bluuebunny/crossref_metadata_2025 huggingface dataset:
Corrosion Resistance of Medical Stainless Steel Obtained by Non-Vacuum Electron Beam Cladding
Authors: Ivanov Ivan V. , Tkachenko Elizaveta I. , Thoemmes Alexander
Published: February 2019

Pitting and crevice corrosion resistance of 321 stainless steel and non-vacuum electron-beam cladded stainless steel have been investigated by using potentio-dynamic polarization curve plotting. Lock-Ringer Salt Solution (LRSS) was used as biological media for corrosion test measurements. Microstructural research of samples after corrosion was carried out by using scanning electron microscopy. The experimental results show that the cladded stainless steel possesses higher pitting and crevice corrosion resistance.
Methodology and Installation of the Etching of the Surface Layer from Pipes, Rods and Profiles for the Aim of the Analysis of Residual Stresses
Authors: Shimov Georgy V.
Published: February 2019

The paper presents the design of the etching unit, the experiment procedure to remove a thin surface layer of metal and fixing the elastic discharge of the pipe along its length. The value of elastic discharge is necessary to calculate the residual stresses of a thin surface layer, as well as the distribution of residual stresses of the pipe wall.
Influence of the Profile Radius of the Deforming Roller on the Limit Degree of Deformation in the Process of Flow Forming
Authors: Udalov Andrey A. , Udalov Aleksander V. , Parshin Sergey V.
Published: February 2019

A theoretical investigation of the influence of the profile radius of the deforming roller on the limiting degrees of deformation in the process of flow forming is performed. Analytical and graphical dependencies allowing to determine the limiting degrees of deformation are obtained depending on the ratio of the profile radius of the roller to the initial thickness of the workpiece wall. The main practical ways of using the obtained dependences are considered. The results of the theoretical study are in good agreement with the known experimental data. The developed engineering technique can be used in designing the process of flow forming of cylindrical blanks by a torus roller.
The Study of Deformability of Heat-Resistant Alloy Named “Inconel Alloy 625” for Estimation of Plates Production Possibility at Wide-Strip Rolling “Mill 2300”
Authors: Deryabin Nikita S.
Published: February 2019

The hot deformation behavior of the Inconel alloy 625 was investigated through compression test within the temperature range of 850–1250 °C and the strain rate range of 0.1–30 s−1. Physically based mathematical model involving dynamic recovery and dynamic recrystallization processes has been proposed. Mathematical model allowed to calculate technological parameters of a rolling process of the “Inconel 625” at the hot rolling mill 2300. The pilot rolling operations showed that the possibility of the “Inconel 625” production exists. But it is necessary to provide the design changes of the cooling system of the work rolls. The article addressed the cracking behavior of nickel alloys in industries such as chemical process, nuclear generation, aircraft engine production.
Tubes’ Rupture at Faulty Fusion of Welding Seam
Authors: Shinkin Vladimir N.
Published: February 2019

In the straight-seam tubes, the appearance of defects in the area of the welding seam welded under the flux layer and the seam geometry are closely related to the technology and metallurgy of welding process. Possible defects are the pores, incisions, slag inclusions and cracks. The pores can appear in different shapes, with different distribution and in different amounts during the solidification of welding seam. When molten metal solidifies, the gas bubbles can come to the surface or remain inside the metal. The incisions may occur due to the fact that the juncture is not completely filled. Such incisions, passing most often along the edge of welding seam, are explained by the discrepancy between the amount of metal deposited per unit of time and the volume of the juncture. The occurrence of the slag inclusions is determined by the metallurgical reactions between the slag and the drop, separating from the end of the electrode, as well as the bath of molten metal. The cracks differ depending on the size, the nature of location and the causes. There are the macro-cracks and micro-cracks, the hot and cold cracks. In this paper the critical in-tube pressure, at which the destruction of tube occurs at the partial faulty fusion of the tube’s welding seam, is obtained. The results can be used in the diagnosis of the causes of the destruction of the steel large-diameter tubes of the main gas-oil tube-lines.
Evaluation of the Effectiveness of Plasma Torches Design for Metal Cutting by Qualimetric Method
Authors: Matushkina I.Y. , Anakhov S.V. , Pyckin Yu.A.
Published: February 2019

For experimental substantiation of plasmatrons work efficiency the technological regulations of quality and safety parameters test for plasma-arc cutting of metals technology are taken. For the integral evaluation of the obtained results it is proposed to use the methods of qualimetric analysis adapted to the technology of plasma cutting. The obtained integral parameters indicate the effectiveness of the new plasmatrons, designed by the authors in comparison with previously produced analogues, as well as with modern domestic and foreign samples.
Research of Laser Welding of Thin-Sheet Structural Steels by Pulsed Laser Radiation
Authors: Gabdrakhmanov Azat T. , Israphilov Irek H. , Shafigullin Lenar N.
Published: February 2019

Specific features of the formation of welded metals under the pulsed action of laser radiation are described. It is shown that the quality of the technological process of welding depends on the energy characteristics of the laser technological complex, the temperature of the surface layer. The results of experimental studies on the effect of pulsed laser radiation on steel 08YU with the possibility of obtaining a welded seam with the required quality indices are presented.
The Comparison Research of Plasma Surface Hardening of 34CrNiMo6 Steel Produced on Direct and Reversed Polarity Current
Authors: Belinin Dmitry S. , Neylybin Sergei D. , Shitsyn Yuri D.
Published: February 2019

