bluuebunny/crossref_metadata_2025 huggingface dataset:
Tipología de invasiones urbanas. Una propuesta a partir del caso de Cali, Colombia.
Authors: Suavita Bejarano Myriam
Published: July 2017

Este artículo se desprende de la Tesis de Doctorado titulada “Producción social del espacio en invasiones. Estudio de caso Cali, Colombia”. Para determinar las variables y los diferentes momentos en la producción social del espacio se hace necesario primero, comprender y recrear el proceso de construcción de las invasiones, su morfología y estructura urbana, las formas particulares de apropiación del suelo y los niveles de consolidación urbana, todos insumos fundamentales para establecer la tipología propuesta. En la ciudad, el país y la misma Latinoamérica, trabajos de este tipo son prácticamente inexistentes. La investigación recoge, caracteriza y ordena, la mayoría de casos referenciados en la literatura especializada, en periódicos o revistas, así como los identificados en campo; unas 251 invasiones presentes en Cali desde comienzos del siglo pasado hasta el presente, organizadas en ocho clases distintas.Palabras claves: Tipología, invasión, ocupación.
Palabras de Elkin Salcedo Hurtado.
Authors: Salcedo Hurtado Elkin De Jesús
Published: July 2017

Estamos aquí reunidos para dar inicio a la programación de múltiples eventos, con los cuales durante esta semana, por un lado, conmemoramos los 10 años de existencia y vida académica del Departamento de Geográfica y de sus diversos programas desarrollados; y por el otro, otorgar un grato y merecido reconocimiento al Profesor Luis Segundo Valdivia, por todos los esfuerzos realizado para la creación de esta Unidad Académica, que e inicio con la expedición de la Resolución No. 135 de Diciembre de 1992, por el Consejo Superior de la Universidad del Valle.
Proyecto Educativo Institucional.
Authors: Araujo Olga
Published: July 2017

Cuando inicialmente emprendimos nuestro estudio sobre el P.E.I. tomando la asignatura correspondiente al pregrado de nuestro plan de estudios conocíamos muy poco sobre los objetivos y reglamentos del P.E.I., decretado en el articulo 73 ley 115 de 1994 (Ley general de la educación) establecido por el Ministerio de Educación Nacional.El Proyecto Educativo Institucional es un documento en el que todos los establecimientos educativos públicos y privados deben especificar una propuesta de formación.
Cambio de mentalidad y de hábitos culturales respecto al manejo de los residuos sólidos en la ciudad de Santiago de Cali.
Authors: Valenzuela Ortiz Nora Graciela
Published: July 2017

La universidad es un espacio académico que nos permite crecer en muchas facetas de nuestro ser para transformarnos en individuos que sirven a una comunidad, pero también es un proceso en el que encuentras espacio para percibir tu existencia en el mundo a partir de un lugar diferente, un lugar solidario en el que puedes sentir que tu eres parte del mundo y el mundo hace parte de ti, un lugar donde la reflexión te permite hacer y crecer por la existencia humana y en este sentido por la propia, un lugar donde el estudiante universitario alcanza a percibir la gran importancia de hacer en la sociedad desde el mismo instante en que sus deseos se lo permitan.
Actividades de la Comunidad Geográfica.
Authors: Vásquez Sánchez Jaime
Published: July 2017

El Programa de Estudio de Posgrado en Geografía – EPG – cumple 20 añosHace 20 años, por iniciativa de la Universidad Pedagógica y Tecnológica de Colombia UPTC y del Instituto Geográfico Agustín Codazzi IGAC, se cristalizo la idea de crear una institución que atendiera las necesidades de formación posgradual en Geografía en el país. Ambas entidades firmaron un convenio de cooperación interinstitucional que dio vida al Programa académico conocido con EPG. EPG. Este en la actualidad, ofrece instrucción avanzada en geográfica, en la identificación, confrontación y entendimiento de problemas relevantes de investigación territorial, y en la búsqueda de alternativas de solución a problemas socioespaciales que aquejan a Colombia.
La apreciación de los peligros de desastres en Cuba:tarea de toda la sociedad.
Authors: Laguna Cruz Jorge Alejandro , Sánchez Arencibia Alba
Published: July 2017

En este artículo se expone, desde una perspectiva educativa, el proceso de preparación de la sociedad cubana para realizar una sistemática evaluación y apreciación de los peligros de desastres y así reducir significativamente la vulnerabilidad de las personas, comunidades y la sociedad en su conjunto. Los autores dedican atención al perfeccionamiento del trabajo educativo desde las más tempranas edades para la prevención de desastres, resaltando el protagonismo de la escuela como institución fundamental de la comunidad. A los fenómenos naturales, especialmente los ciclones tropicales, se reserva un espacio por su frecuencia en el área geográfica donde se encuentra Cuba y sus implicaciones al organizar el proceso para la reducción de sus efectos con ejemplos tomados de la experiencia dejada al paso del huracán Dennis que azoto a la isla en los primeros días de julio de 2005 con daños de consideración pero con un mínimo de pérdidas de vidas humanas.
Elementos para una delimitación del concepto de mentalidad espacial en Geografí­a.
Authors: Abella Millan Pacífico
Published: July 2017

