A novel architecture for a reconfigurable micro machining cell

There is a growing demand for machine tools that are specifically designed for the manufacture of micro-scale components. Such machine tools are integrated into flexible micro-manufacturing systems. Design objectives for such tools include energy efficiency, small footprint and importantly flexibility, with the ability to easily reconfigure the manufacturing system in response to process requirements and product demands. Such systems find application in medical, photonics, automotive and electronic industries. In this paper, a new architecture for a reconfigurable micro manufacturing system is presented. The proposed architecture comprises a micro manufacturing cell with the key design feature being a hexagonal-base on which three tool heads can be attached to three of its sides. Each such machine-tool head, or processing module, is able to perform a different manufacturing process. These tool heads are interchangeable, enabling the cell to be configured to process a wide range of components with different materials, dimensions, tolerances and specification. Additional components of the cell include manipulation robots and an automated buffer unit. Such cells can be integrated into a manufacturing system via a modular conveyor belt to transfer parts from one cell to another and into assembly. A key consideration of the architecture is a control system that is also modular and reconfigurable; such that when new processing modules are introduced the control system is aware of the change and adjusts accordingly. Further to this coordination, issues between modules and machining cells are also considered. Other design considerations include work-piece holding and manipulation. This paper provides an overview of the architecture, the key design and implementation challenges as well as a high level operational performance assessment by means of a discrete event simulation model of the micro factory cell

Pengukuran Efisiensi Alokatif pada Usaha Pertanaman Kacang Tanah di Kecamatan Sambung Makmur, Kabupaten Banjar

The research aimed to examine allocative efficiency of available inputs orfactor of production utilization in peanut farming in the Sub-district of Sambung Makmur, the Dictrict of Banjar, South Kalimantan using a Cobb-Douglas production function approach. The estimation of Cobb-Douglas production function was, however, carried out by applying procedures of principal component regression instead of well-known OLS regression due to multicollinearity problems. The results revealed that all inputs significantly influenced peanut production. Nevertheles, some inputs such as chemical pesticides and hired labour had negative elasticity of production indicated that those were over-utilized and, therefore, not consistent with maximizing profit.There were perhaps increasing pest attacks in the observed planting time so that farmers needed more pesticides to employ. Besides, farmers need more hired labour to substitute shortage of family labor. From statistical test of allocative efficiency indeces showed that land and fertilizer were allocatively efficient, whereas seeds and family labor were not yet due to under-utilized. In order to attain maximizing profit, it was suggested to increase the use of seeds and family labor. Less utilization of family labor was in fact consistent with more utilization of hired labor because the latter was needed to substitute lack of the former

Penerapan Regresi Kuadrat Terkecil Berbatas pada Pendugaan Fungsi Produksi Cobb-Douglas

This research aimed to estimate and analyse Cobb-Doglas production function of paddy farming and to evaluate return to scale of production, as well as to apply least square regression restricted by constant return to scale (CRTS) assumption. The results of estimation and analysis by unrestricted least square regression was statistically unsatisfactory. Some factors of production i.e. chemical and organic fertilizer as well as chemical pesticide were not significant. Moreover, chemical pesticide had negative elasticity of production which was implied negative marginal product and, thereby, meaning that the factor of production was overutilized and had negative effect to paddy production. Introducing restriction of CRTS assumption to Cobb-Doglas production function had considerably improved the results in three things. Firstly, the existence of restriction was significant so that it was no doubt about the restriction. Secondly, all factors of production were exhibited statistically significant meaning that they had important influences to paddy production. Thirdly, the elasticity of production of all factors of production were positive and less than one. It implied that the utilizing of those factors of production were in the stage II of neoclassical production function where it was more favourable choice to operate the production operation in terms of profit maximization

Folding house

Nowadays there is massive use of concrete in construction industry. To overcome this, new construction techniques and material is adopted for good living standard. Folding house is a technique that considered all the factors like sufficient space for living, economy, environmental issues and living standard. . The tendency for the cost effective and quicker construction pushed the folded structures made in reinforced concrete, and led to the construction realized in wood, steel and other modern materials that eventually experienced expansion .In this project we are introducing a cost effective folding house. Keywords—folding house,cost effective and quicker constructio

Penerapan Regresi Kuadrat Terkecil Berbatas pada Pendugaan Fungsi Produksi Cobb-Douglas

This research aimed to estimate and analyse Cobb-Doglas production function of paddy farming and to evaluate return to scale of production, as well as to apply least square regression restricted by constant return to scale (CRTS) assumption. The results of estimation and analysis by unrestricted least square regression was statistically unsatisfactory. Some factors of production i.e. chemical and organic fertilizer as well as chemical pesticide were not significant. Moreover, chemical pesticide had negative elasticity of production which was implied negative marginal product and, thereby, meaning that the factor of production was overutilized and had negative effect to paddy production. Introducing restriction of CRTS assumption to Cobb-Doglas production function had considerably improved the results in three things. Firstly, the existence of restriction was significant so that it was no doubt about the restriction. Secondly, all factors of production were exhibited statistically significant meaning that they had important influences to paddy production. Thirdly, the elasticity of production of all factors of production were positive and less than one. It implied that the utilizing of those factors of production were in the stage II of neoclassical production function where it was more favourable choice to operate the production operation in terms of profit maximization

