Design of modular fixtures using a 3D-modelling approach

The need for improved productivity and reduced time to market has been increased significantly in manufacturing processes in recent decades. There are many factors that play a role in providing manufacturing processes with more productivity. One is the use of modular fixtures (MFs). MFs have brought many benefits to manufacturing industries including reduced costs and times of production. An MF can be defined as a complete system that consist different elements for effectively and securely holding the workpiece in place for performing various machining operations. Generally an MF is made by assembling a number of fixture elements in a feasible sequence that is properly determined. Traditionally, the most common method of determination of fixture elements and assembly sequences are making use of 2D drawings and physical models. Obviously these are not efficient methods in the world of advanced manufacturing technologies and there is a vital need for developing more efficient methods. A solution to this is developing a CAD-based 3D-modelling and simulation system to determine the types and of feature elements and the sequence of assembly. Such a system can help fixture designers find the proper MF designs by defining the relationships between fixture elements and workpieces. Designing MFs and fixture elements is a very complex and time-consuming task even by making use of CAD software. A methodology has been developed to simplify this task by determining fixture elements and assembly sequences in a 3D-modelling environment. A fixture elements database is established and the fixture elements are divided into different categories depending on geometries and functions. Currently, MF systems can be constructed from standard MF elements. These elements are pre-manufactured components that include base-plates, clamps, and locators; and they can be re-used after disassembly. These can later be used for other workpieces within a specified range of sizes and shapes. In order to use these elements effectively, the CAD environment is exploited with developing a database which contains 3D models of standard MF elements. For most workpieces standard MF elements can be extracted directly from the developed database. However, for some workpieces with non-conventional geometries or shapes customised fixture elements should be designed in a 3D CAD environment. A modelling approach is used to find the appropriate MF design that suits the machining processes in need. To do so many parameters are taken into consideration including the number of workpieces to be machined; type of machining operation; locating method; clamping mechanism; and so on. The methodology developed for MF design has been implemented in a 3D modelling environment by making use of a powerful 3D modelling software, SolidWorks. It makes use of a database which contains 3D models for standard fixture elements. This database is divided into three main categories and each category is divided into different sub-categories depending on the type and function of the MF elements. SolidWorks software provides an excellent 3D environment that can be utilised to model fixture elements and determine assembly processes. This is accomplished by applying mating relationships after considering workpiece setup and fixture elements to achieve the optimum MF assembly design. This paper explains the methodology developed for semi-automated MF design. A case study has been presented to show the validity of the methodology proposed

A Year of Hijacking of Budgets by the Elite, Bypassing Public Welfare: End of Year Notes and Reflections by SEKNAS FITRA on Budget Year 2011

2011 was a year of budget hijacking by Indonesia's political and bureaucratic elite to the detriment of public welfare. An important factor at play in this situation was increasing “budget mafia” activity, evident in corruption cases within the Ministries of Youth & Sport and Labor & Transmigration; and in confirmation of charges against members of the Budget Committee (Banggar) of the House of Representatives (DPR) as accomplices in those cases. This turn of events confirms that Banggar has become a springboard for budget mafia activity. And, this year, hijacking of budgets has taken place in broad daylight with funds from the public purse being openly squandered on activities of benefit to political and bureaucratic leaders. Proposed construction of a new DPR building has a bad smell about it; purchase of a Presidential aircraft makes no sense; burdens of debt weigh more heavily on citizens; and official travel votes have become like feeding troughs for bureaucrats. All of this has amounted to nothing less than a hijacking of the State budget acted out in full public view. Hijacking of Indonesia's budgets continues because of Indonesia's weak law enforcement regime and because budget processes remain closed. Thus, in comparison to the amount spent on corruption eradication, the value of embezzled assets returned to the public purse is modest. The overall situation was made worse by the predilection of public institutions—especially ministries, agencies and political parties—not to be open about budgetary information. This derailing of budgetary funds has had implications for expenditure on education and health—both of which continued to be ineffective. Although government has managed to spend 20% of budgetary resources on education, education budgets have, at the same time, become a dumping ground for all sorts of activities. Moreover, at the central level, education funding is dispersed across 19 ministries and agencies and almost half of it is being appropriated for payment of salaries. Government is also not meeting its legal obligation to spend 5% of budgetary resources on health. It is no surprise, therefore, that Indonesia's Human Development Index (HDI)—which encompasses education and health—declined in 2011. The elite's hijacking of budgets has also led to neglect of public welfare in regions. A principal cause of this has been distortions of the system for fiscal transfers from the central government to regions (known as dana perimbangan). Those distortions have impacted badly on regional budgetary processes. Indeed, it is the fiscal transfers system itself that is acting as a catalyst for increased civil service spending in regions and for promotion of even more fiscal imbalance among regions. Around half of Indonesia's sub-national (regional) governments are appropriating more than 50% of their budgets to fund civil service costs. This situation was made worse by increased levels of misappropriation of regional funds—evident from national Audit Board reports. FITRA's projections and recommendations for 2012 reflect the assessment that budgets for 2012 are unlikely to be very different to those of 2011. Budget processes are still on a business-as-usual footing. Hijacking of budgets by the elite and neglect of public welfare will continue unless government completely revamps current pro-“rent-seeking” budgetary processes. And, as the next general election approaches, budget mafias will peddle their wares even more actively as they become players in political contests. According to FITRA's projections, State budget funding of civil service costs will continue to blow out in 2012 without any improvement of service provided or any diminution in the level of misappropriated funds. 2012 State funding for education will continue to resemble a dumping ground for sundry activities. The legal requirement to spend 5% of budgetary resources on health will, yet again, not be met. And national Audit Board reporting will continue to be little more than an annual ritual that cannot be counted on to improve the quality of budgetary spending. To put a stop to budget mafia operations, budget processes need to be totally revamped. Above all else, budgetary processes need to be open. To achieve that, the Law on State Finances needs to be revised to ensure in particular that it contains specific provisions fleshing out the Constitutional mandate that State budgets “shall be implemented in an open and accountable manner in order to best attain the prosperity of the people”. In addition, corruption eradication efforts should focus on the return of State assets to the public purse by those found guilty of embezzling them. Both the President and the DPR should become agents for change—to make budgets more efficient—and should refrain from deriving personal benefit from State-financed facilities. Revision of the regional fiscal transfers system must also be a priority. That system should squarely focus on realizing fundamental civic rights by reducing per capita fiscal inequalities among regions. The system's policy framework should therefore facilitate more efficient spending on regional civil services and promote greater prosperity for the people

