scholarly journals Analysis of fabrics and metal threads from two Andalusian liturgical vestments from the seventeenth and eighteenth centuries: a multitechnical approach

2022 ◽  
Vol 137 (1) ◽  
Author(s):  
Adrián Durán ◽  
José Luis Pérez-Rodríguez
Keyword(s):  
The Core ◽  
Materials Used ◽  
Physicochemical Approach

AbstractThis manuscript provided one of the first scientific studies performed on ancient Spanish liturgical vestments by using a multitechnical physicochemical approach. The interlining and lining fabrics were done by cotton and the core of threads by silk. Silver, gold and little amounts of copper were detected. The highest values of gold were found in the metal threads of the cope and the gallon of the chasuble. Two layers were identified: the internal composed by silver and the external by silver and gold. The fibers were proved to be degraded and also the surface of the metal, where scratches and silver-based compounds were detected due to environmental and anthropogenic actions. Indigo was employed as dye in the blue and green fabrics. Wax was detected in the yellow fibers, although other dyes could not be discarded. The materials used in the restoration processes were of minor quality.

scholarly journals Effects of various types of reflectors on the 99Mo production in the VVER-Ts reactor targets

2020 ◽  
Vol 6 (2) ◽  
pp. 89-92
Author(s):  
Oleg Yu. Kochnov ◽  
Pavel A. Danilov
Keyword(s):  
Neutron Flux ◽  
Reactor Core ◽  
Raw Material ◽  
The Core ◽  
Assessment Tasks ◽  
Materials Used ◽  
Core Characteristics ◽  
Water Space ◽  
Reactivity Margin ◽  
Effective Multiplication

The effects from introducing various types of reflectors in the VVR-Ts reactor core on the 99Мо production were analyzed. Earlier the effects of only the beryllium reflector on the VVR-Ts reactor core characteristics, such as reactivity margin, neutron flux in experimental channels, and activity of the accumulated 99Мо, were calculated. The calculations are based on a generated precision model of the core which comprises one experimental channel where targets are irradiated for the 99Мо production. The model was built using the SCALE code. The code allows a fairly broad range of calculations to be performed, from criticality estimation to radiological assessment tasks. As the result of the computational analysis of the model, such characteristics were obtained as the effective multiplication factor, the power density in the 99Мо production targets, the neutron flux in the target raw material, and the quantity of the produced 99Мо after 120 hours of irradiation. The data was compared with the results of similar calculations of the VVR-Ts reactor core parameters. Further, the list of the materials used extensively as the reactor core reflector or moderator was formed based on reference literature. A number of models were obtained and analyzed on its basis, in which the water space on the core periphery was substituted for the investigated materials.

Design for the Controller of Desktop 3D Printer

2014 ◽  
Vol 672-674 ◽  
pp. 894-897
Author(s):  
Ruo Dong Huang ◽  
Xin Wang ◽  
Yi Hui Zheng ◽  
Li Xue Li ◽  
Xi Kui Sheng ◽  
...  
Keyword(s):  
3D Printing ◽  
Software Design ◽  
Stepper Motor ◽  
3D Printer ◽  
Layer By Layer ◽  
The Core ◽  
Whole Process ◽  
Materials Used ◽  
Avr Microcontroller ◽  
Rapid Prototyping Manufacturing

3D printing, is a kind of rapid prototyping manufacturing, fabricating expected objects by way of cumulative constructed layer by layer, based on digital model files and powdered materials used. In this paper, the controller of desktop 3D printer is designed and carried out, both from the hardware and software part. For hardware design, a 32-bit ARM core microcontroller, STM32F103VB is selected as the core, supplemented by stepper motor driver chips, thermocouple digital converters and other devices, which build a desktop 3D printer controller panel. For software design, referred to open-source design being based on the AVR microcontroller, the whole process of 3D printing is accomplished by programming the ARM core microcontroller.

