Conformal vector fields on doubly warped product manifolds and applications

In this article, we present a complete study of two disjoint classes of conformal vector fields on doubly warped product manifolds as well as on doubly warped space-times. Then we study Ricci solitons on doubly warped product manifollds admitting these types of conformal vector fields

PEMANFATAN BIOINHIBITOR KOROSI DARI EKSTRAK BUAH MAHKOTA DEWA

THE UTILIZATION CORROSION BIOINHIBITOR PHALARIA MACROCARPA EXTRACT (Sayied Hussein, Final Report, 2014, 41 pages , 5 Sections, 8 Tables ,10 Figure , 3 enclosures) Research has been done about the use of phaleria macrocarpa extract as inhibitor for corrosion rate. This research is innovation or the development from previous research. The contents of tannin in the phaleria macrocarpa are believed to be able to give protection on the iron plate. The low carbon of blend iron is mediated with 3 solution of corrosive that is 0,5 m hyroclorid acid solution, salt water, and PDAM water. After 35 days, it can be known that tannin in the phaleria macrocarpa about 1.33667 % and with the extract,it can be inhibition protection of corrosion on the sample mediated in the acid solution and PDAM water but it doesn't give effect on the reduction of corrosion rate on the salt water medium. Keywords: phalaria macrocarpa, inhibitors, tannins, corrosive mediu

Effect of Web Causation Epidemiological Model on Preventive Behaviors of Diabetic Females with Genitourinary Tract Infection

Context: Genitourinary tract infection becomes a silent epidemic that devastated female life. It is closely interrelated with hyperglycemia, diabetes, and lack of awareness about personal hygiene care. All increase the susceptibility to various types of infections. Aim: To assess the effect of the web causation epidemiological model on preventive behaviors of diabetic females with genitourinary tract infection. Methods: The study was conducted at a diabetic outpatient clinic in El Demerdash Hospital because it received clients from different areas and has a high population rate. This study encompasses a purposive sample of 100 females. A quasi-experimental research design was selected. Data were collected using a structured interviewing questionnaire and preventive practice checklists to assess the knowledge and practices of the diabetic female. Results: 69% of diabetic females had a family history of diabetes mellitus. 39% of them had satisfactory knowledge about causes that increased blood glucose in diabetic females shifted to 81% post-intervention. 35% of diabetic females had satisfactory knowledge about the function of the reproductive system at preprogram shift to 93% at post-program implementation. 34% of diabetic females had satisfactory knowledge about entry urinary tract infection methods at preprogram shift to 81% at post-program implementation. A highly statistically significant association between the presence of urine infection and the application of the web causation model (causative factors) such as lack of hygiene during menstruation, lack of hygiene before and after sexual intercourse, using mechanical contraceptive methods, increase in the intake of salty foods, poor glycemic control and lack of personal hygiene with the results of urine analysis for infection. Conclusions: Females exposed to the web causation epidemiological model exhibited better knowledge and preventive practices after exposure than their pre-intervention level. Apply the web-causation model to high population areas such as slum areas on a large group of participants to improve awareness and practices regarding diabetes mellitus and genitourinary tract infection. Replicate the current study on a representative sample to improve the generalizability

Meningioma segmentation in T1-weighted MRI leveraging global context and attention mechanisms

