAKTOR PENYEBAB IRREGULARITIES PENANGANAN OPERASIONAL PESAWAT MEDICAL EVACUATION DI BANDARA HALIM PERDANAKUSUMA
Authors: Effendi Mustika Sari
Published: July 2017

This research aimed to analyze the causes of irregularities on airplane medical evacuation (medevac) handling and find the solution and effective action. Method used in this research is fishbone. The results show that there are 13 factors causes the irregularities which are the age of GSE is over 20 years old, the Medevac Standard Operating Procedure (SOP), briefing and debriefing activity, documentation, diesel fuel, spare part, office utility, employees’ recruitment, career path, training, operational cost, salary increases, and bonus. The solutions are that at the beginning of recruitment the company should tell the new employee about the employment status, periodic increment, and training, for the company fuel storage, the company should socialize the rules of work safety by conducting safety campaign program periodically, for documentation, it is better for the operation administrator to document and jot down all operational activities, meanwhile for the night-shift employee should be changed with different people, for the spare part, there should be some spare stored in GSE warehouse, about the SOP, the company should make special SOP for medevac activities, office utility should be updated with the newest technology, and for GSE equipment, there should be budget to buy new GSE equipment
KUALITAS PELAYANAN DOKUMEN DAN KECEPATAN BONGKAR MUAT GENERAL CARGO
Authors: Umagapi Brata Wuntara , Amonalisa Siska , Lesmini Lies
Published: July 2017

The study’s objective is to analyze the relationship of the documents service quality (X1) and the speed of loading and unloading of general cargo (X2) with service user satisfaction (Y) in PT Tubagus Jaya Maritim. This research uses quantitative methods, with a population of 67 consumers of PT Tubagus Jaya Maritim and the sample is 30 consumers. Data is analyzed using multiple regression and multiple linear regression, simple correlation and partial correlation. Results: 1. There is a correlation between the documents service quality with the service user satisfaction with r score of 0.794 meaning there is a very strong and positive relationship, and the regression hypothesis shows that there is significant relationship as t-score is greater than t table (10.529> 1.669) or hypothesis H1 is accepted. 2. The correlation between the speed of loading and unloading of general cargo with service user satisfaction obtained r score of 0.651 which means there is a strong and positive relationship, and the hypothesis of regression showed a significant relationship that t-score is greater than t-table (6.914> 1.669) or hypothesis H2 is accepted. 3. The results of correlation between the documents service quality and the speed of loading and unloading of general cargo together with service user satisfaction obtains r score of 0.814 which means the relationship is very strong and positive, and F-score is larger than F table (62.871> 3.140) or the research hypothesis H3 is accepted.
ENSIKLOPEDIA ALAT TRANSPORTASI JAKARTA BERBASIS AUGMENTED REALITY
Authors: Dharmayanti Dharmayanti , Permana Dimas Dwi , Elvina Elvina
Published: July 2017

This writing explains about encyclopedia book of Jakarta’s Means of transportation using augmented reality technique. This encyclopedia book consists of 7 (seven) sheets which each one discusses about the Jakarta’s means of transportation with a marker named QR-code. Each marker on each sheet shows a means of transportation model in 3D (dimension) along with the animation. This book is made by using library AR Toolkit software. Blender 2.64 application is used to make the 3D Jakarta means of transportation, meanwhile Adobe Photoshop CS4 is used to make the marker. The output of this application is 3D vehicle models with animation that can be seen when webcam is pointed to the marker. This application is made as a new learning and introduction media for the society especially kids to know more about means of transportation operated in Jakarta.
LOYALITAS PELANGGAN PADA PERUSAHAAN FREIGHT FORWARDING
Authors: Sabatini Lidya Nurlita , Ardiana I Made , Prasetya Oce
Published: July 2017

