Hamid Ullah - Academia.edu (original) (raw)
Papers by Hamid Ullah
Abstract: A laboratory experiment was conducted to evaluate the response of sorghum germination t... more Abstract: A laboratory experiment was conducted to evaluate the response of sorghum germination to various sources and levels of osmopriming. The experiment was laid down in completely randomize design with four replications. In this research eight priming sources i.e. NaCl, CaCl2, KCl, KNO3, NH4Cl, Na2SO4, PEG and
Journal of Business & Tourism
Culture and climate of an organization is valued to gain competitive advantage in today’s modern ... more Culture and climate of an organization is valued to gain competitive advantage in today’s modern organizations. This study aimed to analyze the relative importance of Artifacts, Espoused Beliefs & Values and Basic Underlying Assumptions—the constituents of organization culture in relation to organization performance in Higher Education Institutes (HEIs) of district Peshawar. Cross-sectional data was collected from 250 employees of public and private sector universities working in drade-17 or above as teaching faculty or administrative staff using multi-stage cluster sampling technique. Findings indicated strong impact of constituents of organization cultural on organization performance and that the artifacts component has greater impact on organization performance than the other two components. Espoused beliefs and values have smaller impact than artifacts but greater impact than basic underlying assumptions and basic underlying assumptions have smallest impact. Thus leadership and ...
Journal of Business & Tourism
We live in the era of information communication society, where people are connected more than eve... more We live in the era of information communication society, where people are connected more than ever. Social media is becoming most trustable tool after word of mouth. The aim of this study was to examine participation of university level students in social marketing activities. The sample consisted of total 281 students, determined by circumstantial method. Questionnaire developed by the work of using the research of Korkmaz (2013), was used as data collection tools. Significant level was accepted as p<0.05 in statistical analysis. Independent t test, and structure equation modeling were used to assess the relationship among latent construct. Consequently, significant
Business Review
This paper has investigated the Efficient Market Hypothesis (EMH) through the concept of lead-lag... more This paper has investigated the Efficient Market Hypothesis (EMH) through the concept of lead-lag relationship of the future market prices and spot market prices in the context of Pakistani stock market. The study has used data of randomly selected one hundred and forty firms listed on the Karachi Stock Exchange from January 1995 to March 2012. Spot and future indices were developed from the closing prices through the Price-Weighted index method. First stationarity of the data was checked through Augmented-Dicky Fuller test; then GARCH (1,1) model was estimated for both the spot and future index returns in order to investigate the volatility in either of the index. The results of GARCH (1, 1) suggest that the impact of the previous day volatility in both the spot and future index has impact on the current day volatility. The future market price volatility has more prominent role to explain the spot market prices as compared to that of the explanatory power of the future market prices based on the spot market prices. Therefore, it is concluded based on the GARCH (1,1) there exists lead-lag relationship between the future and spot index where future market leads the spot market. Granger casualty test has been used to triangulate the results of GARCH (1,1) model. The results showed that future market Granger causes the spot market while the spot market does not Granger causes the future market. Thus, it can be concluded that it is the future market prices that lead the spot market prices and thus there exist a Lead-Lag relationship between the future and spot market prices in Karachi Stock Exchange and one can predict changes in spot market price based on the changes in the future market price. Moreover, these empirical results support the view that it’s the future market where information is created about the security prices and then it disseminates to the spot market.
Sustainable Business and Society in Emerging Economies
Purpose This study examined the effect of leverage, debt maturity on corporate financial performa... more Purpose This study examined the effect of leverage, debt maturity on corporate financial performance of non-financial firms listed at the Pakistan Stock Exchange. Targeted population of this study was 100 firm listed at PSX as KSE-100 index out of which 74 non-financial firms were selected from 28 different sectors for the period of 5 years 2013 to 2017. Design/Methodology/Approach: Financial performance measured by ROA, ROE, while leverage, short term leverage, long term leverage taken as independent variables, four variables were taken as control which are size, current ratio, sale growth, tangibility. On the basis of Hausman test, results of random effect model were found appropriate. Findings: ST and LT Leverage have a negative significant and insignificant effect on financial performance (ROA) respectively, moreover long term leverage has a positive and significant but short has a negative and insignificant effect on ROE. The results of the control variables showed that size ha...
