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1	我國上市公司季盈餘時間數列特性之研究鄭素鄉, ZHENG, SOU-XIANG Unknown Date (has links) 無論是投資人和債權人之投資與授信決策或企業內部之規劃與控制，在其決策模式中，會計盈餘常是一項重要因素。因此，檢查盈餘的時間數列特性不僅可瞭解盈餘產生過程的統計特性，並且可據以預測未來的盈餘，本論文之目的即在研究我國上市公司季盈餘時間數列特性，建立其時間數列模式。資料來源是利用台灣證券六易所上市公司財務資料簡報，搜集整理民國六十五年第三季至民國七十七年第三季計４１家上市公司之４９期季盈餘資料作為研究分析對象。利用BOX和JENKINS二人之時間數列分析，即所謂自我迴歸整合移動平均模式，替我國上市公司季盈餘建立時間數列模式。由於資料搜集之限制，無法進一步作預測比較分析。有關BOX-JENKINS 分析之計算，則利用教育部電子計算機中心所提供之套裝軟體SCA-UTS。研究結果發現：所認定４１個個別B-J 模式中，以自我迴歸模式及混合自我迴歸移動平均模式較多；此外，模式中包含季節性因素，顯示季報表之發佈也有其重要性。季節台灣盈餘會計 1976 1988 SEASON TAIWAN EARNINGS BOX JENKINS SCA-UTS
2	High Performance Steel for Percussive Drilling Åkerlund, Elin, Havo, Rebecka, Jonsson Åberg, Jakob, Österberg, Patrik, Fredriksson, Mikael January 2017 (has links) Atlas Copco Secoroc AB are searching after new bulk materials for drill heads that are used in percussive drilling in order to improve their strength and durability. The aim of this project is to assist Atlas Copco in this search and provide them with further information regarding material properties, alloying elements, suppliers, etc. A literary study was carried out in order to identify materials that had UTS and KIC more than or equal to 1700 MPa and 70 MPa*m1/2, respectively. Materials that fulfilled these criteria were T250 grade maraging steel, Cobalt free maraging steel, High cobalt maraging steel, 300 grade maraging steel, AerMet 100, AF1410, S53, M54, 300M, 4340M and PremoMet. These were categorized into maraging steels, high alloy secondary hardened steels, and low alloy steels, and were then further researched. The material with the highest combination of UTS and KIC was M54 followed by AerMet 100; while AF1410 had the highest KIC but a low UTS, and PremoMet had the highest UTS but a low KIC. Maraging steels and HASH steels have a similar price range, while low alloy steels are much cheaper. Bulk material drill head UTS KIC maraging steel high alloy secondary hardened steel low alloy steel Materials Chemistry Materialkemi
3	High Performance Steel for Percussive Drilling Åkerlund, Elin, Jonsson Åberg, Jakob, Österberg, Patrik, Havo, Rebecka, Fredriksson, Mikael January 2017 (has links) Atlas Copco Secoroc AB are searching after new bulk materials for drill heads that are used in percussive drilling in order to improve their strength and durability. The aim of this project is to assist Atlas Copco in this search and provide them with further information regarding material properties, alloying elements, suppliers, etc. A literary study was carried out in order to identify materials that had UTS and KIC more than or equal to 1700 MPa and 70 MPa*m^1/2, respectively. Materials that fulfilled these criteria were T250 grade maraging steel, Cobalt free maraging steel, High cobalt maraging steel, 300 grade maraging steel, AerMet 100, AF1410, S53, M54, 300M, 4340M and PremoMet. These were categorized into maraging steels, high alloy secondary hardened steels, and low alloy steels, and were then further researched. The material with the highest combination of UTS and KIC was M54 followed by AerMet 100; while AF1410 had the highest KIC but a low UTS, and PremoMet had the highest UTS but a low KIC. Maraging steels and HASH steels have a similar price range, while low alloy steels are much cheaper. Bulk material drill head UTS KIC maraging steel high alloy secondary hardened steel low alloy steel Materials Chemistry Materialkemi
4	The managerial performance of mutual funds : an empirical study Burrows, Tim January 2013 (has links) For as long as managed mutual funds have been in existence there has been a desire to accurately assess their relative performance against each other, and also their respective performance in relation to an appropriate stock market index. There has been a specific interest in whether the expensive, professionally managed mutual funds can justify their high cost with respect to low cost, simple index trackers by producing superior, post-cost performance, and this proposition is implicitly tested within this thesis. The aim of this thesis is to undertake an empirical assessment of the managerial performance of mutual funds utilising a three-stage DEA-SFA-DEA methodology which combines linear mathematical programming (DEA) and stochastic frontier analysis (SFA). Specifically, this thesis focuses on evaluating the managerial performance of UK domiciled open-ended investment companies (OEICs) and unit trusts (UTs) over a three year period from 1st January 2008 to 31st December 2010. Various DEA models are utilised including CCR, BCC and SBM DEA models with various orientations, and also versions of these DEA models which make use of the SORM procedure. These are used to carry out an initial evaluation of the managerial