47,609 research outputs found
Gaya belajar pelajar tingkatan lima aliran perdagangan di lima buah sekolah menengah teknik : suatu kajian
Kajian ini mengenal pasti gaya belajar Visual, Auditori dan Kinestetik pelajar tingkatan lima aliran perdagangan di lima buah sekolah menengah teknik. Objektif utama kajian ini adalah untuk mengenal pasti peratus setiap kecenderungan gaya belajar di setiap sekolah yang dikaji. Satu ratus lima puluh orang pelajar telah dijadikan responden kajian. Kajian ini adalah berbentuk deskriptif dan instrumen pengumpulan data yang digunakan adalah borang soal selidik yang telah diubahsuai dari Learning Style Inventory. Data dianalisis menggunakan Statistical Package for Social Sciences (SPSS) versi 11.5 bagi mendapatkan peratus, min, sisihan piawai serta mengenal pasti sekiranya terdapat perbezaan yang signifikan setiap skor gaya belajar di kalangan sekolah yang dikaji. Dapatan kajian menunjukkan peratus kecenderungan gaya pelajar paling tinggi ialah gaya belajar Auditori diikuti dengan gaya belajar Kinestetik dan Visual
Sustainable fibre for sustainable fashion supply chains: where the journey to sustainability begins
Adopting a sustainable business model is an essential element of gaining competitive advantage. Specifically, the management of fashion and textile supply chains characterized by geographical extension requires paying particular attention to environmental and social sustainability. Following an analysis of the literature on sustainable supply chains in the fashion and textile industries, this qualitatively based research examines – from a supply chain perspective – the sustainability initiatives implemented by a yarn and garment producer through a single case study. Subsequently, the classification of potential sustainability initiatives is presented. From this investigation, several good practices for sustainable fashion supply chains can be identified, providing a reference point for similar companies. Keywords: sustainable fashion supply chain, sustainable textiles, closed loop supply chai
HyperSpectral Imaging based approach for monitoring of micro-plastics from marine environment
The possibility to develop a sensor based procedure in order to monitor plastic presence in the marine environment was explored in this work. More in detail, this study was addressed to detect and to recognize different types of microplastics coming from sampling in different sea areas adopting a new approach, based on HyperSpectral Imaging (HSI) sensors. Moreover, a morphological and morphometrical particle characterization was carried by digital image processing. Morphological and morphometrical parameters, combined with hyperspectral imaging information, give a full characterization of each investigated particle, concurring to explain all the transportation, alteration and degradation phenomena suffered by each different polymer particle.
Obtained results can represent an important starting point to develop, implement and set up monitor strategies to characterize marine microplastics. Moreover, the procedure developed in this work is fast, not expensive and reliable, making its utilization very profitable
Sustainability evaluation of high value-added products
In this report the authors present a brief overview of the methods that are presently in use for evaluating sustainability. They discuss more deeply the pros and cons of the various methods, with a strong focus on the LCA (Life Cycle Analysis) method. Given is an overview of the available literature on sustainability of high added-value products and present the main conclusions from this literature
Airborne chemical sensing with mobile robots
Airborne chemical sensing with mobile robots has been an active research areasince the beginning of the 1990s. This article presents a review of research work in this field,including gas distribution mapping, trail guidance, and the different subtasks of gas sourcelocalisation. Due to the difficulty of modelling gas distribution in a real world environmentwith currently available simulation techniques, we focus largely on experimental work and donot consider publications that are purely based on simulations
Characterization of Microbial Communities Associated with Ceramic Raw Materials as Potential Contributors for the Improvement of Ceramic Rheological Properties
Technical ceramics are being widely employed in the electric power, medical and engineering
industries because of their thermal and mechanical properties, as well as their high resistance qualities.
The manufacture of technical ceramic components involves complex processes, including milling
and stirring of raw materials in aqueous solutions, spray drying and dry pressing. In general, the
spray-dried powders exhibit an important degree of variability in their performance when subjected
to dry-pressing, which affects the efficiency of the manufacturing process. Commercial additives, such
as deflocculants, biocides, antifoam agents, binders, lubricants and plasticizers are thus applied to
ceramic slips. Several bacterial and fungal species naturally occurring in ceramic raw materials, such
as Sphingomonas, Aspergillus and Aureobasidium, are known to produce exopolysaccharides. These
extracellular polymeric substances (EPS) may confer unique and potentially interesting properties
on ceramic slips, including viscosity control, gelation, and flocculation. In this study, the microbial
communities present in clay raw materials were identified by both culture methods and DNA-based
analyses to select potential EPS producers based on the scientific literature for further assays based
on the use of EPS for enhancing the performance of technical ceramics. Potential exopolysaccharide
producers were identified in all samples, such as Sphingomonas sp., Pseudomonas xanthomarina,
P. stutzeri, P. koreensis, Acinetobacter lwoffi, Bacillus altitudinis and Micrococcus luteus, among bacteria.
Five fungi (Penicillium citrinum, Aspergillus niger, Fusarium oxysporum, Acremonium persicinum and
Rhodotorula mucilaginosa) were also identified as potential EPS producers.Fundação para a Ciência e a Tecnologia-EXPL/CTM-CER/0637/201
- …