Many product parameters are basically determined by the state of the surface layer of the material from which it is produced. Increasing the hardness of the surface layer with unique core characteristics will significantly improve the performance characteristics of products and expand field of application of 34CrNiMo6 steel. The paper presents the results of a study of the surface plasma hardening of 34CrNiMo6 steel on direct and reversed polarity current. Studies of four possible variants of plasma surface quenching, including processing with scanning and processing in closed arc mode were carried out. The results of measuring geometric characteristics and hardness of the produced hardened layers are given. The possibility of producing hardened layers with a hardness up to 52 HRC is shown. The macro-and microstructure of the produced hardened layers using light microscopy was studied. The features of structure formation in layers hardened in different variants are analyzed. It is shown that it is possible to produce hardened layers with a depth of 1.7 mm and a width of up to 24 mm in the finishing plasma treatment without significant changes in the surface roughness.
Effect Study of Thermal Cutting Methods on the Edge’s Microstructure of High-Strength Steel Grade S700MC
Authors: Ilin Ivan A. , Krasnoperova Anna A. , Sirotkin Evgenii A.
Published: February 2019

The paper presents the results of metallographic studies of laser and plasma cutting methods of high-strength steel for the purpose of its application for the preparation of sample edges without subsequent machining. It is shown that as a result of the thermal and physical-chemical processes in heat affected one (HAZ), there is a change in the phase and chemical composition of the metal. The depth of the HAZ is changed from 261 μm to 337 μm. The maximum hardness at the cutting edge is 410 HV10. On the surface after the laser cutting there is an oxidized layer of metal, saturated with oxygen, nitrogen and other gases as a result of contact with the oxygen jet and the surrounding air; its thickness is hundredths or even thousandths of a millimeter. A feature of the plasma cutting method is the formation of a deeper oxide layer on the surface with a thickness of 9...14 μm, in contrast to the laser cutting method. The analysis of existing research to improve the technology of repair welding of low-carbon steel is performed. The obtained results can be used in the development of high-strength steel grades welding technology in terms of preparation of edges for welding using thermal cutting methods, which are currently quite conservative.
Dependence of Cold Cracks Formation from the Heat Input when Welding of High Strength Steel with Yield Strength of 500 MPa
Authors: Ivanov M.A. , Alruhaimi A.G. , Voronin S.I.
Published: February 2019

The weldability of high strength steel of grade 10G2FBY with a yield strength of 500 MPa is conducted in this paper according to the criterion of cold cracks formation in the seam root of plates with a thickness of 18 and 36 mm. The study was carried out in accordance with GOST 26388-84 on samples of type IX at ambient temperatures from –20 to +20 °С at heat input energy from 5.8 to 14.3 kJ/cm. After welding, the plates were cooled in the air for 24 hours. The main criterion for assessing weldability is the presence or absence of cold cracks after welding. The welding was made with a soft wire 4Y42 with a yield strength of 420 MPa. Cold cracks in high strength steel 10G2FBU for thicknesses of 18 and 36 mm are not detected in heat input over 10.3 kJ/cm by welding at the temperature of +20 °С, at the same time when welding at an ambient temperature of -20 °С cracks are not detected when running over energy of 14.7 kJ/cm. Critical cooling rate in which no cracks appeared was 55 °С/s at the temperature of welding +20 °С, and it was 44 °С/s at a temperature of welding –20 °С for both thicknesses. The criterion HVmax<300 HV is a necessary but insufficient condition for the prevention of cold cracking in steels of the type 10G2FBU. In the conditions of the experiment, cold cracks in the weld seam are absent at a hardness of no more than 250-260 HV, which is probably due to the presence of diffusive hydrogen, which is not regulated in the regulations for the supply of this steel grade
Selective Laser Melting of Mixed EP648-Alumina Powder
Authors: Baitimerov R.M. , Liberzon A.B. , Mitin V.I.
Published: February 2019

Selective laser melting (SLM) technology makes it possible to produce complex shape metallic and metal-matrix composite (MMC) bulk parts from powder feedstock. This paper is devoted to selective laser melting of mechanically mixed metal (gas atomized EP648 alloy) and ceramic (alumina) powders. Four 10x10x5 mm specimen were successfully manufactured using different process parameters. Obtained MMC specimen were characterized by scanning electron microscopy. A possibility of manufacturing of dense EP648-alumina MMC by SLM using two-component mixed powder was shown
CAN BASE EXCESS BE USED FOR PREDICT TO NEONATAL SEPSIS IN PRETERM NEWBORNS?
Authors: Arayıcı Sema
Published: February 2019

Background: Neonatal sepsis remains an important and potentially life-threatening clinical syndrome and a major cause of neonatal mortality and morbidity. The aim of this study to investigate whether values of base excess before the onset of clinical signs and symptoms of sepsis indicate infection in the early diagnosis of neonatal sepsis.

Methods: In this study a total of 118 infants were enrolled. The infants were classified into two groups: group 1 (sepsis, n=49) and group 2 (control, n=69). Blood gas analysis investigated for screening of neonatal sepsis.