En este articulo se propone, desde una óptica transdisciplinaria, fundamentar el concepto de la mentalidad espacial en la geografía, como herramienta analítica para el estudio de formaciones espaciales que se caracterizan por su larga duración. Para ello, se realiza una revisión sucinta de los autores de distintas disciplinas y de la geografía, en especial, discutiendo las tesis del determinismo económico en la producción del espacio geográfico y la influencia de los productos mentales, compartido colectivamente en dicha producción.
Consideraciones socioambientales del Valle del Cauca.
Authors: Perafán Cabrera Aceneth
Published: July 2017

Este artículo tiene como propósito principal hacer un análisis de la realidad socioambiental del departamento del Valle del Cauca, identificando los factores más significativos que han incidido en la mayor parte de transformaciones territoriales, sociales, ambientales y económicas ocurridas en cada una de sus zonas fisiográficas.A través de se estudio, se vivencia cómo la biodiversidad sobre la cual se sustenta el desarrollo de cada una de las zonas fisiográficas vallecaucanas ha sufrido serios impactos que ha sido generados por la acción antrópica. Así mismo, se aprecia cómo se ha producido una significativa pérdida del patrimonio natural y se han agudizado problemas tan graves como el empobrecimiento de recursos vitales como flora, fauna, suelo y agua. Por otra parte, se refleja claramente la ausencia de un aprovechamiento social que involucre a toda la comunidad vallecaucana, siendo unos pocos privilegiados los que verdaderamente resultan beneficiados de toda la riqueza natural que este territorio posee.Palabras clave: Valle del Cauca, deterioro ecológico, deforestación, contaminación.
CARACTERIZACIÓN DE ISLAS FRESCAS URBANAS -IFU- EN LA CIUDAD DE SANTIAGO DE CALI, COLOMBIA
Authors: Fernández Córdoba Jhonattan , García Millán Nathalie
Published: July 2017

Resaltar la importancia de incluir, dentro de los procesos de planificación urbana, una nueva percepción de ciudad que involucre dentro de su funcionalidad los beneficios que brindan elementos del medio biofísico como la vegetación, es de gran importancia para poder aspirar a una sustentabilidad urbana. Por lo tanto, la presente investigación tiene como objetivo llevar a cabo una caracterización de lo que aquí se define como Islas Frescas Urbanas –IFU-en la ciudad de Santiago de Cali a partir de las zonas con presencia de vegetación y su relación con la temperatura, teniendo en cuenta la percepción y valoración por parte de la comunidad sobre estos espacios y su distribución espacial en el territorio. La teledetección representa una herramienta importante para el desarrollo metodológico de la investigación; en este sentido, la obtención y correlación de indicadores de vegetación como el NDVI y el NDWI e indicadores como el de Temperatura de la Superficie Terrestre (LST) y de área construida (NDBI), con ayuda de imágenes satelitales LANDSAT 5 TM de los años 1999 y 2011, permitieron la identificación de zonas concebidas como IFU en la ciudad de Cali para tales fechas. También se introducen, a través de herramientas como la encuesta y la observación, técnicas de investigación de tipo cualitativo, con las que se logró conocer la percepción y valoración sobre la relación vegetación-temperatura en determinadas zonas de la ciudad.
Crisis del periodismo informativo: retorno a la comunicación
Authors: González Julián
Published: July 2017

Este ensayo sugiere que algunas transformaciones apreciables en el campo de las prácticas periodísticas tienen relación con una historia más profunda de las formas instituidas de comunicación pública. Y examina en qué sentido una diversidad de prácticas informativas, en principio,muy distintas entre si, expresarían la crisis y erosión del horizonte comunicacional en que se forjó el periodismo informativo y constituyen tentativas de retorno, recuperación o reorganización de modos de comunicación pública que la prensa más seria y el canon informativo habían rechazado duraderamente.
Rastros documentales
Authors: Arbeláez Ramiro
Published: July 2017

Este texto (aparecido originalmente en “Cuadernos de cine colombiano” 34) adelanta un análisis acerca de la naturaleza del documental, de los cambios que este género ha venido registrando a través de su historia, de los nuevos lenguajes que ha ido integrando. Para alcanzar ese nivel de análisis, el autor parte de reconstituir desde una perspectiva histórica la aparición y evolución del programa Rostros y Rastros de UVTV (la programadora de la Universidad del Valle),poniendo en relación metodológica este hecho con el surgimiento de Telepacífico, el canal regional del suroccidente colombiano. Aquí se muestra, de manera pormenorizada,el carácter y la naturaleza de Rostros y Rastros, quizás uno de los programas documentalistas de mayor importancia en la historia de la televisión colombiana.
Management of Out of Specification (OOS) for Finished Product
Authors: S N Ravi Kiran , M. P. Gowrav , V. Gangadharappa H. , Ravi G.
Published: July 2017

Background of the study: Difficult lies at the core of drug producer successful operation. Laboratory testing, which is
compulsory by the CGMP regulations are required to check that components, containers and closures, in-process materials,
and finished products conform to specifications, including stability specifications. Objective of the study: The objective of
the investigation procedure should clearly state when the investigation is required, and define OOS, OOT, and aberrant
results. OOS results are most often generated due to laboratory or manufacturing-related errors, the setting of inappropriate
specifications, or poor method development. Materials and Methods: The current work is an effort to deliberate several
aspects of finding the root cause for the OOS during the finished product analysis by using HPLC. Results and Discussion:
Product’s individual unknown impurity was not in specification limit and, hence study carried out to find the root cause.
Conclusion: After conducting detail investigation it was proved that an analyst conducted the analysis of the product after
the due date to expiry.
PENILAIAN KAPASITAS TERMINAL PETI KEMAS PELABUHAN TELUK BAYUR
Authors: Putri Ratna Effiliani , Hadiguna Rika Ampuh
Published: July 2017

