scholarly journals Development of a Procedure for Low-Temperature Testing of Wire Materials and Basic Research into the Behaviour of Materials in the Temperature Range of -50 to -80 °C

2017 ◽  
Vol 892 ◽  
pp. 82-88
Author(s):  
Grzegorz Korpala ◽  
Frank Hoffmann ◽  
Rudolf Kawalla
Keyword(s):  
Industrial Development ◽  
Basic Research ◽  
Climatic Conditions ◽  
Material Research ◽  
Limited Extent ◽  
Modern Material ◽  
Processing Industry ◽  
Innovative Materials ◽  
Materials Used ◽  
The One

New technical applications and the ongoing infrastructural and industrial development of regions with extreme climatic conditions place ever greater demands on the properties of the materials used. On the one hand conventional materials can often meet such demands only to a limited extent whilst, on the other, a lack of experience means that sometimes no solid conclusions can be drawn regarding their suitability under extreme conditions. The examination of the influence of extreme environmental conditions on the behaviour of the material and the development of innovative materials with a tailored profile of properties is therefore one of the main tasks of modern material research as well as the material manufacturing and processing industry.

Investigation of the natural ventilation of wind catchers with different geometries in arid region houses

2020 ◽  
Vol 14 (3) ◽  
pp. 7109-7124
Author(s):  
Nasreddine Sakhri ◽  
Younes Menni ◽  
Houari Ameur ◽  
Ali J. Chamkha ◽  
Noureddine Kaid ◽  
...  
Keyword(s):  
Arid Region ◽  
Natural Ventilation ◽  
Reduction Rate ◽  
Internal Flow ◽  
Climatic Conditions ◽  
Maximum Pressure ◽  
Ventilation Technique ◽  
Window Position ◽  
The One ◽  
Flow Velocities

The wind catcher or wind tower is a natural ventilation technique that has been employed in the Middle East region and still until nowadays. The present paper aims to study the effect of the one-sided position of a wind catcher device against the ventilated space or building geometry and its natural ventilation performance. Four models based on the traditional design of a one-sided wind catcher are studied and compared. The study is achieved under the climatic conditions of the South-west of Algeria (arid region). The obtained results showed that the front and Takhtabush’s models were able to create the maximum pressure difference (ΔP) between the windward and leeward of the tower-house system. Internal airflow velocities increased with the increase of wind speed in all studied models. For example, at Vwind = 2 m/s, the internal flow velocities were 1.7, 1.8, 1.3, and 2.5 m/s for model 1, 2, 3, and 4, respectively. However, at Vwind = 6 m/s, the internal flow velocities were 5.6, 5.5, 2.5, and 7 m/s for model 1, 2, 3, and 4, respectively. The higher internal airflow velocities are given by Takhtabush, traditional, front and middle tower models, respectively, with a reduction rate between the tower outlet and occupied space by 72, 42, 36, and 33% for the middle tower, Takhtabush, traditional tower, and the front model tower, respectively. This reduction is due to the due to internal flow resistance. The third part of the study investigates the effect of window (exist opening) position on the opposite wall. The upper, middle and lower window positions are studied and compared. The air stagnation or recirculation zone inside the ventilated space reduced from 55% with the lower window to 46% for the middle window and reached 35% for the upper window position. The Front and Takhtabush models for the one-sided wind catcher with an upper window position are highly recommended for the wind-driven natural ventilation in residential houses that are located in arid regions.

scholarly journals Additive Manufacturing Under Lunar Gravity and Microgravity

2021 ◽  
Vol 33 (2) ◽  
Author(s):  
B. Reitz ◽  
C. Lotz ◽  
N. Gerdes ◽  
S. Linke ◽  
E. Olsen ◽  
...  
Keyword(s):  
Additive Manufacturing ◽  
Spare Parts ◽  
Manufacturing Processes ◽  
Complex Structures ◽  
Lunar Gravity ◽  
Limited Extent ◽  
Test Environment ◽  
Manufacturing Tests ◽  
Laser Experiments ◽  
Materials Used

AbstractMankind is setting to colonize space, for which the manufacturing of habitats, tools, spare parts and other infrastructure is required. Commercial manufacturing processes are already well engineered under standard conditions on Earth, which means under Earth’s gravity and atmosphere. Based on the literature review, additive manufacturing under lunar and other space gravitational conditions have only been researched to a very limited extent. Especially, additive manufacturing offers many advantages, as it can produce complex structures while saving resources. The materials used do not have to be taken along on the mission, they can even be mined and processed on-site. The Einstein-Elevator offers a unique test environment for experiments under different gravitational conditions. Laser experiments on selectively melting regolith simulant are successfully conducted under lunar gravity and microgravity. The created samples are characterized in terms of their geometry, mass and porosity. These experiments are the first additive manufacturing tests under lunar gravity worldwide.