Meningiomas are the most common type of primary brain tumor, accounting for approximately 30% of all brain tumors. A substantial number of these tumors are never surgically removed but rather monitored over time. Automatic and precise meningioma segmentation is therefore beneficial to enable reliable growth estimation and patient-specific treatment planning. In this study, we propose the inclusion of attention mechanisms over a U-Net architecture: (i) Attention-gated U-Net (AGUNet) and (ii) Dual Attention U-Net (DAUNet), using a 3D MRI volume as input. Attention has the potential to leverage the global context and identify features' relationships across the entire volume. To limit spatial resolution degradation and loss of detail inherent to encoder-decoder architectures, we studied the impact of multi-scale input and deep supervision components. The proposed architectures are trainable end-to-end and each concept can be seamlessly disabled for ablation studies. The validation studies were performed using a 5-fold cross validation over 600 T1-weighted MRI volumes from St. Olavs University Hospital, Trondheim, Norway. For the best performing architecture, an average Dice score of 81.6% was reached for an F1-score of 95.6%. With an almost perfect precision of 98%, meningiomas smaller than 3ml were occasionally missed hence reaching an overall recall of 93%. Leveraging global context from a 3D MRI volume provided the best performances, even if the native volume resolution could not be processed directly. Overall, near-perfect detection was achieved for meningiomas larger than 3ml which is relevant for clinical use. In the future, the use of multi-scale designs and refinement networks should be further investigated to improve the performance. A larger number of cases with meningiomas below 3ml might also be needed to improve the performance for the smallest tumors.Comment: 16 pages, 5 figures, 3 tables. Submitted to Artificial Intelligence in Medicin

Camel Milk and the Prevention of Glucose Cataract, an Organ Culture Study

Purpose: To test if camel milk affects glucose-induced opacity in organ cultured rat and human lenses.Methods: Whole human and rat lenses were cultured in various media containing either 55 mM glucose, camel milk, or a combination of both glucose and milk. Some lenses were cultured in a media containing neither moiety to establish a control. Absorbance spectra of human and rat lenses were measured daily using a visible/ultraviolet light spectrometer. Lens opacities were graded by a blinded grader from photographs taken daily. Aldose reductase activity, catalase activity, glutathione and receptor for advanced glycation end products levels were assayed.Results: The optical density and light scattering intensity of human lenses cultured with glucose were higher after two to four days in organ culture compared with lenses cultured without glucose. Camel milk in the culture media attenuated the glucose-induced increase in optical density, light scattering intensity and opacity grade after two to four days for both human and rat lenses. Aldose reductase activity, catalase activity and glutathione levels were restored but the receptor for advanced glycation end products was similar in rat lenses cultured with glucose compared with those cultured with glucose and camel milk. There were no differences between the assayed moieties in human lenses cultured with glucose or glucose plus milk. Since camel milk restored rat lens glutathione levels, it is possible that camel milk may protect the lens from oxidation and significantly reduce the glucose-induced increase in light scattering of human lenses. Structurally and physiologically, rat lenses are distinct from human lenses, therefore, the rat lens data was highly variable when compared with the human lens data, highlighting the importance of using human lenses in future studies.Conclusions: Camel milk present in the organ culture medium inhibited the glucose-induced opacity in human lenses and restored the amount of glutathione to the same levels of lenses not cultured in glucose. The positive results of the current study leads to future studies to determine the moieties in camel milk that are responsible for cataract inhibition and in vivo studies involving camel milk

Evaluation of graft uptake in underlay myringoplasty using dry and wet temporalis fascia graft

Chronic otitis media (COM) is a vital cause of deafness worldwide. Myringoplasty is one of the best treatment options for COM (inactive mucosal variety). Temporalis Fascia is the most favored grafting material among various autografts, which can be used as dry or wet depending upon the Surgeon's choice. The main focus of this study is to compare the graft uptake rate by using dry and wet temporalis fascia by underlay technique. This cross-sectional comparative study was directed from January 2018 to June 2019 at the Department of Otolaryngology-Head & Neck Surgery of BSMMU, Dhaka. All consecutive cases of COM (inactive mucosal) who underwent surgery were randomly assigned either into the dry (Group-A) or wet temporalis fascia group (Group-B). At 12 weeks follow-up, the density of graft failure (4.4% vs. 8.8%) and retraction pocket (0% vs. 2.2%) were higher in the wet procedure. However anterior blunting (2.2% vs. 2.2%) were the same in both procedures, and medialization (2.2% vs. 0%) were more in the dry procedure. Air Bone Gap (ABG) improved significantly in both groups following operation but reduced in Group-A more significantly than Group-B. On the other hand, there was no remarkable difference in successful graft uptake between the groups (Dry group-91.12% vs. wet group-84.44%, p>0.05). No graft material is superior to others in terms of graft uptake. BSMMU J 2022; 15(2): 84-8