The objective of this paper is to examine the utilization and performance of port management so that it shows the level of operational effectiveness and efficiency of various port facilities. The assessment was conducted using the static and  the dynamic capacity method, as well as the theoritical and the actual capacity. Overall, the findings show that the average utilization of container terminal facility in Teluk Bayur Port is still very low.
EVALUASI MANAJEMEN SISTEM INFORMASI DAN TEKNOLOGI INFORMASI PELABUHAN
Authors: Sitorus Budi , Sitorus Tulus Irpan Harsono , Ricardianto Prasadja
Published: July 2017

The purpose of the research is to identify the problem in the port management information system, analyze what needs to be managed in the port management information systems, provide recommendations on the management of information systems management. The research method uses a qualitative analysis approach, in which the port management is still unsatisfactory, therefore, to manage port services requires technology application-based management information system the one that is currently being developed is Inaportnet, in the early stages of this technology application used for the port is already cultivated. The expected result is that the application of information technology-based systems are expected to increase the harbor management performance and the government is expected to direct, supervise and enforce the stakeholders in the port who violate the rules.
SUMBER DAYA MANUSIA TRANSPORTASI, TELEKOMUNIKASI, DAN PARIWISATA DALAM PERSPEKTIF GLOBAL
Authors: Purwanto Budi , Rafi Salahudin , Pongoh Hentje
Published: July 2017

The purpose of this study is to assess the human resources sectors of transport, telecom­munications and tourism in a global perspective. This study is a literature study with descriptive analysis method to describe the existing problems and provide recommenda­tions to anticipate the world’s rapidly growing trend. The results show that the increasing mastery of foreign languages and technology has become an absolute requirement that Indonesian human resources can compete on a global level. However, the state, business, and society must work together in forming a mental attitude, promote an understanding of the religion, and raise the nation ideology since early stage so that it can minimize the negative impacts of globalization.
KUALITAS PELAYANAN COMMUTER LINE
Authors: Saidah Deslida
Published: July 2017

The Increasing in number of passengers is influenced by schedule, price, and improved infrastructure and facilities. The study aims to identify the effect of new schedule and price on service quality. The study used non probability sampling method to acquire data from passengers. Regression was used to analyze the data collected. Hypothesis test show coesfficient of schedule towards service quality is 0.568 while tariff affects service quality with a coefficient of 0.535. The study suggests improvement on scheduling and tariff.
CUSTOMER RELATIONSHIP MANAGEMENT DAN PERFORMANSI PELABUHAN
Authors: Triyani Devi , Lasse David Aroschi , Widodo Widodo , Hasan Husni
Published: July 2017

The research objective is to determine the impact of relationship management with land transportation service providers to the performance of the port with a mediation service that adds value to the PT. Indonesia Vehicle Terminal (IKT), Tanjung Priok, Jakarta. The study uses a quantitative approach to associative and the data processed by the program LISREL 8.8. The sample was 100 of service users with quota sampling technique. Data analysis was conducted using descriptive and inferential statistical path analysis. The results show: relationship management with providers of land transportation services have a direct positive impact and significant to the performance of the port, services that provide added value affect prositive direct impact and significant to the performance of the port, the relationship management with providers of land transportation services have a positive direct impact and significant to the service that provides value added, and the relationship management with providers of land transportation services have positive indirect impact and significant to the performance of the port with a mediation service that adds value. The conclusion is relationship management with providers of land transportation services has an impact on the performance of the port with a mediation service that adds value, therefore performance can be improved through the port relationship management with providers of land transportation services and services that provide added value.
El estudio de los bosques reales de Portugal a través de la legislación forestal en las dinastías Avis, Habsburgo y Braganza (ca. 1435-1650)
Authors: Trápaga Monchet Koldo
Published: July 2017

Este artículo pretende estudiar la legislación forestal emanada de Portugal entre los siglos XV y XVII para la conservación y protección de los bosques reales durante tres dinastías: los Avis, Habsburgo y Braganza. Así mismo, explora el establecimiento y la evolución de la organización administrativa desarrollada para la conservación de las áreas forestales y la evolución de los aprovechamientos forestales. Ello se ha realizado teniendo en consideración la evolución de las estructuras político-institucionales del reino de Portugal, la expansión marítima y los contextos internos e internacional.
La Visitación de Saint-Jacques de Amberes: ¿Victor Wolfvoet o Simon de Vos?
Authors: Díaz Padrón Matías
Published: July 2017

El artículo trata de esclarecer la autoría propuesta y asumida a Victor Wolfvoet, desde finales del siglo XVII hasta hoy, de La Visitación de la iglesia de Saint-Jacques de Amberes restituyéndola a Simon de Vos. Al relato literario acompaña el documental y el análisis estilístico y técnico de la pintura, con obras análogas de este maestro como prueba comparativa a la atribución hoy propuesta.
Huir del amor: Emblemática y paisaje en una nueva pintura de Otto van Veen
Authors: Sanzsalazar Jahel
Published: July 2017