The objective of this study  is to determine the influence of service quality and brand images to customer satisfaction and its impact on customer loyalty in PT Freight Solution Indonusa. The research population is all the customers export and import 200 customers. Number of sample is using Slovin formula 133 customers. The data obtained and collected through the instrument by a questionnaire using a Likert scale. The data, then analyzed using path analysis. The results of the calculation and the test data can be concluded that quality of service and brand image  influenced on customer satisfaction and  have an impact on customer loyalty. Therfore, the quality of service and a good brand image will create customer satisfaction and  enhance customer loyalty.
PROFESIONALISME KERJA DAN KUALITAS PELAYANAN PT POS INDONESIA
Authors: Widodo Erna Sulistyanti
Published: July 2017

The aim of this research is analyzing correlation between professionalism and service quality against the customer satisfaction. This research applied descriptive quantitative by using path analysis and regression analysis. This result shown us: 1) there is positive direct effect between professionalism against customer satisfaction. It shows that employee professionalism has positive impact to increase customer satisfaction. 2) there is positive direct effect between service quality against customer satisfaction. It shows that a good service quality will contribute positive impact to increase customer satisfaction. 3) there is positive direct effect between professionalism against service quality. This effect will show that implementation of professionalism has positive impact for better service quality.
PENERAPAN SAFETY MANAGEMENT SYSTEM (SMS) DAN KOMPETENSI PEMANDU LALU LINTAS PENERBANGAN
Authors: Melissa Anaria Carini , Subagyo Toto Hardiyanto , Suharno Hadi , Majid Suharto Abdul
Published: July 2017

The objective of the research is to analyze  the influence between Implementation of Safety Management System (SMS) and Competency of Air Traffic Controller towards  Aviation Safety at Perum LPPNPI Main Branch JATSC.  Type of research is quantitative research by means of surveys, where data obtained through a questionnaire that will be distributed On Air Traffic Controller Perum LPPNPI Main Branch JATSC. The population in this research is an Air Traffic Controller Perum LPPNPI Main Branch JATSC totaled 356 (Three Hundred and Fifty Six) people. The sample taken is 100 (hundred) people. Data collected through the instrument in the form of a questionnaire.  Methods of data analysis performed in this study using correlation and regression.  The results of data analysis can be concluded that : (1) Implementation of  Safety Management System (SMS) has a positive and significant impact on Aviation Safety (2) Competency of Air Traffic Controller has a positive and significant impact on Aviation Safety (3) Implementation of the Safety Management System (SMS) and Competency of Air Traffic Controller has positive and significant impact together on Aviation Safety. The implications of the research are Aviation Safety can be improved by upgrading Implementation of Safety Management System (SMS) and Competency of Air Traffic Controller.
MANAJEMEN OPERASIONAL DI PELABUHAN NUSANTARA KENDARI
Authors: Werweti Werweti , Sukardiman Tjuk , Suhalis Adenan
Published: July 2017

The purpose of this study was to determine the relationship of operational management and service to customer satisfaction in the port of the archipelago Kendari. To collect the data, this study used a questionnaire method / inquiry tangible items of questions. This questionnaire distributed to companies who become customers Kendari port of the archipelago. The population in this study is the customer service users Nusantara Port Kendari. Testing the quality of the data using validity and reliability test and classical assumption. While the analysis model used in this study using multiple linear regression analysis, T test, F test, test the coefficient of determination. The results showed that: 1. In the individual variable operational management and service a significant effect on customer satisfaction in the port of the archipelago Kendari. T test results gained tcount accepted at significance level of 5%; 2. Taken together operational management and service variables significantly influence customer satisfaction in the port of the archipelago Kendari. F assay results received grades of F = 97.224 accepted at significance level of 5%; 3. The operational management of the dominant influence on customer satisfaction, compared to the variable service. T-test results for the variable gain tcount operational management (11.055) higher than the variable tcount services (9.913) at the 5% significance level.
PERAN TRANSPORTASI DALAM MENDUKUNG KAWASAN STRATEGIS PARIWISATA NASIONAL DANAU TOBA
Authors: Sitorus Budi , Sitorus Christina Natalia
Published: July 2017

