Incidence of ulcer type of disease in wild fishes of Bangladesh

Disease occurred in wild fish species investigated in different water bodies like canals, ditches, beel, haor, flood plain in 17 districts of Dhaka division. Haemorrhagic lesions were observed on the body surface of affected fishes. Incidence of the disease in the investigated water bodies ranged from 0 to 100%. In total 19 fish species were found to be affected and prevalence of infection ranged from 0.0 to 100.0%. Channa punctatus and Puntius ticto were severely affected in all locations. Percentage of infection in these fishes ranged from 0.0 to 100.0. The highest infection was observed in Netrokona, Kishoreganj, and Mymensingh districts. Bacterial genera isolated from the lesions of these affected fishes were Aeromonas, Pseudomonas, Flavobacterium, Micrococcus, and Staphylococcus. Among these isolates Aeromonas was the dominant. Abundance of Aeromonas in the lesions among the investigated bacteria ranged from 75 to 90%. Five identified Aero monas lrydrophila were examined for their pathogenicity and were able to infect the experimental fish, silver barb (Puntius gonionotus). The pathogen Aeromonas hydrophila was thus considered to have an association with the outbreak of ulcer type of disease in the investigated fish species

Performance Analysis of Plain Journal Bearing Using CFD Model

Bearing stability depends on the slenderness ratio (L/D), lubricant film thickness, lubricant whirl frequency, lubricant oil temperature, lubricant pressure, attitude angle, stiffness coefficient, viscosity, lubricant density etc.Due to the friction force between shaft and bearing, bearing performance need to be determined according to different lubrication states and different geometry of the journal bearing, though it is difficult to find the performance using experiment. A new approach has been proposed in this study to determine the performance parameter using Ansys.The purpose of this study is to obtain an efficient slenderness ratio (L/D) by stiffness coefficient analysis on different coordinate of the journal bearing. It is a major concern to find out the viscosity and slenderness ratio (L/D) effects on bearing performance using CFD analysis. This is the first such type of study that the bearing performance has been conducted with0.25 to 1.00 range of slenderness ratioand change of viscosity of lubricants by FLUENT 14.5. A Computational Fluid Dynamic (CFD) approach was applied which focused an optimized slenderness ratio range of 0.25 to 0.5 results lower elastic strain, deformation, and stress formation on the journal comparison to 1.00L/D ratio.

Feasibility of a healthcare system-based tetralogy of Fallot patient registry

Background Patient-reported outcomes and epidemiological studies in adults with tetralogy of Fallot are lacking. Recruitment and longitudinal follow-up investigation across institutions is particularly challenging. Objectives of this study were to assess the feasibility of recruiting adult patients with tetralogy of Fallot for a patient-reported outcomes study, describe challenges for recruitment, and create an interactive, online tetralogy of Fallot registry. Methods Adult patients living with tetralogy of Fallot, aged 18-58 years, at the University of North Carolina were identified using diagnosis code query. A survey was designed to collect demographics, symptoms, history, and birth mother information. Recruitment was attempted by phone (Part I, n=20) or by email (Part II, n=20). Data analysis included thematic grouping of recruitment challenges and descriptive statistics. Feasibility threshold was 75% for recruitment and for data fields completed per patient. Results In Part I, 60% (12/20) were successfully contacted and eight (40%) were enrolled. Demographics and birth mother information were obtained for all enrolled patients. In Part II, 70% (14/20) were successfully contacted; 30% (6/20) enrolled and completed all data fields linked to REDCap database; the median time for survey completion was 8 minutes. Half of the patients had cardiac operations/procedures performed at more than one hospital. Automatic electronic data entry from the online survey was uncomplicated. Conclusions Although recruitment (54%) fell below our feasibility threshold, enrolled individuals were willing to complete phone or online surveys. Incorrect contact information, privacy concerns, and patient-reported time constraints were challenges for recruitment. Creating an online survey and linked database is technically feasible and efficient for patient-reported outcomes research

Tribological behavior and vibration effect on the friction coefficient and temperature of glass fiber composite

The extents of contact coefficient are diverse for various material sets relying upon typical load and sliding speed. In the present research, grating coefficients and wear of glass fiber (GF) composite circles sliding against aluminum stick under vibration are explored and the outcomes were contrasted with a similar condition which is not in under vibration. So as to play out the tests, a stick on circle mechanical assembly is utilized. Tests are completed when aluminum stick slides on glass fiber (GF) plates of various organizations, for example, polyamide 6 (PA6), 20% GF and 15% GF. Examinations are led at ordinary load 2.5, 3.75 and 5N, sliding speed 0.5, 0.75 and 1 m/s. Varieties of erosion coefficient with the length of rubbing at diverse typical loads and sliding speeds are explored under vibration (vertical vibration). As a rule, contact coefficient expanded for a specific length of rubbing yet after that it stay steady for whatever remains of the test time. The trial result uncovers that contact coefficient diminished with the expansion in ordinary load for all the tried plates at steady speed and spring solidness. Then again, it is additionally found that grating coefficient diminished with the expansion in sliding speed however wear rate increments. Besides, both the friction coefficient and wear rate expanded with the expansion in spring firmness at consistent typical load and sliding speed for all sliding pairs. The contact coefficient is observed to be to some degree littler under vibration contrasted with that of vibration less condition.

