scholarly journals Biomimetic Kinetic Shading Facade Inspired by Tree Morphology for Improving Occupant’s Daylight Performance

2021 ◽  
Vol 8 (1) ◽  
pp. 65-85
Author(s):  
Seyed Morteza Hosseini ◽  
◽  
Fodil Fadli ◽  
Masi Mohammadi ◽  
◽  
...  
Keyword(s):  
Modular Forms ◽  
High Performance ◽  
Morphological Changes ◽  
Relevant Literature ◽  
Base Case ◽  
Literature Study ◽  
Tree Morphology ◽  
Morphological Approach ◽  
Daylighting Simulation ◽  
Daylight Performance

Many recent studies in the field of the kinetic façade developed the grid-based modular forms through primary kinetic movements which are restricted in the simple shapes. However, learning from biological analogies reveals that plants and trees provide adjustable daylighting strategies by means of multilayered and curvature morphological changes. This research builds on a relevant literature study, observation, biomimicry morphological approach (top-down), and parametric daylighting simulation to develop a multilayered biomimetic kinetic façade form, inspired by tree morphology to improve occupants’ daylight performance. The first part of the research uses a literature review to explore how biomimicry influences the kinetic façade’s functions. Then, the study applies the biomimicry morphological approach to extract the formal strategies of tress due to dynamic daylight. Concerning functional convergence, the biomimicry principles are translated to the kinetic façade form configuration and movements. The extracted forms and movements are translated into the design solutions for the kinetic façade resulting in the flexible form by using intersected-multilayered skin and kinetic vectors with curvature movements. The comprehensive annual climate-based metrics and luminance-based metric simulation (625 alternatives) confirm the high performance of the bio-inspired complex kinetic façade for improving occupants’ daylight performance and preventing visual discomfort in comparison with the simple plain window as the base case. The kinetic façade provides daylight performance improvement, especially the best case achieves spatial Daylight Autonomy, Useful Daylight Illuminance, and Exceed Useful Daylight Illuminance of 50.6, 85.5, 7.55 respectively.

Electrochemical Deposition of Polypyrrole Nanostructures for Energy Applications: A Review

2020 ◽  
Vol 16 (4) ◽  
pp. 462-477 ◽  
Author(s):  
Patrizia Bocchetta ◽  
Domenico Frattini ◽  
Miriana Tagliente ◽  
Filippo Selleri
Keyword(s):  
Lithium Batteries ◽  
High Performance ◽  
Relevant Literature ◽  
Chemical Parameters ◽  
Energy Devices ◽  
Energy Applications ◽  
Physico Chemical ◽  
Potential Applications ◽  
Template Free ◽  
Cathodic Polymerization

By collecting and analyzing relevant literature results, we demonstrate that the nanostructuring of polypyrrole (PPy) electrodes is a crucial strategy to achieve high performance and stability in energy devices such as fuel cells, lithium batteries and supercapacitors. In this critic and comprehensive review, we focus the attention on the electrochemical methods for deposition of PPy, nanostructures and potential applications, by analyzing the effect of different physico-chemical parameters, electro-oxidative conditions including template-based or template-free depositions and cathodic polymerization. Diverse interfaces and morphologies of polymer nanodeposits are also discussed.

scholarly journals Digital Addiction: Systematic Review of Computer Game Addiction Impact on Adolescent Physical Health

Electronics ◽  
2021 ◽  
Vol 10 (9) ◽  
pp. 996
Author(s):  
Norshakirah Aziz ◽  
Md Jan Nordin ◽  
Said Jadid Abdulkadir ◽  
Muhammad Muhaimin M. Salih
Keyword(s):  
Physical Health ◽  
Computer Games ◽  
Relevant Literature ◽  
Primary Objective ◽  
Extensive Literature ◽  
Literature Study ◽  
Computer Gaming ◽  
Digital Addiction ◽  
The Impact ◽  
Malaysian Adolescents

The advancement of technology has enabled powerful microprocessors to render high-quality graphics for computer gaming. Despite being intended for leisure purposes, several components of the games alongside the gamer’s environmental factors have resulted in digital addiction (DA) towards computer games such as massively multiplayer online games (MMOG). Excessive gaming among adolescents has various negative impacts on an individual. However, only a few researchers have addressed the impact of DA on physical health. Thus, the primary objective of this research is to study the impact of DA on physical health among Malaysian adolescents. This study focuses on Malaysian adolescents of ages 12–18 years old who are addicted to computer games, specifically the MMOG. The methodology used for the study involves focus group discussions (FGD) and extensive literature study. The FGD sessions have involved both medical experts and game experts. The outcome of FGD discussion is recorded and justified with the existing relevant literature from high-impact journals, theses, conferences, books, and reports. This paper provides evidence of five physical health impacts of DA associated with adolescents. The factors of DA, the addiction components existing in MMOG computer games, and the DA health risk assessment are presented in the results section. Based on the study, it is concluded that DA among Malaysian adolescents can cause various impacts on physical health such as obesity, back pain, and neck pain, orthopaedic/joint muscle, eyesight problem, hearing problem, as well as physical inactivity.

