bluuebunny/crossref_metadata_2025 huggingface dataset:
Project Management Culture
Authors: Kopczynski Tomasz
Published: March 2017

The chapter outlines the importance and influence of organizational culture on contemporary project management in the context of variable and complex environment. The main objective of the study is to show what shapes the culture of project management and how it influences the effectiveness of managing projects in circumstances of the contemporary environment. Individual chapters disclose the essence and importance of organizational culture; besides, attention is brought to factors that form the culture of project management with a specific emphasis on social factors, which play the key role. Based on the results of research carried out in Polish companies, the last part of the chapter presents the influence of organizational culture and forming it factors on effectiveness of project management. It also displays the most important aspects of project management culture that influence the effectiveness of project management in realities of today's environment.
Leadership Behavior Predictor of Employees' Job Satisfaction and Psychological Health
Authors: Lorber Mateja , Treven Sonja , Mumel Damijan
Published: March 2017

Research about relationship between the leadership behavior and the psychological health is still limited. The effect of job dissatisfaction on health is important not only from medical but also from the economic perspective. The association between leadership behavior, job satisfaction and psychological health in nursing was tested. 640 hospital nurses from surgery and internal medicine departments in Slovenian hospitals participated. Data analysis was carried out by using SPSS, 20.0. The transformational leadership style, leaders' characteristics, job satisfaction predicted better psychological health. More frequent exposure to stress and the lack of stress management was associated with poor psychological health. Job satisfaction is at a medium level. The results indicated that 85% of employees in nursing had good psychological health. The psychological health of employees does not affect only on individual, but also on the quality and effectiveness. It is important to monitor employees' job satisfaction and take care for health by providing a healthy work environment.
System and Subsystems Used in the Engineering Approach of Human Evacuation in Case of Fire
Authors: Grigoraş Zeno Cosmin , Diaconu-Şotropa Dan
Published: March 2017

The new approach of human evacuation in case of fire, the engineering one, offers additional possibilities of assessment for this activity included in the issue of fire safety of buildings. Being a relatively new field of study, less known to professionals specialized in fire safety (but quite well known to specialized researchers), fire safety engineering undergoes permanent reorganization at the level of concepts and procedures, information by mean of which it operate, due to the rapid accumulation of experience in this area of engineering activity; therefore, after countries such as Australia, Canada, New Zealand, USA have provided to their specialists normative regulations specific to fire safety engineering, groups of specialists from these countries have joined their efforts to try reducing the differences between these regulations and give a unified, better conceptualized approach to fire safety engineering. The result: the development of International Fire Engineering Guidelines (last edition 2005). The systemic approach to fire safety in buildings outlined, once again, the possibility of modular organization of this field of study, the relations between modules depending on the objectives followed in a fire safety analysis for a specified building. This article intends to present in this modularized perspective, human evacuation in case of fire from a building designed for higher education, with a centrally located atrium.
Considerations on Using the Strut and Tie Method for Modelling Coupling Beams
Authors: Murăraşu Vasile , Venghiac Vasile Mircea
Published: March 2017

This paper presents a synthesis of the numerical analyses regarding the method of modelling the coupling beams of structural walls. The directions of the struts and ties are established according to the results obtained after a linear-elastic finite element analysis. The results obtained after modelling using the Strut and Tie Method, with the struts and ties oriented along the diagonals of the coupling beam, coincide with the results obtained by applying the theory provided by EC8, which proves the viability of the method. This is also confirmed by the results obtained after a non-linear analysis was carried out in the LUSAS finite element environment.
Structural Reliability Solutions of a Ground Floor Building under Limited Interventions Conditions
Authors: Tuns Ioan , Mantulescu Marius , Galatanu Teofil Florin
Published: March 2017

Any building must ensure safety conditions during the exploitation, at the level of designed exigencies, throughout the entire lifespan. The completion degree of the structural performance requirements, in the given exploitation conditions, results following the assessment of the technical state of the building. This paper presents a case study performed on an industrial “ground floor” type building, with the purpose to assess the exploitation safety level for the constituent structural elements and engineered consolidation measures. The structural reliability solutions have been designed in compliance with the execution possibilities limited by the existing of ventilation tubing , of big dimensions , made in France, of ,,polyester reinforced with glass fiber’’, which is situated along columns of axis A, at 30 cm approximate and the owner cannot to interrupt the technological process during the works.
Shear Structural Response of Adhesive Joints for FRP Composites
Authors: Ungureanu Dragoş , Ţăranu Nicolae , Dupir Iuliana , Florenţa Ion , Lupăşteanu Vlad
Published: March 2017

Adhesive bonding is a suitable joining technique for composite materials. The thick adherents shear’ tests (TASTs) are common joint-specimen tests performed to determine the adhesive shear properties. This paper presents the results of numerical modelling of several TAST specimen configurations. The numerical models were conceived considering the adherents made of fiber reinforced polymer (FRP) strips and bonded with an epoxy type adhesive. The adhesive layer thickness has varied as 1 mm, 2 mm and 3 mm, while the overlap length has been increased from 50 mm to 70 mm and 100 mm, respectively. Unidirectional tensile load of 500 N, 1000 N and 2000 N are applied and the stress-strain distributions are investigated. The results are presented in terms of total deformation, equivalent stress (von-Mises) and equivalent strain (von-Mises).
Reinforced Earth Retaining Structures - Failure Surface Shape
Authors: Colț Oana Elena
Published: March 2017