Results: A total of 49 newborns with neonatal sepsis and 69 healthy controls were enrolled. A comparison of markers of sepsis revealed C-reactive protein, interleukin-6 level to be significantly higher and pH, pCO2, HCO3 and base excess values to be significantly lower in newborns with sepsis compared healthy controls (p<0.01). The optimum cut-off value in the diagnosis of neonatal sepsis was found to be -5 mmol/L for base excess. Sensitivity, specificity, positive predictive value and negative predictive value of this base excess cut-off for neonatal sepsis were 75, 91, 86 and 84% respectively.

Conclusion: This is the first study to determine the relationship between the decrease value of base excess and early stage of neonatal sepsis. If the value of base excess <-5 mmol/L without an underlying another reason, may need close follow up of infants for neonatal sepsis and it may help early diagnosis.
Prevalence and risk factors of diabetic peripheral neuropathy in patients with Type 2 diabetes mellitus
Authors: Elbarsha Abdulwahab , Hamedh Mohamed , Elsaeiti Muftah
Published: February 2019

Background: Diabetic peripheral neuropathy (DPN) is common among people with diabetes and can result in foot ulceration and amputation. Objective: The objective of the study is to estimate the prevalence and risk factors of DPN among patients with Type 2 diabetes mellitus (T2DM) at a diabetes clinic in Benghazi Medical Center (BMC), Benghazi, Libya. Patients and Methods: Three hundred and sixty-seven patients with T2DM (127 [34.6%] males and 240 [65.4%] females) were included in this cross-sectional study. The patients aged ≥18 years, and they attended the outpatient diabetes clinics at BMC from May 2015 to October 2016, for routine follow-up. Patients with T1DM, gestational diabetes, and latent autoimmune diabetes in adults were excluded. Data including gender, age, type of DM, duration of DM, history of smoking, history of hypertension, weight, height, glycosylated hemoglobin (HbA1c), total cholesterol, triglyceride, low-density lipoprotein, high-density lipoprotein, creatinine, and urea were obtained by a prepared pro forma. Peripheral neuropathy was diagnosed in the presence of numbness, paresthesia, 10-g monofilament examination, and loss of vibration and joint position sensations. The relationship between DPN and its risk factors, in addition to independent predictors of DPN, was explored using multiple forward stepwise logistic regression and presented as an odds ratio (OR) and 95% confidence interval (CI). Results: The prevalence of DPN was 30.5% in the studied group. A statistical significant association found between DPN and age (P = 0.014), duration of DM (P < 0.001), macrovascular complications of DM (P < 0.001), diabetic retinopathy (P = 0.001), diabetic nephropathy (P < 0.001), poor glycemic control (high HbA1c) (P < 0.001), hypertension (P = 0.011), uncontrolled blood pressure (≥140/90 mmHg) (P = 0.007), and insulin treatment (P < 0.001). Multiple forward stepwise logistic regression analyses revealed two independent risk factors influencing DPN: diabetic nephropathy (OR = 1.976, 95% CI: 1.289–3.027) (P = 0.009) and insulin treatment (OR = 3.430, 95% CI: 2.021–5.821), (P < 0.001). Conclusions: The overall prevalence rate of DPN in this study was 30.5% among patients with T2DM. It increases with the presence of diabetic nephropathy and insulin treatment.
Appendiceal necrosis resulting from cecal lipoma-induced ileocolic intussusception
Authors: Alsharif Jamal , Abdulrahman Abdugadir , Asfor Melad , Suwalem Munir , Benhsona Ahmed
Published: February 2019

Ileocolic and colocolic intussusception with an inflamed appendix is a rare clinical entity in adults, particularly when caused by lipoma. A 48-year-old female nurse presented with recurrent, intermittent, central, colicky abdominal pain for 2 months. It became constant the night before admission and was associated with abdominal distension and large palpable mass at the right lower quadrant. An exploratory laparotomy was carried out and. The operative findings were ileocolic and colocolic intussusceptions with large cecal mass (lipoma) about 5 cm × 5 cm as a lead point just close to the ileocecal valve with an inflamed appendix, ileocolic resection was performed. Assessment of the resected specimen confirmed the diagnosis. Cecal lipoma should be considered in the differential diagnosis of cecal mass causing ileocecal intussusception.
Plataforma Modular Reconfigurable como Nueva Filosofía para el Desarrollo de Electrónica Vehicular Actualizable
Authors: Cañas V. , García. A. , De las Morenas J. , Blanco J.
Published: February 2019

Se presenta una nueva concepción en el desarrollo de Unidades Electrónicas de Control (ECU), también denominadas Unidades  de a Bordo (OBU), desde una visión ontológica orientada en la compatibilización de los vehículos con las futuras tecnologías emergentes en el campo de la automoción. Se comienza por un estudio teórico que analiza la problemática en el sector del transporte que va a presentar la convivencia entre los vehículos actuales y los que van a ir apareciendo en el futuro; y que vendrán influenciados por conceptos tales como los vehículos conectados o los vehículos autónomos. Este artículo también aporta una nueva metodología en el diseño de unidades vehiculares de a bordo, basada en el concepto de unidades electrónicas modulares que definen su funcionalidad en base a los módulos que le sean acoplados. Adicionalmente se ha desarrollado un prototipo completo y totalmente funcional con el fin de analizar las posibilidades de la solución propuesta.
Control Deslizante Fraccionario de la Trayectoria y Orientación de un Quadrotor con Cargas Suspendidas Desconocidas
Authors: Ibeas Asier , Ullah Nasim , Ali Muhammah Asghar , Herrera Jorge Aurelio
Published: February 2019

