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202. Numerical Analysis of Natural Ventilation System in a Studio Apartment in Bangladesh.

Author

Kabir, K. M. Ariful, Hasan, Md. Rakibul, and Khan, Md. Abdul Hakim

Subjects
*VENTILATION equipment, *STUDIO apartments, *AIR flow, *COMPUTATIONAL fluid dynamics, *FINITE element method, *VENTILATION
Abstract

The study of temperature and air flow for natural ventilation system has been investigated numerically. A finite element model for studio apartment was developed with the aim of achieving detail energy allocation in the real buildings during the transient process in the walls and internal air. A tool of computational fluid dynamics (CFD) is employed to assist the process. In the tropical regions most of the energy is consumed by the heating, cooling and ventilation appliances. Therefore, the optimize ventilation system will be a suitable and valid option for the saving of energy from the household sector to increase cooling performance and ensuring thermal comfort as well. A mathematical exploration is carried out on full scale dwelling and small scale model and indication is given on the relevance of such a comparison. Calculations are carried out with household heat sources for calm and windy period, but without any human. As expected, for windy periods, the wind is the main driving force behind the internal air flow. However, in calm periods for unsteady flow the internal airflow looks like more complexes through observation. [ABSTRACT FROM AUTHOR]

Published
2017
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203. Welfare Effects of Policy-induced Rising Food Prices on Farm Households in Nigeria

Author

Shittu, Adebayo M., Obayelu, Oluwakemi A., and Salman, Kabir K.

Subjects
Welfare Effects, Policy-induced price changes, QUAIDS Model, Farm Households, Nigeria, Agricultural and Food Policy, Consumer/Household Economics, Demand and Price Analysis, D12, E42
Abstract

Against the background that domestic policies in Nigeria have been linked to an endemic - high, volatile and rising food prices in the country, this paper empirically examined the transmission of key monetary policy variables to domestic food prices in Nigeria. Furthermore, the study employed estimates of policy induced price changes from estimated cointegrating relations between commodity prices and policy variables, and demand elasticities from a system of household demand equations to estimate the associated compensating variation as a measure of the welfare impacts on farm households. The study found that government management of exchange rates and money supplies as well as withdrawal of subsidies from petroleum products have been the main driver of rising food prices in the country. While an average farmer was found to have benefited from the policy induced rising food prices with the mean compensated variation of -3.3% of the household budget, most of the farm households ended up being losers. The gainers were mostly owners of the relatively few large farms (-36.9%) including the commercial livestock farms (-38.9%), rice farm (-35.0%), and fish farms (-27.8%). Smallholders, which constituted about three-quarter of the farm households, lost on the average, about 8.1% of their purchasing power to the rising food prices, with female headed households also loosing 6.6% of their purchasing power.

Published
2014

204. A SURVEY OF CO-INFECTION OF SOME PATHOGENIC BACTERIA WITH TB IN PATIENTS ATTENDING FEDERAL MEDICAL CENTER KATSINA, NIGERIA.

Author

Abdulkadir, B., Abubakar, U., Abdullahi, B., Owuna, J. E., Murtala, R., Kabir, K., and Ibrahim, M. A.

Subjects
PATHOGENIC bacteria, MYCOBACTERIUM tuberculosis, MIXED infections, MEDICAL centers, GRAM'S stain, LUNG diseases
Abstract