As an alternative to classical retaining solutions, as gravity or flexible retaining walls, the reinforced earth retaining structures are successfully used. The interaction between the reinforcement and the soil fill and their failure mode as well, are important issues to take into account for the design of these types of structures and the corresponding calculation methods used for their design. From this point of view, an important element is the shape of the failure surface, considered in the design calculation as: plane, circular, etc., which has an important influence on the tensile forces values within reinforcements. This paper presents a new theoretical method for the calculations of the reinforced earth retaining structures and the corresponding results for failure surface shape and for tensile forces in the reinforcements. Considering the similarities between the theoretical results presented in this paper and the experimental results presented in the specialty bibliography, this method creates the possibilities to design in a more economical way, only by taking into consideration the correct interaction mechanism between the soil and the reinforcements
A Proposal for Controlling Work Progress on Excavation Projects Using Digital Photographs
Authors: Toledo Mauricio J. , Isamitt Valeria
Published: March 2017

Current practice in excavation projects is characterized by a deficient control of work progress that includes estimates of daily work progress by indirect means such as manual records of truck movements, estimates of soil swelling and occasional topographic measurements (usually at start and end of projects). In this article we propose a procedure to calculate earth work volume and progress by using geotagged digital photographs taken at the construction site. This methodology helps construction managers to improve excavation progress control and it systematizes excavation records. The procedure is grounded on literature review, the experience gained from controlled experiments and its application on a case study. With a relatively low effort (approx. 3 hrs.) the proposal enabled us to measure excavation work progress from around 50 geotagged digital photos with a precision of about 8-10% as compared to the traditional excavation volume estimate obtained from truck movement records. Best results were realized for large earth movements recorded on a weekly basis. Precision decreased for small earth movements (e.g., daily work progress control). The proposal includes recommendations for capturing the digital photos; formation of a point cloud model using photogrammetric software; formation of a mesh model and calculation of the excavation volume. Considerations for obstructing construction equipment and complex geometries are included.
Generating Diagonal Braces Used in Pergola and Pavilion Structures
Authors: Prună Liviu , Slonovschi Andrei
Published: March 2017

The diagonal braces are integrated part from pergolas and pavilions and have both functional and decorative role. These may have different shapes and, simultaneously, may have distinct inner models. In this paper, the authors propose a method, easy to use, even for the non-programmers that gives the opportunity to build templates for different diagonal braces. The using of such templates gives the possibility to the users to give different dimensions, depending on the specific requirements, of a given diagonal brace. Furthermore, the authors presents a way which gives the opportunity to obtain a 3D model starting from such a template.
Study on the Representation of Rotation Quadrics - The Ellipsoid
Authors: Tudoreanu Adrian , Drăgan Delia
Published: March 2017

The ellipsoid is part of the family of rotation quadrics, along with the paraboloid and hyperboloid. This paper presents a study on the representation of the ellipsoid surface using various representation manners from descriptive geometry: the orthogonal projection on two planes of projection (the Monge projection), the axonometric projection and the projection with elevations. Every type of representation is exemplified by drawings.
Efficient Ways of Turning to Account Geothermal Energy for Heating in Energy Efficient Buildings
Authors: Moldovan Raluca Paula , Dragoș Gheorghe Viorel , Verdeș Marina , Ciocan Vasilică , Bălan Marius Costel , Burlacu Andrei
Published: March 2017

Within the present context of the effects of climate changes upon the environment, social and economic framework, but also of the trend of population growth and urban development, ensuring a sustainable, competitive and secure energy development will be possible, primarily, by reducing the negative impact of buildings upon the environment, improving energetic and ecological performances of systems and buildings envelope and promoting renewable sources of energy. In this sense, the paper analyzes, in dynamic simulation regime, performant solutions to reduce the energy consumption for heating energy efficient buildings and greenhouse gas emissions, by harnessing geothermal energy through the use of heat pumps and earth-to-air heat exchangers. The case study starts from an energy efficient building, analyzing the dynamic thermal behavior of the building and then various configurations of earth-to-air heat exchangers in terms of heating potential. For the selection of the optimum solution in terms of coverage of the heating energy demand, different systems combining heat pumps and earth-to-air heat exchangers are studied.
Energy Improvement Study of a Double-Skin Façade in Winter Conditions
Authors: Bratosin Theodor , Iavorschi Eugen , Chereches Cristian , Popa Catalin
Published: March 2017

A numerical study of a natural convection flow coupled with radiation was carried out in a double-skin façade. The solar radiation flux to which the double-skin façade is subjected has been chosen for a cold season month (φ = 66.9 W/m2 ). The double-skin façade is installed on a building whose interior temperature is 293 K given that the temperature at the inlet in winter conditions is 255 K. This study focuses on 5 different widths of the double-skin façade (4, 6, 8, 10 and 12 cm). Three-dimensional numerical simulations have been carried out for a steady and turbulent flow. Transport equations of mass, momentum and energy are solved numerically using finite volume method. Velocity and temperature profiles show the differences between all the above mentioned 5 cases in order to highlight the optimal width of the double-skin façade.
In Situ Performance Assessment of a Bio-Sourced Insulation Material from an Inverse Analysis of Measurements on a Demonstrator Building
Authors: Slaimia Marouen , Belayachi Naima , Hoxha Dashnor
Published: March 2017

