A novel model-checking approach for dose-response relationships

We propose a test for assessing nonlinear dose-response models based on a Crámer–von Mises statistic. We establish the asymptotic distribution of the test and demonstrate that the test can detect the local alternative converging to the null at the parametric rate [Formula: see text]. We provide a bootstrap resampling technique to calculate the critical values. It is observed that the test has good power performance in small sample sizes. We apply the proposed method to analyze 250 datasets from a pharmacologic study and conduct two small simulation experiments to explore the numerical performance of the proposed test and compare one commonly used test in practice.

Plum Tree Gums as Local Alternatives for Foreign Drilling Fluid Materials

A few years ago oil well drilling cost increased due to using modern technique such as equipment and materials that are used by specialist companies so studies and researches were required to decrease these costs. In this study we tried to find local alternatives for foreign drilling fluid materials that are aimed to decrease oil well drilling cost although the cost of drilling fluid materials reach to 30 % of total materials cost of drilling oil well. In the first part of this study seven local materials and it's tested under API Specification 13A for Drilling Fluids Materials were investigated. Plum Tree Gum was succeeded in this test among several other materials as drilling fluid materials. The second part of this study was a comparison between these local alternative and similar foreign materials for same sample to show physical and rheological properties. The third part of this study was tested this local alternative under different values temperature to show effect the temperature on physical and rheological properties of this local alternative. The results approved that; Plum Tree Gum, local alternative, can use as filtration control materials for water based drilling fluid. Also this local alternative increased viscosity as minimal for water based drilling fluids, So it can be used as part alternative for Bentonite to increase viscosity by increasing Yield point and decreasing solids concentration in drilling fluids so it has positive effect on Rig equipment’s and Pay-zone. Plum Tree Gum is Ore polymers (plant origin)

Assessment of the use of tropical peats as local alternative materials for the adsorption of Pb, Zn and Cd: An equilibrium study

Peat is an organic material that has been widely used as an efficient and low-cost adsorbent. As many studies tend to focus on temperate peats, there is a lack of knowledge about the adsorption mechanism of tropical peats. This paper investigates the use of two Brazilian peats (Cravinhos - C and Luis Antônio - LA) from the Mogi-Guaçu river basin for the adsorption of lead (Pb), zinc (Zn), and cadmium (Cd), in order to contribute to the use of local and easy access materials to remediate contaminated sites. The peats adsorbed a high percentage of cations, especially Pb cations (100.0-46.3%), with commercial peat C showing higher adsorption than peat LA. The removal order was Pb2+ > Cd2+ ≥ Zn2+ for C and Pb2+ > Zn2+ > Cd2+ for LA. The batch data for both peats and for all metals were better fit by the Langmuir isotherm, with adsorption capacities (qm) for Pb, Zn, and Cd of 37.3134, 29.0674 and 21.2890 mmol kg-1 in peat C and 21.7391, 14.2550 and 3.6460 mmol kg-1 in LA, respectively, values comparable to those of other peats and biosorbents. The studied peats are considered efficient, alternative and low-cost adsorptive materials for these metals. The proximity of peatlands to areas with high potential for contamination necessitates the use of local materials to reduce remediation costs.

KELAYAKAN USAHATANI TEMBAKAU VIRGINIA: STUDI KOMPARASI PADA PROSES PENGOVENAN DI KABUPATEN LOMBOK TIMUR

There are two methods of flue curing process used in virginia tobacco farmers in East Lombok, which are curing with fossil fuel and curing with local (alternative) fuels (candlenut shell, palm kernel shells, wood, and corn cobs). Now days, due to increasing fossil fuels price, farmer tend to use local fuels. The research objective was to compare the costs, income, and feasibility level of virginia tobacco farming on the use of various alternative fuels in the oven process in East Lombok Regency. The method used is descriptive survey method to 40 farmers. The cost of farming virginia tobacco using candlenut shell as fuel is Rp. 44,788,057/ha/planting season with an R/C ratio of 1.6 palm kernel shells of 45,081,109/ha/planting season with an R/C ratio of 1.5 wood of Rp. 49,498,452/ha/planting season with an R/C ratio of 1.4 and corn cobs of Rp. 39,184,196/ha/planting season with an R/C ratio of 1.8. The highest income is obtained from farmers who use corn cobs as fuel of Rp. 30,037,854/ha/planting season, the income of the farmers who use hazelnut shell and palm shell as fuel each is Rp. 25,938,788/ha/planting season and Rp. 23,757,891/ha/planting season. The lowest income using wood fuel is Rp. 16,883,748/ha/planting season. Because the R/C value is more than 1, it means that virginia tobacco farming using various alternative materials in the oven process in East Lombok Regency is feasible.

Approximations of the power functions for Wald, likelihood ratio, and score tests and their applications to linear and logistic regressions

Traditionally, asymptotic tests are studied and applied under local alternative. There exists a widespread opinion that the Wald, likelihood ratio, and score tests are asymptotically equivalent. We dispel this myth by showing that These tests have different statistical power in the presence of nuisance parameters. The local properties of the tests are described in terms of the first and second derivative evaluated at the null hypothesis. The comparison of the tests are illustrated with two popular regression models: linear regression with random predictor and logistic regression with binary covariate. We study the aberrant behavior of the tests when the distance between the null and alternative does not vanish with the sample size. We demonstrate that these tests have different asymptotic power. In particular, the score test is generally asymptotically biased but slightly superior for linear regression in a close neighborhood of the null. The power approximations are confirmed through simulations.