Core Values and Their Reflection in the Speech of the Ural City

2019 ◽  
pp. 97-106
Author(s):  
Ирина Вепрева ◽  
Irina Vepreva ◽  
Наталия Купина ◽  
Natalia Kupina ◽  
Татьяна Ицкович ◽  
...  
Keyword(s):  
Common Good ◽  
Native Speakers ◽  
Core Values ◽  
Middle Urals ◽  
Speech Communication ◽  
The Urals ◽  
Distinctive Features ◽  
The Core ◽  
Materials Used ◽  
Value Preferences

The research outlines the findings of collaborative insights into the core values anchored in the linguistic consciousness of people living in the Urals and represented across diverse areas of speech in the cities of the Middle Urals. The purpose of the study is to understand the linguoaxiologic reality of the current times, interpret representatives of value concepts with a consolidating function. To reach the target, the authors have practiced sociolinguistic monitoring helping to reveal value preferences among the student youth. Using the complementation principle, they have conducted a psycholinguistic experiment aimed at identifying nuclear and peripheral conceptual meanings anchored in the linguistic consciousness. The findings helped to conclude: the core of basic values is a system of interrelated conceptual meanings organized as a cognitive matrix. Based on a meaningful interpretation of the materials used in the experiment, the authors managed to identify the increase in the divergent self-mentality of a subject with free consciousness focused on self-fulfillment and pursuing personal goals. However, at the emotional level, young people stay committed to the socio-centric traditions of the Russian culture: family interests (we-group) prevail over individual interests. The linguoaxiologic analysis of municipal newspaper texts and methods of metalanguage study helped to describe the value aspects of provincial thinking: native speakers feel both as Uralians and Russians with preserved national, primarily, family traditions. The core value of the urban provincial community is little homeland — a key category of the Ural mentality. The mentally relevant mindsets are those related to common good. Using conversation scripts reflecting the distinctive features of speech communication in the Urals, the authors divide the value-thematic and communicative-value text fragments, develop an algorithm for linguoaxiological commenting on oral dialogue.

Analysis of Nozzles of Rapid Prototyping System Oriented to Bio-Manufacture

2010 ◽  
Vol 33 ◽  
pp. 132-138
Author(s):  
Mei Hua Chen ◽  
T.C. Shi ◽  
X. Hu ◽  
J.H. Cai
Keyword(s):  
Rapid Prototyping ◽  
Interdisciplinary Research ◽  
High Performance ◽  
Research Area ◽  
Scientific Basis ◽  
The Core ◽  
Materials Used ◽  
Rapid Prototyping System ◽  
Manufacturing Science ◽  
Important Branch

Bio-manufacture is an interdisciplinary research area, which is based on the development of rapid prototyping technology, biomaterial and biomedicine technologies. It brings a new revolution in manufacturing science. Producing scaffolds of high performance is the purpose of bio-manufacture. For many rapid prototyping, which is suitable for bio-manufacture, the core difference lies in their enable technology. Extrusion-based rapid prototyping technology is an important branch of rapid prototyping, and each system has different nozzle device. In this paper, through in-depth research and analysis of structure, performance and materials used of spray head in the market for bio-manufacture, it can provide scientific basis for selecting more suitable spray head of rapid prototyping for bio-manufacture.

scholarly journals Penerapan Ornamen Sebagai Ciri Budaya Tionghoa pada Chinese Restaurant di Jakarta

Humaniora ◽  
2015 ◽  
Vol 6 (4) ◽  
pp. 540
Author(s):  
Polniwati Salim
Keyword(s):  
Qualitative Method ◽  
Chinese Culture ◽  
Chinese Philosophy ◽  
Symbolic Meaning ◽  
Culture Study ◽  
Chinese Identity ◽  
The Core ◽  
Chinese Restaurant ◽  
Materials Used ◽  
The Aesthetic