The Journal of Contemporary Issues in Business and Government, 2021
Driving under the influence of fatigue and drowsiness is one of the leading causes of accidents t... more Driving under the influence of fatigue and drowsiness is one of the leading causes of accidents throughout the world. The United States Department of Transportation (USDOT) estimates that every year driver fatigue causes close to 100,000 crashes in the United States. These accidents results in1,544 fatalities, 71,000 injuries, and 12.5billioninmonetarylossesintheUSalone.Aroundtheworld,thousandsoflivesarelosteachdayduetoroadaccidents.TheNationalRoadSafetySecretariat(NRSS)Pakistanestimates,theannualeconomiccostofhighwaycrashesoverrupeesonehundredbillion(overUS12.5 billion in monetary losses in the US alone. Around the world, thousands of lives are lost each day due to road accidents. The National Road Safety Secretariat (NRSS) Pakistan estimates, the annual economic cost of highway crashes over rupees one hundred billion (over US12.5billioninmonetarylossesintheUSalone.Aroundtheworld,thousandsoflivesarelosteachdayduetoroadaccidents.TheNationalRoadSafetySecretariat(NRSS)Pakistanestimates,theannualeconomiccostofhighwaycrashesoverrupeesonehundredbillion(overUS 1.6 billion) for Pakistan. This paper provides a comprehensive review of the previous literature regarding driver fatigue and drowsiness research, the present state of research and the future trends. Various factors that may contribute to driverfatigue and drowsiness, Fatigue related countermeasures from various sources along with their merits are discussed. The Center for Intelligen...
Review of Economics and Development Studies
Currently emerging markets are passing through economic turmoil due to considerable increases in ... more Currently emerging markets are passing through economic turmoil due to considerable increases in the prices of oil and gold with significant variation in the foreign exchange market. All the macroeconomic variables are touching the highest value which was never occurred in the history of Pakistan. Taking advantages of the current situation the study has examined the impact of gold prices, oil prices and exchange rate on stock market performance. For this purpose, the study has used daily data of these macroeconomic variables for the period of 2003 to 2018. By using time series data analysis, it reveals that there is no co-integration or long-term relation among these variables; however, the vector autoregressive model showed significant short-term relation among the securities market performance, foreign exchange rate, prices of oil and gold. The analysis also suggests that significant changes in the prices of oil, foreign exchange rates and the prices of gold have a negative lagged...
negative returns shock in futures. This study has used CSR and advertising & publicity expenditur... more negative returns shock in futures. This study has used CSR and advertising & publicity expenditures as a measure of managerial myopia in financial sector that is rarely examined in case of emerging markets. Studies conducted on managerial myopia mainly focused on developed countries that are entirely different in regulatory framework, capital market efficiency, governance mechanisms and compensation practices in emerging markets provide ground for this investigation. CSR is an emerging phenomena rarely being studied in respect of managerial myopia in emerging markets.
Pakistan journal of pharmaceutical sciences, 2015
The present studies cover antibacterial activity of the crude methanolic extracts of 11 medicinal... more The present studies cover antibacterial activity of the crude methanolic extracts of 11 medicinal plants viz. Adhatoda vasica, Bauhenia variegate, Bombax ceiba, Carrisa opaca, Caryopteris grata, Debregeasia salicifolia, Lantana camara, Melia azedarach, Phyllanthus emblica, Pinus roxburghii and Olea ferruginea collected from lower Himalayas against two Gram positive (Staphylococcus aureus, Micrococcus luteus) and two Gram negative (Escherichia coli, Pseudomonas aureginosa) bacterial strains. The extracts were applied at four different concentrations (120 mg/mL, 90mg/mL, 60mg/mL and 30mg/mL) in dimethyl sulfoxide (DMSO) by using agar well diffusion method. Antibacterial activities against Staphylococcus aureus and Micrococcus luteus were observed formethanolic extracts of all the above mentioned plants. Greater antibacterial activity against Pseudomonas aeruginosa was only exhibited by Phyllanthus emblica, Pinus roxburghii, Debregeasia salicifolia and Lantana camara. Escherichia coli ...