Behind the Glitz of the 2010 Budget

At the end of every year, it is important to reflect upon and evaluate the quality of national budget policies. The National Secretariat of the Indonesian Forum for Budget Transparency (Seknas FITRA), together with its network of budget advocacy units across Indonesia, has consistently provided annual reports on budget performance. Such reports are an important part of its budget transparency work program and its effort to realize popular sovereignty over national budgets 2010 was the first year of President Susilo Bambang Yudoyono (SBY)'s second term of office following his re-election in 2009. In this second term, SBY should be able to be more resolute in his espousal of good budget policies and should not accord any priority to maintaining his political image. The principal emphases in the 2010 State budget (APBN 2010) were that it should promote “national economic recovery and boost community welfare”. But all that turned out to be mere rhetoric. The reality was that the budget was further removed than ever from the mandate of Article 23 of the Consititution that national budgets “shall be implemented in an open and accountable manner in order to best attain the prosperity of the people”. Instead of being used to promote the public interest, 40.7% of the 2010 APBN was consumed by routine expenditure on the bureaucracy and top echelons of the civil service. Furthermore, Rp 162.6 trillion of that 40.7% was spent on civil service costs, Rp 19.5 trillion on official travel and Rp 153.6 trillion on payment of interest on loans or loan repayments

A systematic review on healthcare financing in Singapore

Background: Healthcare financing has been on the global agenda for many countries to elevate the health status of the citizens at the same time aim for a lean and sustainable health system. Singapore in particular has demonstrated progressive leaps in health care financing through various reforms. Materials and Methods: A systematic review of articles related to health care financing in Singapore was compiled using a series of keyword search in various databases (Medline, CINAHL, and PubMed). Studies that were conducted from 1981 to 2015, written in English and used either a quantitative or qualitative design that focus on health care reform in Singapore were included in this study. Result: Most of the studies revealed that the most innovative factor in the health care financing in Singapore was the structure and the comprehensive health insurance systems that are in place but it was not necessarily deemed beneficial or affordable to its citizens. The systematic review yielded over 125 results, only 7 of which were relevant to this study after examining in full text. A purposeful approach was then pursued. Snowballing on bibliographic references and undertaking key author and grey-literature searches proved as an effective complimentary approach to the original review and was reverted to in addition to the original search. This method brought the full-text results up to 5. Conclusion: Healthcare financing have a direct influence on the citizens of Singapore and although comprehensive, it also has deficiencies and issues that still need to be addressed

Spatial distribution of carbon dynamics and nutrient enrichment capacity in different layers and tree tissues of Castanopsis eyeri natural forest ecosystem

Forest ecosystem carbon (C) storage primarily includes vegetation layers C storage, litter C storage, and soil C storage. The precise assessment of forest ecosystem C storage is a major concern that has drawn widespread attention in global climate change worldwide. This study explored the C storage of different layers of the forest ecosystem and the nutrient enrichment capacity of the vegetation layer to the soil in the Castanopsis eyeri natural forest ecosystem (CEF) present in the northeastern Hunan province, central China. The direct field measurements were used for the estimations. Results illustrate that trunk biomass distribution was 48.42% and 62.32% in younger and over-mature trees, respectively. The combined biomass of the understory shrub, herb, and litter layers was 10.46 t·hm−2, accounting for only 2.72% of the total forest biomass. On average, C content increased with the tree age increment. The C content of tree, shrub, and herb layers was 45.68%, 43.08%, and 35.76%, respectively. Litter C content was higher in the undecomposed litter (44.07 %). Soil C content continually decreased as the soil depth increased, and almost half of soil C was stored in the upper soil layer. Total C stored in CEF was 329.70 t·hm−2 and it follows the order: tree layer > soil layer > litter layer > shrub layer > herb layer, with C storage distribution of 51.07%, 47.80%, 0.78%, 0.25%, and 0.10%, respectively. Macronutrient enrichment capacity from vegetation layers to soil was highest in the herb layer and lowest in the tree layer, whereas no consistent patterns were observed for trace elements. This study will help understand the production mechanism and ecological process of the C. eyeri natural forest ecosystem and provide the basics for future research on climate mitigation, nutrient cycling, and energy exchange in developing and utilizing sub-tropical vegetationThis research was financially supported by research funding from Central South University of Forestry and Technology and the Hunan province finance department (No.70702-45200003