scholarly journals Optimization of Gamma Aminobutyric Acid Production Using High Pressure Processing (HPP) by Lactobacillus brevis PML1

2022 ◽  
Vol 2022 ◽  
pp. 1-9
Author(s):  
Atefe Ghafurian Nasab ◽  
Sayed Ali Mortazavi ◽  
Farideh Tabatabaei Yazdi ◽  
Mahboobe Sarabi Jamab
Keyword(s):  
High Performance ◽  
Morphological Changes ◽  
Control Sample ◽  
Bioactive Compound ◽  
Lactobacillus Brevis ◽  
High Pressure Processing ◽  
Aminobutyric Acid ◽  
Gamma Aminobutyric Acid ◽  
Viability Analysis ◽  
Layer Chromatography

In the present research, the production potential of gamma aminobutyric acid (GABA) using Lactobacillus brevis PML1 was investigated. In addition, the microorganism viability was examined in MAN, ROGOSA, and SHARPE (MRS) after undergoing high hydrostatic pressure at 100, 200, and 300 MPa for 5, 10, and 15 min. Response surface methodology (RSM) was applied to optimize the production conditions of GABA as well as the bacteria viability. Analysis of variance (ANOVA) indicated that both the independent variables (pressure and time) significantly influenced the dependent ones (GABA and bacteria viability) ( P < 0.05 ). The optimum extraction conditions to maximize the production of GABA included the pressure of 300 MPa and the time of 15 min. The amount of the compound was quantified using thin-layer chromatography (TLC) and spectrophotometry. For the process optimization, a central composite design (CCD) was created using Design Expert with 5 replications at the center point, whereby the highest content of GABA was obtained to be 397.73 ppm which was confirmed by high performance liquid chromatography (HPLC). Moreover, scanning electron microscopy (SEM) was utilized to observe the morphological changes in the microorganism. The results revealed that not only did have Lactobacillus brevis PML1 the potential for the production of GABA under conventional conditions (control sample) but also the content of this bioactive compound could be elevated by optimizing the production parameters.

scholarly journals The Instrumental Framework to Measuring Environmental Awareness

2019 ◽  
Vol 15 (2) ◽  
pp. 101
Author(s):  
R. A. Vesitara Kencanasari ◽  
Usep Surahman ◽  
Asep Yudi Permana
Keyword(s):  
Literature Review ◽  
Public Awareness ◽  
Environmental Awareness ◽  
Relevant Literature ◽  
Literature Study ◽  
Awareness Training ◽  
Study Results ◽  
And Behavior ◽  
Attitudes And Behavior ◽  
Awareness Level

Environmental awareness needs to be increased because it plays an important role for the survival of life. To find out the level of public awareness of the environment it is necessary to conduct a workshop or environmental awareness training. The purpose of this study is to identify and generate an instrument indicator to measure the environmental awareness. This article looks at a variety of relevant literature in order to explore the aspects that must be present In the instrument to measuring the environmental awareness level. The literature study results are obtained the aspects that must have to consist of two aspects namely pro-environment and not pro-environment, in which indicators are made from the start of knowledge, attitudes and behavior. The implication of this literature review is to provide information and recommend a set of a framework to academics in making instruments measuring the level of public awareness of the environment.

scholarly journals Impact of Alternative Stabilization Strategies for the Production of PAN-Based Carbon Fibers with High Performance

Fibers ◽  
2020 ◽  
Vol 8 (6) ◽  
pp. 33 ◽  
Author(s):  
Spyridon Soulis ◽  
George Konstantopoulos ◽  
Elias P. Koumoulos ◽  
Costas A. Charitidis
Keyword(s):  
Mechanical Properties ◽  
Carbon Fibers ◽  
Thermal Processing ◽  
High Performance ◽  
Relevant Literature ◽  
Thermomechanical Properties ◽  
Composition Effect ◽  
Ladder Polymer ◽  
Fiber Manufacturing ◽  
Time And Energy