Asian Journal of Chemistry, 2016
OBM Transplantation
Liver transplantation (LT) has grown monumentally in the last 40 years. Sarcopenia has emerged as... more Liver transplantation (LT) has grown monumentally in the last 40 years. Sarcopenia has emerged as an independent factor associated with increased mortality in patients with end stage liver disease. In this review we aim to shed light upon recent developments in assessment, clinical implications, management of sarcopenia in patients requiring a liver transplant. We also bring attention to the impact of COVID-19 pandemic on sarcopenia which ranges from the disease pathology to the unprecedented preventive measures taken during this time. Assessment tools to risk stratify and assess the degree of COVID related deconditioning in patients with end stage liver disease is an exigency. Management of sarcopenia requires a multifarious approach to address nutritional factors, exercise and pharmacotherapy. We may have to shift gears to focus on more rigorous rehabilitation and nutritional techniques during the times of pandemic. Future studies should evaluate whether recovery of sarcopenia wit...
Journal of Applied and Emerging Sciences, 2019
Phosphate is non-renewable mineral. Estimated phosphate ores in Pakistan are 26 million ton of di... more Phosphate is non-renewable mineral. Estimated phosphate ores in Pakistan are 26 million ton of different range, low, average and high grade. In past, different methods were used for upgradation of phosphate ore worldwide. To make phosphate ore more valuable, one of the most dominant technique used is flotation. Assessed phosphate ores in Pakistan are 26 million of a wide range of grades. Diverse sorts of strategies were utilized as a part of past for the upgradation of phosphate mineral around the world. Considering this, froth flotation is also used as one of an attractive technique. The critical literature on preparing of phosphate ore is fundamentally survey. Froth floatation is utilized worldwide for the upgradation of phosphate ore. In light of the literature and portrayal of Ghari Habib Ullah (GHU), conservative flowsheet of upgradation was planned for GHU phosphate mineral. The ore is upgrade from 22.55% P2O5, 6% Fe2O3 to 30.22% P2O5, 2% < Fe2O3 with 60% Recovery.
This paper compares Linker and Dieterich models with Prakash models to simulate shear resistance.... more This paper compares Linker and Dieterich models with Prakash models to simulate shear resistance. One of the mathematical models on sliding friction was developed by Linker and Dieterich (1992) under quasistatic conditions using low normal stresses and low sliding velocities. Prakash (1998) developed mathematical models under High Speed Machining applications, using high normal stresses and high sliding velocities. Linker and Dieterich models show that a step change in normal stress causes a sudden change in shear stress, while Prakash models show that a step change in normal pressure gives an exponential change of the shear stress to a new steady stale, characteristic of the current normal pressure and the current slip velocity. Prakash models have been found suitable for simulation of shear resistance at tool-workpiece interface during high speed machining applications.
Journal of Engineering and Applied Sciences , University of Engineering and Technology, Peshawar, 2010
This paper describes the implementation of reliable group communication in Java. The underlying d... more This paper describes the implementation of reliable group communication in Java. The underlying delivery mechanism for multicast is presently based on User Datagram Protocol (UDP) that provides a “best effort” delivery service. Best effort implies that IP packets are treated with essentially equal weight, and while IP makes an effort to deliver all packets to their destination, packets may occasionally be delayed, lost, duplicated, or delivered out of order. One of multicast’s weaknesses is its lack of reliability due to its use of UDP for data transmission. Reliable transmission means that there should be no packet loss, no disordering and no duplication of packets at the receiver side. The focus of this paper is to implement Reliable Multicast using Java, which is mainly used for one-to-many connections. This work focuses on reliable multicast in a local area network (LAN) environment. The reliability has been introduced at application layer and is receiver’s initiated, NACK (nega...