Este artículo diseña un sistema de control para el problema de seguimiento de trayectorias de un vehículo quadrotor con una carga suspendida desconocida. La presencia de esta carga desconocida incrementa considerablemente la complejidad del problema y su oscilación actúa como una perturbación incierta que afecta a la dinámica propia del vehículo. De esta forma, la trayectoria global del quadrotor puede verse enormemente afectada a pesar de la existencia de un controlador nominal para él. Este artículo propone el diseño de un control deslizante de orden fraccionario para la solución de este problema. Junto con el diseño de la ley de control, se prueba la estabilidad del sistema en lazo cerrado a través del método de Lyapunov para sistemas fraccionarios. El desempeño obtenido por el controlador propuesto se compara con el control en modo deslizante clásico observando que el controlador propuesto mejora significativamente los resultados obtenidos
Metodología de programación dinámica aproximada para control óptimo basada en datos
Authors: Díaz Henry , Armesto Leopoldo , Sala Antonio
Published: February 2019

En este artículo se presenta una metodología para el aprendizaje de controladores óptimos basados en datos, en el contexto de la programación dinámica aproximada. Existen soluciones previas en programación dinámica que utilizan programación lineal en espacios de estado discretos, pero que no se pueden aplicar directamente a espacios continuos. El objetivo de la metodología es calcular controladores óptimos para espacios de estados continuos, basados en datos, obtenidos mediante una estimación inferior del coste acumulado a través de aproximadores funcionales con parametrización lineal. Esto se resuelve de forma no iterativa con programación lineal, pero requiere proporcionar las condiciones adecuadas de regularización de regresores e introducir un coste de abandono de la región con datos válidos, con el fin de obtener resultados satisfactorios (evitando soluciones no acotadas o mal condicionadas).
Is the Flipped Classroom Method Useful for Teaching Project Management?
Authors: Ingason Helgi Thor , Gudmundsson Gisli Runar
Published: February 2019

A teaching method known as the flipped classroom has become increasingly popular in recent years and the method is now widely used around the world at all levels of the education system. This paper seeks to examine and elucidate the concept of the flipped classroom method as well as scrutinize its varying manifestations within educational settings, focusing particularly on the question of whether the teaching method is a fruitful teaching strategy for project management. Data gathering was based on an analysis of research literature focusing on the application of the flipped classroom as well as interviews conducted with both teachers and students associated with a master’s degree program in project management at Reykjavik University. The interviews sought to extract perspectives of both teachers and students with regard to their experiences of the flipped classroom method in contrast to conventional teaching methods. Finally, the paper will present the findings from an analysis comparing test results from an international certification examination in project management for two groups of students. One group attended lessons where the flipped classroom method was applied whereas the other group was instructed using traditional teaching methods.The findings of the study reveal that the flipped classroom method is a fruitful and relevant strategy for teaching and learning project management. The findings show that the students were more positive toward the method than the teachers. Furthermore, the students were generally more receptive to new teaching methods than the teachers were. 60% of the students who attended lessons that used the flipped classroom claimed that it had aided them in preparing for the certification examination.
MAPPING OF LAND-COVER CHANGE ANALYSIS IN MA’RIB AT YEMEN USING REMOTE SENSING AND GIS TECHNIQUES
Authors: Al-Akad S. , Akensous Y. , Hakdaoui M. , Al-Nahmi F. , Mahyoub S. , Khanbari K. , Swadi H.
Published: February 2019

Abstract. Studies on the change in occupation and land-use are of great importance in order to understand landscape dynamics in the process of agricultural land degradation, urbanization, desertification, deforestation and all change in the landscape global of a region. The most effective procedure to measure the degree of land-cover and land-use changes is the multi-date study. For this purpose, the aim of this work is to analyze the current evolution of land-use and land-cover (LULC) using remote sensing techniques, in order to better understand this evolution. For this purpose, a diachronic approach is applied to satellite images acquired in 1987 to 2018 of Ma’rib city Yemen. The LULC maps we obtained were produced from different image analysis procedures (non-supervised classification and recode technique) to map the land-use and land-cover. The objective of this study is to apply reproducibly and generalizable a predefined nomenclature to different scenes of satellite images. The first step consists in interpreting the radiometric classes obtained by non-supervised classification so as to form the classes of the thematic nomenclature. An improvement of the classification is then obtained by using the recode technique which makes it possible to correctly reassign the previously badly classified pixels of the satellite images classification. Land-cover maps obtained from remote sensing were used to quantify the rate of change (Tc) and (Tg) of area occupied by each class. The results will indicate the most changeable period and the percentage of overall change in the study area (Ma’rib Yemen), and helped to identify and characterize the spatial and temporal evolution of land use in the district over a period of thirty-one years (1987 to 2018). They reveal that annual average rates of decline for the water body is −83.5% and −9.96% for the sandy land. However, it was observed an increase in built-up area 365.52% and farm land 324.52% classes.
FUSING OF OPTICAL AND SYNTHETIC APERTURE RADAR (SAR) REMOTE SENSING DATA: A SYSTEMATIC LITERATURE REVIEW (SLR)
Authors: Mahyoub S. , Fadil A. , Mansour E. M. , Rhinane H. , Al-Nahmi F.
Published: February 2019

