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  • The Ultimate Strength of Ring Stiffened Cylindrical Shell and Its Influence Factors

    Calculating the modes of cylindrical shell, then embed them into ideal perfect cylindrical pressure-resistant shell as the initial geometric imperfections to form the modal. According to the characteristics of each mode, the first 30 modes can be classified into four types, and it is found that the mode of the first type is the worst defect form. By calculation, the cylinder shell has the minimum ultimate strength when the 23rd mode happened. The sensitivity analysis of cylindrical shells with initial geometric defects shows that the critical buckling load has approximate linear relationship with different thickness radius ratio and defect amplitude. Six cylindrical shells of different materials are selected for research, and it is found that although the modal orders of the worst geometric defects of various materials are not the same, they all belong to the first type of mode. The comparison showed that the 921 steel and 909 steel materials are economic.

  • Experimental Study on the Performance of on-site Mixed Emulsion Explosives and Rock Impedance Matching

    The proportion of on-site mixed emulsion explosives in mining is getting higher and higher, in order to better use the explosive performance of mixed explosives to improve energy utilization. Based on the wave impedance theory, the wave impedance of mixed explosives is changed to make rocks The wave impedances are matched to achieve the purpose of improving the blasting effect and reducing the bulk rate. After field test, increasing the sensitizer content within a certain range is beneficial to the improvement of explosive performance. When the explosive sensitizer content is 1.15%, the best matching coefficient of mixed explosive and rock impedance is 2.51, the rock after blasting is large. The block rate is reduced and the rock crushing effect is better. After this matching test, it is shown that it is feasible to improve the blasting performance by adjusting the explosive performance of the explosive by the optimal wave impedance coefficient according to the hardness of the rock, which can provide reference for the peers.

  • INCIDENCE AND SEVERITY OF ANTHRACNOSE (Colletotrichum lindemuthianum) ON SELECTED COMMON BEAN (Phaseolus vulgaris L.) GENOTYPES

    Common bean (Phaseolus vulgaris L.), is among the most important legume crop for protein source in peoples’ diet globally and including Kenya. Anthracnose (Colletotrichum lindemuthianum) is a common disease of legumes that causes yield loss of upto 90-100%. Potential production of common beans in Kenya is expected to be above 2000 kg ha-1 but due to challenges of pests and diseases among them anthracnose, it remains below potential yields. The aim of the recent study was to investigate selected common bean genotypes for anthracnose resistance in Kenya. The study was done in three varied agro-ecological zones; Busia, Bungoma and University of Eldoret. Fifteen genotypes were evaluated on field experiment to ascertain anthracnose incidence and severity. Four bean genotypes were used as experimental controls; two resistant and two susceptible controls. Data was collected on incidences and severity and subjected to Analysis of variance in SAS version 9.1. Mean values were separated using Tukeys’ Studentized Range Test. The results revealed tolerant and resistant genotypes with lower incidences and severity than those of resistant controls while susceptible genotypes recorded higher incidences and severity than those of the susceptible controls. Tolerant genotypes were; Ciankui, Tasha, and KK8 while the resistant genotypes were; Miezi mbili, KK15 and Chelalang. Site variation was significant at (P≤0.05) with Busia 82%, Bungoma 76% and University of 53%. KK15, Tasha and Chelalang were tolerant in all sites, and this could be attributed to their genetic resistance. The six genotypes identified to be potentially tolerant and resistant to anthracnose and high yielding could be further studied and used in breeding programs for development of resistant lines globally and in Kenya.

  • Retained Penile Ring: Case Reports

    Background: Penile constriction rings have been used to prolong erection with vacuum devices in the treatment of erectile dysfunction. Some have also employed it for recreational purposes with the attendant risks of penile edema, strangulation and necrosis. We present two cases of entrapped phallus by penile rings. Case reports: 16 years old with pain and swelling of the phallus of 12 hours duration. This started after placement of a phallic ring to purportedly prolong erection which he was later unable to remove the ring despite several attempts and developed progressive swelling and pain in the phallus. He was also unable to pass urine. Examination revealed a circumcised phallus that was detumescent but grossly edematous, tender with shiny skin. Initial simple manoeuvres in the casualty proved abortive and ring had to be cut with an orthopaedic instrument. He was subsequently able to void without difficulty or any haematuria. 47 year old Asian male with a 12 hour history of penile pain and swelling following entrapment of a penile ring he had inserted for sexual gratification about 24 hours before presentation. There was a history of haematuria. The removal of the penile ring was achieved with a combination of cold compress squeeze, corporal aspiration and lubrication under general anaesthesia. Conclusion: Successful management of retained penile ring depends on early presentation by the patient to avoid adverse outcomes. It may require instruments not normally found in the urologist armamentarium.

  • The Effect of Real Effective Exchange Rate Volatility on Uganda’s Trade Balance (1993-2015)

    This paper investigated the effect of Real Effective Exchange Rate (REER) volatility on Uganda’s Trade Balance for the period 1993Q4 to 2015Q4 by employing the GARCH and ARDL methodology. The ARDL results revealed a negative relationship between the trade balance and the volatility of the real effective exchange rate in the short run. The Impulse Response Function results show evidence of the J-Curve on Uganda’s Trade Balance. Also, the results on the REER indicate that the Marshal-Lerner Condition holds for Uganda’s case. The study therefore recommends that developing a well-developed hedging facility like forward markets and institutions is critical in protecting exporters against exchange rate risk in the short run by reducing volatility of the real effective exchange rate with the aim of improving Uganda’s trade balance.