The purpose of this study is to evaluate the potential of bio-sourced material based on cereal straw for an efficient insulation. Decreasing significantly energy consumption of buildings requires not only the very best insulation material for heat loss reduction through the wall but also the reduction of air permeability which can affect automatically the comfort in the building. This is why, propose an insulation material with low thermal conductivity remains insufficient and the evaluation of the performance of the new insulation material in situ in real conditions is an essential step. The experimental building ( PROMETHE demonstrator) is set up with wood frame and multilayered walls composed with cinder blocks and insulation bio-composite based on cereal straw in order to simulate the thermal rehabilitation conditions according the External thermal insulation principle. Each façade is divided in four part with three different insulation bio-composites and naked part for comparison reasons. Hygrothermal sensors are used both inside and outside of the demonstrator, and heat-flux sensor is placed at the cinder blocks biocomposite interface. These in situ measurements are used to compare the efficiency of three bi-sourced materials and for the modeling the hygrothermal behavior of the multilayer wall by using the set of identified parameters in laboratory.
Developing an Innovative Urban Traffic Noise Monitoring System
Authors: Beca Ilinca Mirela , Iliescu Mihai
Published: March 2017

The transportation policies focusing on minimizing the environmental impact aim at an improved quality of life and health of the population, the urban one in particular. Noise pollution is one of the biggest problems associated with the European urban environment at the present moment, mainly because of the ever-increasing road traffic.
SUNET system (System for Urban Noise and Eco-Traffic) was designed to improve the management of the noise pollution in Cluj-Napoca and to provide up-to-date public data on a user-friendly interface. The implementation of the application over the entire municipality is highly advantageous as it creates a link between the town’s administration (the local authorities, the City Hall of Cluj-Napoca) and the user (the citizens) through this system which is dynamic, modern and compliant with the European regulations. The graphic interface uses the HTML (HyperText Markup Language) code, while the database is set up in an SQL (Structured Query Language) format and contains information about the characteristics of the system and users alike, all organized in specific tables.
The need for an online urban noise pollution monitoring system, such as the SUNET one, appears to allow the provision of fairly realistic and up-to-date information and encourage the community to actively assist in the application of proper action plans and the decision-making process when it comes to the population’s exposure to high levels of noise pollution.
Integration of Geohazards in Urban Planning and Management
Authors: Poyiadji Eleftheria , Kontogianni Villy , Nikolaou Nikolaos
Published: March 2017

Geological conditions capable of causing damage, or loss of property and life, are called geological hazards and commonly referred to as "geohazards". Geohazards are recognised as a major threat for the society leading the scientific community into introducing various methodologies for susceptibility, hazard and risk assessments.The integration of these assessments into Urban Planning and Management can significantly enlarge society resilience to geohazards. For an effective integration of geohazards into Urban Planning and Management specific actions are needed: common guidelines, legislation for planning policies.Specific methodologies for hazard assessment specially designed for Urban planning with selected case studies are presented together with a description of relevant Greek legislation.
Analysis and Value Engineering Applied in Building Restoration - Proposed Methodology
Authors: Ciocan Ioan , Onutu Catalin
Published: March 2017

The principal route of success in construction is, according to most experts, economic competitiveness, and the main conditions are: the correct management of cost and quality of construction works and services in the competitive market. Analysis Method and Value Engineering allow the development of competitiveness (efficiency) construction firms in a meaningful, durable and this in an economic environment more complex and evolving. The proposed methodology seeks to solve these problems and give a reply in this regard and create the possibility of reducing the price of construction.
Self Compacting Concrete Structures: A Techno-Economic Analysis
Authors: Cazacu Nicolae , Bradu Aurelia , Florea Nicolae
Published: March 2017

The concept of self-compacting concrete (SCC) was performed in late 1980 by Japanese researchers as a solution for the lack of skilled workers and decreasing quality in building industry. The high fluidity of SCC allows flowing under its own weight, filling completely the formwork without any vibration or material segregation, providing a higher quality of the concrete surface. Since its discovery, a large number of researcher studied its rheological properties, adjusted mix design methods and analysed mechanical characteristics. The placement method for conventionally concrete is no more valid for SCC, as mixture behaviour changed substantially. This aspect was less examined and the published material is inconsistent, even though it plays an essential role in the assessment of the global cost of a building. The aim of this study is to investigate materials cost, the labour requirements, formwork demands, methods of placement and construction time for building a structure using SCC and vibrated concrete and compare the results.
Stabilization of Metastable Nano-Size β-Zn2SiO4:Mn Emitting Yellow Luminescence in Silica Glass
Authors: Akai Tomoko , Murakami Masaki , Uchida Takeyuki , Yamashita Masaru
Published: March 2017