En el anonimato durante siglos y de gran tamaño, la pintura objeto de este estudio se restituye a Otto van Veen. Por su composición, modelos y estilo se vincula con su obra conocida, y se compara, entre otras obras, con Hércules y la Hidra del museo de Budapest y con el Cristo muerto de la iglesia de Sint-Waudru de Mons, Bélgica. El asunto se asocia con la emblemática a la que Van Veen se dedicó activamente. Los versos de las Elegías de Propercio en el margen inferior del lienzo reflejan el profundo conocimiento de la literatura clásica resultante de la formación humanista del pintor, al tiempo que advierten contra la inutilidad de huir del amor. Un mensaje moral asido en los principios del Neoestoicismo fundado por su gran amigo Justus Lipsius. A propósito de la ejecución del paisaje, se excluye la posibilidad de la intervención de otra mano, dadas su inclinación al género y la ausencia de evidencias documentales de tal tipo de colaboración. El hallazgo de esta pintura viene a sumarse a la relativamente limitada producción que del maestro se conoce en España hasta la fecha.
Prevalence of Dental Caries among Primary School Children of Kathmandu District- A Pilot Study
Authors: Khanal Sunita , Bhattarai Rosina , Rao G Nagaraja , Shrestha Sujita
Published: July 2017

Background & Objectives: Worldwide, 60 to 90% of school children have experienced dental caries with higher prevalence in Asian and Latin American countries and poor dental and oral health and untreated oral disease can have a significant impact on quality of life according to WHO report. The objectives of the study were to assess the prevalence of dental caries both in deciduous and permanent teeth and to compare total decayed, filled teeth surfaces among primary school children of Kathmandu from both government and private schools and to find the percentage of first permanent molars affected with dental caries.Materials & Methods: A cross sectional study was conducted among two Government and two Private Primary School Children in Kathmandu district. Total sample were 468 children. Required permission were obtained from concerned authorities. WHO accepted indices for assessing caries designed by Henry T Klein, Carrole E Palmer and Knutson J.W was used. SPSS 20 version software was used for data analysis. Results: Among 468 primary school children examined, 224 were from Government and 244 were from Private school. The prevalence of dental caries was 62 % and more deciduous teeth were decayed. The decayed, filled teeth surfaces in Private and Government school was statistically significant (p=0.000) but gender wise prevalence was statistically insignificant (p=0.303). Among 1st Permanent Molars teeth examined 85% were decayed.Conclusion: This pilot study shows prevalence of dental caries more in deciduous teeth. Among the permanent teeth affected, first permanent molars are in high number.
Evaluation of the effect of gabapentin on postoperative analgesia with epidural morphine after abdominal hysterectomy
Authors: Aryal Diptesh , Gurung Renu , Marhatta Moda Nath
Published: July 2017

Background & Objectives: Gabapentin has been used successfully as a non-opioid analgesic adjuvant for postoperative pain management. We hypothesized that the preoperative use of gabapentin prolonged the analgesic effect of epidural morphine without an increase in adverse effects of morphine. Materials & Methods: In a randomized, double blind study sixty ASA PS I and II patients undergoing abdominal hysterectomy were assigned to receive either placebo or gabapentin 1200mg 1 hour before surgery. Postoperatively, 0.125% bupivacaine with morphine 50 µg per kg body weight was used for epidural analgesia. Vital parameters, time to the first request for analgesic, visual analogue scale scoring for pain at rest and during movement, 24-hour morphine consumption, and side effects were studied.Results: The patients were comparable with respect to age, weight, ASA PS, baseline hemodynamic parameters and duration of surgery. Gabapentin significantly decreased the duration of analgesia compared to placebo (1078.26 min Vs. 303.5 min; P value <0.0001). The VAS scores at rest and during movement at 1, 2, 4, 8, 12, and 24h were significantly lower in gabapentin group. The total amount of morphine consumption in 24 h postoperatively was significantly lower in gabapentin group (1.93mg Vs. 6.30mg; P value <0.0001). The incidence of nausea and pruritus was significantly lower with gabapentin. Conclusion: Oral gabapentin 1200 mg as a premedication decreases the dose requirement of epidural morphine and postoperative pain after total abdominal hysterectomy. It also decreases the pain scores at rest and during movement significantly.
Steppingstones to Imperial Unity? The British West Indies in the Late-Victorian Imperial Federation Movement
Authors: Price Peter
Published: July 2017

Formed in 1884, the Imperial Federation League sought to promote the idea of imperial unity, based on a vision of Britain and its colonies consolidating as a single polity. Consideration of the place of the British West Indies in a federation scheme served to highlight the divisions within the empire and the differences in understandings of imperial citizenship. Federationists were inconsistent about whether the West Indies should form part of the self-governing empire, based largely on different assumptions about race and the capacity for self-government. This failure to clearly define the nature of imperial community highlighted the tensions and inconsistencies of late-Victorian imperialism.
Czechoslovakia and Congo/Zaire under Mobutu, 1965–1980
Authors: Záhořík Jan
Published: July 2017

