243 research outputs found
The Islamic slave revolts of Bahia, Brazil : a continuity of the 19th century Jihaad movements of Western Sudan
No full textAuthor's full name is Abu Alfa Muhammad Shareef bin Farid
Assessing the Accuracy of Gridded Precipitation Products in the Campania Region, Italy
No full textAccurate precipitation data are essential for hydrological modeling, climate studies, and water resource management. Indeed, there is an increasing focus on understanding shifts in precipitation events to monitor the risks of floods and droughts, as well as to ensure sustainable water resource management. This study compares four reanalysis and satellite precipitation products (ERA5-Land, CHIRPS, PERSIANN, and TerraClimate) with ground data from 2003 to 2022. Among the datasets evaluated, ERA5-Land has the best performance (overall) in reproducing ground data, with a minimal mean bias error (MBE) of 1.91 mm, the highest correlation coefficient (R2 = 0.93), and the most favorable Nash–Sutcliffe efficiency (NSE = 0.93). In contrast, CHIRPS, PERSIANN, and TerraClimate significantly underestimate precipitation as compared to ground data. The categorical metrics also highlight ERA5-Land’s superior performance in identifying wet months. Spatial analysis shows that ERA5-Land and other datasets generally exhibit agreement regarding precipitation patterns. However, PERSIANN displays notable variances, particularly in northern regions, where it overestimates precipitation. To investigate possible changes in precipitation patterns, a longer period (1983–2022) is selected for trend analysis based on gridded precipitation products. Sen’s slope analysis does not reveal any significant annual precipitation trend. In autumn, the PERSIANN dataset indicates a significant increasing trend of +1.81 mm/year, which is also confirmed by ERA5-Land (+2.68 mm/year) and CHIRPS (+1.34 mm/year), although without statistical significance. The findings emphasize the need for more sophisticated satellite algorithms and integration with ground observations to improve precipitation accuracy
Palf-crete / Muhammad Aiman Hafiz Ab. Halim, Khairul Ammar Hakimi Khairulmuzzamil and Muhammad Shareef Nahoor Aziz
No full textNatural fibres appear to be outstanding materials which are viable substitute for the expensive and non –renewable synthetic fiber. Pineapple Leaf Fiber (PALF) has good potential as reinforcement in foamed concrete. In this study, PALF of specific aspect ratio will randomly be dispersed in foamed concrete mortar for the preparation of test specimens and tested with compressive strength test, flexural strength test and indirect splitting tensile strength test. Tests used are all based on ASTM Standards
Surface modification for osseointegration of Ti6Al4V ELI using powder mixed sinking EDM
No full textBiomedical implant rejection due to micromotion and inflammation around an implant leads to osteolysis and eventually has an implant failure because of poor osseointegration. To enhance osseointegration, the implant surface modification both at the nano and micro-scale levels is preferred to result in an enhanced interface between the body tissue and implant. The present study focuses on the modification of the surface of Titanium (α+β) ELI medical grade alloy using powder-mixed electric discharge machining (PMEDM). Pulse current, on/off time, and various silicon carbide (SiC) powder concentrations are used as input parameters to comprehend desired surface modifications. Powder concentration is considered as the most important factor to control surface roughness and recast layer depth. A significant decrease in surface fracture density and roughness is observed using a 20 g/l concentration of SiC particles. Elemental mapping analysis has confirmed the migration of Si and the generation of promising surface texture and chemistry. Oxides and carbides enriched surface improved the microhardness of the re-solidified layer from 320 HV to 727 HV. Surface topology reveals nano-porosity (50–200 nm) which enhances osseointegration due to the absorption of proteins especially collagen to the surface
Mobile Press-Register sleeve MP0042643
No full textHarry Muhammad, Wali Mustafah, Matthew Abdullah, Maryam Hasan, Shareef Id-deen, Patricia Sabree / (Bishop State Junior College
Modelling International Tourism Demand and Uncertainty in Maldives and Seychelles: A Portfolio Approach
No full textMaldives and Seychelles in the Indian Ocean are small island tourism economies (SITEs), both of which have relatively small populations, territorial sizes, land area and narrow productive bases. The two SITEs are surrounded by vast ocean and have an overwhelming reliance on international tourism for economic development. Variations in international tourist arrivals to these 2 SITEs have been affected by unanticipated oil shocks, natural disasters, crime and global terrorism, among others. An accurate assessment of the variations in international tourist arrivals, particularly the conditional volatility, is essential for policy and marketing purposes. The conditional mean and conditional variance of the weekly international tourist arrivals to Maldives and Seychelles from 1 January 1994 to 31 December 2003 for the 5 main tourist source countries are modelled. Multivariate models of uncertainty are estimated and tested. An assessment and interpretation of the estimates are made for policy makers and tour operators to reach optimal decisions on the basis of a portfolio approach to international tourism demand. The paper assesses 4 sets of country spillover effects between Maldives and Seychelles, namely: (i) the own country effects for Maldives and Seychelles; (ii) the country spillover effects from the remaining four countries within each of Maldives and Seychelles; (iii) the own country spillover effects between Maldives and Seychelles; and (iv) the cross-country spillover effects between Maldives and Seychelles. The empirical results for both Maldives and Seychelles are discussed in terms of each of these components.Small island tourism economies, Weekly international tourist arrivals, Uncertainty, Conditional volatility, Country spillover effects Acknowledgements: The first author wishes to acknowledge the financial support of the School of Accounting, Finance and Economics, Edith Cowan University. The second author is most grateful for the financial support of the Australian Research Council.
