bluuebunny/crossref_metadata_2025 huggingface dataset:
Fire resistance evaluation of reinforced concrete floors with fire-retardant coating by calculation and experimental method
Authors: Kovalov Andrii , Otrosh Yurii , Ostroverkh Olha , Hrushovinchuk Oleksandr , Savchenko Oleksandr
Published: October 2018

With the help of a previously developed technique based on the solution of inverse and direct problems of heat conductivity, the fire resistance of a hollow-core reinforced concrete floor with “Neosprei” fire-retardant plaster coating was estimated. The thermal and physical characteristics, as well as characteristics of the fire-proof ability of “Neosprei” fire-retardant plaster coating, have been determined. The conclusion has been made on the effectiveness of this coating and on the boundaries of the fire-retardant coatings use to ensure the normed values of the fire resistance degree of hollow-core reinforced concrete floors, including in the mining industry.
Investigation of the influence of polyelectrolytes hydrodynamic properties on the hydrateformation process
Authors: Bondarenko Volodymyr , Svietkina Olena , Sai Kateryna , Klymenko Vasyl
Published: October 2018

One of the most perspective non-traditional sources of hydrocarbon raw materials and energy is gas hydrates (GH), which stimulates their large-scale study in many laboratories and scientific centers around the world. The interest in the GH is related to the possibility of their industrial application. The use of technologies for storage and transportation of natural gas in the form of GH requires fundamental kinetic studies of the hydration process at atmospheric pressure in the presence of chemical impurities (catalysts, surfactants, etc.). During the research, an increase in the rate of gas hydrates formation was discovered at the expense of activated impurities and composite compounds obtained on their basis, which lead to changes in the hydrochemical and hydrodynamical modes of systems. It was established that the process of GH formation occurs due to the binding of methane macromolecules and other chemical impurities, which contribute to increase the number of moles of gaseous methane, due to the flow of exchange processes between the polymer matrix and water soluble salts, as well as a result of the change in the hydrodynamics of the water system. The purpose of this work is to investigate the effect of polyelectrolytes solutions hydrodynamic properties on the GH formation. We used a number of ionenes based on polymeric quaternary ammonium salts, side aliphatic radicals of different lengths contained in the acyl fragment.
Productive flows control in coal mines under the condition of diversification of production
Authors: Mamaikin Oleksandr , Sotskov Vadym , Demchenko Yurii , Prykhorchuk Oleksandr
Published: October 2018

The objective of the work consists in methodical bases of concept development for control by productive flows in coal mines with the use of cost-effective mechanisms. These mechanisms would provide their stable functioning in conditions of uncertainty and risks, formed by internal and external factors. The theoretic views have been used for the supply system structuring, when assessing the opportunities and reasonability to contract out the diversified production operations. The correlation of industrial factors has been defined, representing the mine as a multi-level system, and a logical interpretation of the obtained dependences. The system of efficiency evaluation has been proposed, which is intended to supplement the existing system of risk management with a kind of control element, an indicator of the positive processes in processing technogenic wastes of mines and dressing plants.
Explosive wave propagation in the presence of antiseismic protective curtain
Authors: Kravets Viktor , Remez Nataliia , Kovtun Andrii , Shukiurov Azer
Published: October 2018

The objective of this work is to study theoretically the stress wave formation in the borehole-to-borehole space and on the boundary with the borehole contour set by creating a directed fracture system in it. The features of an interaction of the weak stress wave at a large-scale blasting in the short-delay blast mode (SDB) with the massif and the protective contour set of boreholes, are considered. It is noted the effect of the contour set parameters on wave processes. The constructive solutions are proposed in order to reduce the dynamic loadings in the peripheral rock massif. The proposals consist in applying a combined construction of garland charges to form the seismo protective structure that consists of a contour fracture and one-sided disrupted zone within the boundaries of the blasted block.
Dependence of gas emission from the sources undermined by stope mine workings on the rocks displacement parameters
Authors: Filatiev Mykhailo , Filatieva Elvira , Antoshchenko Mykola
Published: October 2018

The parameters are established in the work of the stope mine workings and rocks displacement, which correspond to the maxima of gas emission into the gas drainage boreholes. The angular and linear parameters of the crustal movement and rocks displacement have been calculated with the use of empirical dependences. These parameters correspond to the maxima of gas emission into the gas drainage boreholes. The obtained positive results for determining the possible areas of maximum gas emission allow us to recommend the empirical dependences for calculating the angles of maximum subsidence and complete displacements at the stage of stope works development, as well as the dimensions of the stope mine workings, at which the processes of rocks displacement reach the earth surface. The established relations between the gas drainage boreholes location and the rocks displacement zones with discontinuity make it possible to design the optimal schemes of draining-out of gases from the gas-and-coal deposits. For the first time, three independent methods have been used to determine the changes in dimensions of rocks displacement zones with discontinuity after the primary main roof squeezing until the formation of stable upper boundaries of these zones.
Mathematical modeling of tight roof periodical falling
Authors: Prykhodko Vira , Ulanova Nataliia , Haidai Oleksandr , Klymenko Dina
Published: October 2018