JPMA. The Journal of the Pakistan Medical Association, 2011
OBJECTIVE To compare the clinical outcomes of a loading dose regimen of quinine with a uniform do... more OBJECTIVE To compare the clinical outcomes of a loading dose regimen of quinine with a uniform dose regimen in patients with severe falciparum malaria. METHODS A retrospective chart review of 315 patients admitted with severe falciparum malaria and treated with quinine at a tertiary care teaching hospital of Karachi, Pakistan during 1999-2006 was conducted. Group A with 103 patients (32.7%) was given an initial loading dose of quinine while group B with 212 patients (67.3%) did not receive the loading dose. The two groups were compared in terms of reduction of parasite load, resolution of fever, recovery of consciousness and incidence of adverse effects. Outcome parameters were measured on the third day of therapy. RESULTS More individuals in group A (62.1%) were afebrile as compared to group B (54.7%) at day 3 of therapy. Patients in group B showed greater reduction in parasitaemia (47.2% at baseline to 4.7% on day 3) as compared to group A (56.3 % at baseline to 9.7% on day 3). Fo...
The study investigates the indicators that effect women’s economic empowerment. The data collecte... more The study investigates the indicators that effect women’s economic empowerment. The data collected through questionnaires, with 350 sample dimension. Pragmatic results expose that enrolment of female in education, decision making power, decision concerning household asset and economic opportunities have positive effected on WEE and significant. Participation in economy & educational retrieve hold positive and insignificant effect on WEE due to limited access to educationalists, masculinity basis, male dominancy etc. Problems of socio-cultural, poverty have negative and insignificant effect on WEE because of cultural restrictions; female workers are bounded to teaching field & functioning in their own lands. Finally, the recommendations of the study are that free access should be given to women for education regardless of ethnicity, sexual partialities and may be allowed to work along their male equivalents in order to raise the level of economic empowerment of women. The same will s...
Zeitschrift für Naturforschung C
In the present study, copper (II) complex of 4, 4′-di-tert-butyl-2,2′-bipyridine [Cu (C18H24N2) (... more In the present study, copper (II) complex of 4, 4′-di-tert-butyl-2,2′-bipyridine [Cu (C18H24N2) (NO3)2], 1 is investigated through its synthesis and characterization using elemental analysis technique, infra-red spectroscopy, and single-crystal analysis. The compound 1 crystallizes in orthorhombic space group P212121. The copper atom in the mononuclear complex is hexa coordinated through two nitrogen and four oxygen atoms from bipyridine ligand and nitrate ligands. The thermal analysis depicts the stability of the entitled compound up to 170 °C, and the decomposition takes place in different steps between 170 and 1000 °C. Furthermore, quantum chemical techniques are used to study optoelectronic, nonlinear optical, and therapeutic bioactivity. The values of isotropic and anisotropic linear polarizabilities of compound 1 are calculated as 41.65 × 10−24 and 23.02 × 10−24 esu, respectively. Likewise, the static hyperpolarizability is calculated as 47.92 × 10−36 esu using M06 functional ...
Syed Hamid Ali Shah, Attaullah Shah, Muhammad Kamran Khan, Hamid Ullah, Quaid-e-Azam College of C... more Syed Hamid Ali Shah, Attaullah Shah, Muhammad Kamran Khan, Hamid Ullah, Quaid-e-Azam College of Commerce, University of Peshawar, Pakistan, hamidqcc@upesh.edu.pk Institute of Management Sciences, Peshawar, Pakistan, attaullah.shah@imsciences.edu.pk Bacha Khan University, Charsadda, Pakistan, drkamrankhan@bkuc.edu.pk Islamia College University, Peshawar, Pakistan, hamidullah@icp.edu.pk ARTICLE DETAILS ABSTRACT History Revised format: February 2021 Available Online: March 2021 In this study, we try to answer several empirical questions related to testing of asset pricing models in Pakistan. First, we test the assumptions of capital asset pricing model (CAPM) using crosssectional regression methodology of Fama and MacBeth (FMB) (1973). Second, we test the conditional relationship between beta and expected returns using FMB cross-sectional regressions. Third, we test and compare the explanatory power of CAPM and Fama and French (1993) three factor models using time-series regressions. F...