The aim of this work is to review a possible correlation of composition, thermal processing, and recent alternative stabilization technologies to the mechanical properties. The chemical microstructure of polyacrylonitrile (PAN) is discussed in detail to understand the influence in thermomechanical properties during stabilization by observing transformation from thermoplastic to ladder polymer. In addition, relevant literature data are used to understand the comonomer composition effect on mechanical properties. Technologies of direct fiber heating by irradiation have been recently involved and hold promise to enhance performance, reduce processing time and energy consumption. Carbon fiber manufacturing can provide benefits by using higher comonomer ratios, similar to textile grade or melt-spun PAN, in order to cut costs derived from an acrylonitrile precursor, without suffering in regard to mechanical properties. Energy intensive processes of stabilization and carbonization remain a challenging field of research in order to reduce both environmental impact and cost of the wide commercialization of carbon fibers (CFs) to enable their broad application.

scholarly journals Using a laser measurement system for monitoring morphological changes on the Strug rock fall, Slovenia

2005 ◽  
Vol 5 (1) ◽  
pp. 143-153 ◽  
Author(s):  
M. Mikoš ◽  
A. Vidmar ◽  
M. Brilly
Keyword(s):  
Fixed Points ◽  
Cross Sections ◽  
Measurement System ◽  
High Performance ◽  
Morphological Changes ◽  
Ground Surface ◽  
Rock Fall ◽  
Laser Measurement ◽  
Laser Measurement System ◽  
Surface Changes

Abstract. A medium-ranged high performance handheld reflectorless laser measurement system, was used for a morphological survey on the Strug rock fall in W Slovenia in the period from August 2003 to August 2004. The purpose was to evaluate its potential for monitoring ground surface changes in rock fall source areas and to help evaluating morphological changes by measuring distance from fixed points. In the area, 21 fixed geodetic points have been established. Altogether, seven measurement sets with more than 5500 points have been gathered in the rock fall area. Choosing a point cloud with a density of less than 1 point per 10m2 on a very rough rock fall surface failed to be a good solution. The changes on larger areas were shown by displacements of selected significantly large-sized rock blocks with a volume of several m3. Because only smaller changes were observed between the single field series, the rock fall surface generally remained unchanged. Local surface changes of the order of 1 m or more, were clearly shown by measurements in the selected referenced cross sections. The usage of these cross sections gave a possibility to evaluate volumetric changes on the surface. The laser measurement system provided a good replacement for the classical terrestrial geodetic survey equipment, especially when performing remote monitoring of morphological changes in rock fall hazard zones, however, the case is different when fixed points are to be measured precisely.

Developing a scale for measuring high performance partnerships

2015 ◽  
Vol 8 (1) ◽  
pp. 87-108 ◽  
Author(s):  
André de Waal ◽  
Robert Goedegebuure ◽  
Eveline Hinfelaar
Keyword(s):  
Value Chain ◽  
High Performance ◽  
Strong Relationship ◽  
Literature Study ◽  
High Quality ◽  
Content Type ◽  
World Class ◽  
Potential Factors ◽  
Cable Company

Purpose – The importance of partnerships to organizational success has increased considerably the past decennia and many organizations strive at creating high-performance partnerships (HPPs). For this to happen, organizations in the partnerships have to be of high quality and their collaborations should be world-class. Whereas the factors that create high-performance organizations (HPO) are by now reasonably well established, the HPP factors are still unclear. The purpose of this paper is to develop a scale for measuring the factors of importance for creating and maintaining HPPs, and relates these factors to the factors of the HPO framework and to the success of the partnership. Design/methodology/approach – During a literature study ten potential factors of importance for creating and maintaining HPPs were identified. These potential factors were put in a questionnaire, together with the factors that create the HPO and the factor that measures the success of the partnership. This questionnaire was administered to a cable company, which was working on becoming an HPO, and four of its main suppliers. The data were subjected to a factor analysis which yielded a HPP framework consisting of three factors and 19 underlying characteristics. In addition, these HPP factors were put in a regression analysis with the factors of the HPO framework and the success of the partnership factor. Findings – The research results show a strong relationship between three HPP factors, the five HPO factors, and the success of a partnership factor. Research limitations/implications – This research adds to the literature by extending the concept of HPOs to the value chain these HPOs operate in. Thus the research into the factors of successful partnerships has been brought forward. The practical benefit of the research is that organizations can use the HPP factors to increase the quality of the partnerships they have with their suppliers and customers. Originality/value – There is much literature on partnerships but not so much on partnerships between organizations which strive to become a HPOs, and in the process need to create partnership of high quality.

scholarly journals DEVELOPMENT AND VALIDATION OF REVERSE PHASE-HIGH-PERFORMANCE LIQUID CHROMATOGRAPHY TECHNIQUE FOR THE CONCOMITANT ASSESSMENT OF OMEPRAZOLE AND PIPERINE IN BULK FORM

2018 ◽  
Vol 11 ◽  
Author(s):  
Susithra E ◽  
Pavani Ch
Keyword(s):  
High Performance Liquid Chromatography ◽  
Liquid Chromatography ◽  
High Performance ◽  
Correlation Coefficients ◽  
Literature Study ◽  
Uv Detector ◽  
Reverse Phase ◽  
Rp Hplc ◽  
Relative Standard ◽  
Double Beam