Chinese restaurants are obviously connected to Chinese culture for it holds a great importance and is even the core point of creating art. The art would be based upon the aesthetic contents which contain symbolic meaning in Chinese philosophy. In a typical chinese restaurant the connection between tradition and art is represented in the form of ornaments that acts functionally and has specific unique characteristics. This study was conducted by qualitative method with survey, interview, and documentation of the ornaments in chinese restaurant. This study aims to introduce and enrich the knowledge, as the ornaments stand for showing the identity of chinese culture in chinese restaurant. The aesthetical theory about the art of design and the implementation of chinese ornaments took part in the study as well. Result of the study shows that the chinese restaurant observed has implemented the interior and applied the ornaments well in showing chinese identity. Besides, the materials used for furniture and interior elements have given the nuances of Chinese culture. Study concludes that the aesthetic atmosphere of the interior of Dian Xiao Er Restaurant is calm, peaceful, and relaxing like sitting in a modest diner. The dynamics that was created is something impressed repetitive yet not boring 

A New Approach to Manufacturing Biocomposite Sandwich Structures: Mycelium-Based Cores

2016 ◽  
Author(s):  
Lai Jiang ◽  
Daniel Walczyk ◽  
Gavin McIntyre ◽  
Ronald Bucinell
Keyword(s):  
Sandwich Structures ◽  
Agricultural Waste ◽  
Core Material ◽  
Processing Conditions ◽  
New Approach ◽  
Three Point Bending ◽  
The Core ◽  
Materials Used ◽  
Optimal Material ◽  
Core Mixture

A new approach to manufacturing biocomposite sandwich structures is introduced. Materials used in the biocomposite are natural textile reinforcement, mycelium-bound agricultural waste as core, and bioresin. This paper focuses on three specific steps of the seven-step manufacturing process: filling pre-stamped textile shells with core mixture; allowing the core material to grow thereby binding reinforcement particles and textile skins into a unitized preform; and oven drying said preform to drive off moisture and inactivate the mycelium. Specific process details highlighted include design and thermoforming of growth trays, tray sterilization, filling trays with mycelium-inoculated substrates filling and allowing growth to occur, and finally conduction and convection drying/inactivation of the grown parts. To study the new material’s stiffness using different materials and under different processing conditions, specimen dimensions were based on ASTM D7250 and C393 standards. All dried samples were tested in flexure by three-point bending method to determine the stiffness and strength of the resin-less preforms and to identify optimal material combinations.

Investigating Ferroresonance Phenomenon in a Single-Phase Transformer with the Effect of Magnetic Hysteresis

2016 ◽  
Vol 2 (2) ◽  
pp. 248 ◽  
Author(s):  
Behrooz Rezaeealam ◽  
Behzad Norouzi
Keyword(s):  
Hysteresis Loop ◽  
Single Phase ◽  
Magnetic Hysteresis ◽  
Electrical Power ◽  
The Finite Element Method ◽  
The Core ◽  
Core Losses ◽  
Two Space Dimensions ◽  
Materials Used ◽  
Transformer Core

<p>Ferroresonance is a non-linear phenomenon and very dynamic in the power quality problems. This phenomenon should be carefully analyzed so that preventive measures could be taken before its appearance and prevent injury and damage to electrical power appliances. Ferroresonance is seen more in the middle-voltage networks with supplying unloaded or slightly loaded transformers by cables. The materials used in the manufacture of transformer cores are creates a major role in their dynamic behavior. In this article are used from two types magnetic material GOES and NGOES in the transformer core of single phase. The physical behavior of these materials is considered during the core hysteresis. For modeling the hysteresis loop has been used from Jiles-Atherton method. By using the finite element method and with help COMSOL Multiphysics Software, transformer is simulated in two space dimensions. Laboratory test the transformer core hysteresis loop is described and shows which the Jiles-Atherton model is one of the best known models of hysteresis. The results shows which use of GOES materials in the transformer core is cause Significant reduction the core losses in comparison with the NGOES materials. Also change of ferroresonance mode and the severity its occurrence are the results of changing the material used in the transformer core.</p>

A REVIEW OF MECHANICAL BEHAVIOR OF DENTAL CERAMIC RESTORATIONS

2021 ◽  
Author(s):  
ELNAZ SHAFIGH ◽  
MEHRAN ASHRAFI
Keyword(s):  
Mechanical Behavior ◽  
Mechanical Performance ◽  
Ceramic Materials ◽  
Failure Behavior ◽  
Aqueous Environment ◽  
Dental Ceramics ◽  
Manufacturing Method ◽  
The Core ◽  
Materials Used ◽  
Ceramic Restorations

