quality material
Recently Published Documents


TOTAL DOCUMENTS

149
(FIVE YEARS 58)

H-INDEX

9
(FIVE YEARS 2)

Author(s):  
Arun Kumar Jat

Abstract: Reclaimed asphalt pavement (RAP) is a valuable, high quality material that can be replace over expensive virgin aggregates and binder that can be used for technical, economical and environmental reasons. Use of RAP can be favored all over the world over virgin material on the light of increasing cost of bitumen, the scarcity of high quality aggregates and the pressing need to preserve the environment. Overlay and maintenance resolve medium distress, but reconstruction may feasible and economical while Asphalt pavement are badly deteriorated with time and traffic. This requires the removal of existing pavement surfaces. Recycling such construction waste has benefited from economic to sustainability point of view and reduce the exploitation of natural resources. The shortage of virgin aggregate supplies along with the increase in processing and hauling cost have encouraged the use of reclaimed material from the old structure as base course construction materials and involved in regular practice in various countries around the world. Keywords: RAP1-Reclaimed Asphalt Pavement, DBM2-Dense Bitumenous Macadam,ITS3- Indirect Tensile Strength,MDD4- Maximum Dry Density,OMC5-Optimum Moisture Content, HMA6-Hot Mix Asphalt, UCS7-Unconfined Compressive Strength, CIPR8-Cold In Place Recycling.


Author(s):  
A. I. Nizhegorodov

The design of the suspended nonlinear heating system of modular-trigger and platform furnaces for firing vermiculite and other bulk materials is considered. Previously, the design of linear heating systems did not provide homogeneous heating of thermographed materials, the material in the clutch zones suffered sufficient thermal energy. In addition, overheating of the central zone increased the frequency of the impact of the heaters themselves, which affected the reliability of the furnace. The use of a nonlinear heating system has changed this distribution to the opposite. The power of the intuboxic heater exceeded the power of the central 1,2‒1,36 times depending on the ratio of the diameters of thin and thick (diameter of 4 mm) of the heaters. At the same time, not only their electrical power increased, but the heat radiation streams, falling onto the surface of the supply, which led to an increase in the temperature of the material being processed. The obtained values of the temperature of the vermiculite grains in the fitted zones of the firing module exceed the temperature of the vermiculite in the central zone by 26 %, while it is sufficient for high-quality material intimidation. Due to the use of nonlinear heating system, temperatures were redistributed on heated surfaces in favor of relatively cold previously intuition zones: the heat picture has changed to the opposite, that is, the cold cloth zones have become relatively hot. Ill. 8. Ref. 14.


2021 ◽  
Vol 6 (2) ◽  
pp. 37
Author(s):  
Maimunah Dairani Lamri Banjar

Abstract The schoolbook in general is important in the educational process and their own importance; given the role of the Arabic language in preserving the identity and culture of society, it is therefore necessary to pay attention to its design and preparation, so that it achieves the desired goals. It meets the standards and performance of the quality of the book and addresses the gap between the elements of the language and its skills. Teaching books include an important component in learning, therefore must meet the criteria of teaching books that are worth using in accordance with applicable provisions. And the teaching material in it is also good quality material. The purpose of this research is to find out the quality of the Arabic teaching book grade IV issued by the Ministry of Home Affairs in 2021. The methods used are library research and content analysis. Based on the results of the analysis can be known if there are still some errors in terms of content, presentation, language, and radiography. More research is needed on this book.Keywords: The School book _ standards _ goals _ skills. Teaching Book, Arabic


2021 ◽  
Vol 8 (2) ◽  
Author(s):  
Mohamad Bayi Tabrani ◽  
Puput Puspitorini ◽  
Beni Junedi

Multimedia interaktif berbasis android merupakan salah satu sistem operasi yang mendukung program   pembelajaran, memiliki karakteristik dalam mendorong mahasiswa untuk dapat melakukan belajar secara mandiri tanpa harus dibimbing. Multimedia interaktif berbasis android perlu dikembangkan di setiap jenjang pendidikan merupakan inovasi dalam penyajian materi pembelajaran. Tujuan penelitian adalah mengembangakan multimedia interaktif berbasis android yang valid pada materi kualitas instrumen evaluasi. Metode penelitian yang digunakan merupakan penelitian dan pengembangan (research & development) dengan model pengembangan 4D Thiagarajan terdiri dari pendefenisian (define), perancangan (design), pengembangan (develop), dan penyebaran (disseminate). Hasil pengembangan multimedia interaktif berbasis android memperoleh respon positif dari ahli materi, media serta bahasa dengan kategori kevalidan tinggi dan sudah layak digunakan.Development of Android-based interactive multimedia on the quality of mathematics learning evaluation instruments AndroidAndroid-based interactive multimedia is an operating system that supports learning programs, has characteristics in encouraging students to be able to study independently without having to be guided. Android-based interactive multimedia needs to be developed at every level of education as an innovation in the presentation of learning materials. This research aims to develop a valid Android-based interactive multimedia on the quality material of the evaluation instrument. The research method used is research and development with the Thiagarajan 4D development model consisting of definition, design, development, and dissemination. The results of the development of interactive multimedia based on Android received a positive response from the material, media, and language experts with categories suitable for use.