Testing the viability of measuring intraocular pressure using soundwaves from a smartphone

Abstract Early detection of increasing values of intraocular pressure (IOP) due to glaucoma can prevent severe ocular diseases and ultimately, prevent loss of vision. Currently, the need for an accurate, mobile measurement of IOP that shows no correlation to central corneal thickness is unmet within the modern healthcare practices. There is a potential to utilize soundwaves as a mobile measurement method and therefore, the relationship between IOP and the reflection coefficient of sound waves is investigated. Simulations are conducted using COMSOL Multiphysics to provide theoretical confirmation of the worthiness of the experiment. An experiment is conducted to further investigate the relationship between the internal pressure of an object and its acoustic reflection coefficient. The experiment exploits the use of hydrostatic pressure to determine internal pressure, and the reflection coefficient is measured and analyzed. An initial experiment is conducted to identify the resonant frequency of the object and the optimal frequency for maximizing reflection. The experiment shows comprehensively that there is a relationship between the internal pressure of an object and its acoustic reflection coefficient, providing a confirmation of the theory that would allow mobile measurements of IOP to be conducted with the use of a smart phone

Species Diversity and Assemblage of Mangroves at Setiu Wetland, Terengganu, Malaysia

Mangroves in wetland ecosystems are diverse and play significant role in the adjacent communities on which they are dependent for their livelihoods. It is also important for fishery resources and nutrient inputs in marine and brackish water ecosystems. However, little is known about the tropical wetland lagoon ecosystems, particularly mangrove diversity and assemblages. Therefore, this present study was initiated to observe the mangrove species diversity and assemblages together with the conservation status in an important tropical wetland ecosystem in Setiu, Terengganu, Malaysia. In a variety of landward and small fringe island areas, three zones of square plots were selected (zones 1, 2 and 3) to address the objectives of this study. As a result, a total of 20 true mangrove species belonging to 11 genera from nine families were documented, of which, Avicennia rumphiana was listed as vulnerable (VU) by the IUCN. Twelve species of mangrove associates from 11 genera and nine families were also found in the investigated zones at Setiu. One of the mangrove associates, Intsia bijuga, was designated as vulnerable (VU) by the IUCN. The Shannon diversity index (H') of mangroves was found to be 1.08 at Setiu Wetland. Rhizophora mucronata was found to be well-expanded (H' = 1.05) followed by A. rumphiana, A. officinalis, Heritiera littoralis, A. corniculatum. Excoecaria agallocha, Lumnitzera racemosa, and A. ebracteatus (H' = 0.0) as the lowest. The findings of the present study revealed that mangroves in the Setiu Wetland are diverse and healthy compared to other mangrove ecosystems in the region. To maintain the health and function of the mangrove ecosystem in Setiu Wetland, proper monitoring is required

Geometrothermodynamics of five dimensional black holes in Einstein-Gauss-Bonnet-theory

We investigate the thermodynamic properties of 5D static and spherically symmetric black holes in (i) Einstein-Maxwell-Gauss-Bonnet theory, (ii) Einstein-Maxwell-Gauss-Bonnet theory with negative cosmological constant, and in (iii) Einstein-Yang-Mills-Gauss-Bonnet theory. To formulate the thermodynamics of these black holes we use the Bekenstein-Hawking entropy relation and, alternatively, a modified entropy formula which follows from the first law of thermodynamics of black holes. The results of both approaches are not equivalent. Using the formalism of geometrothermodynamics, we introduce in the manifold of equilibrium states a Legendre invariant metric for each black hole and for each thermodynamic approach, and show that the thermodynamic curvature diverges at those points where the temperature vanishes and the heat capacity diverges.Comment: New sections added, references adde

Local political consolidation in Bangladesh: power, informality and patronage

During the past decade Bangladesh has shifted from a competitively clientelistic two‐party system towards a dominant‐party democracy. This article analyses how the ruling party has consolidated partisan political control at the local level. Using qualitative field data from 2004 and 2016, and drawing on a post‐structural analysis of the state, it shows how this extension of power has been achieved locally through interaction between formal and informal political initiatives. Four main types of informal activity are documented, through which the extent of local political competition has been reduced: circumvention, capture, brokerage and the creation of new organizations. These insights into the changing nature of Bangladesh's long‐standing partisan politics highlight how the state's capacity to deliver local services, allocate resources and maintain stability has been enhanced through the ruling party's control of local government structures, its elimination of political opposition, and its reshaping of local patronage arrangements