The paper proposes a method to determine of a coal seam roof falling step basing upon the analysis of stress and strain state of the rock mass area with mine workings formed as a result of coal preparatory and extraction operations. A boundary element method has been applied to define stress and strain state (SSS). Fissuring of enclosing rocks was modeled by means of transversal-isotropic medium. Dependence of destructed rocks zone height within the roof of a seam being mined upon the weakening of the rock mass due to its fissuring and mine working geometry has been determined. Effect of fissility on the periodical roof falling step has been studied. Changes in support loads in the process of stope advance have been determined. A scheme of partial backfilling of the worked out area has been proposed to maintain the support in its working order.
Hereditary model of loose mined rock layer deformation in disintegrators
Authors: Nadutyi Volodymyr , Tytov Oleksandr , Cheberiachko Ivan
Published: October 2018

The objective of this work is to substantiate the hereditary character of the stresses and deformations accumulation in loose mined rock during the disintegrators working surfaces convergence. It is shown, in particular, that the layer porosity after compression and the side thrust coefficient depend not only on the applied pressure, but also on the initial porosity. It is substantiated the mechanism of interrelation between the stresses and deformations of a layer. The experimental researches on fine– grained granite compression in a rigid matrix have been fulfilled. The approximation of obtained results by polynomial functions has been carried out. The coefficients have been determined by the least-square method. The close agreement of the analytical and the experimental values has been recorded. The initial porosity parameter was put into the equation of dependences of the current porosity and the side thrust coefficient on pressure. The mechanism of the forces distribution on separate particles contacts has been explained in terms of the material compacting hystory. The practical value of the research is in calculating the disintegrators operating parts parameters with account of the mined rock layer condition prior to the act of crushing.
Substantiating operational parameters of loadhaul-dumpers in the context of irregular-shaped underground mine workings
Authors: Shyrin Leonid , Iniutkin Ivan
Published: October 2018

Objective of the paper is to substantiate scientifically parameters and design of energy-efficient transportation and operational schedules for ore masses transfer by means of new-generation load-haul-dumpers (LHDs) adapted to real mining environment at different development stages. Features concerning formation of cargo traffics and components of mining as well as tunneling systems in the context of uranium deposits mining have been studied. Mathematical model to identify operational indices of load-haul-dumpers has been developed. Layout features of the spaced pin-connected frame construction have been used to develop mathematical models of disturbed motion. Potential sources to improve the efficiency of load-haul-dumpers in the context of mining intensification have been analyzed.
Technological aspects of technogenic disturbance liquidation in the areas of coal-gas deposits development
Authors: Medianyk Volodymyr , Cherniaiev Oleksii
Published: October 2018

The objective of this work is to develop the technological measures for liquidation of technogenic disturbances that have arisen within the residential areas. Based on the results of geophysical studies, the causes and factors of Earth’s surface caving occurrence that arose in the result of natural-technogenic processes activation in underworked massif and are caused by the soil subsidence under buildings and constructions, have been determined. The solution of the problem was carried out with the use of methods for observing the natural pulsed electromagnetic field of the Earth and electric tomography in the area adjacent to the place of caving. The conclusions about the possible causes of the caving trough formation and its further development have been formulated, as well as the technological scheme for its liquidation have been developed. The developed new technological scheme allows conducting the effective liquidation works in conditions of proximity to the residential buildings and maximally reduces these scopes of works at ecological and protective measures.
Recommended and experimental values of the earth surface shift troughs parameters when conducting the stope works
Authors: Filatiev Mykhailo , Filatieva Elvira
Published: October 2018

The correspondence of angular and linear parameters of the undermined rocks displacement and the crustal movement to their values determined according to the normative document has been established. Based on the surveying observations over the reference points movement on the earth surface and the stope face advance, the empirical curve of the trajectory of the earth surface maximum subsidence is determined from the points of maximum subsidence. The curve of the maximum subsidence of the earth surface points when removing the stope face from the face entry has been experimentally established, which allowed to determine the location of the point of the beginning of the crustal movement and the dimension of the stope mine working corresponding to this situation. The coordinates of the characteristic points of the earth surface subsidence above the stope face have been determined. A unified method has been developed for determining the angular and linear parameters of the undermined rocks displacement for the two stages of shift troughs formation on the earth surface. The nonconformities have been established between the recommended parameters and the experimental data normative documents during the anthracite seams mining.
A Discussion of Magnetoelectric Composite Design by Bonding the Ferromagnetic Material Graded Layers in Induction Motor
Authors: Anthony Zuriman , Abral Hairul , Nazir Refdinal
Published: October 2018

Induction motors are the most electric motors widely used in the community, both in the industrial and in the household applications. The power and efficiency of the motors are determined by the type of ferromagnetic material used in the core of the motor. If a very good ferromagnetic material with high permeability is applied to the core of the induction motor, then both the energy conversion and the efficiency of the motor will increase. But, if the ferromagnetic material is not good with low permeability is used in the induction motor, of course, the conversion of energy generated by the motor will be low so that the motor efficiency becomes decreased. In other cases, when ferromagnetic materials with high permeability are used, these ferromagnetic materials will become more fragile than using ferromagnetic materials with lower permeability. Therefore, a good strategy is needed in designing the core material of the induction motor. This study was intended to provide an overview of the potential use of a composite material of Fe and ferromagnetic material that was made in the Graded Magnetostrictive Layers. This research was conducted using several studies of the results of research on the composite material of the magnet. The results of the study show that a composite material of Fe and ferromagnetic materials provided a great potential in applying to induction motors to increase power and efficiency of the motor.
Optimization of compaction pressure on brick
Authors: Indra Ade , Edison Edison , Nofrianto Hendri
Published: October 2018