Research highlights: visible light driven photocatalysis and photoluminescence and their applications in water treatment

2016 ◽  
Vol 2 (1) ◽  
pp. 13-16 ◽  
Author(s):  
Qinmin Zheng ◽  
David T. Tan ◽  
Danmeng Shuai
Keyword(s):  
Water Treatment ◽  
Visible Light ◽  
Carbon Nitride ◽  
Graphitic Carbon ◽  
Graphitic Carbon Nitride ◽  
Red Phosphorus ◽  
Visible Light Driven ◽  
Innovative Materials ◽  
Materials Used

We discuss three innovative materials used in photocatalysis and photoluminescence for water treatment applications, including graphitic carbon nitride (g-C3N4), red phosphorus, and upconversion phosphors (Y2SiO5 doped with Pr and Li).

Treatment of frostbite in an open way (without dressings)

1937 ◽  
Vol 33 (1) ◽  
pp. 84-86
Author(s):  
V. A. Petrovykh
Keyword(s):  
Recovery Period ◽  
Climatic Conditions ◽  
The Other ◽  
Critical Approach ◽  
Tatar Strait ◽  
Other Hand ◽  
Number Of Patients ◽  
The One ◽  
Apparent Similarity ◽  
Methods Of Treatment

The harsh climatic conditions of the coast of the Tatar Strait make explainable the large number of patients with frostbite who passed under our supervision during the winter of 1935-36 and amounted to 2.8% (26 people) of the total contingent of inpatients. The variety of recommended methods for treating frostbite, on the one hand, and the relatively long recovery period for all of them, on the other hand, made us take a critical approach to the proposed methods of treatment. All currently existing methods are reduced to the treatment of frostbite areas with bandages; and on the locus morbi apply indifferent or slightly disinfecting ointments, or a similar property of a powder, or wipes moistened with slightly disinfecting solutions, for example, Sol. kalii hyperm. 1: 1000. The apparent similarity of the external manifestations of frostbite and burns inspired us with the idea of ​​conducting frostbite therapy in an "open way", which has long occupied a well-deserved place in the treatment of burns.

Private Enterprise Development in a One-Party Autocratic State: The Case of Alibaba Group in China’s E-Commerce

2018 ◽  
Vol 54 (01) ◽  
pp. 1850001
Author(s):  
FU LAI TONY YU
Keyword(s):  
Financial Stability ◽  
Industrial Development ◽  
Private Enterprise ◽  
Strong Support ◽  
Chinese Government ◽  
Industrial Growth ◽  
Party Members ◽  
Private Entrepreneurs ◽  
The Government ◽  
The One

This study attempts to explain China’s industrial development with special reference to e-commerce. It argues that in a one-party autocratic regime such as China, the collaboration between government officials and private entrepreneurs in strategic industries can promote industrial growth. Since Internet can jeopardize communist party’s goal of maintaining cohesiveness and absolute political power, the Chinese government has imposed surveillance on private operation in all IT operations. Specifically, in e-commerce industry, through collaborations with private enterprises, the communist party can “kill two birds in one arrow.” On the one hand, party members are able to preserve national security and maintain social and financial stability by closely monitoring the private enterprise operation. Moreover, party members can seize tangible and non-tangible benefits from the growth in e-commerce firms. On the other hand, private e-commerce enterprises, by building close connection with public officials and senior party members, can obtain strong support from the government, and thus boosting its business growth. This argument is applied to explain the miraculous growth of Alibaba Group, a private e-commerce enterprise in China. In particular, the paper attempts to show the relationship between the Chinese government and the private entrepreneur in the e-business development and how their collaboration enhances growth in the Internet market.

scholarly journals Improving Interior Environmental Quality Using Sustainable Design in Jordanian Hospital Bedrooms

2020 ◽  
Vol 9 (3) ◽  
pp. 443
Author(s):  
Saeed Hussein Alhmoud ◽  
Çiğdem Çağnan ◽  
Enis Faik Arcan
Keyword(s):  
Interior Design ◽  
Environmental Quality ◽  
Sustainable Design ◽  
Health Sector ◽  
Green Building ◽  
Climatic Conditions ◽  
Building Assessment ◽  
The World ◽  
Set Up ◽  
The One