Effect of organic tomato (Lycopersicon esculentum) extract on the genotoxicity of doxorubicin in the Drosophila wing spot test

The consumption of organic tomatoes (ORTs) reduces the risk of harmful effects to humans and the environment caused by exposure to toxic agrochemicals. In this study, we used the somatic mutation and recombination test (SMART) of wing spots in Drosophila melanogaster to evaluate the genotoxicity of ORT and the effect of cotreatment with ORT on the genotoxicity of Doxorubicin® (DXR, a cancer chemotherapeutic agent) that is mediated by free radical formation. Standard (ST) cross larvae were treated chronically with solutions containing 25%, 50% or 100% of an aqueous extract of ORT, in the absence and presence of DXR (0.125 mg/mL), and the number of mutant spots on the wings of emergent flies was counted. ORT alone was not genotoxic but enhanced the toxicity of DXR when administered concomitantly with DXR. The ORT-enhanced frequency of spots induced by DXR may have resulted from the interaction of ORT with the enzymatic systems that catalyze the metabolic detoxification of this drug

Causes, Timing, and Impact of Dual Antiplatelet Therapy Interruption for Surgery (from the Patterns of Non-adherence to Anti-platelet Regimens In Stented Patients Registry).

Temporary interruption of dual antiplatelet therapy (DAPT) is not infrequently required in patients undergoing percutaneous coronary intervention (PCI). We sought to describe the procedures and outcomes associated with DAPT interruption in patients treated with DAPT following successful PCI from the Patterns of non-adherence to anti-platelet regimens in stented patients registry (n = 5018). DAPT interruption was prespecified as physician recommended cessation for <14 days. Of the study cohort, 490 patients (9.8%) experienced 594 DAPT interruptions over 2 years following PCI. Only 1 antiplatelet agent was interrupted in 57.2% cases and interruption was frequently recommended by noncardiologists (51.3%). Where type of surgery was reported, majority of DAPT interruptions occurred for minor surgery (68.4% vs 31.6%) and a similar cessation pattern of single versus dual antiplatelet cessation was observed regardless of minor or major surgery. Subsequent to DAPT interruption, 12 patients (2.4%) experienced 1 thrombotic event each, of which 5 (1.0%) occurred during the interruption period. All events occurred in patients who either stopped both agents (8 of 12) or clopidogrel-only (4 of 12), with no events occurring due to aspirin cessation alone. In conclusion, in the Patterns of Non-adherence to Anti-platelet Regiments in Stented Patients registry, 1 in 10 patients were recommended DAPT interruption for surgery within 2 years of PCI. Interruption was more common for a single agent rather than both antiplatelet agents regardless of severity of surgery, and was frequently recommended by noncardiologists. Only 1% of patients with DAPT interruption experienced a subsequent thrombotic event during the interruption period, which mainly occurred in patients stopping both antiplatelet agents

Graphene oxide incorporated polyether sulfone nanocomposite antifouling ultrafiltration membranes with enhanced hydrophilicity

In this study, the polyether sulfone (PES) based membranes containing various concentrations of graphene oxide (GO), polyvinylpyrrolidone (PVP), and polyethylene glycol (PEG) were synthesized via the phase immersion method. This study aims to evaluate the effect of GO addition on the structural properties and performance of the membranes. The membranes were analyzed by x-ray diffraction (XRD), scanning electron microscopy (SEM), and Fourier transforms infrared spectroscopy (FTIR). The FTIR-ATR spectra indicated the presence of hydroxyl and carboxylic acid groups on the surface of GO-incorporated membranes, which improved their dispersion in the polymeric matrix and hydrophilicity. The SEM analysis of the GO-containing PES membranes confirmed the formation of a well-defined finger-like porous structure presenting adequate water flux (95 l.m(-2).h(-1)) and salt rejection (72%) compared to the pristine PES membranes (46 l.m(-2).h(-1) and similar to 35%, respectively). In addition, the significantly large wettability and considerably improved antibacterial characteristic (against S. aureus and E. coli strains) of the GO-PES membranes are considered impressive features.National University of Sciences and Technology (NUST) Research Directorate; HEC; NRPU [6020]6020; Higher Education Commission, Pakistan, HEC; National University of Sciences and Technology, NUS