We report a simple process of stabilizing metastable β-Zn2SiO4:Mn nanocrystals in amorphous silica. Zn and Mn ions were incorporated in mesoporous silica by immersing aqueous solution of Mn2+ and Zn2+, and the mesoporous silica was sintered at 1000-1100oC in reducing atmosphere. β-Zn2SiO4:Mn were formed along with α-Zn2SiO4:Mn in sintered mesoporous silica when diameter of pore is as small as 2.4nm. Due to the formation of β-Zn2SiO4:Mn, photoluminescence (PL) spectra exhibited both green and yellow emission originated from α-and β-Zn2SiO4:Mn, respectively. Relative intensity of the two emission was changed by changing heat treatment time and temperature. These results imply that this simple process is promising to stabilize nanocrystal of β-Zn2SiO4:Mn emitting yellow luminescence.
Kinetic Modeling of CO2 Gasification Reactivity of Palm Kernel Shell (PSK)
Authors: Lerkkasemsan Nuttapol
Published: March 2017

This research demonstrates the investigation of gasification reactivity behavior of palm kernel shell bio char using thermogravimetric analysis (TGA) at 850, 900 or 950°C under CO2. There are three fluid-solid kinetic models used to describe the reaction behavior of palm kernel shell bio char. The three models are volumetric model (VM), grain model (GM), and random pore model (RPM). From model results, the GM model and RPM model describe the reaction quite well. However, the GM model is considered as the best model in all three models to describe the reactivity of palm kernel shell bio char gasification reaction. From the GM model, the reaction starts from the surface and it moves to the core. As time go on, the gasify agent will defuse through the core and it keep the reaction go into the core. The activation energy of gasification reactivity of palm kernel shell bio char are 150kJ/mol for GM model. From the results, the coefficient of determination of GM model are 0.989, 0.989, and 0.961 at 850, 900, 950°C respectively.
Reusing Rockwool Insulation Waste as Plant Substrate: A Case Study of Flase Heather (Cuphea hyssopifolia Humb.)
Authors: Niyomthongchai Darin , Limphitakphong Nantamol , Chavalparit Orathai
Published: March 2017

Nowadays, petrochemical industry in Thailand has growth tremendously which resulting in an increasing of waste generation. Insulation is one types of petrochemical waste that normally disposed to landfill. In this study, therefore, the utilization of rockwool insulation waste was examined in order to reuse as plant substrates for growing Flase Heather (Cuphea hyssopifolia Humb.). Rockwool insulation waste was simulated as plant substrates by mixing with soil at different ratio, whereas a commercial rockwool was used as a control. During the experiment period of 60 days, nutrients were not added into the plants. Leaching test of rockwool insulation waste before and after the experiment illustrated that such waste could be classified as non-hazardous waste since its heavy metals in leachate before planting were less than the standard announced by Department of Industrial Works in Thailand. On the other hand, the heavy metals concentration in leachate after planting and in the plant were under the standards as well. In addition, an analysis of surviving rate and growing rate demonstrated that an optimal condition of using rockwool insulation waste as plant substrates should be a mixture ratio of rockwool insulation waste and soil of 3:1. To sum up, the reuse of rock wool insulation waste as plant substrate would make a range of benefits on economic, social, and environmental aspects.
Structural, Electrical and Magnetic Properties of Modified Bi1/2Na1/2TiO3 - Modified CFO Based Magnetostrictive (Co0.6Zn0.4Fe1.7Mn0.3O4) Particulate Nanocomposite
Authors: Tyagi Mintu , Kumar Vinod , Kaur Gurpreet , Sharma Puneet
Published: March 2017

Lead free Multiferroic composites that comprise Co0.6Zn0.4Fe1.7Mn0.3O4 (CZFMO) and 72.5(Bi1/2Na1/2TiO3)-22.5(Bi1/2K1/2TiO3)-5(BiMg1/2Ti1/2O3) (BNT-BNT-BMgT) were synthesized using sol-gel method and it’s structural, ferroelectric and magnetic properties were studied. The X-ray diffraction displayed the single phase formation of parent phases and the presence of two phases in the composites. The samples showed a well saturated polarization-electric field hysteresis loops. The remnant polarization and saturation polarization values are decreased with increasing ferrite content. Room temperature (RT) magnetic measurements show that composites are soft magnetic. The composite with x = 0.2, showed the enhanced magnetic and ferroelectric properties. Moreover, these ME composites provide a great opportunity as potential lead free systems for multifuntional device applications.
Effect of Mo Addition to ZA22 Alloy Grain Refined by Ti-B on its Metallurgical and Mechanical Characteristics in the as Cast Condition
Authors: Al-Qawabah Safwan M.A. , Zaid Adnan I.O.
Published: March 2017

Zinc aluminum alloys are getting increasingly in use in industrial and engineering applications especially after the development of zinc alloys with higher aluminum content. These new developed zinc aluminum based alloys have high strength and hardness, improved creep and wear resistances and lower density. However they have the disadvantage of solidifying in dendritic structure with large grain size which adversely affects their mechanical strength, toughness and surface quality. Grain refinement of metals and alloys by rare earth elements has engaged the materials researchers for the last seven decades. In this paper the effect of molybdenum addition diagram to zinc 22 wt. % aluminum, ZA22, alloy grain refined by Ti-B at a rate of 0.1 wt. %, which corresponds to the peretictic point on the Al-Zn phase diagram in the as cast condition was carried out. The effect of the addition on the metallurgical and mechanical characteristics of the alloy were investigated and the obtained results are presented and discussed.
The Effect of Silica Abrasive Particle Sizes in Polyester Based Composite on the Tribological Properties of Ti64
Authors: Minn Myo , Castagne Sylvie
Published: March 2017