Tuberculosis (TB) is known to be one of the oldest forms of human diseases which still remain the leading cause of death worldwide. It is characterized as a pulmonary disease which occurs due to accumulation of Mycobacterium tuberculosis (MTB) onto the lungs alveolar surfaces. M. tuberculosis is an implicated pathogenic bacteria associated with T.B. It is the chronic infectious disease caused by the tubercle bacillus (M. tuberculosis). This study was aimed to determine co-infection of other pathogenic bacteria within MTB patients attending Federal Medical Centre (FMC), Katsina. The study design was crosssectional, conducted to isolate some pathogenic bacteria that co-infected TB patients who are Acid fast bacilli (AFB) positive and AFB negative. The samples obtained were cultured on Blood, Chocolate and MacConkey agar and incubated at 37oC for 24 hours. Pure isolates were confirmed using Grams Staining and biochemical reaction. Data obtained were presented as simple percentage and using statistical analysis which revealed that the incidence was common among the age categories 51-60 with 28%, followed by those >60 years with 20°%. The lowest prevalence was recorded the at age category 11-20 with 10%. Based on gender, males presented with the higher incidence (35/50) i.e. 70% than female (15/50) i.e. 30%. Klebsiella pneumoniae, Staphyllococcus aureus and Pseudomonas aeruginosa were the most prevalent organisms isolated with 21.9%, 19.66% and 19.10% respectively. E. coli with 05.62% being had the least isolates. The research demonstrated the existence of both Gram positive and Gram negative bacterial pathogens that co-infect with TB patients, especially among the elderly males. Further research should be tailored towards investigating other pathogens that co-infect with MTB patients, such as fungi and viruses, in diversified hospitals in Katsina state and beyond. [ABSTRACT FROM AUTHOR]

Published
2019
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205. CHANGES IN THE ZINC CONTENT OF SELECTED BANGLADESHI RICE VARIETIES THROUGH MODIFIED PARBOILING AND MILLING METHODS.

Author

Dipti, S. S., Hotz, C., Kabir, K. A., and Bipul, M.

Subjects
RICE varieties, ZINC deficiency diseases, PARBOILED rice, PHYTIC acid, GRAIN milling, PLANTS
Abstract

Zinc deficiency is prevalent among women and children in Bangladesh, and methods to increase the zinc content of parboiled rice could contribute to its prevention. We quantified the effect of modified parboiling conditions on zinc content and of the degree of milling on zinc and phytate contents of Bangladeshi rice varieties. Parboiling studies varied the conditions used in the local commercial operations, including pre-steaming and soaking times, change of soaking water, and steaming pressure. Milling studies used 10 Bangladeshi varieties at 0% (brown), 2%, 4%, 6%, 8%, and 10% degree of milling. With ambient soaking water, shorter soaking time was observed with a higher zinc content in brown rice, but not in 10% milled rice, and changing soaking water did not modify zinc content in brown or 10% milled rice. Pre-steaming time and open- vs. closed-system steaming had no significant effect on brown or 10% milled rice zinc content. Reducing the degree of milling from 10% to 6% or 4% resulted in a mean increase in zinc content of 27% and 47%, respectively, and an increase in phytate content of 35% and 72%, respectively. Zinc content in milled rice did not appear to be significantly affected by the parboiling conditions tested. While lower degree of milling resulted in higher zinc content, it is uncertain whether the higher phytate content would fully negate this increase by decreasing the bioavailable fraction of zinc. Human studies of zinc bioavailability from Bangladeshi rice at different degrees of milling are warranted. [ABSTRACT FROM AUTHOR]

Published
2018
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206. Vergleich klinischer und radiologischer Daten bei der Behandlung von Patienten mit osteoporotischen Wirbelkörper-Kompressionsfrakturen mit Radiofrequenz-Kyphoplastie oder mit Ballon-Kyphoplastie

Author

Pflugmacher, R., Randau, T., Bornemann, R., Kabir, K., and Wirtz, D.C.

Subjects
ddc: 610, 610 Medical sciences, Medicine
Abstract

Fragestellung: Seit den 1990er Jahren hat sich die Ballon-Kyphoplastie (BKP) einem effektiven Verfahren zur Behandlung von Patienten mit schmerzhaften Wirbelkörper-Frakturen bewährt. Allerdings stehen unkontrollierbare Zementaustritte infolge der geringen Viskosität des verwendeten PM[for full text, please go to the a.m. URL], Deutscher Kongress für Orthopädie und Unfallchirurgie; 75. Jahrestagung der Deutschen Gesellschaft für Unfallchirurgie, 97. Tagung der Deutschen Gesellschaft für Orthopädie und Orthopädische Chirurgie, 52. Tagung des Berufsverbandes der Fachärzte für Orthopädie