Abstract. Remote sensing and image fusion have recognized many important improvements throughout the recent years, especially fusion of optical and synthetic aperture radar (SAR), there are so many published papers that worked on fusing optical and SAR data which used in many application fields in remote sensing such as Land use Mapping and monitoring. The goal of this survey paper is to summarize and synthesize the published articles from 2013 to 2018 which focused on the fusion of Optical and synthetic aperture radar (SAR) remote sensing data in a systematic literature review (SLR), based on the pre-published articles on indexed database related to this subject and outlining the latest techniques as well as the most used methods. In addition this paper highlights the most popular image fusion methods in this blending type. After conducting many researches in the indexed databases by using different key words related to the topic “fusion Optical and SAR in remote sensing”, among 705 articles, chosen 83 articles, which match our inclusion criteria and research questions as results ,all the systematic study ‘ questions have been answered and discussed.
DETECTION OF CRESCENT SAND DUNES CONTOURS IN SATELLITE IMAGES USING AN ACTIVE SHAPE MODEL WITH A CASCADE CLASSIFIER
Authors: Azzaoui M. A. , Adnani M. , El Belrhiti H. , Chaouki I. E. , Masmoudi L.
Published: February 2019

Abstract. Crescent sand dunes called barchans are the fastest moving sand dunes in the desert, causing disturbance for infrastructure and threatening human settlements. Their study is of great interest for urban planners and geologists interested in desertification (Hugenholtz et al., 2012). In order to study them at a large scale, the use of remote sensing is necessary. Indeed, barchans can be part of barchan fields which can be composed of thousands of dunes (Elbelrhiti et al.2008). Our region of interest is located in the south of Morocco, near the city of Laayoune, where barchans are stretching over a 400 km corridor of sand dunes. We used image processing techniques based on machine learning approaches to detect both the location and the outlines of barchan dunes. The process we developed combined two main parts: The first one consists of the detection of crescent shaped dunes in satellite images using a supervised learning method and the second one is the mapping of barchans contours (windward, brink and leeward) defining their 2D pattern. For the detection, we started by image enhancement techniques using contrast adjustment by histogram equalization along with noise reduction filters. We then used a supervised learning method: We annotated the samples and trained a hierarchical cascade classifier that we tested with both Haar and LBP features (Viola et Jones, 2001; Liao et al., 2007). Then, we merged positive bounding boxes exceeding a defined overlapping ratio. The positive examples were then qualified to the second part of our approach, where the exact contours were mapped using an image processing algorithm: We trained an ASM (Active Shape Model) (Cootes et al., 1995) to recognize the contours of barchans. We started by selecting a sample with 100 barchan dunes with 30 landmarks (10 landmarks for each one of the 3 outlines). We then aligned the shapes using Procrustes analysis, before proceeding to reduce the dimensionality using PCA. Finally, we tested different descriptors for the profiles matching: HOG features were used to construct a multivariate Gaussian model, and then SURF descriptors were fed an SVM. The result was a recursive model that successfully mapped the contours of barchans dunes. We experimented with IKONOS high resolution satellite images. The use of IKONOS high resolution satellite images proved useful not only to have a good accuracy, but also allowed to map the contours of barchans sand dunes with a high precision. Overall, the execution time of the combined methods was very satisfying.
DIGITAL SURVEY AND ALGORITHMIC MODELING IN HBIM. TOWARDS A LIBRARY OF COMPLEX CONSTRUCTION ELEMENTS
Authors: Bagnolo V. , Argiolas R. , Cuccu A.
Published: February 2019

Abstract. In the study of built heritage, the introduction of BIM models provides the advantage of a set of data that can be shared between different platforms. Despite the continuous progress in research, the modeling processes of complex construction elements, typical of historical architectures, always require a certain attention and care that involve considerable investments in terms of both resources and time. In this paper we present the first results of an ongoing research aimed at considering possible methods that can allow a simplification of the modeling processes of elements of historical architectures in the BIM environment. In particular, the research aims to explore the possibilities offered by the algorithmic modeling of complex construction elements. In the study of historical architecture, an enough recurring theme concerns those elements that can be traced back to the principles of architectural orders. In the survey of historical architecture, a quite recurring case study concerns those elements or parts of building ruled by the principles of architectural orders. One of the first elements taken into consideration was that of the column that, in its articulation in base, shaft and capital, offers three different levels of complexity of the modeling process very suitable for the research path. Starting with a collection of data acquired from digital photogrammetric modeling, we considered a initial set of different case studies that allowed us to conduct a first working hypothesis by embracing a quite wide range of possible variations starting from a basic column.
3D CITY MODELLING OF ISTANBUL BASED ON LIDAR DATA AND PANORAMIC IMAGES – ISSUES AND CHALLENGES
Authors: Buyuksalih G. , Baskaraca P. , Bayburt S. , Buyuksalih I. , Abdul Rahman A.
Published: February 2019

Abstract. This paper describes the generation of 3D city modelling of LoD2 and LoD3 buildings based on 3D point clouds data and other auxiliary data for Istanbul city, Turkey. The project is being undertaken by Istanbul Greater Municipality (IBB) since October 2012. The aim is to provide 3D information to the relevant city planning departments within IBB. The development of the 3D city model utilized several data acquisition techniques, software and computing tools as part of the methodology. The tools include from Riegl, TerraSolid, TerraScan, FME Workbench, MicroStation, and other visualization tools. The generated 3D city models illustrate how the high-resolution point clouds and 3D modelling play major role in such development. This paper also highlights several issues and challenges of the development, i.e. from data acquisition, processing of point clouds and the 3D modelling of buildings.
THE CONTRIBUTION OF SENTINEL-2 SATELLITE IMAGES FOR GEOLOGICAL MAPPING IN THE SOUTH OF TAFILALET BASIN (EASTERN ANTI-ATLAS, MOROCCO)
Authors: Fal S. , Maanan M. , Baidder L. , Rhinane H.
Published: February 2019