The research objective is to identify and analyze the development problems of Lake Toba regional and support the accelerated development. The results are on the development of tourism region of Lake Toba of which improve accessibility and connectivity of transport from / to the tourist locations around the area of Lake Toba to build toll roads Kualanamu- Parapat, Silangit-Parapat and feeder roads as well as liaison adequate and smooth traffic, safe, congratulations. This research is Qualitative descriptive using a qualitative analysis approach and public policy analysis to find the steps of developing national tourism strategic areas.
AN INVESTIGATION OF EMPLOYEE MOTIVATION IN INTERNATIONAL NON-GOVERNMENTAL ORGANIZATIONS IN CHIANG MAI, THAILAND
Authors: Elizabeth Meister
Published: July 2017

This research investigates the key motivating factors of Thai employees at international non-governmental organizations (NGOs) in Chiang Mai, Thailand. The results show that both intrinsic (x̅=3.02) and extrinsic motivation (x̅=2.50) affect these employees (on a Likert scale of 1 to 4). Importantly, the charitable purpose of the NGO has a clear bearing on the motivation of employees, as reported by 94.7% of respondents. The respondents’ preferences for increasing knowledge (x̅=3.57), enjoyment (x̅=3.52), gaining new experience (x̅=3.20), and clarity in the workplace (x̅=3.51) are demonstrated to be deeply rooted in Thai culture, as is their aversion for competition (x̅=1.79), complex problem solving (x̅=2.62), and individual credit (x̅=1.56). Suggested areas of focus for NGO management are outlined in a 15-point recommendation list.

Keywords: Non-Governmental Organization, Employee Motivation, Chiang Mai, Thailand
John Marshall, l'Autochtone et la concrétisation d'un fédéralisme
Authors: Bergeron David
Published: July 2017

Pour John Marshall, le développement national passe par des modalités fédérales. Ses cas amérindiens le démontrent. La doctrine de la Découverte reconnaît à l'Union la propriété et la préemption sur le territoire, et à l'Autochtone un droit territorial en tant qu'occupant originel. Le statut de nations domestiques dépendantes pourvues d'une souveraineté inhérente accroît ce rapport de l'État fédéral avec l'Amérindien. Mais si l'argumentaire politique assoit pouvoir, propriété, préemption et également protection face aux états, c'est l'incompatibilité du mode de vie et du rapport qu'entretient l'Amérindien au territoire qui concrétisent cette mainmise fédérale en justifiant tant d'extérioriser juridiquement et politiquement la tribu que de s'approprier son territoire et de la dominer. Ce travail permet de démontrer à quel point l'axiologie libérale imprègne les représentations aux États-Unis. La jurisprudence de Marshall soutient un fédéralisme tant à partir du fait politique que du droit naturel au fondement de l'Amérique et de son projet libéral.
Use of Bridge Element Condition Reports to Measure Performance of Bridge Preservation
Authors: Hearn George
Published: July 2017

A method to measure the performance of bridge preservation through the use of bridge–level element condition reports is demonstrated. The performance measure makes bridge-by-bridge evaluations of the relative conditions of elements that are major assemblies of bridges and elements that affect the exposure of major assemblies to deterioration. In an evaluation of performance, a bridge can be in a state of good preservation, at risk of deteriorating to poor condition, or already in poor condition. Bridge condition reports from 50 U.S. states are used in this evaluation of the performance of bridge preservation. The bridge element reports conform to the FHWA specification for bridge element reports and employ AASHTO national bridge elements and bridge management elements. Bridge preservation is good for 53% of National Highway System bridges by deck area. The performance of preservation is evaluated for major assemblies of bridges and for bridge construction materials in relation to coatings, wearing surfaces, and joints.
Novel Analysis of the Multiwavelength Structure of the Relativistic Jet in Quasar 3C 273
Authors: Marchenko Volodymyr , Harris D. E. , Ostrowski Michał , Stawarz Łukasz , Bohdan Artem , Jamrozy Marek , Hnatyk Bohdan
Published: July 2017

We present a detailed analysis of the best-quality multiwavelength data gathered for the large-scale jet in the core-dominated quasar 3C 273. We analyze all the archival observations of the target with the Chandra X-ray Observatory, the far-ultraviolet observations with the Hubble Space Telescope, and the 8.4 GHz map obtained with the Very Large Array. In our study, we focus on investigating the morphology of the outflow at different frequencies, and therefore we apply various techniques for the image deconvolution, paying particular attention to a precise modeling of the Chandra and Hubble point-spread functions. We find that the prominent brightness enhancements in the X-ray and far-ultraviolet jet of 3C 273—the “knots”—are not point-like, and can be resolved transversely as extended features with sizes of about