Abstract: A laboratory experiment was conducted to evaluate the response of sorghum germination t... more Abstract: A laboratory experiment was conducted to evaluate the response of sorghum germination to various sources and levels of osmopriming. The experiment was laid down in completely randomize design with four replications. In this research eight priming sources i.e. NaCl, CaCl2, KCl, KNO3, NH4Cl, Na2SO4, PEG and
Journal of Business & Tourism
Culture and climate of an organization is valued to gain competitive advantage in today’s modern ... more Culture and climate of an organization is valued to gain competitive advantage in today’s modern organizations. This study aimed to analyze the relative importance of Artifacts, Espoused Beliefs & Values and Basic Underlying Assumptions—the constituents of organization culture in relation to organization performance in Higher Education Institutes (HEIs) of district Peshawar. Cross-sectional data was collected from 250 employees of public and private sector universities working in drade-17 or above as teaching faculty or administrative staff using multi-stage cluster sampling technique. Findings indicated strong impact of constituents of organization cultural on organization performance and that the artifacts component has greater impact on organization performance than the other two components. Espoused beliefs and values have smaller impact than artifacts but greater impact than basic underlying assumptions and basic underlying assumptions have smallest impact. Thus leadership and ...
Journal of Business & Tourism
We live in the era of information communication society, where people are connected more than eve... more We live in the era of information communication society, where people are connected more than ever. Social media is becoming most trustable tool after word of mouth. The aim of this study was to examine participation of university level students in social marketing activities. The sample consisted of total 281 students, determined by circumstantial method. Questionnaire developed by the work of using the research of Korkmaz (2013), was used as data collection tools. Significant level was accepted as p<0.05 in statistical analysis. Independent t test, and structure equation modeling were used to assess the relationship among latent construct. Consequently, significant
Business Review
This paper has investigated the Efficient Market Hypothesis (EMH) through the concept of lead-lag... more This paper has investigated the Efficient Market Hypothesis (EMH) through the concept of lead-lag relationship of the future market prices and spot market prices in the context of Pakistani stock market. The study has used data of randomly selected one hundred and forty firms listed on the Karachi Stock Exchange from January 1995 to March 2012. Spot and future indices were developed from the closing prices through the Price-Weighted index method. First stationarity of the data was checked through Augmented-Dicky Fuller test; then GARCH (1,1) model was estimated for both the spot and future index returns in order to investigate the volatility in either of the index. The results of GARCH (1, 1) suggest that the impact of the previous day volatility in both the spot and future index has impact on the current day volatility. The future market price volatility has more prominent role to explain the spot market prices as compared to that of the explanatory power of the future market prices based on the spot market prices. Therefore, it is concluded based on the GARCH (1,1) there exists lead-lag relationship between the future and spot index where future market leads the spot market. Granger casualty test has been used to triangulate the results of GARCH (1,1) model. The results showed that future market Granger causes the spot market while the spot market does not Granger causes the future market. Thus, it can be concluded that it is the future market prices that lead the spot market prices and thus there exist a Lead-Lag relationship between the future and spot market prices in Karachi Stock Exchange and one can predict changes in spot market price based on the changes in the future market price. Moreover, these empirical results support the view that it’s the future market where information is created about the security prices and then it disseminates to the spot market.
Sustainable Business and Society in Emerging Economies
Purpose This study examined the effect of leverage, debt maturity on corporate financial performa... more Purpose This study examined the effect of leverage, debt maturity on corporate financial performance of non-financial firms listed at the Pakistan Stock Exchange. Targeted population of this study was 100 firm listed at PSX as KSE-100 index out of which 74 non-financial firms were selected from 28 different sectors for the period of 5 years 2013 to 2017. Design/Methodology/Approach: Financial performance measured by ROA, ROE, while leverage, short term leverage, long term leverage taken as independent variables, four variables were taken as control which are size, current ratio, sale growth, tangibility. On the basis of Hausman test, results of random effect model were found appropriate. Findings: ST and LT Leverage have a negative significant and insignificant effect on financial performance (ROA) respectively, moreover long term leverage has a positive and significant but short has a negative and insignificant effect on ROE. The results of the control variables showed that size ha...
