Conceptual Control Method of Drilling Rig’s Torsional Vibrations Frequencies

This article focuses on the possibility of using an innovative drilling method for the implementation of underground works, especially where there is no physical possibility of using large working machines. Work on a model carried out under the INDIRES project is discussed. A design of a drilling tool equipped with the proposed technology is presented. The solution in question makes it possible to increase the efficiency of the drilling process, which is confirmed by computer simulations. Also, introductory tests of a drilling process supported by torsional vibration generated by an electromagnetic torque generator provided in the KOMAG laboratory facility show the reduction of the drilling time by almost two-fold. In our opinion, adding torsional vibration acting on the plane of a drilled wall that equals natural frequencies of the drilled material represents a promising new technology for drilling. The presented work constitutes the basis for the development of the proposed technology and allows us to conclude that the developed method will be of great interest to manufacturers of drilling machines and devices.

Review of Animal Models to Study Urinary Bladder Function

The urinary bladder (UB) serves as a storage and elimination organ for urine. UB dysfunction can cause multiple symptoms of failure to store urine or empty the bladder, e.g., incontinence, frequent urination, and urinary retention. Treatment of these symptoms requires knowledge on bladder function, which involves physiology, pathology, and even psychology. There is no ideal animal model for the study of UB function to understand and treat associated disorders, as the complexity in humans differs from that of other species. However, several animal models are available to study a variety of other bladder disorders. Such models include animals from rodents to nonhuman primates, such as mice, rats, rabbits, felines, canines, pigs, and mini pigs. For incontinence, vaginal distention might mimic birth trauma and can be measured based on leak point pressure. Using peripheral and central models, inflammation, bladder outlet obstruction, and genetic models facilitated the study of overactive bladder. However, the larger the animal model, the more difficult the study is, due to the associated animal ethics issues, laboratory facility, and budget. This review aims at facilitating adapted animal models to study bladder function according to facility, priority, and disease.

Studies on some Biochemical Parameters among Charcoal (Physiculus nematopus) Traders in Swali Market Yenagoa Bayelsa State

The aim of this study was to assess some biochemical parameters among charcoal (Physiculus nematopus) traders in Swali market Yenagoa Bayelsa State, Nigeria. Five milliliter of blood specimens was collected from each of the fifteen charcoal (Physiculus nematopus) traders with < 5 years working experience (experimental group one), fifteen charcoal (Physiculus nematopus) traders with ≥5 years working experience (experimental group two) and fifteen non charcoal traders (control group) into lithium heparin anti-coagulated bottles respectively. Thereafter alanine aminotransferase (ALT), aspartate aminotransferase (AST), urea, creatinine and C-reactive protein (CRP) were measured quantitatively. The results of charcoal traders in experimental group one showed no statistically significant differences (p>0.05) in all the measured biochemical parameters ALT (7.26U/I), AST (5.61U/I), CRP (2.48mg/L), urea (8.68mmol/L), creatinine (82.14µmol/L) as compared to that of the control group (7.22U/I), (5.58U/I), (2.47mg/L), (8.65mmo/L), (82.10µmol/L) respectively while that of experimental group two showed statistically significant differences (p<0.05) in alanine aminotransferase (20.40U/I), aspartate aminotransferase (16.20U/I) and C-reactive protein (22.42mg/L) as compared to that of the control group (7.22U/I), (5.58U/I), (2.47mg/L) respectively. However, urea (8.68mmol/L) and creatinine (82.25µmol/L) showed no statistically significant differences (p>0.05) as compared to that of the control group (8.65mmol/L), (82.10µmol/L) respectively. In conclusion alanine aminotransferase, aspartate aminotransferase and C-reactive protein may be altered in charcoal (Physiculus nematopus) traders exposed to charcoal dust for ≥ 5 years. It is therefore recommended that charcoal traders in this category should embark on hepato-inflammatory biochemical parameters investigation intermittently in any registered and licensed Medical Laboratory facility so as to monitor the concentrations of these parameters.