  • Thoracic mediastinal Chordoma an atypical location – Mimicking as Adenocarcinoma

    Background: Chordoma, a rare tumor accounting for less than 4% of primary bone tumors of which incidence of thoracic chordoma is 2-5%. Describing an incidental diagnosis of chordoma in a posterior mediastinal mass. Case description: An asymptomatic 52year lady with an incidental posterior mediastinal mass was diagnosed Adenocarcinoma on endoscopic biopsy of the oesophagus. Nonresponsiveness to chemoradiotherapy warranted en-bloc resection with VATS- assisted thoracotomy which turned to be a Chordoma. Conclusion: We report this atypical presentation of chordoma mimicking as adenocarcinoma with literature review — a unique learning experience.

  • Assessment of Injection Safety Practices among Health Workers in Ekiti State, Nigeria

    Safety of injections been administered on daily basis is becoming of significant Public Health importance considering the increasing prevalence of complications and the negative impact this could have on the overall good intention of the Healthcare providers. It is on the basis of this that we assessed the level of awareness and compliance with injection safety practices among Healthcare workers in Ekiti State. A descriptive cross-sectional study was conducted using multistage sampling technique to recruit 582 HCWs across the State. In Stage One, 2 LGAs were selected from each of the 3 senatorial districts by simple random sampling technique through balloting and in stage two, a list of all the Health Facilities (Public and Private) in the selected LGAs was compiled and all were included in the study. In Stage three, A cluster sampling method was used to select all the staff who are eligible to administer injections in the selected HFs at the time of survey. A semi-structured questionnaire and an observational checklist was used for data collection. Data analysis was done using SPSS version 21. A total of 582 HCWs were interviewed and 151 HFs were directly observed for compliance with Injection safety procedures. The mean age of the respondents was 38.2 ± 9.6 years. Females constituted about 86.8% while 83.5% were married. Majority of the respondents were CHEW, Nurses, Doctors and Health Attendants. Awareness of injection safety was generally high as about 93.6% of respondents were aware. However, only about 62.9% of them has ever had any form of training on Injection safety. Only about 3% of the respondents have not reused syringes, while only about 41% has ever used an AD syringe, among whom about 32% always use AD syringes. Safety boxes were available and used in about 93% of the HFs, however, the final method…

  • Idiopathic Acquired Factor VIII deficiency presenting with compartment syndrome: A case report and Literature Review

    Haemophilia is a disorder that affects the ability of the blood to form clots. The congenital form of the disease is the most prevalent, is inherited as X-linked recessive and it causes deficiency of clotting Factor VIII or IX. clinically it presents with joint bleeding. Its counterpart, acquired haemophilia is a rare condition that usually presents with cutaneous, soft tissue or internal bleeding. The pathophysiology of the disease is centred on the formation of auto antibodies which inactivate factor VIII. Haematologically this is reflected as a prolonged aPTT with normal PT and failure of mixing studies to correct aPTT to more than 50%. To confirm the diagnosis Bethesda assay has to be performed to detect the presence of factor inhibitors. In half of the cases it is associated with an underlying condition such as autoimmune diseases, malignancy, pregnancy or infections. The mainstay treatment is to control the bleeding with bypassing agents such as recombinant factor VIIa or Factor VIII inhibitor bypassing agent as well as eradicating the inhibitor with immunosuppressive and/or cytotoxic agents. Here we report a patient with idiopathic acquired haemophilia who presented with a thigh compartment syndrome. He was successfully treated with fasciotomy, bypassing agents and immunosuppressive therapy.

  • Follicular Dendritic Cell Sarcoma of Colon Presenting as Colo-colic Intussusception: a Rare Entity in Gastrointestinal Site With Extremely Rare Presentation

    Follicular dendritic cell sarcoma is a rare mesenchymal tumor of follicular dendritic cells arising from nodal and extranodal site. FDCS generally involves the lymph nodes while many extranodal sites are also affected. We report a case of follicular dendritic cell sarcoma primarily arising in colon and presenting as colo-colic intussusception.

  • Occurrence and Antimicrobial Susceptibility of Salmonella sp. and Escherichia coli in Minimally-processed and Frozen Fruit Pulps

    Fruits and fruit pulps are widely consumed worldwide due to their nutrients, flavors and varieties. However, these products become contaminated with pathogens during harvest or production, which are risks to consumers. This study analyzed the microbiological quality of frozen fruit pulps and minimally processed fruits sold in supermarkets and the presence Salmonella sp. and pathogenic Escherichia coli. Almost all frozen fruit pulps samples were adequate to consume, only one samples of unpasteurized mango pulp was positive for E. coli carrier of est1b gene that codify thermostable toxin of Enterotoxigenic E. coli. Minimally processed fruits presented high yeast and mold counts in 36.25% (29/80) of the samples and 27.6% (22/80) had thermotolerant coliforms. In addition, one sample of grated coconut had E. coli and one sample of melon honeydew had Salmonella sp. E. coli O157:H7 was absent in all samples of minimally processed fruits. E. coli showed greater resistance to ampicillin and chloramphenicol. Multidrug resistance was observed in 14.3% (2/14) of E. coli isolates. Only one strain of Salmonella sp. was resistant to antibiotic sulfamethoxazole/trimethoprim. Therefore, the enforcement of pasteurization in the fruit pulp processing, as well hygienic-sanitary control in lead up of minimally-processed fruits and temperature control in storage are recommended to minimize the risk of foodborne disease.