Bricks are one of the building materials that serves as a wall or anchoring the load. Therefore, it must be made according to the standards. In our previous observations, many found bricks were traditionally not quality, because the process of making bricks that are not right. Bricks are a class of ceramic materials that must be hard and should not be crushed when immersed in water. The method in this study focuses on optimizing compaction pressures, with printed pressures that are varied in MPa units. The results obtained as follows, in terms of mechanical properties of Compressive Strength increases with the addition of compaction pressure, an increase of 36% (brick becomes strong). In terms of physical properties of Density increased (porosity becomes smaller). For Suction rate down, this shows less water absorption. The results obtained in accordance with national and international quality standards.
Procurement management/ material supply on construction projects
Authors: Tanubrata Maksum , Gunawan Ika
Published: October 2018

Material inventory management is one part of the logistics system devoted to project implementation on material procurement as per the needs plan procurement management is a very important material function, since the material inventory for a construction project involves a considerable investment cost. In general, every construction project involves complex activities, which involves the sharing of activities and operations. Material acquisition activities require good planning and control considering the large percentage of material costs to the total cost of the project. So if less effective material handling will result in loss of time, cost and quality. then this should receive high attention from contractors for the smooth and performance to be achieved in the implementation of construction projects.
An evaluation of mechanical properties of clay brick for masonry wall in Indonesia
Authors: Ridwan Muhammad , Kurniawan Ruddy , Agus
Published: October 2018

In principle, the main construction of the non-engineered building in Indonesia is the wooden structure. It can be seen from traditional houses in Indonesia. However, In the last two centuries, the use of brick masonry as wall component has been becoming the primary material. Another side, some places in Indonesia are the seismic areas and earthquake-prone areas. Learning from the earthquake that has happened in the last ten years, the building that used clay brick for masonry wall mostly suffered damage and destruction when subjected to a relatively high intensity of the earthquake. This paper used data from several places and some references. There have significant differences in the mechanical properties of the bricks. Generally, Indonesian bricks masonry have limited capability and substantial differences in the mechanical properties when compared to another country bricks. By the considering, the Indonesian bricks masonry that has low mechanical properties, so that it is proposed to use brick masonry to non-seismic only. It should be considered to use clay brick as the main component of the wall for a particular region in Indonesia. Next, the zoning of allowed masonry structure in Indonesia is proposed.
Internal factors that affect SMEs to export: A case study of Footwear Cluster
Authors: Dhewanto Wawan , Herliana Sri , Lantu Donald Crestofel , Lawiyah Nur
Published: October 2018

Cibaduyut is one of the footwear clusters that have a high potential in terms of export. The development of globalization creates new pressures and opportunities in competition for SMEs nationally and internationally; the internal factors, playing an important role for SMEs to export. The purpose of this study is to determine what internal factors affect the decision of SMEs in the cluster to export, how, and what the future recommendations to develop export activities in Cibaduyut cluster. The research method used in this research is by using a quantitative method to 10 respondents that have export experience by using frequency data approach. From the frequency data studied, 10 internal factors that include, strong business capital, skilled workforce, good product made, strategic location, intensive marketing, adequate machine tools, adequate warehouse, attractive packaging, foreign language skills, and availability of raw materials, studied to 10 respondents by using the data frequency approach of the development hypothesis, indicates that only the language factor is rejected in the hypothesis testing.
On fixed gain recursive estimators with discontinuity in the parameters
Authors: Chau Huy N. , Kumar Chaman , Rásonyi Miklós , Sabanis Sotirios
Published: October 2018

In this paper, we estimate the expected tracking error of a fixed gain stochastic approximation scheme. The underlying process is not assumed Markovian, a mixing condition is required instead. Furthermore, the updating function may be discontinuous in the parameter.
La transmission explicite des connaissances ordinaires des enseignants expérimentés comme ressource de la formation continue
Authors: Talerien Stéphane , Bertone Stefano
Published: October 2018

Cette étude de cas s’inscrit dans un programme de recherche sur la formation professionnelle dont les principaux postulats théoriques sont empruntés à une théorie générale de l’apprentissage (Nelson, 2008) et de l’action collective (Wittgenstein, 2004). Ce travail de recherche propose une méthode permettant d’accéder aux connaissances ordinaires des enseignants expérimentés en vue de leur transmission dans le cadre d’un dispositif de formation. L’étude montre que l’enseignement ostensif de ces connaissances ordinaires et l’accompagnement de leur mobilisation en situation de travail permet d’améliorer l’efficacité des apprentissages informels et d’optimiser le développement professionnel.
A situated analysis of instructions in paraclimbing training with visually impaired athletes
Authors: Simone Monica
Published: October 2018