As the wave of sustainability is sweeping across the major countries and cities of the world, the effect of the inevitable change is finding its way through to the health sector as well. Since the main functions of the hospital include healing the patient, it aims to provide adequate health services to people. Hospitals managers should strive to realize facilities that meet a certain level of demand. This study aims to present the interior environmental quality (IEQ) of bedrooms in Jordanian hospitals and propose a solution to improve indoor environment quality using sustainable design principles. A qualitative research methodology is used in this study. A comparative analysis is made between the original set up of the hospital buildings and the present conditions in which they are in. During the research, it was found that the design to be applied for a hospital should be following the healing environmental characteristics. Besides, the design of hospitals should be made with the climatic conditions of the area in mind. In the advanced countries of the world, hospitals are generally built with extensive research and important factors such as temperature, wind direction and humidity are taken into consideration. The design for a hospital building should be assessed according to the German Green Building Assessment (DGNB) criteria. It has been found that the one-bedroom is ideal for patients because it provides the necessary privacy and also greatly reduces the spread of the disease. In hygienic practices, there should be a first-class healing environment with evidence-based medical research. It was concluded that the practices involving the use of sustainable designs can be followed with the hints received from hospitals in the advanced countries of the world. Keywords: Jordan hospital; IEQ; bedroom; interior design; healthcare; green building assessment; DGNB

scholarly journals Indigenous economies in the Arctic

Elem Sci Anth ◽  
2021 ◽  
Vol 9 (1) ◽  
Author(s):  
Elena Gladun ◽  
Soili Nysten-Haarala ◽  
Svetlana Tulaeva
Keyword(s):  
Industrial Development ◽  
Indigenous Communities ◽  
Well Being ◽  
The United States ◽  
Indigenous Populations ◽  
The Arctic ◽  
Young Generation ◽  
Way Of Life ◽  
Economic Activities ◽  
The One

There is a growing global interest in Arctic natural resources that have a strong influence on the local economies. The Arctic economy is a rather unique phenomenon encompassing Indigenous practices, local economic activities, and industrial development. Indigenous economies vary across the Arctic states and exhibit divergent economic mixtures. In globalizing societies and full market economies, traditional Indigenous economies are changing and perceived especially by the non-Indigenous to be a tribute to old customs rather than a way of life that is being followed by the young generation. However, certain groups of the contemporary Indigenous populations in the Arctic continue to preserve their culture and ensure the continuation of Indigenous ways of life. The development of Indigenous communities is closely linked to their economic well-being, on the one hand, and to their culture and traditions, on the other. Our article contributes to the discussion on the significance of Indigenous economies in providing sustainability in terms of Indigenous communities, their culture, and traditions. The research objective is to identify strategies and tools that sustain Indigenous economies as well as the goals of various stakeholders in encouraging and supporting the traditional economic activities of Indigenous peoples. We contrast three countries—Russia, Finland, and the United States (Alaska)—and discuss some governmental strategies that can be employed for preserving unique Indigenous economies. The research methods consist of a content analysis of state and regional legislation and strategies, social studies of stakeholders’ opinions, case studies describing market infrastructure, and economic activities as well as features of traditional lifestyles and Indigenous knowledge typical of these regions.

scholarly journals Heritage Building Stones from Évora, Portugal

2020 ◽  
Author(s):  
Luis Lopes
Keyword(s):  
Analytical Techniques ◽  
The Other ◽  
World Heritage Site ◽  
Raw Material ◽  
Other Hand ◽  
Heritage Site ◽  
Ancient Rock ◽  
Materials Used ◽  
The One ◽  
The City

<p>The city of Évora, a World Heritage Site recognized by UNESCO in 1986, also owes this recognition to the stones that built its monuments and preserve them until today.</p><p>This work brings together the contributions that we have gathered over the past three decades and allow us to have a very complete idea, not only about the materials used in the hundreds of monuments and historic buildings but also about their provenance. If some materials are so emblematic that they allow an immediate identification with the naked eye, others needed more sophisticated and precise techniques so that there was no doubt about their origin.</p><p>The igneous rocks and gneisses of granite composition are part of the “Massif of Évora” on which the city is built. Thus, and quite naturally they are by far the most represented group in monuments from all historical periods. Its function is essentially structural, but there are also functional, ornamental and decorative objects. For example, the oldest megalithic structures found in the vicinity of the city are made up of large granite blocks that often had to be transported to their locations.</p><p>On the other hand, many gargoyles and statues that decorate the churches are also made up of these granite rocks. On these, the natural erosion of centuries of exposure to the environment has led to a state of alteration, sometimes very accentuated, which would justify its replacement by replicas sculpted in similar rocks. Provenance studies have made it possible to identify old quarries in the vicinity of the city where, on the one hand, the ancient rock extraction techniques can be observed and on the other hand, they allow the obtaining of the raw material necessary for these restoration and conservation works. In any case, they are places that need to be inventoried and protected, with the municipality already aware of their existence.</p><p>As well as the monuments of the Roman Period, also the structures of the Medieval Period, such as the city walls, the Cathedral (started to be built in 1186 AD) and all the great churches, were also built with these granitoids.</p><p>In addition to these rocks, many others of multiple varieties and origins are present. The marbles, especially the Estremoz Marbles (Global Heritage Stone Resource), are ubiquitous in the city, but there are also emblematic marbles from other places, some easily identifiable (ie Viana do Alentejo, Escoural, Trigaches, Serpa and Vila Verde de Ficalho, for presenting mineralogy, textures, colors and patterns which, together with more recent analytical techniques, have confirmed its provenance.</p><p>Sedimentary rocks, with emphasis on Portuguese Mesozoic limestones, ie Lioz - GHSR and Brecha da Arrábida - GHSR candidate, among others more rare and with very specific use in ornamental details, are also present and contribute to enrich a heritage in stone that makes this city so special and very popular with tourists of all nationalities.</p><p>Acknowledgments: the authors thank to FCT for funding the ICT (UID/GEO/04683/2019), as well as COMPETE POCI-01-0145-FEDER-007690.</p>

