scholarly journals F-molding: a new production method for largely aspherical mirrors of cordierite

2020 ◽  
Author(s):  
Hidehito Himeno ◽  
Yuji Ikeda ◽  
Shinji Mukai ◽  
Hidenori Yamanokuchi ◽  
Takato Honjo ◽  
...  
Keyword(s):  
Production Method ◽  
New Production ◽  
Aspherical Mirrors

scholarly journals Production organization capacity of ethnic minorities in northwestern region of Vietnam

2020 ◽  
Vol 210 ◽  
pp. 16004
Author(s):  
Thu Trang Vu ◽  
Dung Vu ◽  
Thi Mai Lan Nguyen
Keyword(s):  
Ethnic Minorities ◽  
Shifting Cultivation ◽  
Production Capacity ◽  
Production Method ◽  
Small Scale ◽  
New Production ◽  
Organization Capacity ◽  
Northwestern Region ◽  
Traditional Production ◽  
Production Organization

Survey results of 1,452 people representing families of 6 ethnic minorities in 11 communes of 7 districts in 7 provinces in the Northwest region shows that the production organization capacity of the ethnic minorities surveyed has changed, but still remains many limitations. The change in production capacity of ethnic minorities is reflected in the fact that the majority of families have produced in a new way (know how to use some machines, use new plant varieties and breeds, apply chemical fertilizers, use pesticides, and some agricultural products produced for sale). The limitations of the production organization capacity of ethnic minority families are shifting cultivation, dibbling, rudimentary production tools, low labor productivity, production by small-scale, autarky, shifting cultivation of wandering hilltribes). If comparing between traditional production method and new production method, the traditional production method is still more prevalent. One of the main causes of this situation is that ethnic minorities live in mountainous areas with difficult transportation, so the main cultivation method is shifting cultivation. The application of machines in production faces many difficulties.

scholarly journals Preparation Method of Spherical and Monocrystalline Aluminum Powder

Metals ◽  
2019 ◽  
Vol 9 (3) ◽  
pp. 375 ◽  
Author(s):  
Mateusz Skalon ◽  
Marek Hebda ◽  
Ricardo Buzolin ◽  
Gernot Pottlacher ◽  
Stefan Mitsche ◽  
...  
Keyword(s):  
Silica Nanoparticles ◽  
Aluminum Powder ◽  
Electron Backscatter Diffraction ◽  
High Surface ◽  
Spherical Shape ◽  
Production Method ◽  
Processing Temperature ◽  
Powder Preparation ◽  
New Production ◽  
Aluminum Particles

This paper presents a new production method for a spherical and monocrystalline aluminum powder. Aluminum powder of irregular particle shapes was mixed with silica nanoparticles and heated to a temperature above the melting point of aluminum. Due to its molten state, high surface tension, and poor wettability, the aluminum particles were transformed into liquid and spherical droplets separated by silica nanoparticles. The spherical shape was then retained when the aluminum particles solidified. The influence of the processing temperature on the particle shape, phase composition, and microstructure was investigated. Moreover, calorimetric, X-ray diffraction, grain size, and scanning electron microscopy with electron backscatter diffraction (SEM-EBSD) measurements of the particles’ microstructure are presented. It is proven that, by this means, a spherical and monocrystalline aluminum powder can be efficiently created directly from an air-atomized irregular powder. The observed phenomenon of particles becoming round is of great importance, especially when considering powder preparation for powder-based additive manufacturing processes.

HORIZONTAL DRILLING, A NEW PRODUCTION METHOD

1988 ◽  
Vol 28 (1) ◽  
pp. 41
Author(s):  
Jacques Bosio
Keyword(s):  
World Wide ◽  
Horizontal Wells ◽  
Production Method ◽  
New Production ◽  
Horizontal Drilling ◽  
New Approach ◽  
Flow Geometry ◽  
The Future ◽  
Deviated Wells

Vertical or deviated wells cross a production formation for only short distances. Horizontal wells, however, are capable of remaining within a reservoir for distances up to several hundred metres in an effort to enhance production possibilities.A world-wide coverage of the method will be presented, with the latest information on drilling, logging, completion and costs.Application of horizontal wells will be described with an emphasis on the production results recently obtained and, more particularly, on the Rospo Mare field, offshore, in the Adriatic Sea.Horizontal wells are providing a new approach to the flow geometry within a production formation. There is no doubt that they will be used more and more in the future to optimise the drainage of most reservoirs.

scholarly journals Impact Toughness of FRTP Composites Produced by 3D Printing

Materials ◽  
2020 ◽  
Vol 13 (24) ◽  
pp. 5654
Author(s):  
Milan Vaško ◽  
Milan Sága ◽  
Jaroslav Majko ◽  
Alan Vaško ◽  
Marián Handrik
Keyword(s):  
3D Printing ◽  
Mechanical Testing ◽  
Impact Load ◽  
Production Method ◽  
Research Area ◽  
New Production ◽  
Manufacturing Method ◽  
Continuous Fibre ◽  
Research Activities ◽  
The Impact