Published
2011

207. Radiofrequenz-Kyphoplastie – ein innovatives Verfahren zur Behandlung von vertebralen Kompressionsfrakturen Untersuchungen zur Wirksamkeit und Sicherheit – Vergleiche mit konservativer Behandlung

Author

Pflugmacher, R, Bornemann, R, Kabir, K, Randau, T, and Wirtz, DC

Subjects
ddc: 610, 610 Medical sciences, Medicine
Abstract

Fragestellung: Im Rahmen einer Auswertung von Behandlungsprotokollen sollte die Dokumentation zu Wirksamkeit und Sicherheit der Radiofrequenz-Kyphoplastie erweitert und ein Vergleich zur konservativen Behandlung vorgenommen werden. Methodik: Es wurden Patienten mit schmerzhafter osteoporotischer [for full text, please go to the a.m. URL], Deutscher Kongress für Orthopädie und Unfallchirurgie; 75. Jahrestagung der Deutschen Gesellschaft für Unfallchirurgie, 97. Tagung der Deutschen Gesellschaft für Orthopädie und Orthopädische Chirurgie, 52. Tagung des Berufsverbandes der Fachärzte für Orthopädie

Published
2011
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215. Welfare effects of policy-induced rising food prices on farm households in Nigeria

Author

Shittu, Adebayo M.; Obayelu, Oluwakemi A.; Salman, Kabir K. and Shittu, Adebayo M.; Obayelu, Oluwakemi A.; Salman, Kabir K.

Abstract

Non-PR, IFPRI1; AGRODEP, MTID, Domestic policies in Nigeria have been linked to high, volatile, and rising food prices in the country. In light of these linkages, this paper empirically examines the transmission of key monetary policy variables to domestic food prices and the resulting welfare impacts. Estimates of policy-induced price changes from estimated cointegrating relations between commodity prices and policy variables as well as demand elasticities from estimated quadratic almost ideal demand system (QUAIDS) of households’ consumption expenditures, were employed to estimate the welfare impact (compensating variation) of the policy-induced price changes. The study found that government management of exchange rates and money supplies as well as withdrawal of subsidies on petroleum products have been the main driver of rising food prices in the country. While the average farm household benefited from these price increases, with the mean (median) compensating variation estimated -7.8% (-0.2%) of the household budget, a sizeable proportion (44.1 – 55.5%) of the households suffered welfare losses from various policy induced price changes. These include, notably households of smallholders (14.3 – 84.2%) and female-headed households (34.1 – 62.8%). Overall, while domestic policy actions relating to money supply and subsidy removal were Kaldor–Hicks efficient, exchange rate devaluation was not.

Published
2015

217. Radiofrequenz-Kyphoplastie (RFK) im Vergleich zur Vertebroplastie - 6 Monate prospektive klinische und radiologische Nachuntersuchung

Author

Pflugmacher, R., Randau, T., Kabir, K., Kogej, M., and Wirtz, D.C.

Subjects
ddc: 610, 610 Medical sciences, Medicine
Abstract

Fragestellung: Die Radiofrequenz- Kyphoplastie (RFK) (DFine Inc. San Jose, CA) ist ein minimalinvasives Verfahren ähnlich der Vertebroplastie und Ballon-Kyphoplastie zur Behandlung von osteoporotischen und osteolytischen Sinterungsfrakturen der Brust- und Lendenwirbelsäule. Ziel der prospektiven[for full text, please go to the a.m. URL], Deutscher Kongress für Orthopädie und Unfallchirurgie; 74. Jahrestagung der Deutschen Gesellschaft für Unfallchirurgie, 96. Tagung der Deutschen Gesellschaft für Orthopädie und Orthopädische Chirurgie, 51. Tagung des Berufsverbandes der Fachärzte für Orthopädie

Published
2010

227. Correlates of Risk-Aversion among Poultry Egg Farmers in Ibadan, Nigeria

Author

Salman, Kabir K., Ashagidigbi, Waheed M., and Jabar, K.T.