This study deals with the complicated relationship between the former Czechoslovakia and Congo/Zaire during the period of Mobutu Sese Seko's rule, 1965–1980. Czechoslovakia was very active in Africa during the cold war period and tended to develop economic and diplomatic relations with the majority of African countries. The countries were divided into several categories: priority countries, which were socialist or Marxist-oriented; countries of economic importance, and countries under the influence of former colonial capitalist powers. Despite being in the latter category, Congo/Zaire was of great importance due to its natural resources and economic potential. The Czechoslovak government sought to identify ways of strengthening its position there. Due to several administrative obstacles, direct economic exchange was impossible and all economic contacts had to be channelled via Belgium and Belgian companies. Nevertheless, in spite of such obstacles, both states tried to develop fruitful economic relations.
Development of a Modified Adhesion Test for Hot-Poured Asphalt Crack Sealants
Authors: Sawalha Mohammed , Ozer Hasan , Al-Qadi Imad L. , Xue Hengxiao
Published: July 2017

Crack sealing is a maintenance technique commonly used for cracks and joints to prevent moisture infiltration into pavements. Crack sealing materials should possess adequate adhesive and cohesive properties to remain intact in the cracks or joints, depending on the environment and pavement conditions in which they are installed. Adhesion failure is the most common failure mechanism and occurs mostly because of the poor adhesion capacity of sealants as well as the installation quality. Various standard laboratory tests are currently used to evaluate the adhesive properties of sealants to predict their field performance. These tests, however, either lack correlation with the field performance or have not yet been validated. This paper introduces the development of an adhesive prediction test: the modified crack sealant adhesion tester (modified CSAT). The modified CSAT is an improved version of the existing CSAT standard (AASHTO TP 89) and showed consistent results between specimens with sufficient repeatability. In addition, the modified CSAT was successful in capturing the effect of temperature changes and aging on the adhesion capacity of sealants. The adhesion test results were compared with the performance of the same sealants installed at different test sites. The correlation between the adhesion loads obtained in the laboratory was consistent with the sealant field performance.
Non-precious Metal Catalysts for Acetic Acid Reduction
Authors: Onyestyák György
Published: July 2017

Acetic acid (AA) hydroconversion was studied over various monometallic (Fe, Co, Ni, Cu, Zn, Pt) and bimetallic (doped with In as second, guest metal) catalysts loaded on a highly mesoporous, fumed silica support. The transformations were investigated in a fixed bed, flow-through reactor in temperature range of 240-380°C using hydrogen flow at 21bar total pressure. The catalyst precursors were activated in H2 flow at 21bar and 450°C as routine pre-treatment. Catalytic performances of the studied metal catalysts have nothing in common. Activities and the yields of main products contrast strikingly. Diversity of catalytic behaviour reflects the complexity of the surface reaction network. Contrary to the highly ethanol selective Co or Cu forms, over Ni catalyst mainly methane was produced. Indium doping can completely eliminate the hydrodecarbonylation activity and turn to the consecutive reduction route resulting in high ethanol yield. Metallic phases of different peculiarities can offer promising contacts for upgrading various oxygenates obtainable from biomass degradation.
Development of a nitrogen-doped 2D material for tribological applications in the boundary-lubrication regime
Authors: Chandrabhan Shende Rashmi , Jayan Velayudhanpillai , Parihar Somendra Singh , Ramaprabhu Sundara
Published: July 2017

The present paper describes a facile synthesis method for nitrogen-doped reduced graphene oxide (N-rGO) and the application of N-rGO as an effective additive for improving the tribological properties of base oil. N-rGO has been characterized by different characterization techniques such as X-ray diffraction, scanning electron microscopy, transmission electron microscopy, X-ray photoelectron spectroscopy and Raman spectroscopy. N-rGO-based nanolubricants are prepared and their tribological properties are studied using a four-ball tester. The nanolubricants show excellent stability over a period of six months and a significant decrease in coefficient of friction (25%) for small amounts of N-rGO (3 mg/L). The improvement in tribological properties can be attributed to the sliding mechanism of N-rGO accompanied by the high mechanical strength of graphene. Further, the nanolubricant is prepared at large scale (700 liter) and field trials are carried out at one NTPC thermal plant in India. The implementation of the nanolubricant in an induced draft (ID) fan results in the remarkable decrease in the power consumption.
Companies Credit Risk Assessment Methods for Investment Decision Making
Authors: Peškauskaitė Dovilė , Jurevičienė Daiva
Published: July 2017

As the banks have tightened lending requirements, companies look for alternative sources of external funding. One of such is bonds issue. Unfortunately, corporate bonds issue as a source of funding is rare in Lithuania. This occurs because companies face with a lack of information, investors fear to take on credit risk. Credit risk is defined as a borrower’s failure to meet its obligation. Investors, in order to avoid credit risk, have to assess the state of the companies. The goal of the article is to determine the most informative methods of credit risk assessment. The article summarizes corporate lending sources, analyzes corporate default causes and credit risk assessment methods. The study based on the SWOT analysis shows that investors before making an investment decision should evaluate both the business risk,using qualitative method CAMPARI, and the financial risk, using financial ratio analysis.
Vadybos funkcijų sv arba orlaivių techninės priežiūros kokybei
Authors: Tunčikienė Živilė , Grigas Vilius
Published: July 2017