. Also, the radio outflow is wider than the deconvolved X-ray/ultraviolet jet. We have also found circumstantial evidence that the intensity peaks of the X-ray knots are located systematically upstream of the corresponding radio intensity peaks, with the projected spatial offsets along the jet ranging from

up to

. We discuss our findings in the wider context of multi-component models for the emission and structure of large-scale quasar jets, and speculate on the physical processes enabling an efficient acceleration of the emitting ultrarelativistic electrons along the entire jet length that exceeds 100 kpc.
Five new species of Vibrissina Rondani (Diptera: Tachinidae) from Area de Conservación Guanacaste in Northwestern Costa Rica
Authors: Fleming AJ , Wood D. Monty , Smith M. Alex , Dapkey Tanya , Hallwachs Winnie , Janzen Daniel
Published: July 2017

We describe five new species in the genus Vibrissina Rondani from Area de Conservación Guanacaste (ACG). All species were reared from wild-caught sawfly larvae (Hymenoptera: Symphyta: Argidae and Tenthredinidae). We provide a morphological description of each species together with information on life history, molecular data, and photographic documentation.

Five new species of Vibrissina Rondani: Vibrissina randycurtisi sp. n., V. randyjonesi sp. n., V. robertwellsi sp. n., V. danmartini sp. n., V. hallwachsorum sp. n.
CLASSIFICATION OF NORMAL AND KNEE JOINT DISORDER VIBROARTHROGRAPHIC SIGNALS USING MULTIFRACTALS AND SUPPORT VECTOR MACHINES
Authors: Jac Fredo Agastinose Ronickom , Josena Thomas Raj , Palaniappan Rajkumar , Mythili Asaithambi
Published: July 2017

The development of reliable Computer Aided Diagnosis (CAD) systems would help in the early detection of Knee Joint Disorder (KJD). In this work, normal and KJD vibroarthrographic (VAG) signals are classified using multifractals and Support Vector Machines (SVM). Multifractal dimension [Formula: see text] is calculated from the VAG signals for various [Formula: see text]-values ([Formula: see text]). Geometrical features are calculated from the multifractal spectrum. The dimension of the feature set is reduced using Principal Component Analysis (PCA). The significant features obtained from the multifractal spectrum are fed as the input to the SVM classifier. The accuracy of the classifier is analyzed using kernels such as linear, quadratic, polynomial and Radial Basis Functions (RBF). The results suggest that VAG signals exhibits the multifractal property. The fluctuations in the normal and abnormal signals are well predicted in small scales of segments of time series. The features such as [Formula: see text] and Mean[Formula: see text] are high in abnormal VAG signals. These features give statistically significant values in differentiating the normal and abnormal subjects ([Formula: see text]). The area under the Receiver Operating Characteristic (ROC) curve is high for polynomial function (0.98). The SVM classifier with polynomial function gives 92.13% of accuracy in differentiating the normal and abnormal subjects. The calculation of multifractal spectrum and geometrical features from VAG signals requires optimization of few parameters, easy to compute, computationally inexpensive, and less time consuming. Hence, the CAD system seems to be clinically significant for the classification of normal and KJD subjects.
Research of Tool Durability in Surface Plastic Deformation by Wide Burnishing of Cast Iron without Metalworking Fluids
Authors: Grigoriev Sergey N. , Bobrovskij N.M. , Melnikov P.A. , Bobrovskij I.N. , Zaborowski Tadeusz
Published: July 2017