Indoor sport climbing performed by athletes with visual impairment is realized by trainer and climber working as a couple and is routinely based on instructions. It can be considered a perspicuous setting (Garfinkel, 2002) for investigating how sighted and visually impaired participants coordinate their perception and actions in the material environment while accomplishing mobile tasks. Drawing on previous ethnomethodological and CA studies on instructions in mobile activities, the analysis of an excerpt of a guided climbing session provides the ground for a detailed description of some features of instructions that are specific to this context. The analysis aims at showing that the trainer’s instructions are not only timely adjusted to the course of action, but, importantly, that they also display the trainer’s orientation to the climber’s sensory impairment.
Addressing inequality in Malaysia through corporate social intrapreneurship
Authors: Che Yusoff Asrif Omar
Published: October 2018

Inequality has been a long standing issue in Malaysia, although the situation has been statistically improving over the past 40 years. From a Gini coefficient of 0.51 in 1970, the government has done considerably well to bring the figure down to 0.39 in 2016. Efforts toward improving the situation are aplenty, but there is room for improvement in terms of the coordination and collaboration of initiatives that are carried out within the public, private, and social sectors. This paper explores the idea of corporate social intrapreneurship as a potential vehicle to mitigate inequality in the country for the long term. Through the analysis of existing literatures and data on the subject, the aim is to first of all, provide a historical and global context on how the roles of corporation have evolved over the years, discuss the transformative views on social intrapreneurship against traditional corporate social responsibility, and offer considerations to further corporate social intrapreneurship initiatives through public-private partnerships in Malaysia.
The representation of the Syrian conflict in the Syrian online news: A critical discourse analysis
Authors: Amir Kadhim Kais
Published: October 2018

This study investigates the usage of Syrian media tools in manipulating people’s perception towards the uprising in Syria. The language of the Syrian media is analyzed using a critical discourse analysis. For this purpose, two frameworks are combined: the historical approach by Wodak (2002) and the socio-semantic network of social actors by Van Leeuwen (2008). The study particularly focuses on the way the Syrian government and the rebels are represented in the Syrian online news Cham press which is a pro-government news agency. The two research questions of this study are: (i) What are the referential and predication strategies used by Cham press in reporting the Syrian conflict? (ii) How do these strategies reflect the ideology that surrounds the representation of rebels in the Syrian news? Three hundred and ninety-seven articles were selected from Cham press based on the most relevant keywords. These articles were taken for a period of six months that is from June to October 2012 and May 2013. The study reveals that the Syrian uprising is negatively represented using terms with negative connotations like terrorism, foreign conspiracy, against the law, foreign fighters that are targeting people and responsible for the massacres that happened in the country.
The Consciousness of History in Malaysia: The Ideas on Merdeka Day in Sarawak
Authors: Sulam Muhaimin , Zamri Norena Abd Karim , Merican Ahmad Murad
Published: October 2018

For decades, the Malaysian national history is in a stable condition and not being challenged by anyone. The enhancement of national history is constantly progress through educational system starting from primary school to university level. The consciousness of national history is the foundation for the unity of the people and country development. Though, from time to time, the status quo starts to face the challenges and disputes which began with small scale and got bigger. This could trigger a national issue. Thus, this study focus on the date of Independence Day amongst Sarawak citizens. As one of the states that form the Federation of Malaysia in 1963, the history of Sarawak as a separate nation with the history of Malaysia has been detected. The consciousness of Merdeka Day for Sarawakian is more to refer to the establishment of the federation rather than the date of August 31, 1957 as the day of independent. To add, this research is to identify the level of consciousness in revising the national history amongst Sarawakian. This study also delves the understanding of “Merdeka” from Sarawakians’ point of view and discuss whether the nation history is proportionate for the Sarawakian. For the methodology, this study applies quantitative and qualitative approaches, a concurrent triangulation mixed method design. The phases of data collection are two including surveys and focus group discussions. Generally, the result shows that the Sarawakian have a new consciousness of the national history.
Type of Paper: Empirical
The role of interdiscursitity in learners’ discussion when writing a formal letter
Authors: Sedhu Daljeet Singh , Safinas Raja Harun Raja Nor
Published: October 2018

Writing is the foundation of real formal task which allows writers to engage in real communication outside the classroom. Thus, formal letter writing is a range whereby learners get engaged in a wide range of writing tasks not limited to corrective facts but also the language used outside of the classroom. This study emphasises on the use of interdiscursivity through learners’ group discussion when writing a formal letter. A qualitative method was employed in this study whereby the participants’ discussions on the process of formal letter writing were recorded. The recordings were then transcribed and analysed. The transcriptions revealed how interdiscursivity could be used as an efficient strategy for formal letter writing. The findings of this study can aid academicians in devising instructional strategies and materials for the teaching of writing formal letter writing. This study implicates that interdiscusivity has a role in learner’s discussion when writing a formal letter.
A FAHP approach to select students’ performance assessment criteria in task-based English language teaching
Authors: Sattar Waseem , Tony Lim Bin Abdullah Muhammad Ridhuan , Mirzaei Fatemeh
Published: October 2018