Abstract. Geological mapping in desert, mountainous or densely vegetated areas are sometimes faced with many constraints. Recently several remote sensing methods are used on ASTER or LANDSAT imagery for making that task easier. The aim of this paper is to evaluate the applicability of some of these methods on Sentinel-2A images. The study, therefore, focuses on a lithological classification using these multispectral images in the south of the Tafilalet basin. To achieve this goal, two L1C level images were used. Decorelation stretch combined with the optimal index factor (OIF) and Minimum Noise Fraction (MNF) were the main improvements used for RGB combination images. The classifiers Spectral Angle Mapper (SAM) and the Maximum Likelihood classifier (MLC) have been evaluated for a most accurate classification to be used for our lithofacies mapping. The latest drawn geological maps and RGB images of false colour combinations were used to select regions of interest (ROI) as the endmembers to use for these classifiers. Obtained results showed a clear discrimination of the different lithological units of the study area. Classifications evaluation showed that the Maximum likelihood classifier is more accurate with an overall accuracy of 76% and a Kappa coefficient is 0.74. Finally, this study has shown the importance of the use of sentinel-2 multispectral images in geological mapping and has shown that the high spectral resolution of the VNIR and SWIR bands creates a synergy with the high spatial resolution for optimal lithological mapping.
COMPARATIVE ANALYSIS OF 3D PHOTOGRAMMETRY MODELING SOFTWARE PACKAGES FOR DRONES SURVEY
Authors: Hinge L. , Gundorph J. , Ujang U. , Azri S. , Anton F. , Abdul Rahman A.
Published: February 2019

Abstract. Drones are becoming popular in spatial mapping or survey. The use of drones survey can be seen from it low flying heights (capable to create a clear images), accessible on difficult or non-friendly vehicle access areas, faster data acquisition and higher data resolution henceforth improve the quality of the survey. However, this paper focuses on the post-processing of drone images for 3D surface modeling. With the motivation of producing better 3D models, four software packages are used for comparison. Those software packages are eyesMap3D, Drone Deploy, Agisoft PhotoScan and Pix4Dmapper. The equipment used to ensure a high level of quality model is the Leica GPS1200+ stationary GPS module and the DJI Phantom 4 PRO drone. The Leica GPS1200+ stationary GPS module were used to track the exact position of tie points on the ground. Meanwhile the DJI Phantom 4 PRO drone is used as data inputs (images) for the software packages stated. In addition, the drone is used to fly over a golf course, with a challenge of homogenous surface for 3D surface modeling. Based on the output, it shows that each software packages produces slightly different outputs. This paper summarizes the outputs and discusses the key elements in each software packages. This variation might be useful for future references in 3D surface modeling that can conform in different applications requirements.
Reading the Tea Leaves: Sifting through Jicarilla and Garner to Construct a Workable Fiduciary Exception Framework for ERISA Insurers
Authors: Hages Ted A.
Published: February 2019

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La construcción de la alteridad. Cine e inmigración en la era socialista
Authors: Gordillo Inmaculada
Published: February 2019

España durante la era socialista (1982-1996) vivió profundos cambios que inevitablemente se reflejan en la producción audiovisual de la época. Uno ellos atañe a la llegada de inmigrantes para trabajar en nuestro país. En esta época  el inmigrante empieza a ser un personaje de nuestro cine pero su forma de aparecer puede ser diferente: como mero elemento paisajístico (personaje secundario del que no se muestra ni su problemática ni su personalidad),  o por el contrario, un personaje sobre el que gira la trama y al que se le otorga una atención sustancial. Podemos considerar que estamos, en este último supuesto, ante el Cine de la alteridad. En este artículo se intentan establecer las bases narrativas de este cine surgido en la era socialista a partir de un estudio de casos con el análisis de dos discursos audiovisuales aparentemente muy diferentes: Las cartas de Alou (Montxo Armendariz, 1990) y Ciudadanos bajo sospecha (Llorenç Soler, 1993).
Cuerpos adolescentes en el cine español 1982-1998
Authors: Brémard Bénédicte
Published: February 2019

El presente artículo propone esbozar un panorama de las representaciones de adolescentes en el cine español durante los gobiernos socialistas a partir de 1982 y hasta 1998. Tras la reivindicación de la libertad propia de la Transición, en que el adolescente tenía a menudo la autonomía de un adulto, el cuerpo adolescente del período posterior traduce más bien en la pantalla un abanico de deseos frustrados. También es un cuerpo malherido por los excesos de todo tipo, el consumo en abuso de drogas o imágenes, quizás un fantasma más que un cuerpo dado que nunca llega a figurar la revolución que es (o que debería ser) la adolescencia.
Síntomas y testigos de un cine en cambio
Authors: Sánchez Noriega José Luis , Brémard Bénédicte
Published: February 2019

