Variation Iteration Method for Solving Ethanol and Acetaldehyde Concentrations in a Fixed Bed Laboratory Reactor

In this paper, we investigate the effects of nonlinear behaviour of the dimensionless concentrations of the ethanol and acetaldehyde in a fixed bed laboratory reactor. The work is based on solving the nonlinear differential equation of concentration of the ethanol and acetaldehyde by means of the He’s variational iteration method (VIM). Also, the numerical simulation (4th order Runge – Kutta method) is reported using Matlab software. The analytical solutions are compared with numerical results in order to achieve conclusions based on not only for accuracy and efficiency of the solutions, but also the simplicity of the taken procedures which would have remarkable effects on the time devoted for solving process. The analytical result reported in this work is useful to understand the behaviour of the system. Furthermore, due to the accuracy and convergence of obtained solutions, it is proved that the VIM could be applied through other nonlinear problems even with high nonlinearity

Restructuring and hospital care: Sub-national trends, differentials, and their impacts; New Zealand from 1981

An analysis of the "nation's health" is the central concern of this study. Its genesis was a detailed, technical, time-series research on regional and ethnic differentials in health in New Zealand. But as this work progressed it became increasingly evident that the results of this more narrow analysis could make a wider contribution to the development of a knowledge-base on health trends and on the impacts of policy on these. In a sense, the analysis provides a demographic audit of health trends over the last two decades. The focus here is different from that in most other studies on restructuring of the New Zealand health system as their concern was either to review in detail the rewriting of policy per se, and attendant structural and institutional changes (Fougere 2001), or to identify how these changes relate to changes in mortality (Blakely et al. 2008). The research question reported here was, instead, to analyse the most crucial of health outcomes, „how long we live and how often we end up in hospital‟, identified in the earlier quotation, to report patterns and trends in hospital use nationally and sub-nationally over the period under review, and to determine the degrees to which various sub-populations benefited, or did not benefit, from these changes. The analysis focuses on the hospital sector in the system, but it will also show relations between this and other sectors, formal (e.g. primary health) and less formal (notably the healthcare afforded sickness and invalid beneficiaries). Thus two questions are addressed: 1. whether or not the nation‟s population health improved over the period and; 2. whether or not there was a convergence in patterns of health gain across its constituent sub-populations defined geographically and ethnically. This monograph deals with sub-national differences in health in New Zealand over a period of substantial socio-economic restructuring and associated radical changes in health policy, health systems and their related information systems (see also, Text Appendix A). It complements the recently published analysis of national ethnic trends in mortality (Blakely et al. 2004), but differs in several critical respects. That study reviewed health status by emphasising aetiologies and causes of death. In contrast, the present analysis focuses on actuarial dimensions of both mortality and morbidity and on health as measured by functional capacity rather than the disease orientated „burden of disease‟. It goes beyond health status issues to look at the system itself, to assess whether health policy outcomes were generated more through efficiency-gain (economic or service delivery, such as those resulting in a convergence sub-nationally of supply and demand effects), or through health gains, or ideally, by both. To do this, and as a by-product to analyse changes in health status and the system in an era of restructuring, innovative methodologies and composite time-series indices combining the two dimensions of a „nation‟s health‟, needing hospital care and longevity, have had to be custom-designed. To achieve this objective, the ensuing analysis is often technical, and may introduce concepts that are unfamiliar to some readers. In order to look at possible inequalities of outcome, comparisons were made between regions and ethnic groups, as well as age-groups and genders, and as a result, in places the analysis becomes rather complex

Role of Tc-99m MDP bone scan in evaluation of osteoid osteoma at varied locations

Background: Osteoid osteoma is a benign bone tumor; diagnosed using x-ray and Computer Tomography (CT). It shows a nidus and cortical thickening. When the nidus is not well visualised especially in uncommon locations; Bone Scan (BS) can be performed for evaluation of osteoid osteoma.Methods: A retrospective observational study was done where 21 subjects presenting with suspicion of osteoid osteoma underwent BS using 10-20mCi (370 to 740MBq) of Technetium-99m Pertechnetate with perfusion, delayed cortical and Single Photon Emission Tomography/Computer Tomography (SPECT/CT). Increased perfusion and delayed focal cortical uptake was assessed on BS to locate osteoid osteoma. Response evaluation to Radiofrequency ablation (RFA) was also performed using BS.Results: Osteoid osteoma was detected in femur (8), spine (3), forearm bones (2), humerus (2), tibia (2), fibula in one and iliac bone in one patient using BS. BS detected more lesions (18) than CT scan where nidus as confirmatory sign was seen in 13 lesions. The McNemar test showed no significant difference (p=0.22) in the detection of osteoid osteoma using CT and BS in common location of femur. However there was significant difference noted between BS and CT in uncommon site (p=0.023). 3/8 patients showed persistent increased cortical activity after RFA ablation on BS.Conclusions: BS was more useful for confirmation of diagnosis of Osteoid osteoma for lesions in uncommon sites. BS also helped to assess response to RFA ablation therapy. SPECT/CT improved interpretation of BS to locate the osteoid osteoma

A community-based study to evaluate the prevalence and risk factors for osteoporosis among menopausal and pre-menopausal women