Subjects
Risk aversion, Poultry egg farmers, Safety first model., Consumer/Household Economics, Demand and Price Analysis, Production Economics, Risk and Uncertainty
Abstract

Poultry production is largely faced with a number of risks. In this study, sources of risk, attitude of farmers towards risk, the determinants and risk management strategies adopted by farmers were examined. Primary data from 74 respondents were collected using cluster sampling method with the aid of a well-structured questionnaire. Descriptive statistics, composite analysis, safety first behavioural model and the censored Tobit model were the analytical tools employed. The most prevalent source of risk in the study area was fluctuation of input prices (75.3%) and the least encountered risk source was inefficiency of workers (12.2%). Average poultry egg farmer in the study area experienced at least one source of risk. The respondents were found to exhibit low risk aversion and risk-aversion was significantly increased by cost of labour, number of layers in battery cage system and number of layers in deep litter system. However, years in poultry farming and amount of credit received significantly reduced the risk aversion among the farmers. The most used risk management strategy was relaxation of pen before re-stocking them (97.3%). Farmers should be encouraged to insure their farms and extension services should be made readily available to farmers. Enabling policy environment towards an effective credit programme should be facilitated while attention should also be shifted towards protection of farmers against input price variations.

Published
2010

228. Ausrisskraft PMMA-augmentierter Pedikelschrauben im osteoporotischen vs. nicht-osteoporotischen humanen Kadavermodel

Author

Deborre, C, Kabir, K, Weber, O, Burger, C, Wirtz, DC, and Goost, H

Subjects
ddc: 610, 610 Medical sciences, Medicine
Abstract

Fragestellung: Die Verwendung einer zementaugmentierten Pedikelschraube ist bisher nur bei vorbestehender Osteoporose oder Revionsoperation empfohlen. Häufig bleibt es aber dem intraoperativen Gespür bzw. der Erfahrung des Operateurs überlassen, eine Pedikelschraube zu augmentieren. [for full text, please go to the a.m. URL], Deutscher Kongress für Orthopädie und Unfallchirurgie; 74. Jahrestagung der Deutschen Gesellschaft für Unfallchirurgie, 96. Tagung der Deutschen Gesellschaft für Orthopädie und Orthopädische Chirurgie, 51. Tagung des Berufsverbandes der Fachärzte für Orthopädie

Published
2010
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229. Scenario Analysis in the Measurement of Operational Risk Capital: A Change of Measure Approach

Author

Kabir K. Dutta and David F. Babbel

Subjects
Actuarial science, Cost of capital, Financial risk, Risk-adjusted return on capital, Econometrics, Economics, Financial risk management, Scenario analysis, Loss given default, Credit risk, Operational risk
Abstract

At large financial institutions, operational risk is gaining the same importance as market and credit risk in the capital calculation. Although scenario analysis is an important tool for financial risk measurement, its use in the measurement of operational risk capital has been arbitrary and often inaccurate. We propose a method that combines scenario analysis with historical loss data. Using the Change of Measure approach, we evaluate the impact of each scenario on the total estimate of operational risk capital. The method can be used in stress-testing, what-if assessment for scenario analysis, and Loss Given Default estimates used in credit evaluations.

Published
2010
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230. Ergebnisse von intraartikulären Tibiakopffrakturen beim älteren Patienten

Author

Kabir, K, Mail, E, Weber, O, Goost, H, Wirtz, DC, and Burger, C

Subjects
ddc: 610, 610 Medical sciences, Medicine
Abstract

Fragestellung: Welche Versorgung für die Tibikopffraktur beim älteren Patienten als die adäquate und richtige Therapie zu empfehlen sei, wird in der Literatur sehr kontrovers diskutiert. Das Ziel der folgenden Studie war das funktionelle Langzeitergebnis und die Lebensqualität nach[for full text, please go to the a.m. URL], Deutscher Kongress für Orthopädie und Unfallchirurgie; 73. Jahrestagung der Deutschen Gesellschaft für Unfallchirurgie, 95. Tagung der Deutschen Gesellschaft für Orthopädie und Orthopädische Chirurgie, 50. Tagung des Berufsverbandes der Fachärzte für Orthopädie

Published
2009
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231. Die distale intraartikuläre Humerusfraktur beim älteren Patienten: Ist die Endoprothese der Osteosynthese ebenbürtig?