Aviacija – viena saugiausių transporto rūšių, bet vis dėlto kasmet įvyksta skaudžių nelaimių. Šiame tyrime koncentruojamasi į vieną incidentų priežasčių – nepakankama ar netinkama atliktų orlaivių techninės priežiūros darbų kokybė. Tyrimo tikslas – susisteminti teorines prielaidas orlaivių techninės priežiūros paslaugų kokybei matuoti ir kartu kryptingai valdyti. Tikslo įgyvendinimo uždaviniai: atskleisti sisteminio požiūrio į tyrimo objektą esmę, išnagrinėti teorinį potencialą paslaugų kokybei valdyti, nustatyti orlaivių techninės priežiūros paslaugų kokybės valdymo specifikos metmenis. Paslaugų kokybės problematikai nagrinėti pasitelkti atlikto empirinio tyrimo rezultatai, rodantys vadybos funkcijų poveikį orlaivių techninės priežiūros darbų kokybei užtikrinti. Be to, nagrinėjamos vadybos teorijos, kurių pritaikymas praktikoje lemia didesnį darbo produktyvumą ir aukštesnę paslaugų kokybę.
Theoretical Analysis of The Use of Social Media in The Enterprise Activity
Authors: Donculaitė Monika , Vasilienė-Vasiliauskienė Virgilija
Published: July 2017

The purpose of the article is to present the results of analysis of scientific literature on the social media concept and social media classification and provide insights on how the use of the social media can be expanded in business to get the maximum benefits and minimize potential risks. The structure of the article fits for purpose – presents the analysis of the scientific literature, synthesis, comparison, systematization of information and its graphical visualization. The performed analysis allowed to determine possibilities for application of the social media in the enterprise activities and to identify gained benefits. Social media allows enterprises to communicate more flexible and faster both in the outside and inside environment, facilitates customer accessibility, provides opportunity to quickly respond to customer feedback or inform existing and potential customers about new ideas and proposals.
Testing the Recovery of Intrinsic Galaxy Sizes and Masses of z ∼ 2 Massive Galaxies Using Cosmological Simulations
Authors: Price Sedona H. , Kriek Mariska , Feldmann Robert , Quataert Eliot , Hopkins Philip F. , Faucher-Giguère Claude-André , Kereš Dušan , Barro Guillermo
Published: July 2017

Accurate measurements of galaxy masses and sizes are key to tracing galaxy evolution over time. Cosmological zoom-in simulations provide an ideal test bed for assessing the recovery of galaxy properties from observations. Here, we utilize galaxies with

at z ∼ 1.7–2 from the MassiveFIRE cosmological simulation suite, part of the Feedback in Realistic Environments (FIRE) project. Using mock multi-band images, we compare intrinsic galaxy masses and sizes to observational estimates. We find that observations accurately recover stellar masses, with a slight average underestimate of

and

scatter. Recovered half-light radii agree well with intrinsic half-mass radii when averaged over all viewing angles, with a systematic offset of

(with the half-light radii being larger) and a scatter of

. When using color gradients to account for mass-to-light variations, recovered half-mass radii also exceed the intrinsic half-mass radii by

. However, if not properly accounted for, aperture effects can bias size estimates by

. No differences are found between the mass and size offsets for star-forming and quiescent galaxies. Variations in viewing angle are responsible for ∼25% of the scatter in the recovered masses and sizes. Our results thus suggest that the intrinsic scatter in the mass–size relation may have previously been overestimated by ∼25%. Moreover, orientation-driven scatter causes the number density of very massive galaxies to be overestimated by

at

.
DEVELOPMENT OF A REAL-TIME SINGLE CHANNEL BRAIN–COMPUTER INTERFACE SYSTEM FOR DETECTION OF DROWSINESS
Authors: Pathak Malhar , Jayanthy A. K.
Published: July 2017

Drowsiness or fatigue condition refers to feeling abnormally sleepy at an inappropriate time, especially during day time. It reduces the level of concentration and slowdown the response time, which eventually increases the error rate while doing any day-to-day activity. It can be dangerous for some people who require higher concentration level while doing their work. Study shows that 25–30% of road accidents occur due to drowsy driving. There are number of methods available for the detection of drowsiness out of which most of the methods provide an indirect measurement of drowsiness whereas electroencephalography provides the most reliable and direct measurement of the level of consciousness of the subject. The aim of this paper is to design and develop a portable and low cost brain–computer interface system for detection of drowsiness. In this study, we are using three dry electrodes out of which two active electrodes are placed on the forehead whereas the reference electrode is placed on the earlobe to acquire electroencephalogram (EEG) signal. Previous research shows that, there is a measurable change in the amplitude of theta ([Formula: see text]) wave and alpha ([Formula: see text]) wave between the active state and the drowsy state and based on this fact theta ([Formula: see text]) wave and alpha ([Formula: see text]) wave are separated from the normal EEG signal. The signal processing unit is interfaced with the microcontroller unit which is programmed to analyze the drowsiness based on the change in the amplitude of theta ([Formula: see text]) wave. An alarm will be activated once drowsiness is detected. The experiment was conducted on 20 subjects and EEG data were recorded to develop our drowsiness detection system. Experimental results have proved that our system has achieved real-time drowsiness detection with an accuracy of approximately 85%.
Temperature Validation of 3D Model for the Reversing Hot Rolling in Connection with a Coil Model
Authors: Nam Alexander , Kawalla Rudolf , Zinoviev Alexander V. , Erisov Yaroslav A. , Prüfert Uwe , Eiermann Michael
Published: July 2017