The hyper productive surface plastic deformation processing technology called as wide burnishing (WB) was developed in Russian Federation. The mechanics of new WB technology is different from the classic SPD technologies (rolling or burnishing). For example applied force during processing of burnishing is 150-300 N, of WB is 2500-5000 N due to condition of process implementation in mass production with limited processing time (3-4 turnovers of workpiece). WB also has a high degree of deformation due to a multiple deformation passes. The purpose of the study was to determine the durability of a burnishing tool with the working surface made of the hard alloy with different dispersion. During the durability tests were tested VK6 alloy with the chemical composition of WC-94%, Co-6%, grain size of 2.1...3.4 micron (hardness HRA 88.5) and similar in chemical composition fine-grained hard alloy H10F (WC-90%, Co-10%) produced by Sandvik-MKTS with grain size of 0.5...0.9 micron (hardness HRA 92.1). Processing was conducted without lubricoolants. The acquired data presents that the roughness exceeds the tolerance during the processing by tool made of H10F alloy later than by tool made of VK6 alloy. At the same time increase of durability is from 60% to 80%.
Experimental Study of the Method for Resistance Heat Treatment of Tubes for Steam Generator
Authors: Shimov Georgy , Serebryakov Andrey V. , Serebryakov Alexander
Published: July 2017

The main reason for appearance and development of corrosion damage of the nuclear power plant (NPP) steam generator heat exchanger pipes is the process of stress corrosion cracking of metal under the influence of the residual tensile stresses. The method for heat treatment and straightening of the heat exchanger pipes using distension is proposed. The approbation of the process in a production environment is carried out. The construction and operation of the experimental installation are described. The experimental results show that the proposed method provides mechanical properties, grain size and resistance to intergranular corrosion of metal pipes in accordance with the requirements of Standard Specification 14-3P-197-2001 (Seamless pipe of corrosion-resistant steels with improved surface condition). In pipes, heat-treated by the proposed method, the level of residual tensile stresses and the curvature are one order less than in the tubes, heat treated by the technology which is usually used.
Properties of Powders from Stainless and Heat Resistant Alloys Produced by Gas Dynamic Spray for Manufacturing Parts of Complex Shape
Authors: Oglezneva Svetlana , Khanov Almaz
Published: July 2017

The objects of the study were powders of stainless steel and superalloy obtained gas-dynamic spray in the VIGA 2B (ALD, Germany). It have been investigated the microstructure, structural and phase composition, grain size, physical, chemical and technological properties of powders of alloys obtained by gas-dynamic spray melts.To study the structure and properties of powders of different factions were the used electron microscopy techniques, metallographic, sedimentation, X-ray, energy dispersive analysis, imaging, chemical, and other analytical methods. The powders have a spherical shape, low impurity content, good fluidity and can be used for producing parts by selective laser sintering, slip casting, injection molding, coating plasma and the sintering.
Thermal Treatment of Aviation Aluminum Alloys in Strip Processing Lines
Authors: Sasse Caesar , Brühl Fritz , Schäfer Michael
Published: July 2017

For many years now the use of aluminum as a light weight construction material in the aviation and automotive industry is on the rise. Without the innovative aluminum materials the strategies of constructing in light-weight design cannot be implemented. Last but not least this trend is driven by official requirements directing the reduction of greenhouse gas emissions. Aluminum is used both for structural components as well as for external body parts. Aluminum products for these industries have to undergo a production process which includes homogenizing of the ingots, hot rolling and cold rolling. Subsequent to the cold rolling process, the aluminum sheets have to undergo a heat treatment process to regain formability as well as the required material strength. The material properties required by the aviation and automotive industry are achieved in the annealing furnace and downstream cooling equipment. Equal and well-aimed heating and cooling along the length and across the width provide the strips with the metallurgical properties with regard to hardness and grain size. Hence the annealing furnace and the downstream cooling equipment are the decisive process components and critical for the high quality of the end material. First the material is heated up to a temperature above 500 °C for the solution heat treatment process. The following process step foresees cooling down the material to ambient temperature. Especially 6xxx automotive-alloys as well as 2xxx and 7xxx aerospace-alloys require high cooling rates. Eventually, the material gets heated up again for a certain time to apply an artificial aging process. In floatation heat treatment furnaces the strip is guided sinusoidal and contactless by floatation nozzles through the furnace. The strip is heated up and kept at the required strip temperatures in time, so the aluminum-alloy obtains their structure. The cooling process with high cooling rates is executed as a combination of water and air cooling. A mathematical model calculates the necessary settings for the annealing and cooling process under consideration of the mechanical properties. Paper and presentation will introduce the furnace technology for aluminum strips. Especially, the heat treatment facilities for heat and chemical treatment lines will be presented. It will especially emphasize on heat treatment cycles, the materials and the applications.
Synthesis of Cast Composite Materials by SHS Metallurgy Methods
Authors: Yukhvid V.I. , Andreev D.E. , Sanin Vladimir N. , Gorshkov Vladimir A. , Alymov M.I.
Published: July 2017