Investigation of the tribological characteristics of Ti6Al4V (Ti64) was performed by using a pin-on-disc tribometer. Polymer composites composed of a polyester resin matrix and silica abrasives with two different particle sizes were used as the counterface pin material. The macro and micro surface features on the wear track in relation to different abrasive particle sizes were analyzed by using optical microscope and scanning electron microscope. The wear depth was monitored by utilizing surface profiler and the change in hardness of Ti64 was measured by using Vickers hardness tester before and after the test. The effect of sliding speeds on the coefficient of friction was also studied. During sliding against Ti64 substrate, the results showed lower coefficient of friction, smoother surface features, and lower wear rate for the case of the polymer composite pin with smaller silica particles size when compared to that of polymer composite pin with larger silica particles size. The higher sliding speed generated more wear debris, much deeper wear depth, and wider wear track on Ti64 substrate.
Segment Formation in the Work Pieces of ZA22 Grain Refined by Some Rare Earth Elements and Subjected to Equal Channel Angular Pressing, ECAP, Process
Authors: Zaid Adnan I.O.
Published: March 2017

Zinc aluminum alloys in general and ZA22 in particular are versatile materials which are widely used in the automobile, aircraft and space craft industries due to their required and attractive properties e.g. high strength-to weight-ratio, good cast ability, high wear and corrosion resistances, in addition to the advantages of low–energy and non-polluting melting. . However, against these attractive properties they have the disadvantage of forming a dendritic structure with large grain size during solidification or homogenization of their casts, which tends to reduce their surface quality, mechanical and impact strengths. Hence it is very essential to modify their structure and refine their grains. In this paper, the effect of the ECAP process on ZA22 alloy after grain refinement of its structure by titanium, titanium plus boron and molybdenum on its metallurgical and mechanical characteristics is investigated. During the investigation, a new phenomenon had occurred on the upper surface of the work pieces, (the surface in contact with the upper part of the ECAP die) similar to the serrated chip type which was first observed by Merchant in1948, This formed the main objective of this paper, in which the causes of this new phenomenon, the mechanism of its formation and how to avoid its occurrence are presented and discussed.
Formation of Composite Surface Layers TiNiTa + cBN-Co-NiAl-Y Considering their Properties
Authors: Rusinov Peter Olegovich , Blednova Zhesfina
Published: March 2017

We developed formation technology of composition "steel - material with shape memory effect - high-temperature ceramic wear layer" by means of high-velocity oxygen-fuel spraying in the protective environment of mechanically activated powders TiNiTa and cBN-Co-NiAl-Y. We determined optimal processing parameters. We revealed regularities in the formation of nanosized state composition on the basis of the complex X-ray diffraction and electron microscopy studies. We carried out tests om steel 1045 with a surface-modified layer TiNiTa + cBN-Co-NiAl-Y in high-cycle fatigue, which confirmed the increase in endurance limit.
Non-Linear Modeling of the Dynamic Response of Single-Wall Carbon Nanotube SWNT Composites to NO2 Gas in Air
Authors: Abdulhay Enas , Abdelhay Arwa , Albiss Borhan Aldeen , Oweis Rami
Published: March 2017

The objective of this study is to develop a mathematical model, which can describe the response of a single-wall carbon nanotube (SWNT) as a resistive NO2 sensor, based on the acquired experimental data. The obtained non-linear regression attempts to simulate and predict the sensor response taking into account the effect of different variables such as NO2 concentration and operating temperature. The results show that the developed mathematical equation expresses the sensor response as a function of time, gas concentration, and temperature with an R-squared value ranging between 0.65 and 0.97.
Fractograpic Observations and Effect of Stress Ratio on Fatigue Striations Spacing in Aluminium Alloy 2024 T351
Authors: Benachour Mustapha , Benachour Nadjia , Benguediab Mohamed
Published: March 2017

In this paper, effect of stress ratio was investigated on macro and micro of fatigue crack growth rates (FCGRs) of Al-alloy 2024 T351. Microscopic fatigue crack growth rate present a change of slope with respect to the macroscopic fatigue crack growth rate. In addition, an increasing in stress ratio increases the fatigue life. Fractographic examination showed the presence of striations in Paris domain and secondary cracks at grain boundaries.
Investigation of Curing Silver Conductive Inks on Fabrics Using DLP Projector and Hot Plate
Authors: Khirotdin Radin Khairilhijra , Hassan Nurhafizzah , Yusof Umiera Asyikin , Mahadzir Muhammad Adzeem
Published: March 2017

This study is to investigate the curing of silver conductive ink tracks on fabrics using a combination of direct light projector (DLP) and hot plate since conventional curing process using laser and oven suffer from several weaknesses mainly costly process and warping defect. The fabrics used are made from nylon and polyester while silver conductive inks were used for the entire study. Samples were made by coating the fabrics with rubber dye inks using silkscreen process and conductive inks were manually laid out on top of the rubber dye according to the designated pattern. A Microsoft power point slide is used to shape the light image on top of the hot plate where the sample is located. Variation of curing time and temperature with constant curing distance were investigated. Several mechanical and electrical tests were conducted to determine the cure, hardness, adhesion and resistance level of the ink tracks. The results obtained were as expected which the longer curing time taken and a higher temperature used, a lower resistance is produced. It is proven that a combination of projector and hot plate is capable of curing the ink tracks properly, a cheap process and easy to handle.
FEM and Contour Method Study of Quenching Residual Stress of 7050 Aluminum Alloy Cross-Shaped Component
Authors: Li Yang , Wu Yun Xin , Gong Hai , Xiao Feng
Published: March 2017