Assessing students’ performance is a main means to improve students’ learning and can play an important role in strengthening the evaluation process in task-based language teaching. This paper adopts a novel approach to select students’ performance assessment criteria based on fuzzy AHP method. Specifically, after determining dimensions and sub-dimensions of learning, the students’ performance assessment instrument can be established. In the instrument, the dimensions and sub-dimensions can be selected by experts’ opinion. Employing the fuzzy AHP method in group decision-making can facilitate a consensus of decision-makers to reduce uncertainty. The application of this method can make the assessment results more scientific, accurate and objective. It is expected that this work may serve as an assistance tool for members of higher education institutions in improving the educational quality level.
A case on Tamil education in Malaysia: Is Tamil education being sidelined?
Authors: Ibrahim Normardhiah
Published: October 2018

This paper is a part of an empirical research that investigates the status of Mandarin and Tamil language in Malaysia. The empirical research is cleaved into three research questions and hence, three fieldworks. This paper singles out the findings from one of the fieldworks of this study and seeks to lay out and discuss the specific findings with the aim to unveil issues that surround Tamil education in Malaysia. The findings highlighted in this paper involve an interview with a principal of a Tamil vernacular primary school in northern Malaysian state. With the centre of the topic polarized around the notion of Tamil education in Malaysia, the findings obtained from the interview will be presented and discussed as to attain some ideas not only regarding the status of Tamil education in Malaysia, but also the underlying factors that instigate the issues surrounding it.
Association Between Physical Activity Level and Pelvic Floor Muscle Variables in Women
Authors: Carvalhais Alice , Da Roza Thuane , Vilela Sofia , Jorge Renato , Bø Kari
Published: October 2018

In order to investigate the potential impact of physical activity (PA) on pelvic floor muscle (PFM) function, a cross-sectional study was made to analyse the association between PA level and vaginal resting pressure (VRP) and PFM strength and endurance. Thirty-eight continent women and 20 women with stress urinary incontinence (SUI) aged 19 to 49 years were enrolled in the study. PFM variables were assessed by manometry. The PA level was assessed through the International Physical Activity Questionnaire – Short Form. The International Consultation on Incontinence Questionnaire-Urinary Incontinence – Short Form was applied to identify SUI. Pearson’s correlation coefficients were applied to estimate the association between PA and PFM variables. Incontinent women were classified as having a high PA level compared to the continent ones (65.0% vs 34.2%, respectively; p=0.030). There was a positive weak association between PA and VRP in continent (r=0.377) and an inverse association in incontinent women (r=−0.458). No associations were found between PA and PFM strength and endurance. Further studies are needed in order to identify a causal association between PA and SUI.
Medienangebote für Menschen mit Demenz
Authors: Kuhn Christina , Rutenkröger Anja
Published: October 2018

Medienevaluation Internationale Studien befassen sich seit Langem mit dem Thema Medienangebote für Menschen mit Demenz. In der Studie „Medienevaluation“ wurde dieses Wissen zusammengetragen und praktisch erprobt. Die Erhebung von „Medienbiografien“ erfolgte in zwei Pflegeeinrichtungen, um daraus Einzel- und Gruppenangebote zu entwickeln, durchzuführen und zu bewerten. Eine Fallstudie zum Thema Filmangebote für Menschen mit schwerer Demenz hat Überraschendes ergeben.
Fragebogen zum Erleben der Kunsttherapiegruppe in der Psychosomatik aus Patientensicht (FEKTP)
Authors: Ganter-Argast Christiane , Teufel Martin , Sammet Isa , Tagay Sefik , Zipfel Stephan , Mander Johannes
Published: October 2018

Die Kunsttherapie ist eine klinisch anerkannte Therapiemethode, jedoch gibt es immer noch sehr wenige Studien, die sich mit der Wirksamkeit, Wirkfaktoren oder Wirkweisen der Kunsttherapie auseinandersetzen. Insbesondere fehlt bis zum heutigen Zeitpunkt ein speziell für die Kunsttherapie zugeschnittenes und psychometrisch überprüftes Forschungsinstrument, welches Erlebensdimensionen der Kunsttherapiegruppe aus Patientensicht misst. Ein solches Messinstrument könnte Hinweise auf deren Wirksamkeit geben, kunsttherapeutische Gruppenprozesse besser verstehen lassen und zur Qualitätssicherung dienen. Ziel der vorliegenden Untersuchung war die Entwicklung und Validierung des Fragebogens zum Erleben der Kunsttherapiegruppe aus Patientensicht (FEKTP). Dieser Fragebogen basiert auf Grawes und Yaloms Konzepten zu gruppentherapeutischen Wirkfaktoren. Es nahmen 133 Patienten an der Studie teil und beantworteten den FEKTP direkt nach der 6. Kunsttherapiesitzung. Die Patienten bearbeiteten zusätzlich etablierte Symptom- und Erfahrungsfragebögen zu Beginn und zum Ende der Behandlung. Die Faktorenanalysen ergaben eine eindeutige Faktorenstruktur des FEKTP, welche die theoretisch angenommenen Subskalen zum Großteil einordnet. Die testpsychometrischen Hauptgütekriterien des FEKTP (Reliabilität, Validität und Objektivität) lassen sich als gut bis akzeptabel einordnen. Die Kriteriumsvalidität sollte aber in zukünftigen Studien nochmals genauer überprüft werden. Somit liegt nun auch für die Kunsttherapie ein valides Instrument zur systemischen Erfassung von allgemeinen Wirkfaktoren vor. Die Anwendung empfiehlt sich im Forschungs- als auch im Versorgungskontext.
Psychosomatische Sprechstunde in der Hausarztpraxis – ein neues Kooperationsmodell von Psychosomatik und Allgemeinmedizin
Authors: Hartmann Mechthild , Finkenzeller Caroline , Boehlen Friederike Hildegard , Wagenlechner Petra , Peters-Klimm Frank , Herzog Wolfgang
Published: October 2018