Analysis of Scholarly Communication on Phonology during 2000 - 2017: A Scientometric Study

The study is aimed to find out the authorship pattern and the collaboration trends in the field of phonology. In the study, Collaborative index, Degree of collaboration, Collaborative Coefficient, Relative growth rate and Doubling time these Scientometric indicators were used. The study found that the Degree of Collaboration is 0.5 which reveals the average relationship between singled authored papers and muli-authored papers. Collaboration Coefficient and Modified Collaboration Coefficient is less than 0.5, it means there were fewer trends of authors collaboration. But the study found slight growth from 1013 to 2015 and again decreased. As per the study Goswami, U was the first ranked author, Lingua was the first ranked journal and USA was the first ranked Country between 2000 and 2017

Analysis of Scholarly Communication on Phonology during 2000 - 2017: A Scientometric Study

The study is aimed to find out the authorship pattern and the collaboration trends in the field of phonology. In the study, Collaborative index, Degree of collaboration, Collaborative Coefficient, Relative growth rate and Doubling time these Scientometric indicators were used. The study found that the Degree of Collaboration is 0.5 which reveals the average relationship between singled authored papers and muli-authored papers. Collaboration Coefficient and Modified Collaboration Coefficient is less than 0.5, it means there were fewer trends of authors collaboration. But the study found slight growth from 1013 to 2015 and again decreased. As per the study Goswami, U was the first ranked author, Lingua was the first ranked journal and USA was the first ranked Country between 2000 and 2017

Colonial & Federal Portraits at Bowdoin College

Set in type at the Anthoensen Press ... designed by Leonard Baskin --Colophonhttps://digitalcommons.bowdoin.edu/art-museum-exhibition-catalogs/1013/thumbnail.jp

A pin in appendix within Amyand's hernia in a six-years-old boy: case report and review of literature

<p>Abstract</p> <p>Introduction</p> <p>Presence of vermiform appendix (non-inflamed or inflamed) in inguinal hernia is called Amyand's hernia in honor to surgeon C. Amyand who published the first case of perforated appendicitis within inguinal hernia in a boy caused by ingested pin. This presentation of foreign body Amyand's hernia appendicitis is very rare, and here we present such a case.</p> <p>Case presentation</p> <p>A 6-year-old boy, white Kosovar ethnicity, presented with right groin pain, swelling and redness. Two days before admission the patient was injured by football during a children game in the right lower abdomen and the next day he complained of pain in the right inguinal area.</p> <p>On admission patient had a painful non-reducible mass in the right inguinal region and cellulitis. Plain abdominal x-ray showed no fluid-air levels, but a metallic foreign body (pin) under right superior pubic ramus was apparent. With preoperative diagnosis of suspect incarcerated inguinal hernia with cellulitis the patient was operated on under general anaesthesia in December 2, 2006. Intraoperatively we found the inflamed vermiform appendix perforated by a pin in the hernial sac. Appendectomy and herniotomy were performed. The wound was primary closed, without any post-operative complications and follow up for the patient is three years long.</p> <p>Conclusion</p> <p>Foreign body (pin) Amyand's hernia appendicitis seems to be extremely rare, maybe once in a century (Amyand 1735, Hall 1886, and our case in 2006). In patients with clinical signs of incarcerated inguinal hernia, with locally inflammatory signs, but without signs of intestinal obstruction Amyand's hernia appendicitis in differential diagnosis must be considered. In our case, it is possible that the injury during the football game might have induced perforation of the vermiform appendix with the foreign body in it.</p

Selection of DNA nanoparticles with preferential binding to aggregated protein target.

High affinity and specificity are considered essential for affinity reagents and molecularly-targeted therapeutics, such as monoclonal antibodies. However, life's own molecular and cellular machinery consists of lower affinity, highly multivalent interactions that are metastable, but easily reversible or displaceable. With this inspiration, we have developed a DNA-based reagent platform that uses massive avidity to achieve stable, but reversible specific recognition of polyvalent targets. We have previously selected these DNA reagents, termed DeNAno, against various cells and now we demonstrate that DeNAno specific for protein targets can also be selected. DeNAno were selected against streptavidin-, rituximab- and bevacizumab-coated beads. Binding was stable for weeks and unaffected by the presence of soluble target proteins, yet readily competed by natural or synthetic ligands of the target proteins. Thus DeNAno particles are a novel biomolecular recognition agent whose orthogonal use of avidity over affinity results in uniquely stable yet reversible binding interactions