The additive manufacturing represents a new production method of composites reinforced with a continuous fibre. In recent times, the material produced by this new manufacturing method constituted a replacement for conventional materials—e.g., steel in many technical areas. As the research on FRTP composites is currently under way, the purpose of this article is to add information to the mosaic of studies in this research area. The scientific articles published until now have focused especially on mechanical testing, such as tensile and bending mechanical testing and their assessment. Therefore, the authors decided to carry out and assess the impact test of the FRTP composites produced by 3D printing because this area offers a large extent of research activities. We observed the influence of the reinforcement in the form of the micro-fibre carbon in the thermoplastic (Onyx) or a continuous reinforcement fibre in the lamina on the specimen’s behaviour during the impact load processes. The results of the experimental measurements show that the presence of a continuous fibre in the structure significantly affects the strength of the printed specimens; however, the design process of the printed object has to take into account the importance of selecting a suitable fibre type. The selection of a suitable strategy for arranging the fibre in the lamina and the direction of the impact load against the position of the fibre seem to be very important parameters.

scholarly journals Manufacture of face gearing – a new production method by means of determined material pre-distribution

2018 ◽  
Vol 15 ◽  
pp. 511-518 ◽  
Author(s):  
André Weiß ◽  
Mathias Liewald ◽  
Alexander Weiß ◽  
Nadja Missal
Keyword(s):  
Production Method ◽  
New Production

A New Method of Separating and Refining β-Methylnaphthalene from Wash Oil

2012 ◽  
Vol 549 ◽  
pp. 225-228
Author(s):  
Yong Sheng E ◽  
Xiao Dan Sun
Keyword(s):  
Sulfuric Acid ◽  
Production Method ◽  
New Method ◽  
New Production ◽  
Domestic Production ◽  
Current Technology

This paper introduces the current technology of separating and refining β-methylnaphthalene from wash oil. On this basis, I propose a new production method of β-methylnaphthalene after many experiments. Industrial methylnaphthalene is washed twice with sulfuric acid and is distilled once. The content of β-methylnaphthalene is higher than 96%.The yield is 60%, which is higher than current domestic production levels.

scholarly journals Design and Development of an E-Textile Mat for Assuring the Comfort of Bedridden Persons

Materials ◽  
2021 ◽  
Vol 14 (18) ◽  
pp. 5437
Author(s):  
Daniela Sofronova ◽  
Radostina A. Angelova ◽  
Yavor Sofronov
Keyword(s):  
Body Position ◽  
Production Method ◽  
High Wear Resistance ◽  
Continuous Control ◽  
Decubitus Ulcers ◽  
New Production ◽  
Electrically Conductive ◽  
Software Application ◽  
Non Invasive ◽  
Conductive Properties

An e-textile mat with capacitive textile sensors was designed and manufactured to monitor body position and prevent decubitus ulcers in the case of bedridden people. The sensors were incorporated through a process of machine embroidery with electrically conductive threads. A new production method for the conductive threads is still expected to be developed, resulting in good conductive properties, high wear resistance and durability. Samples of five variants of motifs without cross-stitching were studied, and the capacity and electrical resistance were determined experimentally. A prototype of the e-textile mat was made with a motif showing the best ratio between the inserted thread and the measured capacity. A hardware solution and a software application for collecting, processing and visualising the received information were developed. Tests were performed in real conditions, which clearly showed that the designed e-textile mat could be successfully applied for non-invasive and continuous control of the position of the human body in a supine position to prevent decubitus ulcers.

scholarly journals Development of Novel Alumina by Solid-State Reaction for 99Mo/99mTc Adsorbent Material

Al-Kimia ◽  
2019 ◽  
Vol 7 (2) ◽  
Author(s):  
Miftakul Munir ◽  
Enny Lestari ◽  
Hambali Hambali ◽  
Kadarisman Kadarisman ◽  
Marlina Marlina
Keyword(s):  
Solid State ◽  
Solid State Reaction ◽  
Specific Activity ◽  
Production Method ◽  
Ammonium Bicarbonate ◽  
New Production ◽  
Generator System ◽  
Bet Method ◽  
Daughter Radionuclide ◽  
99Mtc Generator

Technetium-99m (99mTc), a daughter radionuclide of molybdenum-99 (99Mo), is the most widely used radiodiagnostic agent due to its ideal characteristics. The separation of this radionuclide from 99Mo is commonly performed using alumina. However, a new production method of this radionuclide, which employs a low specific activity 99Mo, makes alumina no longer suitable as separation material. This study aims to develop novel alumina using a facile solid-state reaction for 99Mo/99mTc generator system. The SS-alumina was synthesized from aluminium nitrate nonahydrate and ammonium bicarbonate without solvent. The resulted SS-alumina was then analyzed by FTIR and BET method. 99Mo adsorption and 99mTc releasing study on a series of pH were also performed. FTIR study revealed that the resulting material was Al2O3 with a surface area of 237.65 m2/g. The adsorption capacity, 99mTc yield, 99Mo breakthrough, and alumina breakthrough were 76.06 mg Mo/g alumina, 80.31%, 56.5 µCi/mCi 99mTc, and less than 5 mg/mL, respectively. The elution profile shows a high activity of 99mTc in 2nd and 3rd fraction. It is concluded that the SS-alumina shows good performance as adsorbent material for separation of a 99Mo/99mTc and further work is now underway.

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