In order to study the quenching residual stress of typical aluminum alloy component used in aerospace, the finite element (FE) model of quenching process of 7050 aluminum alloy cross-shaped component was established based on heat transfer theory and elastic-plastic mechanics theory, the distribution regularities of quenching residual stress field of cross-shaped component was analyzed. The results indicate that the residual stress distribution of web of cross-shaped component is similar to the residual stress distribution of thick plate, the large tensile stress concentration is exist in web plate and the connection part of the stiffener with a certain influence area. The error data of the component contour deformation were processed and the component deformation contour was fitted, which makes the test result of the contour method and FE simulation result have good consistency. The results of the study provides guidance for quenching residual stress reduction of aviation aluminum alloy components and provides the basis for calculating of machining deformation of monolithic component.
Synthesis of Catechin-Gelatin Nanofiber by Electrospinning
Authors: Nasir Muhamad , Apriani Dita
Published: March 2017

Catechin and gelatin are important natural products for food, medical, pharmaceutical and cosmetic industry. We have successfully synthesized catechin-gelatin nanofiber by electrospinning process. Catechin-gelatin nanofiber was synthesized by using gelatin from yellow fin skin tuna fish as biopolymer, polyethylene oxide (PEO) as spinnability improver polymer, acetic acid as solvent and catechin as bioactive component, respectively. Morphology and structure of bioactive catechin-gelatin nanofiber were characterized by scanning electron microscopy (SEM) and fourier transform infrared spectroscopy (FTIR), respectively. SEM analysis showed that morphology of nanofiber was very smooth without bead on nanofiber string. The average of catechin-gelatin nanofiber diameter was 389 nm. FTIR analysis results were used to confirm structure of catechin-gelatin nanofiber. Catechin-gelatin nanofiber has vibration band peak of amide A (N-H) at 3289,043 cm-1 and amide B (N-H) 3062,310 cm-1, amide I (C=O) at 1643,812 cm-1, amide II (N-H and CN) at 1538,949 cm-1, amide III (C-N) at 1237,11 cm-1 from gelatin, C-O-C from PEO at 1143,583 cm-1, and vibration band peak OH at 3200-3600 cm-1, and at C-O ether around 1300-1100 from catechin, respectively. FTIR spectra showed us that there is no change in chemical structure of gelatin and catechin in nanofiber which was produced by electrospinning process. Catechin-gelatin nanofiber can inhibit S. Aureus bacteria around 43.38%
Cortrak-Assisted Feeding Tube Insertion: A Comprehensive Review of Adverse Events in the MAUDE Database
Authors: Bourgault Annette M. , Aguirre Lillian , Ibrahim Joseph
Published: March 2017

Background

Electromagnetic devices to guide feeding tube placement such as the CORTRAK Enteral Access System have shown promising results; however, researchers in recent studies have expressed concern that a higher level of user expertise may be required for safe use.

Objectives

To review adverse events related to CORTRAK-assisted feeding tube insertion reported in the Food and Drug Administration’s Manufacturer and User Facility Device Experience (MAUDE) database.

Methods

A retrospective, secondary analysis of the MAUDE database was performed to evaluate adverse events (ie, injury or death of patient) related to CORTRAK.

Results

Fifty-four adverse events between January 1, 2006 and February 29, 2016 were identified and reviewed. Most events (98%) involved feeding tube placement in the lungs (37%, left lung; 46%, right lung; 15%, not specified). Lung complications included pneumothorax (77%) and pneumonitis (21%). Death occurred in 17% of lung placements. Clinicians failed to recognize placement in 89% of CORTRAK insertion tracings reviewed.

Conclusions

Lung placement is not unique to CORTRAK and is an inherent risk of all feeding tube insertions. In known or suspected lung placement, feeding tubes should be removed and radiography performed to assess for pneumothorax. Clinicians must observe closely for lung placement and discriminate lung from gastric placement on insertion tracings. Clinicians require specialized training and experience to develop competency in using the CORTRAK device, although the exact amount of experience needed is unknown.
Report of 2016 bedrock activities for the geologic and metallogenic framework of the south Rae Craton, southeast NWT: GEM 2 South Rae Quaternary and Bedrock Project
Authors: Percival J A , Martel E , Pehrsson S J , Acosta-Góngora P , Regis D , Thiessen E , Jamieson D , Neil B , Knox B
Published: March 2017

Foreword
The Geo-mapping for Energy and Minerals (GEM) program is laying the foundation for sustainable economic development in the North. The Program provides modern public geoscience that will set the stage for long-term decision making related to investment in responsible resource development. Geoscience
knowledge produced by GEM supports evidence-based exploration for new energy and mineral resources and enables northern communities to make informed decisions about their land, economy and society. Building upon the success of its first five-years, GEM has been renewed until 2020 to continue
producing new, publically available, regional-scale geoscience knowledge in Canada's North.
During the summer 2016, GEM program has successfully carried out 17 research activities that include geological, geochemical and geophysical surveying. These activities have been undertaken in collaboration with provincial and territorial governments, northerners and their institutions, academia and
the private sector. GEM will continue to work with these key collaborators as the program advances.
Regional centroid moment tensor solutions for eastern Canadian earthquakes: 2015
Authors: Bent A L
Published: March 2017