performance of the OEICs/UTs, before two of these DEA models are combined with SFA regression analysis in a three-stage DEA-SFA-DEA methodology to purge the influence of environmental factors and statistical noise, thus leading to a more robust evaluation of the true managerial performance of the OEICs/UTs under assessment. The results of this thesis extend support to the premise of the Efficient Market Hypothesis (EMH) that financial markets are information efficient , and thus it is not possible, given the information available when the investment is made, to consistently obtain returns in excess of the average market return on a risk-adjusted basis, and this thesis does so through the use of a novel approach. 332.63
5	High Performance Steel for Percussive Drilling Fredriksson, Mikael, Åkerlund, Elin, Åberg, Jakob, Österberg, Patrik, Havo, Rebecka January 2017 (has links) Atlas Copco Secoroc AB are searching after new bulk materials for drill heads that are used in percussive drilling in order to improve their strength and durability. The aim of this project is to assist Atlas Copco in this search and provide them with further information regarding material properties, alloying elements, suppliers, etc. A literary study was carried out in order to identify materials that had UTS and KIC more than or equal to 1700 MPa and 70 MPa*m^1/2, respectively. Materials that fulfilled these criteria were T250 grade maraging steel, Cobalt free maraging steel, High cobalt maraging steel, 300 grade maraging steel, AerMet 100, AF1410, S53, M54, 300M, 4340M and PremoMet. These were categorized into maraging steels, high alloy secondary hardened steels, and low alloy steels, and were then further researched. The material with the highest combination of UTS and KIC was M54 followed by AerMet 100; while AF1410 had the highest KIC but a low UTS, and PremoMet had the highest UTS but a low KIC. Maraging steels and HASH steels have a similar price range, while low alloy steels are much cheaper. Ultra high strength steel ultra high strength uhs maraging marageing secondary hardened low alloy steel alloy fracture toughness uts Metallurgy and Metallic Materials Metallurgi och metalliska material
6	A Comparative Analysis of the Biomechanics and Biochemistry of Cell-Derived and Cell-Remodeled Matrices: Implications for Wound Healing and Regenerative Medicine Ahlfors, Jan-Eric Wilhelm 03 May 2004 (has links) The purpose of this research was to study the synthesis and remodeling of extracellular matrix (ECM) by fibroblasts with special emphasis on the culture environment (media composition and initial ECM composition) and the resulting mechanical integrity of the ECM. This was investigated by culturing fibroblasts for 3 weeks in a variety of culture conditions consisting of collagen gels, fibrin gels, or media permissive to the self-production of ECM (Cell-Derived Matrix), and quantifying the mechanics of the resulting ECM. The mechanical characteristics were related to the biochemistry of the resulting ECM, notably in terms of collagen accumulation and collagen fibril diameters. The ultimate tensile strength (UTS) of the collagen gels and fibrin gels at the end of the 3-week period was 168.5 ± 43.1 kPa and 133.2 ± 10.6 kPa, respectively. The ultimate tensile strength of the cell-derived matrices was 223.2 ± 9 kPa, and up to 697.1 ± 36.1 kPa when cultured in a chemically-defined medium that was developed for the rapid growth of matrix in a more defined environment. Normalizing the strength to collagen density resulted in a UTS / Collagen Density in these groups of 6.4 ± 1.9 kPa/mg/cm3, 25.9 ± 2.4 kPa/mg/cm3, 14.5 ± 1.1 kPa/mg/cm3, and 40.0 ± 1.9 kPa/mg/cm3, respectively. Cells were synthetically more active when they produced their own matrix than when they were placed within gels. The resulting matrix was also significantly stronger when it was self-produced than when the cells rearranged the matrix within gels that corresponded to a significantly larger fraction of non-acid and pepsin extractable collagen. These studies indicate that cell-derived matrices have potential both as in vitro wound healing models and as soft connective tissue substitutes. tension failure strain mechanics fibroblasts regenerative medicine serum-free UTS proteoglycans thickness glycosaminoglycans extensibility collagen wound-healing model cell-remodeled matrix cell-derived matrix fibroblast-populated collagen gel biomechanical characterization fibrin gel strength chemically-defined medium growth factors tissue growth tissue regeneration total protein content human tissue formation biochemical characterization Extracellular matrix Fibroblasts Biomechanics Biochemistry Wound healing

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