The Journal of Contemporary Issues in Business and Government, 2021
Driving under the influence of fatigue and drowsiness is one of the leading causes of accidents t... more Driving under the influence of fatigue and drowsiness is one of the leading causes of accidents throughout the world. The United States Department of Transportation (USDOT) estimates that every year driver fatigue causes close to 100,000 crashes in the United States. These accidents results in1,544 fatalities, 71,000 injuries, and 12.5billioninmonetarylossesintheUSalone.Aroundtheworld,thousandsoflivesarelosteachdayduetoroadaccidents.TheNationalRoadSafetySecretariat(NRSS)Pakistanestimates,theannualeconomiccostofhighwaycrashesoverrupeesonehundredbillion(overUS12.5 billion in monetary losses in the US alone. Around the world, thousands of lives are lost each day due to road accidents. The National Road Safety Secretariat (NRSS) Pakistan estimates, the annual economic cost of highway crashes over rupees one hundred billion (over US12.5billioninmonetarylossesintheUSalone.Aroundtheworld,thousandsoflivesarelosteachdayduetoroadaccidents.TheNationalRoadSafetySecretariat(NRSS)Pakistanestimates,theannualeconomiccostofhighwaycrashesoverrupeesonehundredbillion(overUS 1.6 billion) for Pakistan. This paper provides a comprehensive review of the previous literature regarding driver fatigue and drowsiness research, the present state of research and the future trends. Various factors that may contribute to driverfatigue and drowsiness, Fatigue related countermeasures from various sources along with their merits are discussed. The Center for Intelligen...
Review of Economics and Development Studies
Currently emerging markets are passing through economic turmoil due to considerable increases in ... more Currently emerging markets are passing through economic turmoil due to considerable increases in the prices of oil and gold with significant variation in the foreign exchange market. All the macroeconomic variables are touching the highest value which was never occurred in the history of Pakistan. Taking advantages of the current situation the study has examined the impact of gold prices, oil prices and exchange rate on stock market performance. For this purpose, the study has used daily data of these macroeconomic variables for the period of 2003 to 2018. By using time series data analysis, it reveals that there is no co-integration or long-term relation among these variables; however, the vector autoregressive model showed significant short-term relation among the securities market performance, foreign exchange rate, prices of oil and gold. The analysis also suggests that significant changes in the prices of oil, foreign exchange rates and the prices of gold have a negative lagged...
negative returns shock in futures. This study has used CSR and advertising & publicity expenditur... more negative returns shock in futures. This study has used CSR and advertising & publicity expenditures as a measure of managerial myopia in financial sector that is rarely examined in case of emerging markets. Studies conducted on managerial myopia mainly focused on developed countries that are entirely different in regulatory framework, capital market efficiency, governance mechanisms and compensation practices in emerging markets provide ground for this investigation. CSR is an emerging phenomena rarely being studied in respect of managerial myopia in emerging markets.
Pakistan journal of pharmaceutical sciences, 2015
The present studies cover antibacterial activity of the crude methanolic extracts of 11 medicinal... more The present studies cover antibacterial activity of the crude methanolic extracts of 11 medicinal plants viz. Adhatoda vasica, Bauhenia variegate, Bombax ceiba, Carrisa opaca, Caryopteris grata, Debregeasia salicifolia, Lantana camara, Melia azedarach, Phyllanthus emblica, Pinus roxburghii and Olea ferruginea collected from lower Himalayas against two Gram positive (Staphylococcus aureus, Micrococcus luteus) and two Gram negative (Escherichia coli, Pseudomonas aureginosa) bacterial strains. The extracts were applied at four different concentrations (120 mg/mL, 90mg/mL, 60mg/mL and 30mg/mL) in dimethyl sulfoxide (DMSO) by using agar well diffusion method. Antibacterial activities against Staphylococcus aureus and Micrococcus luteus were observed formethanolic extracts of all the above mentioned plants. Greater antibacterial activity against Pseudomonas aeruginosa was only exhibited by Phyllanthus emblica, Pinus roxburghii, Debregeasia salicifolia and Lantana camara. Escherichia coli ...