2021 ◽  
Vol 10 (31) ◽  
Author(s):  
Martial Briand ◽  
Mylène Ruh ◽  
Armelle Darrasse ◽  
Marie-Agnès Jacques ◽  
Nicolas W. G. Chen

We report the complete and circularized genome sequences of 17 strains of Xanthomonas citri pv. fuscans and Xanthomonas phaseoli pv. phaseoli, which cause common bacterial blight of bean. These new assemblies combining PacBio and short-read sequencing methods provide high-quality material for studying the evolution of these plant pathogens.


2021 ◽  
Vol 10 (31) ◽  
Author(s):  
Mylène Ruh ◽  
Martial Briand ◽  
Sophie Bonneau ◽  
Armelle Darrasse ◽  
Marie-Agnès Jacques ◽  
...  

We report the complete and circularized genome sequences of two strains of Xanthomonas citri pv. glycines causing bacterial pustule on soybean and one strain of Xanthomonas euvesicatoria pv. alfalfae causing bacterial leaf and stem spot on alfalfa. These assemblies provide high-quality material for functional and evolutionary studies of these legume pathogens.


Author(s):  
Ana Lúcia da Silva ◽  
Ana Beatriz Duarte Vieira ◽  
Ritielly Hevelin Garrido de Moraes ◽  
Simone Roque Mazoni ◽  
Ivone Kamada

Objective: Identify experiences of the person with intestinal ostomy related to their social life. Methods: Descriptive study, qualitative in nature, carried out with ten people with intestinal ostomy. Data collection was performed at the Stomatherapy Service of a teaching hospital in the Federal District, through semi-structured interviews relating to family and social experience before and after the ostomy. Results: Six men and four women participated, with a mean age of 49 years, most with a permanent colostomy. From the analysis, two categories emerged: “What is it like to live with an ostomy and its challenges”; and “Strategies developed in the face of changes”. In the first category, the following stand out: self-care, lack of adequate bathroom, work activity, eating habits, disruption of body image and embarrassing situations. In the second category, they seek to support religiosity, maintain positive feelings and preserve emotional balance. Conclusion: The ostomy interferes with family and social life. It was evident that the person with ostomy develops strategies to face changes. It is believed that social isolation stems, in part, from the lack of information from society, the lack of quality material that offers comfort and safety, and, finally, the lack of adapted public and private bathrooms.


2021 ◽  
Author(s):  
Christiane Schneider-Löbens ◽  
Siegfried Siegesmund ◽  
Karl-Jochen Stein ◽  
Stefan Lebens

Abstract The steadily increasing demand on the natural stone market is accompanied by a predominantly poor economic balance in the extraction of the raw material "ornamental stone". Thus, the net production of raw blocks is far too low in relation to the resulting overburden, which is often the result of insufficient geoscientific input and evaluation of the deposit itself and the deposit-controlling factors.Under these conditions, the investigation pursued the goal of capturing an essential part of the geological conditions with the analytical observation of the fractures systems, in order to contribute to an optimized stone extraction. Only by critically derived constraints on the quarrying process based on the geological situation can the economic viability of natural stone deposits be maintained or increased in the long term, and this from an environmentally friendly point of view.Profitable dimensional stone production mainly depends on the number of extracted blocks. Compared to statistical approaches the application of the 3D-BlockExpert computer code is based on modelling the block sizes on the discontinuity system such as fracture spacing and fracture orientation. The assessment of all joint and fracture systems provides a forwards-looking approach for sustainable quarry management. It is essential to make the best possible use of high-quality material and to minimize the impact of quarrying activities to nature. Investigations were carried out in quarry areas of different lithologies in Germany and Spain like sandstones, limestones, slate and granites. The block sizes, the irregularity of acute-angled blocks and the waste to block ratio controls the economic success by avoiding time- and cost-consuming procedures based on geoscientific considerations.


2021 ◽  
Vol 238 (06) ◽  
pp. 674-678
Author(s):  
Johannes Menzel-Severing ◽  
Sabine Salla ◽  
Gerd Geerling

AbstractTechnological progress and societal change are transforming medicine, and cornea banks are no exception. New infectiological factors, statutory requirements, management concepts, globalisation and digitalisation are also influencing how such facilities will operate in the future. The goal of providing high quality material to patients with corneal disease remains unaltered. The present article seeks to shed light on the type of material this will involve and under what circumstances it is to be obtained.


2021 ◽  
Author(s):  
EVREN YASA ◽  
İlker Atik ◽  
İpek Kandemir

Abstract Although Selective Laser Melting has become attractive in industrial applications seeking a high geometrical complexity with short lead times and customization, some bottlenecks still exist for wider adoption. Build rate is one of them while the high number of process parameters and their interactions easily exceeding hundreds which affects the part performance is the second. The machine manufacturers supply parameter sets generally optimized for maximum density leading to good mechanical properties. However, other factors need to be considered in process development. This study aims at increasing the build rate of at least 2 times for 17-4 PH stainless steel without any significant effect on the density, surface quality, material composition, mechanical properties and residual stresses. The results show an excessive ultimate tensile strength to yield strength ratio in comparison to reported literature which is attributed to the double yield phenomenon mainly attributed to the phases present in the microstructure as a result of powder chemical composition and processing gas. Thus, it is concluded that powder chemical composition and processing gas are much more effective on the outcome while the process parameters with an increased build rate do not significantly change the results provided that almost full density is reached.


Sign in / Sign up

Export Citation Format

Share Document