Regional centroid moment tensor solutions have been determined for seven moderate-sized earthquakes in eastern Canada during 2015. The moment tensor inversion method is used to determine the focal mechanism, depth and seismic moment of the earthquakes. These
parameters, in turn, provide information about the seismotectonic environment in which the earthquakes occur and may help improve seismic hazard estimates. The purpose of this report is not to provide an in-depth analysis of any specific earthquake but to catalog the solutions and data used to
obtain them to make them available for future research projects.
Public lies, private looting and the forced closure of Grootvlei Gold Mine, South Africa
Authors: McKay Tracey J.M. , Milaras Milton
Published: March 2017

Mine closure and acid mine drainage (AMD) are major interrelated challenges facing South Africa’s Witwatersrand gold mines. As a result of mining, the East, West and Central Rand compartments of the Witwatersrand Basin are interconnected, making AMD a regional problem. Consequently, the South African National Department of Mineral Resources recommends regional mine closure strategies. Unfortunately, the mismanagement of Grootvlei Gold Mine and its AMD problem resulted in premature and unplanned closure of the mine; massive job losses; pollution of a river and its Ramsar wetland site, as well as a significant setback for regional mine closure. Although directors were held civilly liable for damages to the mine, to date no one has been held liable for the water pollution, creating an impression that environmental laws can be flouted with impunity.
Geography versus institutions and sub-Saharan aid
Authors: Callaghan Chris W.
Published: March 2017

This article sets out to review two opposing viewpoints in the literature, namely long-standing geographic versus institutionalist perspectives and their opposing predictions for development of poor countries, particularly those in sub-Saharan Africa. A special focus is on the differing predictions of the effectiveness of aid of these two perspectives. On the basis of a consideration of different literatures and final Millenium Development Report, it is argued that ‘Big Push’ theory may still offer important theoretical and practical development contributions. Arguably, these contributions echo Keynes’s legacy in their consideration of the most vulnerable and marginalised. It is also argued that a global birth lottery allocates people to countries and regions with unequal opportunities and that a normative argument can be made to justify aid to mitigate birth lottery effects.
Gamifying elderly care: Feasibility of a digital gaming solution for active aging
Authors: Ascolese Antonio , Kiat Jin , Pannese Lucia , Morganti Luca
Published: March 2017

ABSTRACT

Background and Objectives:

Aging society is a social health issue that digital gaming solutions can address by enabling both infrastructures as advanced environments for care and patients as active people in their aging. Cost-effective patient management may be emphasized thanks to the communication protocols that allow remote monitoring and intervention by medical professionals. Services for elderly depend on their behavior and lifestyle toward personal health management. Digital games could increase seniors' engagement and motivation. However, a few studies have looked at the acceptance of digital games by the elderly. The study here presented aims to evaluate the feasibility of a gaming rehabilitation platform.

Materials and Methods:

In Singapore, fifty elderly practiced 30-min sessions and evaluated their experience with a new tool based on game scenarios for rehabilitation.

Results:

Results are discussed in the light of Davis' Technology Acceptance Model, highlighting mainly a good perceived usefulness of the service.

Conclusions:

This preliminary study is encouraging the spread of digital medical games for old patients.
Некоторые свойства связных орто-выпуклых множеств на плоскости
Authors: Dulliev Aidar Mansurovich
Published: March 2017

В настоящей работе исследованы топологические
свойства связных орто-выпуклых множеств на плоскости,
т.е. связных множеств, выпуклых вдоль горизонтальной
и вертикальной прямых. Приведены и доказаны геометрические
формулировки нескольких утверждений об орто-отделимости
орто-выпуклых множеств.
Библиография: 8 названий.
Линейно упорядоченные теории, близкие к счетно категоричным
Authors: Kulpeshov Beibut Shaiykovich , Sudoplatov Sergey Vladimirovich
Published: March 2017

Исследуются понятия почти $\omega$-категоричности и
1-локальной $\omega$-категоричности. В частности,
найдены необходимые и достаточные условия их эквивалентности при
дополнительных предположениях. Доказана теорема, устанавливающая
эренфойхтовость 1-локальной $\omega$-категоричной теории на
плотных линейных порядках. Установлена почти
$\omega$-категоричность эренфойхтовых вполне о-минимальных
теорий, являющихся бинарными.
Библиография: 17 названий.
Аналоги задачи Глобевника на римановых двухточечно-однородных пространствах
Authors: Volchkov Valerii Vladimirovich , Volchkov Vitalii Vladimirovich
Published: March 2017

Рассматривается задача об описании множества непрерывных
функций на двухточечно-однородном пространстве $X$,
имеющих нулевые интегралы по всем сферам, охватывающим
данный шар. Получено решение этой задачи и ее обобщений для
кольцевых областей в $X$. В качестве приложений доказаны
новые теоремы единственности для функций с нулевыми
сферическими средними.
Библиография: 17 названий.
Сходимость лучевых последовательностей аппроксимаций Фробениуса-Паде
Authors: Aptekarev Alexander Ivanovich , Bogolyubskii Aleksei Igorevich , Yattselev Maxim
Published: March 2017