Presentación del número monográfico
Transparencia y rendición de cuentas: exigencias de la Responsabilidad Social de las Cooperativas no Agropecuarias en Cuba
Authors: Bencomo Fariñas Yaneisi , Fernández Pacheco Daimi
Published: February 2019

La vinculación entre los principios cooperativos y los valores que el cooperativismo promueve, y el compromiso inherente en el propio concepto de la Responsabilidad Social, justifican la necesidad de que las cooperativas articulen mecanismos en sus procesos de gestión para canalizar el conjunto de sus esfuerzos en favor de una mayor Responsabilidad Social. A tales fines, estos sujetos han de contar con un modelo de gestión social que implique la concertación de prácticas transparentes de rendición de cuentas que impulsen la justicia social, la equidad y el desarrollo local por medio del cumplimiento consecuente de los principios y valores de la filosofía cooperativista. De tal modo, serán necesarias políticas, planes estratégicos, iniciativas concretas, canales de comunicación, en fin, una estructura formal que apoye este proceso de gestión, dotado de mecanismos para la evaluación y el control; acciones todas encaminadas a dar respuesta a las expectativas de sus grupos de interés, así como mejorar la transparencia y la legitimidad de las cooperativas. Es objetivo del presente trabajo analizar, desde una posición crítica, las principales limitaciones jurídicas y prácticas existentes en torno al cumplimiento y control de la Responsabilidad Social Cooperativa de las Cooperativas no Agropecuarias en Cuba. En vistas a su cumplimiento, en primer lugar, se sistematizan posiciones doctrinales sobre la relación existente entre transparencia y Responsabilidad Social, dada la vinculación entre los principios inspiradores de la cultura cooperativa y la Responsabilidad Social Cooperativa, y de esta última con los niveles de divulgación de información. Se concluye con reflexiones sobre el papel que desempeña el Balance Social Cooperativo como instrumento de rendición de cuentas que exige y demanda una gestión cooperativa más transparente en el desarrollo de la misión social que, unida al despliegue de su actividad económica, debe ser cumplida por las cooperativas cubanas.
Cómo “cucharear” dinero del mar:
Authors: Fahrenbruch Matthew L.
Published: February 2019

La población del este de Asia ha consumido medusas por más de mil años. Por mucho tiempo, China ha sido el principal proveedor y consumidor. Fuerzas económicas y medio ambientales están empujando este mercado fuera de China y al interior de sociedades que no tienen tradición de captura ni consumo de medusas. La investigación, ejecutada alrededor de las comunidades de Bilwi y Tuapí, en la región autónoma del norte de Nicaragua, reporta la emergencia de una industria de producción de medusas a lo largo de la costa miskita en Nicaragua, lo cual parece tener un impacto significativo en la sociedad y economía locales. Esto está generando oportunidades de actividades asalariadas para los hombres miskitos, diferentes del buceo para capturar langostas, una ocupación peligrosa y frecuentemente mortal.
Entre tradición y experiencia:
Authors: Bénat Tachot Louise
Published: February 2019

Esta investigación nos muestra cómo la transmisión de los conocimientos botánicos de las sociedades prehispánicas a Europa ha permitido la integración de la farmacopea americana a la dinámica general del saber científico tanto a nivel médico como cosmográfico, astronómico y técnico. Esto ha sido posible a partir de las crónicas de Indias y mediante el desarrollo de un proceso de superación de las graves limitaciones eurocéntricas del estudio histórico de la medicina. Los datos recabados por la autora manifiestan la enorme importancia que tuvo el tema de la naturaleza americana y el aporte de ésta a la epistemología de la ciencia medicinal. Esta revelación generó un proceso amplio y a la vez descriptivo e interpretativo por parte de los europeos ya desde inicios del siglo XVI.
Sihkru Tara
Authors: Renold Jaye
Published: February 2019

El Sihkru Tara es un rito festivo binacional que cada año lo realizan conjuntamente las poblaciones miskitas de Nicaragua y Honduras. Hacen esto para celebrar y fortalecer su identidad indígena en un intercambio cultural entre generaciones. También para comunicarse con los espíritus de los ancestros, generar cercanía y solidaridad y analizar las amenazas que como pueblo enfrentan actualmente. La autora de este artículo registra todo esto a través de una crónica iluminada también por el flash de su cámara fotográfica durante los cinco días que duró este evento a finales del año pasado.
n.7 - A PRODUÇÃO ACADÊMICA EM POLÍTICAS PARA A EDUCAÇÃO INFANTIL NO BRASIL (2000-2010)
Authors: Monção Maria Aparecida Guedes , Trindade Syomara Assuite
Published: February 2019

O objetivo do artigo é mapear os estudos em políticas educacionais na área da educação infantil, em teses e dissertações, no período de 2000 a 2010. Trata-se de uma pesquisa de revisão, que analisou 57 resumos, buscando sistematizar a produção e apresentar as principais conclusões. A maior parte dos trabalhos analisados versa sobre a ampliação da oferta após a incorporação da educação infantil na educação básica. Conclui-se que, apesar dos esforços empreendidos pelo poder público, as vagas ainda são insuficientes e que a adoção de preceitos neoliberais na implementação das políticas afeta sua qualidade, especialmente com a manutenção do atendimento conveniado e a precarização das condições de trabalho dos profissionais.
Ethics guiding the action of the hospital manager
Authors: Rego Amélia , Araújo Beatriz
Published: February 2019