Eine hohe Zahl an Patienten mit psychischen oder psychosomatischen Erkrankungen erhält derzeit keine adäquate fachärztliche bzw. fachpsychotherapeutische Behandlung, sondern verbleibt diesbezüglich alleinig beim Hausarzt. Ursachen sind häufig lange Wartezeiten auf Psychotherapie, patientenseitige Barrieren oder offene differenzialdiagnostische Fragen. Daher entwickelten wir ein Versorgungskonzept, das direkt in der Hausarztpraxis ansetzt und offen für jegliche psychosomatische Störung ist. Dieses Modell, das im Kern eine vor-Ort Sprechstunde durch einen Facharzt für Psychosomatische Medizin umfasst, wird im Folgenden vorgestellt. Erste Erfahrungen bezüglich Inanspruchnahme und Patientenklientel belegen eine hohe Akzeptanz seitens Patienten, Hausärzten und Fachärzten für Psychosomatische Medizin.
Resilienz, Progredienzangst und psychische Belastungen bei Patientinnen mit Brustkrebs und gynäkologischen Tumoren, die eine ärztliche Zweitmeinung einholen
Authors: Krebs Jessica , Wasner Sonja , Egloffstein Sainab , Lux Michael P. , Morawa Eva , Beckmann Matthias W. , Erim Yesim
Published: October 2018

Einleitung Das Ziel der Studie war es zu erfassen, wie psychische Belastungen, Progredienzangst und Resilienz bei Patientinnen mit einem Mamma- oder gynäkologischem Malignom, die eine Zweitmeinung bezüglich ihrer onkologischen Behandlung einholen, ausgeprägt sind.

Methode Bei 158 Patientinnen wurden psychische Belastungen (NCCN Distress Thermometer), Kohärenzgefühl (SOC-13) und Progredienzangst (PA-F-KF) erhoben.

Ergebnisse 16,2% der Brustkrebspatientinnen und 20,5% der Patientinnen mit gynäkologischen Tumoren litten unter dysfunktionaler Progredienzangst, 70,4% der Brustkrebspatientinnen und 80,6% der Patientinnen mit gynäkologischen Tumoren unter hohem Distress. Die Patientinnen unterschieden sich hinsichtlich ihrer Resilienz jedoch nicht signifikant von einer bevölkerungsrepräsentativen Stichprobe.

Diskussion In der untersuchten Gruppe der Zweitmeinungs-Patientinnen waren krankheitsbezogene Ängste und psychische Belastungen stark ausgeprägt.

Schlussfolgerung Im Hinblick auf Implikationen für die Arzt-Patienten-Kommunikation erscheint eine weitere wissenschaftliche Beschäftigung mit der Bedeutung psychologischer Variablen beim Einholen onkologischer Zweitmeinungen angezeigt.
Bilaterale Medialis-Rücklagerung bei frühkindlicher Esotropie
Authors: Nassri Amir , Singer Elisabeth , Olschewski Nicole , Temiz Oktay , Abujarad Mohammed , Atili Abed
Published: October 2018

Hintergrund Die bilaterale Medialis-Rücklagerung (BMR) ist ein häufig angewendetes Verfahren zur Behandlung von frühkindlichen Esotropien mit kleineren und größeren Schielwinkeln. Ziel unserer Studie ist die Ermittlung der Dosis-Wirkungs-Beziehung und des Therapieerfolgs.

Design Retrospektive, monozentrische klinische Studie mit demselben Operateur.

Methode 60 Patienten mit frühkindlicher Esotropie, die eine reine BMR mittels einer mikroinvasiven Technik von April 2012 bis September 2015 erhielten, wurden ausgewertet. Erfasst wurden die prä- und postoperativen Daten nach 3, 12 und 36 Monaten. Als Behandlungserfolg wurde ein Restschielwinkel von ≤ ± 10 Prismendioptrien (PD) beim Follow-up nach 12 Monaten oder ein nachweisbar positives Simultansehen definiert.

Ergebnisse Das Alter zum OP-Zeitpunkt lag bei 5,2 ± 4,6 (Median ± SD) Jahren. Der präoperative Schielwinkel in der Ferne betrug 41 ± 10,5 PD und in der Nähe 44 ± 11 PD. Die mittlere Refraktion (sphärisches Äquivalent) betrug + 2,25 dpt. Der postoperative Fernwinkel (n = 58) im 12-Monats-Follow-up betrug 6 ± 9,6 PD und nach 36 Monaten (n = 38) 4 ± 10,5 PD. Die Schielwinkelreduktion pro mm im 12-Monats-Follow-up betrug 3,08 ± 1,20 PD und im 36-Monats-Follow-up 3,18 ± 1,27 PD. Die Schielwinkelreduktion pro mm bei Patienten ≤ 4 Jahren lag bei 3,93 ± 1,86 PD und > 4 Jahren bei 2,81 ± 0,98 PD. Der Therapieerfolg nach dem 12-Monats-Follow-up lag bei 67%. Positives Simultansehen konnte postoperativ bei 62% nachgewiesen werden.