Author

Weber, O, Kabir, K, Müller, M, Goost, H, and Burger, C

Subjects
ddc: 610, 610 Medical sciences, Medicine
Abstract

Fragestellung: Distale intraartikuläre Humerusfrakturen des älteren Menschen wurden bislang im deutschsprachigen Raum vorwiegend osteosynthetisch versorgt. Allerdings kann die Frakturmorphologie in Kombination mit Osteoporose eine suffiziente Reposition, Retention und frühe postoperative[for full text, please go to the a.m. URL], Deutscher Kongress für Orthopädie und Unfallchirurgie; 73. Jahrestagung der Deutschen Gesellschaft für Unfallchirurgie, 95. Tagung der Deutschen Gesellschaft für Orthopädie und Orthopädische Chirurgie, 50. Tagung des Berufsverbandes der Fachärzte für Orthopädie

Published
2009
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232. Die navigierte Osteosynthese der lateralen Schenkelhalsfraktur mittels dynamischer Hüftschraube

Author

Belei, P, Strake, M, Kabir, K, Radermacher, K, Wirtz, DC, and Müller, M

Subjects
ddc: 610, 610 Medical sciences, Medicine
Abstract

Fragestellung: Die Osteosynthese der stabilen lateralen Schenkelhalsfraktur mit einer dynamischen Hüftschraube (DHS) ist ein standardisiertes Verfahren. Trotz guter Ergebnisse werden unbefriedigende Repositionsergebnisses im Sinne einer primären Varus- oder Valgusfehlstellung oder die Migration[for full text, please go to the a.m. URL], Deutscher Kongress für Orthopädie und Unfallchirurgie; 73. Jahrestagung der Deutschen Gesellschaft für Unfallchirurgie, 95. Tagung der Deutschen Gesellschaft für Orthopädie und Orthopädische Chirurgie, 50. Tagung des Berufsverbandes der Fachärzte für Orthopädie

Published
2009
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233. 2D-navigierte Verschraubung der medialen Schenkelhalsfraktur unter Verwendung des Zero-Dose Verfahrens

Author

Müller, M, Belei, P, Strake, M, Kabir, K, Radermacher, K, and Wirtz, DC

Subjects
ddc: 610, 610 Medical sciences, Medicine
Abstract

Fragestellung: Die minimal-invasive Verschraubung der medialen Schenkelhalsfraktur nach geschlossener Reposition ist ein standardisiertes Verfahren. Trotz guter Ergebnisse werden Fehlplatzierungen und sekundäre Dislokationen in bis zu 50% der Fälle beschrieben. Des Weiteren geht die geschlossene[for full text, please go to the a.m. URL], Deutscher Kongress für Orthopädie und Unfallchirurgie; 73. Jahrestagung der Deutschen Gesellschaft für Unfallchirurgie, 95. Tagung der Deutschen Gesellschaft für Orthopädie und Orthopädische Chirurgie, 50. Tagung des Berufsverbandes der Fachärzte für Orthopädie

Published
2009
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240. MHD Natural Convection Flow along a Vertical Wavy Surface with Heat Generation and Pressure Work.

Author

Alim, M. A., Kabir, K. H., and Andallah, L. S.

Subjects
*NATURAL heat convection, *MAGNETOHYDRODYNAMICS, *SURFACES (Technology), *BOUNDARY layer (Aerodynamics), *STRUCTURAL plates
Abstract

In this paper, the influence of pressure work on MHD natural convection flow of viscous incompressible fluid along a uniformly heated vertical wavy surface with heat generation has been investigated. The governing boundary layer equations are first transformed into a non-dimensional form using suitable set of dimensionless variables. The resulting nonlinear system of partial differential equations are mapped into the domain of a vertical flat plate and then solved numerically employing the implicit finite difference method, known as Keller-box scheme. The numerical results for the velocity profiles, temperature profiles, skin friction coefficient, the rate of heat transfers, the streamlines and the isotherms are shown graphically and skin friction coefficient and rate of heat transfer have been shown in tabular form for different values of the selective set of parameters consisting of pressure work parameter Ge, the magnetic parameter M, Prandtl number Pr, heat generation parameter Q and the amplitude of the wavy surface. [ABSTRACT FROM AUTHOR]

Published
2016
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241. The Effect of Mass Recovery Adsorption Cooling Cycle to Optimize the Collector Number and Time Allocation.