URDU-AN OVERVIEW ON THE LITERARY CONTRIBUTIONS OF SHEIKH MUHAMMAD HAYAT SINDHI
No full textNo doubt, Sindh has received a distinctive position as the first land in the sub-continent, where the light of Islam spread all over. The region of Sindh has produced many Muslim scholars who were famous all around the Islamic world. One of them was Sheikh Muhammad Hayat Sindhi (d. 1163 A.H). He was one of the most distinguished Islamic scholars, jurists, and prolific authors of the Hanafī School of jurisprudence from Sindh. He was widely regarded as one of the foremost experts of Hadīth and jurisprudential studies, as well as other religious disciplines including Islamic literature. Sheikh Hayat Sindhi was born in Sindh, He acquired basic early education from his father, and after that, he went to Thatta and received education from Muhammad Moin Thattavi and other renowned scholars of Thatta. Then he migrated to Harmain Shareef for higher education in Islamic disciplines. He chose to live in Madinah and started teaching at Masjid e Nabvi. He continued teaching of Hadith for 24 years in Masjid Nabvi at Madinah. He wrote many books on various topics of Islamic studies and the social problems of Muslim society. His books are well known and important amongst Islamic scholars, His books are rich with wisdom, etiquette and ethical values that have been abstracted and retrieved from the Holy Qur’an, Hadiths and jurisprudential approaches of prominent scholars and intellectual evidence. This study focuses on the brief biography of Sheikh Hayat Sindhi and his work in various fields of Islamic knowledge. This study is also undertaken in response to the deep sense of admiration and appreciation for the books of Sheikh Hayat Sindhi.
Modelling International Tourism Demand and Volatility in Small Island Tourism Economies
No full textSmall Island Tourism Economies (SITEs) vary in their size, land area, location, narrow resource bases, economic development, an overwhelming reliance on tourism, and a consistent inflow of foreign direct investment for economic growth. SITEs differ in their ethnic diversity, political systems, economic and environmental vulnerability, ecological fragility, and the risks facing investors. Owing to natural disasters, ethnic conflicts, crime, and the threat of global terrorism, there have been dramatic changes in the arrivals of international tourists to SITEs. These variations in international tourism demand to SITEs, particularly the conditional variance (or volatility) in international tourist arrivals, have not previously been analysed in the tourism research literature. An examination of the conditional volatility of international tourist arrivals is essential for policy analysis and marketing purposes. This paper models the conditional mean and conditional variance of the logarithm of monthly international tourist arrivals and the growth rate (or log-difference) in the monthly international tourist arrivals for six SITEs, namely Barbados, Cyprus, Dominica, Fiji, Maldives, and Seychelles. Diagnostic checks of the regularity conditions of the logarithm of monthly international tourist arrivals and their growth rates suggest that the estimated univariate models of trends and volatility are statistically adequate. Therefore, the estimated models are appropriate for purposes of public and private sector management of tourism. Acknowledgements: The authors wish to thank Felix Chan, Suhejla Hoti, Christine Lim and two anonymous referees for helpful comments and suggestions. The first author is most grateful for a UWA Research Grant, and the second author wishes to acknowledge financial support of Australian Research Council.Island economies, small size, vulnerability, international tourism demand, arrival rate, trends, volatility, time-varying conditional variance, GARCH, GJR, asymmetry, shocks, regularity conditions
Managing Value-at-Risk in Daily Tourist Tax Revenue for the Maldives
No full textInternational tourism is the principal economic activity for Small Island Tourism Economies (SITEs). There is a strongly predictable component of international tourism, specifically the government revenue received from taxes on international tourists, but it is difficult to predict the number of international tourist arrivals, which determines the magnitude of tax revenue receipts. A framework is presented for risk management of daily tourist tax revenues for the Maldives, which is a unique SITE because it relies almost entirely on tourism for its economic and social development. As international tourism receipts are significant financial assets to the economies of SITEs, the time-varying volatility of international tourist arrivals and their growth rate is analogous to the volatility (or dynamic risk) in financial returns. The volatility in the levels and growth rates of daily international tourist arrivals are investigated in the paper. This paper provides a template for the future analysis of earnings from international tourism, particularly tourism taxes for SITEs, discusses the direct and indirect monetary benefits from international tourism, highlights tourism taxes in the Maldives as a development financing phenomenon, and provides a framework for discussing the design and implementation of tourism taxes. Furthermore, it is demonstrated that the analysis developed in this paper can be used by the Maldivian Government in determining monetary and fiscal policy, by creditors to evaluate the risks associated with providing financial support to the Maldives, and by resort operators to decide whether to expand or contract their operations. Acknowledgements: The first author acknowledges the financial support of the Australian Research Council, the second author wishes to acknowledge a UWA Research Fellowship, and the third author is most grateful for the financial support of an International Postgraduate Research Scholarship and University Postgraduate Award at UWA. The authors wish to thank the Editor, two referees, Clive Granger, Matteo Manera and Juerg Weber for helpful comments and suggestions. An earlier version of this paper was presented at the Second International Conference on Tourism and Sustainable Development: Macro and Micro Economic Issues, Cagliari, Sardinia, Italy, September 2005.Small Island Tourism Economies (SITEs), international tourist arrivals, tourism tax, volatility, risk, Value-at-Risk (VaR), Sustainable Tourism@Risk (ST@R)
Hemorrhoid with a melanocytic nevus [7]
No full text[No abstract available]BRADY MS, 1995, DIS COLON RECTUM, V38, P146, DOI 10.1007-BF02052442; CLEMMENSEN OJ, 1991, HISTOPATHOLOGY, V18, P237, DOI 10.1111-j.1365-2559.1991.tb00831.x; Felz MW, 2001, SOUTHERN MED J, V94, P880; Maqbool A, 2004, CUTIS, V73, P409; MORENO SE, 2005, CLIN TRANSL ONCOL, V7, P1711
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