Schlussfolgerung Die BMR ist eine langfristige, effiziente Methode zur Behandlung der frühkindlichen Esotropie. Die mittlere Dosis-Wirkungs-Beziehung nach 36 Monaten lag bei 3,1 PD pro mm.
Hip Abductors and Lumbar Lateral Flexors act as Energy Generators in Running Single-leg Jumps
Authors: Sado Natsuki , Yoshioka Shinsuke , Fukashiro Senshi
Published: October 2018

In humans, hip abductor and lumbar lateral flexor muscles are well-developed as side-to-side lumbopelvic stabilizers. We hypothesized that the hip abductors and lumbar lateral flexors act as energy generators during a running single-leg jump, although they are generally recognized as stabilizers. We collected kinematics and ground reaction force data in running single-leg jumps by 13 male high jumpers and calculated three-dimensional kinetic variables. Hip abduction and lumbosacral lateral flexion towards free leg side torques were exerted during almost the entire take-off phase, exerting positive power during the terminal 2/3 of the phase. The positive work of the hip abductors (1.08±0.30 J/kg) was as large as that of the ankle plantar-flexors, suggesting that the energy-generating potential of the hip abductors compares with that of the extensors of the stance-leg joints. The lumbosacral lateral flexors also performed positive work (0.36±0.18 J/kg), which was 47±25% of the knee extensors, albeit less than the extensors of the stance leg joints. The results implied that the hip abductors and lumbar lateral flexors have substantial potentials not only as stabilizers but also as energy generators and that they act as substantial energy generators during running single-leg jumps.
Metal-Free Synthesis of α-Aminophosphonates from Tertiary Amines and P(O)H Compounds via a Cross-Dehydrogenative Coupling Reaction
Authors: Tang Guo , Lin Binzhou , Lu Guozhang , Lin Rongcan , Cui Yiqun , Liu Yan , Zhao Yufen
Published: October 2018

The various α-aminophosphonates have been prepared from tertiary aromatic and aliphatic amines with P(O)H compounds via a tert-butyl hydroperoxide mediated cross-dehydrogenative coupling reaction, eliminating the need for transition-metal catalysts. The oxidation of tertiary amine by tert-butyl hydroperoxide generates an iminium cation intermediate. A further addition of P(O)H compound to iminium cation gives the desired product.
Direct Conversion of Benzyl Ethers into Aryl Nitriles
Authors: Ren Yun-Lai , Wang Jianji , Tian Xinzhe , Ren Fangping , Cheng Xinqiang , Zhao Shuang
Published: October 2018

A direct method was developed for the conversion of benzyl ethers into aryl nitriles by using NH4OAc as the nitrogen source and ­oxygen as the terminal oxidant with catalysis by TEMPO/HNO3; the method is valuable for both the synthesis of aromatic nitriles and for the deprotection of ether-protected hydroxy groups to form nitrile groups in multistep organic syntheses.
Lower Extremity Free Tissue Transfer in the Setting of Thrombophilia: Analysis of Perioperative Anticoagulation Protocols and Predictors of Flap Failure
Authors: DeFazio Michael , Economides James , Anghel Ersilia , Tefera Eshetu , Evans Karen
Published: October 2018

Background No consensus exists regarding the optimal strategy for perioperative thromboprophylaxis in high-risk microsurgical populations. We present our experience with lower extremity free tissue transfer (FTT) in thrombophilic patients and compare outcomes between non-stratified and risk-stratified anticoagulation protocols.

Methods Between January 2013 and December 2017, 57 patients with documented thrombophilia underwent FTT for non-traumatic, lower extremity reconstruction by a single surgeon. Patients were divided into two cohorts based on the introduction of a novel, risk-stratified algorithm for perioperative anticoagulation in July 2015. Demographic data, chemoprophylaxis profiles, flap outcomes, and complications were retrospectively compared across time periods.

Results Fifty-seven free flaps were performed in hypercoagulable patients treated with non-stratified (n = 27) or risk-stratified (n = 30) thromboprophylaxis. Patients in the risk-stratified cohort received intravenous heparin more often than non-stratified controls (73 vs. 15%, p < 0.001). Lower rates of total (3 vs. 19%, p = 0.06) and partial (10 vs. 37%, p = 0.025) flap loss were observed among risk-stratified patients, paralleling a significant reduction in the prevalence of postoperative thrombotic events (1.2 vs. 12.3%, p = 0.004). While therapeutic versus low-dose heparin infusion was associated with improved flap survival following intraoperative microvascular compromise (86 vs. 25%, p = 0.04), salvage rates in the setting of postoperative thrombosis remained 0%, regardless of protocol. On multivariate analysis, recipient-vessel calcification (odds ratio [OR]: 16.7, p = 0.02) and anastomotic revision (OR, 3.3; p = 0.04) were independently associated with total flap failure.