Photovoltaic Potential Analysis - Fuel Cell Hybrid Energy System for General-Purpose Building of Laboratory and Offices Using HOMER Software

This paper presents a performance analysis of the potential study in complementing grid utility supply with the renewable energy system. A general-purpose building consisting of office and laboratory facility has been chosen as a test case with a hybrid system of fuel cell and solar photovoltaic cells installed in addition to the existing grid power supply. HOMER simulation software was used to run the simulations, and the results showed that only the photovoltaic system is more economical to be integrated into the system. Cost-saving from the feed-in-tariff point of view was observed spanning over several years after the initial capital cost was returned.

Research of the Chlorine Sorption Processes when its Deposition by Water Aerosol

Modified stepwise model of gas sorption process with finely dispersed water flow. The sorption model allows forecasting the intensity of hazardous gases deposition with adequate for the emergency recovery conditions accuracy using minimum input parameters. This allows using the sorption model under the conditions of emergency and increasing the forecasting promptness. Use of chemical neutralizer is proposed to increase the effectiveness of chlorine hazardous gas deposition. Use of sodium hydroxide is proposed as the chlorine chemical neutralizer, which is easily dissolved in water, non-toxic and easy to store. An experimental laboratory facility was developed and created with the purpose of experimental verification of the sorption processes, which allows researching the sorption processes by liquid aerosols within a wide range of dispersity. Adequacy of the existing models as well as the modified one was verified experimentally. The verification results showed a 5% indicator of the theoretical and experimental results compliance.

Express Method of Preparation of Hollow Fiber Membrane Samples for Spinning Solution Optimization: Polysulfone as Example

This article describes a new technique for the preparation of hollow fiber (HF) membrane samples using an automatic manipulator unit. The manipulator uses a syringe needle to form a HF of a given geometry. The needle in automatic mode is sequentially immersed, first into the polymer solution and then into the coagulation bath. The possibility of using a manipulator to obtain HF samples was studied on the known polysulfone (PSf)/N-methylpyrrolidone (NMP)/pore-forming additive system. A series of HF membrane samples were made within 29 h from twelve 1 mL PSf casting solutions. This was 15 times faster than obtaining samples of HF membranes at the multifunctional research laboratory facility. From the point of view of the consumption of the components of the casting solution, the use of the manipulator was 30 times more economical, and the consumption of water for precipitation and washing was 8000 times less. The developed method made it possible to study samples of HF by scanning electron microscopy (SEM), ultrafiltration, and evaluate its mechanical properties without spinning the membranes. Using the new technique, the optimal composition of the casting solution for the wet spinning of HF PSf membranes was selected during two weeks. Thus, the manipulator makes it possible to significantly reduce the time of the new membrane preparation, reduce the volume of used polymer, and thus makes it promising to study expensive or new membrane materials.

A STUDY OF PATIENT’S PROSPECTIVE ABOUT QUALITY OF DIRECTLY OBSERVED TREATMENT SERVICES (DOTS

Introduction--A observational study was conducted in the Department Of Respiratory Medicine in a tertiary care centre who were taking ATT under DOTS or had history of ATTconsumption in the past. Aim :Aim of the study was to 1. To see the patient's perspective of the DOTS services. 2. Behaviour of the DOTS provider,3. Facilities available at the DOTS centre. 4. Waiting period. Materials and Methods: The study was carried out among 201 patients coming to the Department of Respiratory Medicine who were on ATT under DOTS or had received ATT in the past. Demographic details and clinical ndings were noted. Data collected was entered into Excel spread sheet and quantitative data were expressed as number and percentage. Results- In our study among the 201 participants who were on ATTor had history of ATTconsumption in the past, 36.8% of the participants found the attitude of DOTS providers as supportive and helpful. A slightly higher 37.3% people had neutral opinion about it. A huge 70.6% of the participants were satised with the services at the DOTS centre. A good 56.7% of the participants were of the opinion that all their queries concerning TB were satisfactorily answered. Agood 66.7% of the participants were comfortable with the waiting time at the DOTS centre. About half (53.2%) of the participants were satised with the laboratory facility and availability of drugs. 51.7% of the participants were satised with the DOTS provider. Conclusion—. Our study analysed the various aspects of interaction of patient with the DOTS provider and DOTS centre and to judge its efciency in delivering DOTS services. Our study found that DOTS provider is very important for compliance to treatment and patient satisfaction and must for completion of the treatment and we must strengthen the services