Objective: We believe there are ethical issues that emerge in the management of hospital health units, therefore in this article we discuss the interface between the areas of Bioethics and Management. This research aims to contribute to the operationalization of a profile of ethical competencies to manage hospitals with ethical weighing and linkage to values.Methods: This is an exploratory and descriptive study with 421 hospital managers of 25 hospitals in the northern zone of Portugal, integrated in the National Health Service. To collect data, we used the Questionnaire of Ethicity in Hospital Management and analyzed the contents of the electronic pages of 36 hospitals about the mission, values and vision they advocate.Results: In addition to the philosophical perspective of each person, health professionals in hospital management respect the complex multidimensionality, recognizing the singularity and the personal, social and cultural individuality. Values and personal ethics can be a guide for action in the field of health. In the results of this study, we present a framework of ethical competencies for the management of the hospital, which aims to optimize management with ethical weighing with the following dimensions: Decision, Primacy of the human person, Responsibility, Integrity, Training and development, Equity and access, Organization and Social Responsibility.Conclusions: Based on the results of this study, we conclude that there is a need to implement a matrix of ethical competencies that guide health professionals to respect people and their rights – in the management of health care and services, in clinical practice or in scientific investigation. The managers of the hospitals integrate the guidelines in the code of ethics of their professional group and in the mission, values and institutional vision. Overall, they claim to have a framework of ethical competencies, acting with reference to the ethical paradigm of personalism.
Reviewer Acknowledgements for Higher Education Studies, Vol. 9, No. 1
Authors: Lin Sherry
Published: February 2019

Higher Education Studies wishes to acknowledge the following individuals for their assistance with peer review of manuscripts for this issue. Their help and contributions in maintaining the quality of the journal are greatly appreciated.

Higher Education Studies is recruiting reviewers for the journal. If you are interested in becoming a reviewer, we welcome you to join us. Please find the application form and details at http://recruitment.ccsenet.org and e-mail the completed application form to hes@ccsenet.org.

Reviewers for Volume 9, Number 1

Abdelaziz Mohammed, Albaha University, Saudi Arabia

Ana-Cornelia Badea, Technical University of Civil Engineering Bucharest, Romania

Anna Liduma, University of Latvia, Latvia

Antonina Lukenchuk, National Louis University, USA

Arbabisarjou Azizollah, Zahedan University of Medical Sciences, Iran

Ausra Kazlauskiene, Siauliai University, Lithuania

Barbara N. Martin, University of Central Missouri, USA

Carmen P. Mombourquette, University of Lethbridge, Canada

Deniz Ayse Yazicioglu, Istanbul Technical University, Turkey

Dibakar Sarangi, Teacher Education and State Council for Educational research and Training, India

Evrim Ustunluoglu, Izmir University of Economics –Izmir/Turkey, Turkey

Firouzeh Sepehrianazar, Orumieh university, Iran

Geraldine N. Hill, Elizabeth City State University, USA

Gerard Hoyne, School of Health Sciences, University of Notre Dame Australia, Australia

Gregory S. Ching, Fu Jen Catholic University, Taiwan

Hüseyin Serçe, Selçuk University, Turkey

Jayanti Dutta, Panjab University, India

Jisun Jung, University of Hong Kong, Hong Kong

John Cowan, Edinburgh Napier University, United Kingdom

John Walter Miller, Benedict College in Columbia, USA

Laid Fekih, University of Tlemcen Algeria, Algeria

Lung-Tan Lu, Fo Guang University, Taiwan, Taiwan

Mehmet Ersoy, Department of Computer Education and Instructional Technologies, Turkey

Mei Jiun Wu, Faculty of Education, University of Macau, China

Meric Ozgeldi, Mersin University, Turkey

Mirosław Kowalski, University of Zielona Góra, Poland

Nicos Souleles, Cyprus University of Technology, Cyprus

Okedeyi Sakiru Abiodun, Adeniran Ogunsanya College of Education, Nigeria

Philip Denton, Liverpool John Moores University, United Kingdom

Rachida Labbas, Washington State University, USA

Ranjit Kaur Gurdial Singh, The Kilmore International School, Australia

Sahar Ahadi, Islamic Azad University of Mashhad, Iran

Tuija A. Turunen, University of Lapland, Finland

Vasiliki Brinia, Athens University of Economic and Business, Greece

Zahra Shahsavar, Shiraz University of Medical Sciences, Iran
Revealing Disciplinary Variation in Pakistani Academic Writing: A Multidimensional Analysis
Authors: Azher Musarrat , Faiz Rabia , Izhar Ayesha , Nisa Riffat-un , Ali Samina
Published: February 2019

Pakistani English as a non-native variety exhibits variation at different levels of language. Early quantitative studies on Pakistani English have compared individual linguistic features of Pakistani English with their counterparts in British English and claimed about the distinctive identity of Pakistani English as an indigenous variety. Pakistani English need to be compared at the level of register to further highlight its unique features and strengthen its distinct identity. Based on a special purpose corpus, the present research paper endeavors to investigate linguistic variation across disciplines in Pakistani academic writing as a register. Disciplinary variation is explored along with five new textual dimensions identified and labeled through the technique of Multidimensional analysis (Azher & Mehmood, 2016). The ANOVA results reveal that statistically significant differences are found among disciplines on all the new dimensions of Pakistani Academic Writing. The findings underline the implications for discipline-specific and register-based pedagogies with special reference to Pakistani English.