Conclusion Selective therapeutic anticoagulation may improve microsurgical outcomes in high-risk patients with thrombophilia. Our findings highlight the importance of meticulous technique and recipient-vessel selection as critical determinants of flap success in this population.
Mit Kindern in die Tropen reisen
Authors: Kiep H , Bernhard M. K
Published: October 2018

Reisen mit Kindern in die Tropen werden ambivalent gesehen. Auf der einen Seite stehen gesundheitliche Risiken, die teilweise für (kleine) Kinder erheblich größer sind als für Erwachsene. Auf der anderen Seite steht die Möglichkeit, vielleicht gerade mit den Kindern und für die Kinder fremde Gegenden und Kulturen auf einzigartige Weise erleben zu können. Je nach bereistem Land sind im Vorfeld Reiseimpfungen wie zum Beispiel Typhus, Gelbfieber und Tollwut wichtig, ebenso eine Malariaprophylaxe. Baden in Gewässern und Aufenthalte an Sandstränden bergen die Gefahr einer Infektion mit Bilharziose und Hakenwürmern. Manche in unseren Breiten gut verträgliche Medikamente können unter der höheren tropischen Sonneneinstrahlung fototoxische Reaktionen verursachen. Die Einhaltung hygienischer Maßnahmen ist bei kleinen Kindern schwierig, solange die Kinder noch viele Dinge anfassen und in den Mund stecken. Insgesamt sind Tropenreisen auch mit kleinen Kindern ohne großes Risiko durchführbar, allerdings ist eine sorgfältige und umfassende Vorbereitung dringend notwendig.
Wave tank experiments on the power capture of a float-type wave energy device with a breakwater
Authors: Peng Wei , He Rui , Zhang Jisheng , Xu Tiaojian
Published: October 2018

The objective of this study is to discuss the configuration and hydrodynamic performance of a float-type shoreline wave energy converter coupled with a breakwater. The energy converter is designed to extract wave power by making use of the wave-induced pitch motion of the float which is hinged on a breakwater. Meanwhile, the float is connected with hydraulic pistons, generating the high pressure water stream to drive alternators for electricity generation. A scale model was built in the laboratory at Hohai University, and the friction force was employed as the power take-off damping source. During the experiments, variations in several key parameters, including the wave elevation, wave energy converter (WEC) response (decay motion, free response, or damped motion of the WEC with varying damping levels), and wave-induced tensile forces on the steel wires were instantaneously measured. With these data, the wave reflection coefficient, instantaneous output power, and wave energy conversion efficiency of the model were estimated. The experimental results show that the developed WEC is effective in dissipating the incident wave energy, especially for longer waves, and is able to extract wave energy at a meaningful rate from regular waves. The average output power and wave energy conversion efficiency of the model under the resonance state can be up to 0.13 W and 32.6%, respectively. Although the WEC model harnesses more energy under longer waves, further examination reveals that the device is more efficient when installed in less energetic seas. Meanwhile, the water depth and the spacing between the breakwater and the float are significant factors for the posture and motion characteristics of the float during the process of interaction with water waves.
Frequency splitter based on spoof surface plasmon polariton transmission lines
Authors: Qi Chu , Liao Shaowei , Xue Quan
Published: October 2018

We propose a frequency splitter based on spoof surface plasmon polariton (SSPP) transmission lines (TLs). The device consists of two bent domino SSPP TLs with different geometric parameters, leading to different passbands, forming two frequency band branches. A transition from a rectangular waveguide to the two SSPP TLs is designed for frequency splitting. To achieve efficient transition for both branches in their respective frequency bands, different transition lengths of the two branches and a shifted placement from the center are adopted. Furthermore, for the high frequency band branch, to obtain satisfactory out-of-band rejection below the lower cut-off frequency, an SSPP bandstop structure is introduced by placing SSPP TL sections along the main SSPP TL. A prototype is designed, fabricated, and evaluated. The results prove the feasibility of the proposed SSPP frequency splitter.
Preliminary study of the effects of an anti-gonadotropin-releasing factor vaccine at two initial liveweights on the carcass traits and meat quality of bulls
Authors: Ripoll G. , Noya A. , Casasús I. , Sanz A.
Published: October 2018

The aim of this experiment was to study the effect of the Improvac® anti-gonadotropin-releasing factor vaccine developed for pigs on the carcass quality and shelf life of meat from Serrana de Teruel bulls at two liveweights at the start of immunisation. The anti-gonadotropin-releasing factor vaccine stopped testosterone production regardless of the liveweight. The carcasses of immunised bulls were less heavy and had poorer conformation than those of entire bulls, although the dressing percentages were similar. Immunisation had no influence on the degree of carcass fatness or intramuscular fat content. Immunisation decreased metmyoglobin formation during storage, especially in light bulls. Immunisation reduces the total meat collage, improving tenderness and reducing the ageing time. Minimum toughness was reached 2 weeks earlier than in entire bulls. Quick tenderisation was achieved regardless of the liveweight at immunisation; therefore, the technique studied here could be effective for producing tender meat and avoiding long periods of maturation. In conclusion, immunisation at any of the initial liveweights trialed may be detrimental to animal performance. However, it was effective in delaying metmyoglobin formation and produced more tender meat than that of entire bulls from the first day, thus reducing the ageing time.