Utilization of Moringa Seed Flour as a coagulant, palm fiber, and activated charcoal in an effort to improve domestic wastewater

One local alternative that is available is the use of natural coagulants from the Moringa oleifera L. seed starch plant. Moringa seeds have antimicrobial properties that can reduce substances that should not be present in clean water so that they can purify water for clean water needs. However, the distinctive aroma of moringa is still felt, so it needs to be filtered using coconut shell charcoal and fibers . Research objectives: to determine the characteristics of domestic wastewater (pH, TSS, BOD, oil and fat) and after adding Moringa seeds as a coagulant and coconut shell charcoal and fibers as a filter media . This research was conducted in Nunleu Village-Kupang City and the NTT Provincial Health Laboratory. The method used is experiment and laboratory analysis . Phase I samples were analyzed in the laboratory to determine the characteristics of the initial water. Phase II of water purification experiments with treatment A: coagulant 150 mg / l + 10 cm thick activated charcoal + 10 cm palm thickness. Treatment B: coagulant 150 mg / l + fiber thickness 10 cm + activated charcoal thickness 10 cm. The results showed that the treatments (A and B) could reduce pH, BOD, TSS as well as oil and fat. The pH parameter has decreased tends to be acidic. TSS increased by 58.8% in Treatment (A) , but in treatment (B) there was a decrease of 15%, the TSS content still exceeds the quality standard for domestic waste set by the 2016 Ministerial Regulation, 30 mg/L.The BOD content decreased by 45.2% in treatment A while in treatment B there was a decrease of 58.3% . Furthermore, the oil and fat content was quite low, namely in treatment A there was a decrease of 45.2% while in treatment B there was a decrease of 58.3%.

Interrogating Social and Solidarity Economies Following Marxian Class Focused Approach: Evidence from India

We use a class-focused Marxian approach to examine non-capitalist firms within the Social and Solidarity Economy (SSE) sector in India and draw some theoretical conclusions from it. Cooperatives, labour supply contracts, farmer producer organisations, mutuals, peoples’ credit societies, local alternative currencies—all such initiatives are covered by the umbrella term SSE. This article focuses on generating some broad-based criteria for conceptualising and assessing the successes and failures of firms within the SSE sector; maintaining non-exploitative class processes for a considerable period of time is a good measure of the success of an enterprise within the SSE sector. To this end, three case studies—a Farmer Producer organisation (FPO), handloom weavers’ cooperatives and Timbaktu Collective—have been used to show the impact on the existing class processes and non-class processes. By methodologically following overdetermined interrelationships between SSEs, trade unions and political parties, both of the importance of actual and possible avenues of intervention by way of class and non-class struggles have been pointed out towards the end.

Crack development assessment using modal analysis in peridynamic theory

If structural damage remains undetected and is allowed to grow, structure's load-bearing capacity deteriorates, which can lead to costly repairs or in extreme cases its collapse. Modal analysis is widely used to detect structural damage because, when damage, such as cracks, is introduced, structure's geometrical and/or mechanical properties change, and these changes can be used for damage detection. Peridynamics is a non-local alternative to the continuum mechanics theory that represents forces and displacements using integral equations, which are defined even with discontinuous displacement fields, thus making this theory an attractive option for damage modeling. In this paper, authors verify peridynamic (PD) modal analysis against finite-element (FE) results, and validate it against experimental modal analysis results. The modal solver was implemented in the open-source program Peridigm and four different damage configurations were considered for verification and validation. The results show close agreement between the PD and the FE results, and the PD and the experimental results. Moreover, PD modal frequencies are shown to have similar accuracy to experimental data as the FE results. It is also shown that the frequency shifts are comparable between all three types of modal analysis. The PD mode shapes agreed well with both the FE and the experimental mode shapes at all considered damage configurations. Furthermore, the change in mode shapes from the introduced damage is similar in all three analyses.

The LGBTQ Press in Twentieth-Century Britain and Ireland

This chapter examines the development of the ‘gay’ press in Britain and Ireland from the late nineteenth century. Early periodicals that directly addressed gender fluidity and same-sex love were privately circulated; caution and secrecy lasted well into the 1960s. Yet at the same time considerable queer content appeared in some mainstream publications, such as fashion, film and physique magazines in the pre-decriminalisation period. More recognisably lesbian and gay publications from the 1960s sought to achieve political and cultural change and to foster social contacts for lesbians and gay men. The Gay Liberation Movement marked a wealth of short- and longer-lived magazines, newspapers and periodicals, while feminism invigorated lesbian activism and publications. Differentiation in content characterises the gay press in the late twentieth century, from glossy arts magazines to political campaign news to specialist pornography. From the 1980s there was a discernible shift towards lifestyle magazines. Regional gay and lesbian magazines also appear in this period, often overlapping with the local alternative press, although censorship and persecution continued alongside the success of the LGBT press. The chapter further identifies the specific development of LGBTQ publications in Scotland and Ireland.