Пусть $\widehat\sigma$ - преобразование Коши комплекснозначной борелевской меры $\sigma$ и $\{p_n\}$ - система ортонормированных по мере $\mu$, $\operatorname{supp}(\mu)\cap\operatorname{supp}(\sigma)=\varnothing$, многочленов. Аппроксимацией Фробениуса-Паде с индексом $(m,n)$ функции $\widehat\sigma$ называют рациональную функцию $P/Q$, $\deg(P)\leq m$, $\deg(Q)\leq n$, такую, что первые $m+n+1$ коэффициентов разложения Фурье по многочленам $p_n$ функции остатка $Q\widehat\sigma-P$ обращаются в нуль. Мы исследуем сходимость аппроксимаций Фробениуса-Паде к $\widehat\sigma$ вдоль лучевых последовательностей $n/(n+m+1)\to c>0$, $n-1\leq m$. Носители мер $\mu$ и $\sigma$ принадлежат отрезкам действительной оси, а соответствующие этим мерам тригонометрические веса являются голоморфными, не обращающимися в нуль на отрезках, функциями.
Библиография: 30 названий.
Симметричные проблемы моментов и гипотеза Валента
Authors: Berg Christian , Szwarc Ryszard
Published: March 2017

B 1998 г. Г. Валент сформулировал ряд гипотез относительно порядка и типа некоторых неопределенных проблем моментов Стилтьеса, связанных с процессами гибели и размножения с полиномиальными коэффициентами размножения и гибели степени $p\geqslant 3$. Недавно Р. Романов доказал гипотезу Валента для порядков, установив, что порядок таких проблем равен $1/p$. Мы показываем, что тип проблемы как функция порядка связан с некоторыми кратными дзета-значениями и лежит в интервале $$ [\frac{\pi}{p\sin(\pi/p)}, \frac{\pi}{p\sin(\pi/p)\cos(\pi/p)}], $$ который содержит гипотетическое значение, предложенное Валентом. Это показывает, что гипотеза Валента для типа асимптотически верна при $p\to\infty$. Основной идеей работы является получение оценок для порядка и типа симметричных неопределенных проблем моментов Гамбургера в случае, когда ортонормированные многочлены $P_n$ и многочлены второго рода $Q_n$ удовлетворяют условиям $P_{2n}^2(0)\sim c_1n^{-1/\beta }$ и $Q_{2n-1}^2(0)\sim c_2 n^{-1/\alpha }$, где $0<\alpha ,\beta <1$ могут быть различны, а $c_1,c_2$ - положительные константы. В этом случае порядок проблемы моментов оценивается сверху средним гармоническим чисел $\alpha$, $\beta $. Здесь и далее запись $\alpha_n\sim \beta_n$ означает, что $\alpha_n/\beta_n\to 1$. Попутно мы получаем новое доказательство теоремы Р. Романова о порядке, равном $1/p$.
Библиография: 19 названий.
Голоморфные отображения единичного круга в себя с двумя неподвижными точками
Authors: Goryainov Victor Vladimirovich
Published: March 2017

Изучаются голоморфные отображения единичного круга в себя с двумя неподвижными точками. При этом выделяют два случая: когда одна из неподвижных точек лежит внутри круга, а вторая на границе, и когда обе неподвижные точки попадают на границу круга. Изучено влияние угловых производных в граничных неподвижных точках на свойства функций внутри единичного круга. Выделены условия на угловые производные, при которых внутри единичного круга возникают области однолистности. Изучено также влияние угловых производных на значения тейлоровских коэффициентов функций.
Библиография: 19 названий.
Minimum Performance Criteria for Braking Systems for Specialized Rubber- Tired, Self-Propelled Underground Mining Machines
Authors:   OPTC2, Braking
Published: March 2017

This document applies to self-propelled, rubber-tired specialized mining machines, identified in SAE J1116, with a maximum travel speed of 32 km/h and limited to underground applications. Service braking, secondary braking, and parking brake systems are included.
SAE Passenger Compartment Air Filter Test Code--Test Method for Gas Removing Filters
Authors:   Air Cleaner Test Code Standards Committee
Published: March 2017

This laboratory test method applies to air filters that improve air quality by reducing concentrations of gaseous, odorous, or hazardous components from ambient and/or re-circulated air in vehicle cabins. The test method provides information on pressure drop, as well as gas and/or vapor removal characteristics.

The purpose of the test method is to describe and establish test criteria to enable comparisons of filters and filter components that remove or reduce the levels of containment gases or vapors from air streams under specified laboratory conditions.
Hose Assemblies, Rubber, Hydraulic, Steel Wire Reinforced -- Part 2: Ordering Information
Authors:   Hydraulic Hose and Hose Fittings Committee
Published: March 2017

This SAE Standard covers ordering information for steel wire reinforced rubber hose assemblies using connectors specified in SAE J516 for use in hydraulic systems using petroleum based hydraulic fluids with maximum working pressures of 1.7 to 42 MPa. See SAE J1754-2, Table 8 for hose operating temperature ranges and identification codes.

Note: Working pressure is defined as maximum system pressure.