다중혈관 관상동맥 환자에서 y-문합을 이용하여 양쪽 내흉동맥만을 사용한 우회술의 조기 성적

How has Japan become a major economic power, a world leader in the automotive and electronics industries? What is the secret of their success? The consensus has been that, though the Japanese are not particularly innovative, they are exceptionally skilful at imitation, at improving products that already exist. But now two leading Japanese business experts, Ikujiro Nonaka and Hiro Takeuchi, turn this conventional wisdom on its head: Japanese firms are successful, they contend, precisely because they are innovative, because they create new knowledge and use it to produce successful products and technologies. Examining case studies drawn from such firms as Honda, Canon, Matsushita, NEC, 3M, GE, and the U.S. Marines, this book reveals how Japanese companies translate tacit to explicit knowledge and use it to produce new processes, products, and services.

The knowledge-creating company : how Japanese companies create the dynamics of innovation

The Social Psychology of Organizations.

Biocomposites reinforced with natural fibers: 2000–2010

Recently, there has been a rapid growth in research and innovation in the natural fibre composite (NFC) area. Interest is warranted due to the advantages of these materials compared to others, such as synthetic fibre composites, including low environmental impact and low cost and support their potential across a wide range of applications. Much effort has gone into increasing their mechanical performance to extend the capabilities and applications of this group of materials. This review aims to provide an overview of the factors that affect the mechanical performance of NFCs and details achievements made with them.

A review of recent developments in natural fibre composites and their mechanical performance

In this current research article, the structural elasto-mechanical and thermal properties of cubic perovskites XCoO3 (X = Nd, Pr) have been studied theoretically under different pressures. The structure is optimized and calculated optimized data is in well agreement of available literature. All these calculations are performed by considering Perdew Burke Ernzerhof Generalized Gradient Approximation type exchange and correlation functional within Wien2k-code. The second order cubic independent elastic constants C11, C12 and C44 are computed by using this optimized data. The dynamical stability criteria is checked by computed constants and used to find the elastic moduli; shear, Young's and Bulk modulus. The other mechanical properties like Poisson's ratio, anisotropic factor, Pugh's ratio, shear constant, Cauchy pressure, Lame's constants, Kleinmann parameter are quantified and discussed. The results portray the ductility of XCoO3 (X = Nd, Pr) perovskites and utility in high temperature devices. 

Effect of pressure on structural, elastic and mechanical properties of cubic perovskites XCoO3 (X = Nd, Pr) from first-principles investigations

Objective: This study was conducted to investigate the phytochemical contents, the antioxidant and antiproliferative properties of 80% methanol, ethanol and aqueous extracts of Sphagnum cuspidatum subsp. subrecurvum, Sphagnum cuspidatulum, Sphagnum junghuhniannum, Pogonatum cirratum subsp. fuscatum and Pogonatum cirratum subsp. macrophyllum. Methods: The total phenolic and total flavonoid contents were analysed using Folin-Ciocalteu and aluminium chloride colorimetric methods. The antioxidant properties were evaluated by three different assays, namely, ferric reducing/antioxidant power (FRAP), ABTS and DPPH free radical scavenging assays. MTT assay was used to study the antiproliferative properties against selected cancer cell lines. Results: The results showed that the aqueous and ethanol extracts of S. cuspidatum subsp. Subrecurvum has the highest total phenolic and total flavonoid content with the values of 5.42 ± 1.95 mg gallic acid equivalent per g of dry sample and 2.12 ± 0.02 mg catechin equivalent per g of dry sample, respectively. The 80% methanol extracts of S. junghuhnianum has the lowest total phenolic and total flavonoid content with the values of 0.80 ± 0.12 mg gallic acid equivalent per g of dry sample and 0.03 ± 0.02 mg catechin equivalent per g of dry sample, respectively. None of the extracts displayed IC 50 value (concentration that inhibits 50% of free radical) at concentration tested. The 80% methanol extracts of P. cirratum subsp. Fuscatum induced antiproliferative activity against CaOV 3 Conclusion: Results obtained indicated that the selected mosses contained considerable amount of phenolics and flavonoids which contribute to antioxidant properties. P. cirratum subsp. Fuscastum and S. cuspidatulum have the potential to be used in pharmaceutical industry due to the ability of these two species to induce antiproliferative activity against CaOV (ovarian carcinoma) cell line whereas S. cuspidatulum induced antiproliferative activity against HepG2 (liver cancer) cell line. None of the extracts induce antiproliferative activity against MDA-MB-231 (non-hormone dependent breast cancer) cell line.