Background: To determine the prevalence of osteoporosis among pre and post menopausal women using quantitative ultrasound of calcaneal bone and to identify the risk factors associated with osteoporosis.Methods: This prospective community based epidemiological study was conducted during 2019 in a suburban area attached to Sri Muthu Kumaran Medical College Hospital and Research Institute, Chennai. 305 subjects met the inclusion and exclusion criteria. Using a structured questionnaire, demographic details, obstetric, gynaecological and medical history were collected. Quantitative ultrasound of the calcaneal bone was used to calculate the bone mineral density. Using statistical methods, risk factors for osteoporosis were analysed.Results: The mean age of the participants was 52.67±9.41 years, 62.2% were post menopausal and 37.38% were premenopausal. The BMD ‘T’ score was normal in 29.8%, osteopenia was diagnosed in 38.4% and osteoporosis in 31.8% of participants. 14% of premenopausal women and 42.4% of postmenopausal women were osteoporotic. Age, menopausal status, duration of menopause, and previous history of fractures emerged as significant risk factors for osteoporosis.Conclusions: The prevalence of osteoporosis is high among both pre-menopausal and menopausal women, but the awareness is limited. This study highlights the need for screening all women after the age of 40 years which is feasible using portable and easily available technology such as quantitative ultrasound of peripheral bones

ANTI-DIABETIC ACTIVITY OF TRADITIONAL POLYHERBAL FORMULATION: DEVELOPMENT AND EVALUATION

Herbal therapy has emerged as a prominent therapeutic approach for a wide range of ailments. In tandem with a nutritious diet and lifestyle, these interventions aim to address certain health objectives by supplying each cell with the most suitable and advantageous nourishment. There exists a botanical alternative for each synthetic medicine now available. Material and Methods: The herbs utilized in the formulation were obtained from reputable vendors and subsequently verified by Department of Life Sciences, Garden City University, Bengaluru, Karnataka, India. For the purpose of standardizing raw materials, shade-dried powdered plant parts from the plants Berberis aristata (dried stem), Terminalia chebula (pericarp of matured fruit), Emblica officinalis (pericarp of dried mature fruit), Terminalalia belerica (pericarp of dried ripe fruit), and Cyperus rotundus (dried rhizome) are used. Results: Blood glucose and lipid profiles were taken first thing in the morning. The formulation had a significant impact when compared to the typical range before diabetes was introduced. Total cholesterol, bad LDL cholesterol, and bad triglyceride levels were all reduced while HDL levels were increased. The phytochemical investigation backed up the claim that flavonoids were present. This may explain why it has such a dramatic impact on treating diabetes. It is recommended that future clinical trials be conducted in Human Volunteers, and that stability studies be conducted on the manufactured polyherbal capsules. Conclusion: The oldest type of therapy, herbal remedies are used to identify and treat illnesses. An animal model was used to assess the antidiabetic potency of five raw materials that were chosen for formulation into polyherbal capsules. The capsules significantly improved the lipid profile and fasting blood glucose indices, as well as their anti-diabetic efficacy. Future use is advised to pursue additional stability research and clinical trials

Microbial Production of Amylase from Cassava Waste

Bacterium mura was isolated from cassava waste, (Tamil Nadu, India) for the production of extracellular amylase. On screening for amylase producing bacteria, 5 isolates showed positive results, of which Bacterium mura showed best amylase activity. The optimal conditions for the amylase activity were found at pH 6.0 (39 U/ml) and at temperature 37°C. Amylase activity was found to be higher when lactose (31 U/ml), casein, barley (42 U/ml) and SDS (32 U/ml) were used as the carbon source, nitrogen source, agro waste source and as additives respectively. The enzyme was partially purified by dialysis and the molecular mass was found to be 65kDa by SDS-PAGE. The partially purified and crude amylase was confirmed by zymogram. The partially purified amylase was used in bread making, which improved the softening of the bread and was used as a de-sizing agent

Application of total productive maintenance to reduce non-stick on pad problem in IC packaging.

Focus improvement activity was employed to improve front-end assembly yield in integrated circuit packaging. The top three yield losses in parts per million (ppm) in front-end assembly were contributed by the following defects: non-stick on pad (NSOP) (2715 ppm), chip and crack (782 ppm) and missing wire (687 ppm). NSOP was due to floating die, bonded ball small in size, foreign matter on pad and glassifications. Floating die contributed 48% of the NSOP defect. Detailed explanation on how focus improvement activity used to reduce NSOP due to floating die is demonstrated. Upon identifying the root cause of die floating, which was due to no support and weakness in the vacuum system, actions were taken to eliminate and to control the identified causes. As a result NSOP due to floating die was reduced from 1300 ppm to 650 ppm, a reduction of 50% within one year

Characterizing the diffuse continuum excitations in the classical spin liquid hh-YMnO3_3

We extend previous inelastic neutron scattering results on the geometrically frustrated antiferromagnet hexagonal-YMnO$_3$, which has been suggested to belong to the class of classical spin liquids. We extend the energy transfer coverage of the diffuse signal up to 6.9 meV within a wide temperature range around the ordering temperature, $T_\mathrm{N}$. The two distinct diffuse signals in the a-b plane, the signal localized at $\Gamma$' and the scattering intensity connecting $\Gamma$' points over the M', are shown to be only weakly energy dependent. In addition, an external magnetic field of up to 10.5 T applied along c is shown to have no effect on the diffuse signal. In the orthogonal scattering plane, the signals are shown to be dependent on l only through the magnetic form factor, showing that the correlations are purely two-dimensional, and supporting its origin to be the frustrated Mn$^{3+}$ triangles. This result is corroborated by atomistic spin dynamics simulations showing similar scattering vector and temperature behaviours. Lastly, data for the spin wave scattering in the (h, 0, l) plane allow for a discussion of the magnetic ground state where better agreement is found between the data and an ordered structure of the $\Gamma_1$ or $\Gamma_3$ symmetry, albeit crystal electric field arguments dismisses the $\Gamma_1$ as possibility