The complex thermal modelling approach of the reversing hot strip rolling in connection with a coil model was developed. The coil model provides the modelling of the (un-) and coiling process. The modelling approach is based on object-orientated principals and implemented in MATLAB using library OOPDE and will be the base for the forecasting of the microstructure and the resulting material properties of strip during the reversing hot rolling. The model was validated using experimental data received after carrying out of the 2-pass reversing hot strip rolling of magnesium alloy AZ31. The results show a sufficient correspondence between experimental and calculated temperatures during the 1st and 2nd rolling pass.
Study and Build-Up of Deformation Zone at Cutting of Thin-Walled Tube by Torsion
Authors: Simagina S.G.
Published: July 2017

Intensive development of Russian aviation and aerospace industries put an emphasis to the problem of quality of using materials and workpieces and to the value of technical and economical indexes in the context of planned production level [1, 2]. Waste-free technologies are preferred. Cutting by torsion or cutting by shear are preferable technologies if thin-walled tube cutting is the main blanking operation. Build-up of workpiece deformation zone plays an important role in the cutting process. Deformation zone determines stability of details during further processing and exploitation. An extended research was conducted about tube separation process using torsion with an active counterpressure. Some parameters was defined in the result of research, in particular: distribution of deformation zone along length and thickness of workpiece, angular deflection and compression force and workpiece heating temperature impact on build-up of whisker disposition in the cut zone. It allows identifying optimum compression force range and temperature conditions. Compliance with recommended practices allows conducting thin-walled tube separation simultaneously with build-up on the workpieces whisker structure that is fortunate for further pressure treatment and exploitation.
Effect of Hot Rolling and Thermal Treatment on the Microstructure Evolution of Microalloyed Bainitic Steels for Pipeline
Authors: Kabanov Alexander , Korpala Grzegorz , Kawalla Rudolf , Ionov Sergey
Published: July 2017

Heavy plate for pipelines, which are used in earthquake-prone areas, must have among other a good ductility. The ductility is needed to prevent cracking in the case of local plastic deformation. The bainitic steels with retained austenite or martensite meet these requirements. The aim of this investigation is the determination of the thermo-mechanical treatment parameters with which such microstructures can be generated during the heavy plate production or an additional heat treatment. Experimental modelling of the production process for heavy plate was realized on a Gleeble HDS-V40 thermo-mechanical simulator. Moreover, the microstructure evolution processes during cooling on the round out table were investigated by dilatometry. The investigations on the formation of the microstructure during following accelerated cooling and heat treatment combination were carried out. All investigations were realized with two high-strength micro-alloyed steels, one of which was additionally alloyed with molybdenum. Results revealed that the decreasing of the temperature and duration of the heat treatment as well as addition of molybdenum reduce the size of grains and promotes the nucleation of the bainitic microstructure.
The Study of the Ageing Impact on Workability and Hardness of the Samples Made of Alloy VV751P (Ni-15Co-10Cr) after Selective Laser Sintering
Authors: Balaykin Andrey V. , Nosova Ekaterina A. , Galkina Natalia V.
Published: July 2017

Work is focused on study of workability changing of heat resistant nickel-based Ni-15Co-10Cr alloy produced by selective laser sintering from metal powder. Experimental research of HRC hardness changing was provided on plate samples 2х10х30 mm after sintering and typical heat treatment for this alloy. Heat treatment was: annealing at temperature of 1,000oС during 1.5 hours, and then at the temperature of 1,180oC for 2.5 h – 3 h. After that samples were treated in a furnace for 50 – 60 minutes at the temperature of 1,050oС. Then they were cooled-off to the temperature of 1,000oС during 50 – 60 minutes. After that they were further quenched at ambient temperature. After quenching the samples were subjected to ageing at the temperature of 850oC during 3, 6, 9, 12 and 15 hours. The bending and measurement of triangle height was proposed for work ability assessment of samples. Increased hardness was found with duration of ageing. Work ability grew up with duration of ageing but where was a gap of workability for 9 hours ageing. Calibration of sintered parts and samples are recommended to perform after quenching and ageing at 850oC no longer 6 hours.
Development of Technology of Nicrosil and Nisil Thermocouple Materials Using Extrusion of Metal Powders
Authors: Samboruk Anatoliy R. , Amosov Aleksandr P. , Kuznets Elena A. , Kuzina Antonina A. , Markov Yuri M.
Published: July 2017

Nicrosil-nisil (NiCrSi-NiSi) thermocouples (Type N) have a high thermal EMF stability, radiation resistance, resistance to oxidation of the thermocouple wires and can be used as a universal means of measuring temperatures up to 1300 °C. However, when the traditional metallurgical method is used for the production of rod and wire materials of nicrosil and nisil from ingots of metals, it is difficult to ensure the homogeneity of the ingots and materials of the thermocouple. It is known that powder metallurgy methods can provide a greater homogeneity of the material compared to casting technology. The aim of this work was to study the possibility of using powder technology for the fabrication of rods of nicrosil and nisil thermocouple materials by extrusion and sintering of powders of source metals. Reduction in size and mixing of the raw powder components in a planetary ball mill was investigated. The regularities of pressing the prepared mixtures and microstructure of materials sintered from them were determined. Samples of nicrosil and nisil thermocouple materials in the form of cylindrical rods with a diameter of about 5 mm and a length of 200 mm with an uniform microstructure were also fabricated by extrusion of prepared mixtures followed by sintering. Experimentally determined specific differential thermal EMF of the thermocouple made from the sintered rods coincided with the theoretical value.
Self-Propagating High-Temperature Synthesis of Boron-Containing MAX-Phase
Authors: Amosov Aleksandr P. , Latukhin Evgeniy I. , Petrov P.A. , Amosov E.A. , Novikov Vladislav A. , Illarionov A.Yu.
Published: July 2017