The review of the results obtained by the authors in synthesis of cast composite materials by the methods of SHS metallurgy is made. The main attention is paid to synthesis of heat-resistant materials based on intermetallic compounds of nickel and titanium and niobium silicides as well as tungsten-free hard alloys based on titanium and chromium carbides. The parameters allowing one to govern the process, material structure and composition were determined. Practical application was specified.
Changing of Mechanical and Technological Properties of Cast Metal as a Result of Pulse-Magnetic Processing of Melts
Authors: Chernikov Dmitrij , Glushchenkov Vladimir
Published: July 2017

A new method of action on melts is proposed which is based on pulse-magnetic processing them with the aim to form a homogeneous fine-grained structure and improved technological properties of cast metal. The results of experimental researches of influence of main factors of treatment on the structure and properties of binary and commercial alloys of the system Al-Si are given.
New Technology of Combined Machining of Aluminium Alloys
Authors: Dovzhenko Nikolay , Sidelnikov Sergey , Dovzhenko Ivan , Galiev Roman
Published: July 2017

Basic information and research results of the process combined rolling-extruding have been represented, which have been used to create new energy-saving technologies for obtaining of long deformed semi-finished products of small cross-section. It has been shown that such combined processing technologies may be applicable for the machining of low ductility and low-tech aluminium alloys with high metal yield and high productivity.
Revised Penetration Method Based on Evaluate High Temperature Property of SBS Modified Asphalt
Authors: Han Sen , Sun Pei , Liu Ya Min , Li Wei
Published: July 2017

In order to achieve the penetration method which could reflect the high temperature property of SBS modified asphalt, the paper presented the penetration test of SBS modified asphalt with different types and dosages of SBS modifier at three kinds of penetration weight and four different temperatures. Meanwhile, the high temperature performance of the SBS modified asphalt mixture was studied. It was found that penetration measured under current specification method (25oC, 100g, 5s) could not identify the difference of viscosity and high temperature property of different SBS modified asphalt. When the test conditions are revised to “penetration weight of 150 g, test temperature of 30oC, penetration time of 5s”, the penetration of different SBS modified asphalt measured by revised method could be used to evaluate the temperature susceptibility of SBS modified asphalt accurately and are closely related to the dynamic stability of mixture.
The Impact of Electrochemical Chloride Extraction on Reinforced Bond
Authors: Zhang Kun , Shan Wei , Sun Wen Bo
Published: July 2017

This paper examines the impact of type of electrolyte solutions, standing time without electricity on the reinforced bond of the concrete of different water cement ratio before and after chloride extraction, processes the microscopic structure and mechanism analysis. The electrochemistry method can discharge the chlorine salt without destroying the original concrete protective layer and realize the non-loss, low cost and fast repair for the concrete structure destroyed by the chlorine salt corrosion. The results show a substantial loss of the reinforced bond (70-76%) after chloride extraction according to the concrete of different water cement ratio, and the decrease is in proportion to the current-on time and the electrochemical capacity of the electrolyte. The increased partial porosity of the cathode area of the concrete by the chlorine and hydrogen produced in the process of electrochemical chlorine extraction, the decomposition and softening of the concrete hydration products with external field are the main reasons for the dramatic drop of the reinforce bond.
The Study of Oil Palm Shell (OPS) Lightweight Concrete Using Superplasticizer, Silica Fume, and Fly Ash
Authors: Tjahjono Elly , Fani Ayudia M. , Dodi Dodorus D. , Purnamasari Erinda P. , Silaban Feny A. , Arijoeni Essy
Published: July 2017