Author

kabir, K. M. Ariful, Alam, K. C. Amanul, Rouf, Rifat A., and Sarker, M. M. A.

Subjects
*TIME management, *SOLAR energy, *MASS transfer, *PROCESS optimization, *SILICA gel
Abstract

The performance of mass recovery for solar adsorption cooling system has been investigated numerically. Solar adsorption cooling appears to have a prospect in tropical region. Though it has a huge installation cost, its long term payback could be a considerable fact. Mass recovery scheme increases Average Cooling Capacity (ACC) and Coefficient of Performance (COP) values of the adsorption cooling system. In intension to reduce cost and maximize system performance, a two bed solar driven conventional cooling system run by silica gel and water along with mass recovery process has been investigated mathematically. [ABSTRACT FROM AUTHOR]

Published
2016
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246. RISK PREFERENCES AND RESOURCE ALLOCATION DIFFERENTIALS OF FOOD CROP FARMERS

Author

Salimonu, Kabir K. and Falusi, Abiodun O.

Subjects
Risk Preferences, Food Crop, Resource allocation, Efficient Plan, Production Economics, Resource /Energy Economics and Policy, Risk and Uncertainty, food and beverages, respiratory tract diseases
Abstract

Apprehension of risk induces certain behaviour into a farmer and this would grossly affect enterprise selection and consequently his resource use and allocation pattern. In this study, risk preferences of food crop farmers in Osun State were measured and efficient resource use and allocation patterns were modeled and suggested. Data from 165 farmers, obtained using a two-stage sampling procedure were used in the study. Analytical tools were descriptive statistics, Risk Behavioural Model (RBM) and Target Minimization of Total Absolute Deviation (T-MOTAD). Risk averse farmers were 144 representing 87.3 percent while the risk preferers were 21 representing 12.7 percent. However risk preference was higher among the males, farmers with larger farm sizes and smaller household sizes. Efficient utilization of labour and borrowed capital was discovered among the risk preferers than the risk averters; hence a significant difference existed in their returns (P< 0.01). It is recommended that farm management research and the extension packages should be channel to the farmers while considering the socio-economic environments that characterize their risk preferences.

Published
2007

247. Understanding the relationship between stay-at-home measures and vaccine shortages: a conventional, heterogeneous, and fractional dynamic approach.

Author

Ullah, Mohammad Sharif, Kamrujjaman, Md., and Kabir, K. M. Ariful

Subjects
*COMMUNICABLE diseases, *INFECTIOUS disease transmission, *SCARCITY, *VACCINES, *RESPIRATORY diseases
Abstract

In light of the global prevalence of a highly contagious respiratory disease, this study presents a novel approach to address the pressing and unanticipated issues by introducing a modified vaccination and lockdown-centered epidemic model. The rapid spread of the disease is attributed to viral transmissibility, the emergence of new strains (variants), lack of immunization, and human unawareness. This study aims to provide policymakers with crucial insights for making informed decisions regarding lockdown strategies, vaccine availability, and other control measures. The research adopts three types of models: deterministic, heterogeneous, and fractional-order dynamics, on both theoretical and numerical approaches. The heterogeneous network considers varying connectivity and interaction patterns among individuals, while the ABC fractional-order derivatives analyze the impact of integer-order control in different semi-groups. An extensive theoretical analysis is conducted to validate the proposed model. A comprehensive numerical investigation encompasses deterministic, stochastic, and ABC fractional-order derivatives, considering the combined effects of an effective vaccination program and non-pharmaceutical interventions, such as lockdowns and shutdowns. The findings of this research are expected to be valuable for policymakers in different countries, helping them implement dynamic strategies to control and eradicate the epidemic effectively. [ABSTRACT FROM AUTHOR]

Published
2024
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