PHYTOCHEMICALS, ANTIOXIDANT AND ANTIPROLIFERATIVE PROPERTIES OF FIVE MOSS SPECIES FROM SABAH, MALAYSIA Original Article

Palm kernel shell (PKS) was incorporated into natural rubber composites at loadings ranging from 0 to 20 phr using a laboratory-size two-roll mill. A soil burial study of the PKS-filled NR composites as a function of filler loading and silane coupling agent incorporation was then conducted over a period of six months. The degraded composites were evaluated by means of tensile testing. To study the degradation of the composites after soil burial, their morphological properties were observed by scanning electron microscopy. Prior to the soil burial tests, as the PKS filler loading increased, the tensile strength and elongation at break of the composites both with and without the silane coupling agent decreased, while the tensile moduli (M100 and M300) increased. At identical filler loading values, the NR/PKS composites with the incorporated silane coupling agent exhibited better tensile properties than the NR/PKS composites without the silane. Following the soil burial tests, the tensile strength, elongation at break, and the tensile moduli (M100 and M300) all decreased because of microbial attacks on the composites. The addition of silane enhanced the retention of the tensile properties of the NR/PKS composites after soil burial because of the improved adhesion at the filler-rubber matrix interface.

https://ojs.cnr.ncsu.edu/index.php/BioRes/article/download/BioRes_11_4_8686_Daud_Soil_Burial_Palm_Kernel/4747

Soil Burial Study of Palm Kernel Shell-Filled Natural Rubber Composites: The Effect of Filler Loading and Presence of Silane Coupling Agent

Oil palm (Elaeis guineensis) ash is defined as the waste generated after the combustion of oil palm biomass. Malaysia is one of the world’s largest producers and exporter of palm oil in the world, and there is approximately 4 million tonnes of oil palm ash generated annually. It is estimated that the amount of oil palm ash will keep increasing due to the high demand for palm oil globally. Normally, oil palm ash is disposed without any beneficial economic return value. The awareness of this environmental crisis has increased significantly over the past few years. With the evolution of ash utilization strategies, interest in oil palm ash in various research fields has grown. Through the effort of researchers and information available, the properties of the resulting materials are affected by the percentage of substitution and particle size of the oil palm ash. The major challenges in utilizing oil palm ash are discussed in this paper, as are the beneficial effects, which can include reducing the negative environmental impact and the product cost. Although the recycling of oil palm ash is still a new focus of interest, the main thrust of waste management in Malaysia will continue to focus on this kind of research and will attempt to solve the problem of disposal of the ash as well.

https://ojs.cnr.ncsu.edu/index.php/BioRes/article/download/BioRes_09_4__Ooi_Review_Recycling_Ash_Elaeis_Byproduct/3169

Abu Bakar

Papers

Effect of pressure on structural, elastic and mechanical properties of cubic perovskites XCoO3 (X = Nd, Pr) from first-principles investigations

PHYTOCHEMICALS, ANTIOXIDANT AND ANTIPROLIFERATIVE PROPERTIES OF FIVE MOSS SPECIES FROM SABAH, MALAYSIA Original Article

Soil Burial Study of Palm Kernel Shell-Filled Natural Rubber Composites: The Effect of Filler Loading and Presence of Silane Coupling Agent

A Review on Recycling Ash Derived from Elaeis guineensis By-product

The Effect of Banana Leaves Lamination on the Mechanical Properties of Particle Board Panel