The concrete technology has been growing significantly since years ago especially in Indonesia’s construction. Therefore, Indonesia needs new innovation of concrete technology to solve the problem for the availability of concrete material. Indonesia is known as the largest producer of crude palm oil (CPO) in the world. Oil palm shell (OPS) is one of the solid wastes produced in crude palm oil industry that can be used as concrete materials. This paper presents the experimental results of a research project to produce structural lightweight concrete using oil palm shell (OPS), as a coarse aggregate. This experimental was investigating the effects of adding silica fume, fly ash, and superplasticizer for the compressive strength and flexural strength of the OPS lightweight concrete. It was found that OPS lightweight concrete has compressive strength up to 23.90 MPa in 28-days and flexural strength up to 2.54 MPa in 28-days. This experimental concluded that OPS lightweight concrete has a good potential as a lightweight coarse aggregate and low-cost housing construction in Indonesia.
Socioeconomic Status and Self-Reported Chronic Diseases among Argentina's Adult Population: Results Based on Multivariate Probability Models
Authors: Viego Valentina , Temporelli Karina
Published: July 2017

Background

Hypertension, diabetes and hypercholesterolemia are the most frequent and diagnosed chronic diseases in Argentina. They contribute largely to the burden of chronic disease and they are strongly influenced by a small number of risk factors. These risk factors are all modifiable at the population and individual level and offer major prospects for their prevention. We are interested in socioeconomic determinants of prevalence of those 3 specific diseases.

Design and methods

We estimate 3-equation probit model, combined with 3 separate probit estimations and a probit-based Heckman correction considering possible sample selection bias. Estimations were carried out using secondary self-reported data coming from the 2013 Risk Factor National Survey.

Results

We find a negative association between socioeconomic status and prevalence of hypertension, cholesterolemia and diabetes; main increases concentrate in the transition from low to high SES in hypertension and diabetes. In cholesterol, the major effect takes place when individual crosses from low to middle SES and then vanishes. Anyway, in Argentina SES exhibit and independent effect on chronic diseases apart from those based on habits and body weight.

Conclusions

Public strategies to prevent chronic diseases must be specially targeted at women, poorest households and the least educated individuals in order to achieve efficacy. Also, as the probability of having a condition related to excessive blood pressure, high levels of cholesterol or glucose in the blood do not increase proportionally with age, so public campaigns promoting healthy diets, physical activity and medical checkups should be focused on young individuals to facilitate prophylaxis.
Temperate-Water Immersion as a Treatment for Hyperthermic Humans Wearing American Football Uniforms
Authors: Miller Kevin C. , Truxton Tyler , Long Blaine
Published: July 2017

Context: 

Cold-water immersion (CWI; 10°C) can effectively reduce body core temperature even if a hyperthermic human is wearing a full American football uniform (PADS) during treatment. Temperate-water immersion (TWI; 21°C) may be an effective alternative to CWI if resources for the latter (eg, ice) are unavailable.

Objective: 

To measure rectal temperature (Trec) cooling rates, thermal sensation, and Environmental Symptoms Questionnaire (ESQ) scores of participants wearing PADS or shorts, undergarments, and socks (NOpads) before, during, and after TWI.

Design: 

Crossover study.

Setting: 

Laboratory.

Patients or Other Participants: 

Thirteen physically active, unacclimatized men (age = 22 ± 2 years, height = 182.3 ± 5.2 cm, mass = 82.5 ± 13.4 kg, body fat = 10% ± 4%, body surface area = 2.04 ± 0.16 m2).

Intervention(s): 

Participants exercised in the heat (40°C, 50% relative humidity) on 2 days while wearing PADS until Trec reached 39.5°C. Participants then underwent TWI while wearing either NOpads or PADS until Trec reached 38°C. Thermal sensation and ESQ responses were collected at various times before and after exercise.

Main Outcome Measure(s): 

Temperate-water immersion duration (minutes), Trec cooling rates (°C/min), thermal sensation, and ESQ scores.