Dental ceramics are well known for restoring the function and aesthetic of lost or damaged teeth. Understanding these materials’ mechanical and aesthetic properties can make a suitable choice for those materials. The longevity of dental ceramics depends on several factors, including manufacturing method, clinical process, and the oral cavity’s aqueous environment. Failure mechanisms in restorative ceramics are complex and a combination of several factors. Different microstructures in the crystalline phase will involve the propagation of cracks and eventually the fatigue of ceramic materials. Large grains reduce mechanical performance compared to small grain sizes. Aesthetic materials used for veneering are weaker than the core materials and fail when even subjected to small loads. The soft bonding in the core–veneer interface and possible residual stresses created during the veneering method are drawbacks of these systems. Studies on the mechanical behavior of these materials have grown significantly in recent years and provide helpful information about static and fatigue experimentation and the failure behavior of various materials used in dental crowns.

AXISYMMETRIC SIMULATION OF BULGING PROCESS IN POLYMERIC MATERIALS DURING PROJECTILE IMPACT

2008 ◽  
Vol 22 (09n11) ◽  
pp. 1598-1603
Author(s):  
KYUNG-HUN LIM ◽  
SEE-JO KIM ◽  
HYUNG-SEOP SHIN ◽  
JOON-HONG CHOI ◽  
JEONG-TAE KIM
Keyword(s):  
Sandwich Panel ◽  
Polymeric Materials ◽  
Projectile Impact ◽  
Material Parameters ◽  
The Core ◽  
Elapsed Time ◽  
Core Thickness ◽  
Impact Problems ◽  
Materials Used ◽  
Axisymmetric Impact

Combination of different materials used both in the projectile and the sandwich panel is getting more important in designing for maximization of energy absorption during impact. In the present study, we have simulated the bulging process during projectile impact for axisymmetric impact problems. We have discussed the bulging velocity tendency depending on some important geometrical and material parameters such as the yield strength, and tensile limit of the core for several different core thickness and different elapsed time after impact by using the AUTODYN commercial software. From our simulation, we have found that material properties have more dominant effects than the geometric properties on the bulging velocity.

scholarly journals The Characterization of Ukrainian Volcanic Tuffs from the Khmelnytsky Region with the Theoretical Analysis of Their Application in Construction and Environmental Technologies

Materials ◽  
2021 ◽  
Vol 14 (24) ◽  
pp. 7723
Author(s):  
Yuliia Trach ◽  
Victor Melnychuk ◽  
Magdalena Maria Michel ◽  
Lidia Reczek ◽  
Tadeusz Siwiec ◽  
...  
Keyword(s):  
High Water ◽  
Scientific Data ◽  
Environmental Engineering ◽  
Mineral Deposits ◽  
Halogenated Organic Compounds ◽  
The Core ◽  
High Water Absorption ◽  
Environmental Technologies ◽  
Materials Used

(1) The mineral deposits are the base resources of materials used in building and environmental engineering applications, especially available locally. Two wells of volcanic tuff deposits in the Khmelnytsky region of Ukraine were investigated in this regard. (2) Physical-mechanical, chemical, and mineralogical analyses of the core samples were carried out. (3) The tuff samples were characterized by visible colour, low compressive strength (4.34–11.13 MPa), and high water absorption (30%). The dominant minerals of the upper horizon were chlorite, pyroxene, kaolinite, quartz, hematite, and calcite, while those of the lower horizon included analcime, quartz, hematite, and calcite. (4) The studied volcanic tuffs seem to be only partly useful for construction applications, and considering their visible colour, the exterior decoration of engineering objects could be possible. The peculiarity of the minerals of the upper horizon is that their crystals consist of Fe2+. An analysis of existing scientific data made it possible to say that these minerals can be considered as an alternative to expensive metallic iron in reducing the toxicity of chromium, uranium, and halogenated organic compounds. The significant presence of hematite allows the application of tuffs to technologies of water purification from As5+, As3+, Cr6+, Cr3+, U6+, Sb5+, and Se4+ oxyanions.

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