scholarly journals Tooth Mobility Reproduction in Dental Material Research: A Scoping Review

2020 ◽  
Vol 14 (1) ◽  
pp. 465-473
Author(s):  
Yee Ang ◽  
Masfueh Razali ◽  
Norziha Yahaya
Keyword(s):  
Alveolar Bone ◽  
Material Research ◽  
Laboratory Studies ◽  
Tooth Mobility ◽  
Cochrane Database ◽  
Combination Approach ◽  
Materials Used ◽  
Centre Of Rotation ◽  
Laboratory Models

Background: Introducing tooth mobility simulation in laboratory studies can provide results with high accuracy and predictability. Objectives: This study aims to review in vitro methodologies replicating tooth mobility and provide a recommended approach for future laboratory models. Methods: Databases, such as PubMed, Cochrane Database of Systematic Review, BioMed Central and Chinese databases are searched, and twelve articles are included in the final review. Results: Simulation methods of tooth mobility involving socket enlargement, screw loosening, alveolar bone loss simulation and a combination approach are identified from the extracted data. The materials used in preparing artificial teeth, artificial sockets and periodontal ligament simulator are discussed with a focus on their limitations. The achieved degrees of mobility and the presence of the centre of rotation are also evaluated. A timeline of the review articles is constructed to understand the trend of the preferred methods in tooth mobility simulation. Conclusion: Future in vitro investigations can achieve clinical reliability, particularly for materials tested in the field of dental traumatology and periodontology, by recognising the importance of incorporating tooth mobility in laboratory studies. Improvised methods are proposed to ensure that potential laboratory models can resemble the actual oral environment.

scholarly journals From Translation Studies and audiovisual translation to media accessibility

Target ◽  
2016 ◽  
Vol 28 (2) ◽  
pp. 248-260 ◽  
Author(s):  
Aline Remael ◽  
Nina Reviers ◽  
Reinhild Vandekerckhove
Keyword(s):  
Speech Recognition ◽  
Basic Research ◽  
Translation Studies ◽  
Hybrid Form ◽  
Audio Description ◽  
Translation Practice ◽  
Recent Developments ◽  
Key Issues ◽  
The One

Abstract Recent developments in Translation Studies and translation practice have not only led to a profusion of approaches, but also to the development of new text forms and translation modes. Media Accessibility, particularly audio description (AD) and subtitling for the deaf and hard-of-hearing (SDH), is an example of such a ‘new’ mode. SDH has been evolving quickly in recent decades and new developments such as interlingual SDH and live subtitling with speech recognition bring it closer to established forms of translation and interpreting. On the one hand, interlingual SDH reintroduces Jakobson’s (1959) ‘translation proper’ while the use of speech recognition has led to the creation of a hybrid form that has affinities with both subtitling and interpreting. Audio description, for its part, cannot even be fitted into Jakobson’s ‘intersemiotic translation’ model since it involves translation from images into words. Research into AD is especially interesting since it rallies methods from adjacent disciplines, much in the same way that Holmes ([1972] 1988) described TS when it was a fledgling discipline. In 2008, Braun set out a research agenda for AD and the wealth of topics and research approaches dealt with in her article illustrate the immense complexity of this field and the work still to be done. Although AD and SDH research have developed at different paces and are concerned with different topics, converging trends do appear. Particularly the role of technology and the concept of multimodality seem to be key issues. This article aims to give an overview of current research trends in both these areas. It illustrates the possibilities of technology-driven research – particularly popular in SDH and live-subtitling research – while at the same time underlining the value of individual, human-driven approaches, which are still the main ‘modus operandi’ in the younger discipline of AD where much basic research is still required.

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