Objective: The immense literature study was carried out and disclosed that here no method arrived for the concomitant assessment of omeprazole and piperine in bulk form by using RP-HPLC. Hence, an effort was assembled to arise a easy, specific, precise, reliable, linear, rapid, and validated reverse phase-high-performance liquid chromatography (RP-HPLC) technique for the simultaneous assessment of omeprazole and piperine in bulk form.Methods: The chromatographic analysis of omeprazole and piperine was performed using a RP-HPLC (WATERS) provided with autosampler and ultraviolet (UV) detector with the software of EMPOWER Version 2. The chosen conditions were isocratic separation with two mobile phase composed of acetonitrile:buffer (phosphate buffer: pH 6.5 ± 0.1) (55:45). Detection was carried out using UV/visible double-beam spectrophotometer at 320 nm. The method was validated as per the ICH guidelines.Results: The retention time for omeprazole and piperine by proposed HPLC method was found to be 2.767 and 4.029 min, respectively. The correlation coefficients are 0.999. The developed chromatographic method was found to be accurate with recovery 99.2–99.8% and was found within the acceptance criteria (i.e., 98.0–102.0%) with acceptable % relative standard deviation of not >2% at each level.Conclusion: Thus, the proposed HPLC procedure for the concomitant assessment of omeprazole and piperine was accurate, precise, linear, robust, simple, and economic. 

Comparative Analysis of Steel Slag Characteristics and Treatment Process

2013 ◽  
Vol 834-836 ◽  
pp. 378-384 ◽  
Author(s):  
Jie Long Liao ◽  
Zhao Hui Zhang ◽  
Jian Tao Ju ◽  
Fu Cai Zhao
Keyword(s):  
High Performance ◽  
Treatment Process ◽  
High Performance Concrete ◽  
Morphological Changes ◽  
Steel Slag ◽  
Free Calcium ◽  
Treatment Technology ◽  
Slag Treatment ◽  
Lower Temperature ◽  
Slag Processing

Steel slag is hydraulic cementing material, which is mainly applicable approach to the production of cement, admixture of high performance concrete, road engineering. But as a result of hydration expansion of the free calcium oxide and free magnesium oxide and dicalcium silicate morphological changes which is contained in slag cause poor stability of steel slag used in engineering, the steel slag utilization is very low. Therefore, the key technology of steel slag treatment process is to improve the stability of steel slag. Steel slag is alkaline slag, with lower temperature, the viscosity increases sharply, the liquidity variation, it is one of the important factors affect the steel slag processing, According to the need for different liquidity of steel slag to choose the corresponding steel slag treatment technology. Tank-type hot disintegrating, Rotary cylinder technology processing available to small particle size, good steel slag separation, active promotion of slags, conducive to the comprehensive utilization of steel slag.

scholarly journals Structural and Chemical Characterization of Silica Spheres before and after Modification by Silanization for Trypsin Immobilization

2017 ◽  
Vol 2017 ◽  
pp. 1-10
Author(s):  
Eduardo F. Barbosa ◽  
Luciano P. Silva
Keyword(s):  
High Performance ◽  
Morphological Changes ◽  
Chemical Characterization ◽  
Reversed Phase ◽  
Silica Particles ◽  
Selective Hydrolysis ◽  
Silica Surfaces ◽  
Immobilized Trypsin ◽  
Before And After ◽  
Silanized Silica

In the last decades, silica particles of a variety of sizes and shapes have been characterized and chemically modified for several applications, from chromatographic separation to dental supplies. The present study proposes the use of aminopropyl triethoxysilane (APTS) silanized silica particles to immobilize the proteolytic enzyme trypsin for the development of a bioreactor. The major advantage of the process is that it enables the polypeptides hydrolysis interruption simply by removing the silica particles from the reaction bottle. Silanized silica surfaces showed significant morphological changes at micro- and nanoscale level. Chemical characterization showed changes in elemental composition, chemical environment, and thermal degradation. Their application as supports for trypsin immobilization showed high immobilization efficiency at reduced immobilization times, combined with more acidic conditions. Indirect immobilization quantification by reversed-phase ultrafast high performance liquid chromatography proved to be a suitable approach due to its high linearity and sensitivity. Immobilized trypsin activities on nonmodified and silanized silica showed promising features (e.g., selective hydrolysis) for applications in proteins/peptides primary structure elucidation for proteomics. Silanized silica system produced some preferential targeting peptides, probably due to the hydrophobicity of the nanoenvironment conditioned by silanization.

Sign in / Sign up

Export Citation Format

Share Document