An attempt was made to obtain boron-containing MAX-phase by the process of self-propagating high-temperature synthesis (SHS) of Ti3AlC2, replacing some carbon atoms by boron atoms. This was conducted by burning powder mixtures (charges) of the composition 3Ti+2Al+2((1-x)C+xB), where x is the fraction of boron atoms (0.10, 0.15, 0.25, 0.50, 0.75, 0.90), replacing the carbon atoms. X-ray diffraction analysis of the products of combustion have shown that the replacement of carbon with boron to half of the content of carbon atoms in the charge (x=0.10-0.50), does not change the phase composition of the products, including Ti3AlC2 and TiC, but leads to a shift of the peaks of these phases in the diffraction pattern in the direction of smaller angles. When replacing more than half of the carbon atoms with the boron (x=0.75 and 0.90), the peaks of titanium carbide and MAX-phase are not observed, and the XRD peaks appear of the titanium borides TiB and TiB2, and intermetallic compound Al3Ti. Photomicrographs obtained with an electron microscope show that the SHS products synthesized from the charge with replacing up to half of the carbon atoms with the boron represent plates with a thickness of about 1 μm typical for MAX-phases, but rounded particles of borides and intermetallic compound of titanium appear at a higher boron content. Based on these results, it is concluded that replacement of a part (up to 50%) of the carbon atoms with boron atoms in the SHS charge 3Ti+2Al+2C leads to the synthesis of boron-containing MAX-phase based on the crystal lattice of Ti3AlC2.
Results of the Sheet Parts Curved Edges Constrained Bending with Elastomer
Authors: Moiseyev Viktor K. , Sharov Andrey A. , Gromova Ekaterina G. , Mantusov M.N.
Published: July 2017

Research of press-forming of the sheet parts with curved edges using the elastomer with tangent pressing of the material in the deformation center has been carried out. Suitability of the mathematical model has been confirmed. The results of the research have provided for elaboration of the method for designing the curved edges constrained bend process with elastomer that minimizes the bend radius, increases the part walls thickness, and decreases the edge springing angle.
Manufacturing of Axisymmetric Components out of Superalloys and Hard-to-Deform Steels by Roll Forming
Authors: Mukhtarov Shamil , Ganeev Artem , Nagimov Marsel , Shakhov Ruslan , Valitov Vener , Utyashev Farid
Published: July 2017

Heat-resistant alloys are the basic material of gas turbine engine (GTE) design. Fine-grained structure in these alloys can be formed by isothermal forging and then different axisymmetric GTE components as wheels, shafts, rings can be superplastic roll formed. Examples of the superplastic and isothermal deformation use for manufacturing components out of superalloys and steels for critical applications are given. The possibility of roll forming parts as rings with a diameter up to 800 mm and as flange - cone with a diameter up to 600 mm out of superalloys (Inconel 718, EK79, EP741NP), accordingly, on SRZHD-800 and modified PNC-600 mills were showed. The macrostructure investigations of the components after the roll forming showed that the homogeneous structure was formed. The microstructure at the flange portion was fine-grained and at membrane zone was coarse-grained. Cone part was roll formed at isothermal condition from pre-stamped chromium martensitic steel sheet. Manufacturing technology of roll forming was tested by computer and physical simulation. Service properties of components were obtained by subsequent heat treatment. The effectiveness of the technology associated with increased service properties of components and decreases the labor content by automated equipment.
Preliminary Numerical Analysis of a Masonry Panel Reinforced with Pultruded GFRP Profiles
Authors: Casalegno Carlo , Russo Salvatore , Sciarretta Francesca
Published: July 2017

The peculiarities of pultruded FRP profiles, i.e. low mass, durability and ease of construction, make them suitable for retrofitting traditional masonry structures, particularly in seismic areas. This could represent an effective solution, not yet sufficiently explored, that allows for non-invasive and reversible interventions, which improve the structural performance with a very small structural mass addition. The paper presents a FEM study on a hypothesis of retrofit of a traditional masonry building with pultruded FRP frame, adjacent to the masonry structure and connected to it with mechanical fasteners. The results appear promising and enlighten much increased in-plane strength and stiffness, as well as the change of the masonry failure mode into a more dissipative one.
Bank Material Study for the Restoration of Historical Monuments in Michoacán, Mexico
Authors: Seras Marco Antonio Navarrete , Chávez-García Hugo Luis , Molina Wilfrido Martínez , Guzmán Elia Mercedes Alonso , Arreola Sánchez Mauricio
Published: July 2017

Nowadays, most of the infrastructure building has inside its structural elements stony material. Over the years, the rocks have been widely used in construction, as stony material in a ceramic or cement matrix, or as a structural element in historical buildings. Physical characteristics are determined as: the present Humidity, Absorption, Density, specific Gravity, and mechanics as uni-axial Compression Resistance, besides Capillary Suction. We obtained images with Scanning Electron Microscopy (SEM) and we compared the physical and mechanical proofs with microphotographs. These studies help a restorer to use the rocks wisely and with the conviction that the rock is appropriate for the goals searched. The stony materials are found in a material bank called Comanja in Michoacán, Mexico.