Results: 

Participants had similar exercise times (NOpads = 38.1 ± 8.1 minutes, PADS = 38.1 ± 8.5 minutes), hypohydration levels (NOpads = 1.1% ± 0.2%, PADS = 1.2% ± 0.2%), and thermal sensation ratings (NOpads = 7.1 ± 0.4, PADS = 7.3 ± 0.4) before TWI. Rectal temperature cooling rates were similar between conditions (NOpads = 0.12°C/min ± 0.05°C/min, PADS = 0.13°C/min ± 0.05°C/min; t12 = 0.82, P = .79). Thermal sensation and ESQ scores were unremarkable between conditions over time.

Conclusions: 

Temperate-water immersion produced acceptable (ie, >0.08°C/min), though not ideal, cooling rates regardless of whether PADS or NOpads were worn. If a football uniform is difficult to remove or the patient is noncompliant, clinicians should begin water-immersion treatment with the athlete fully equipped. Clinicians should strive to use CWI to treat severe hyperthermia, but when CWI is not feasible, TWI should be the next treatment option because its cooling rate was higher than the rates of other common modalities (eg, ice packs, fanning).
The long and short of cataclysmic variables: A multi-wavelength follow-up study
Authors: Szegedi Hélène , Odendaal Alida , Meintjes Pieter J.
Published: July 2017

No abstract available.
“Targeted diabetes education” and glycemic control during ramadan fasting: An exploratory study
Authors: Mustafa Huda , Hashim Tarek , Beshyah Salem , Amin Ruqaya , Eissa Raja , Tommy Mary , Al Fayyadi Salouha , Nizar Batoul
Published: July 2017

Background: Management of diabetes during Ramadan fasting may be taken as a classical example of culturallysensitive care in some parts of the world. Several medical problems face diabetic patients who choose to fast. Objectives: To evaluate the effect of a locally-designed “targeted diabetes education” initiative on glycemic control of patients who intended to fast during Ramadan. Patients and Methods: This is a prospective cohort, controlled, non-randomized study. Seventy-one patients were recruited (46 women, 25 men); 10 had type 1 diabetes and 61 had type 2 diabetes. Of these, 51 patients were allocated to the intervention group, 13 were controls; 7 dropped out of the study. The “Targeted Diabetes Education” program included 2-3 educational visits to diabetes educators and 2-3 dietary counseling sessions before, during, and after Ramadan, in addition to telephone counseling and support. Home glucose monitoring was recommended to be performed in both the preprandial and 2 hour post prandial states at least 3-6 times per week plus recording of all hypoglycemic events. There was no deliberate intensification of medication for any patient. Outcome Measures: Risk stratification of patients was conducted according to the 2005 American Diabetes Association (ADA) guidelines. Preprandial and postprandial blood glucose levels, serum fructosamine, and hypoglycaemic episodes were measured during and after Ramadan. HbA1c, body weight changes and lipid profiles were also measured before and after Ramadan fasting. Results: More than 60% of the diabetic patients who fasted during Ramadan were in the higher risk groups (very high risk category 33.8%, high risk category 29.6%). Mean fasting blood glucose was reduced by 57 mg/ dL (95% CI, 21 - 94; p=0.005) in the intervention group. Mean HbA1c was lower in the intervention group by 1.5% (95% CI, 0.5 - 2.6; p=0.007) compared with the controls. Although serum fructosamine was reduced by 0.1 mmol/L (95% CI, -0.9 - 0.8; p=0.84) in the intervention group, this was not statistically significant. Mean difference in total cholesterol was 9.6 mg/dL (95% CI, -37.5 - 18.3; p=0.5) and in triglycerides 19.6 mg/dL (95% CI, -5 – 12; p=0.23) for the intervention group. Number of hypoglycemic events was significantly lower in the intervention group; 94% had no events compared to 73% in the control group. Mean difference in body weight was 0.4 kg (95% CI, -3.0 - 3.8: p=0.81). Conclusion: Targeted diabetes education is effective in achieving better glycemic control and reducing the risk of hypoglycemia in diabetic patients who fast during Ramadan. Therefore, more Muslim patients with diabetes who wish to fast during Ramadan can do this safely.