Asian Journal of Chemistry, 2016
OBM Transplantation
Liver transplantation (LT) has grown monumentally in the last 40 years. Sarcopenia has emerged as... more Liver transplantation (LT) has grown monumentally in the last 40 years. Sarcopenia has emerged as an independent factor associated with increased mortality in patients with end stage liver disease. In this review we aim to shed light upon recent developments in assessment, clinical implications, management of sarcopenia in patients requiring a liver transplant. We also bring attention to the impact of COVID-19 pandemic on sarcopenia which ranges from the disease pathology to the unprecedented preventive measures taken during this time. Assessment tools to risk stratify and assess the degree of COVID related deconditioning in patients with end stage liver disease is an exigency. Management of sarcopenia requires a multifarious approach to address nutritional factors, exercise and pharmacotherapy. We may have to shift gears to focus on more rigorous rehabilitation and nutritional techniques during the times of pandemic. Future studies should evaluate whether recovery of sarcopenia wit...
Journal of Applied and Emerging Sciences, 2019
Phosphate is non-renewable mineral. Estimated phosphate ores in Pakistan are 26 million ton of di... more Phosphate is non-renewable mineral. Estimated phosphate ores in Pakistan are 26 million ton of different range, low, average and high grade. In past, different methods were used for upgradation of phosphate ore worldwide. To make phosphate ore more valuable, one of the most dominant technique used is flotation. Assessed phosphate ores in Pakistan are 26 million of a wide range of grades. Diverse sorts of strategies were utilized as a part of past for the upgradation of phosphate mineral around the world. Considering this, froth flotation is also used as one of an attractive technique. The critical literature on preparing of phosphate ore is fundamentally survey. Froth floatation is utilized worldwide for the upgradation of phosphate ore. In light of the literature and portrayal of Ghari Habib Ullah (GHU), conservative flowsheet of upgradation was planned for GHU phosphate mineral. The ore is upgrade from 22.55% P2O5, 6% Fe2O3 to 30.22% P2O5, 2% < Fe2O3 with 60% Recovery.
This paper compares Linker and Dieterich models with Prakash models to simulate shear resistance.... more This paper compares Linker and Dieterich models with Prakash models to simulate shear resistance. One of the mathematical models on sliding friction was developed by Linker and Dieterich (1992) under quasistatic conditions using low normal stresses and low sliding velocities. Prakash (1998) developed mathematical models under High Speed Machining applications, using high normal stresses and high sliding velocities. Linker and Dieterich models show that a step change in normal stress causes a sudden change in shear stress, while Prakash models show that a step change in normal pressure gives an exponential change of the shear stress to a new steady stale, characteristic of the current normal pressure and the current slip velocity. Prakash models have been found suitable for simulation of shear resistance at tool-workpiece interface during high speed machining applications.
Journal of Engineering and Applied Sciences , University of Engineering and Technology, Peshawar, 2010
This paper describes the implementation of reliable group communication in Java. The underlying d... more This paper describes the implementation of reliable group communication in Java. The underlying delivery mechanism for multicast is presently based on User Datagram Protocol (UDP) that provides a “best effort” delivery service. Best effort implies that IP packets are treated with essentially equal weight, and while IP makes an effort to deliver all packets to their destination, packets may occasionally be delayed, lost, duplicated, or delivered out of order. One of multicast’s weaknesses is its lack of reliability due to its use of UDP for data transmission. Reliable transmission means that there should be no packet loss, no disordering and no duplication of packets at the receiver side. The focus of this paper is to implement Reliable Multicast using Java, which is mainly used for one-to-many connections. This work focuses on reliable multicast in a local area network (LAN) environment. The reliability has been introduced at application layer and is receiver’s initiated, NACK (nega...
JPMA. The Journal of the Pakistan Medical Association, 2011
OBJECTIVE To compare the clinical outcomes of a loading dose regimen of quinine with a uniform do... more OBJECTIVE To compare the clinical outcomes of a loading dose regimen of quinine with a uniform dose regimen in patients with severe falciparum malaria. METHODS A retrospective chart review of 315 patients admitted with severe falciparum malaria and treated with quinine at a tertiary care teaching hospital of Karachi, Pakistan during 1999-2006 was conducted. Group A with 103 patients (32.7%) was given an initial loading dose of quinine while group B with 212 patients (67.3%) did not receive the loading dose. The two groups were compared in terms of reduction of parasite load, resolution of fever, recovery of consciousness and incidence of adverse effects. Outcome parameters were measured on the third day of therapy. RESULTS More individuals in group A (62.1%) were afebrile as compared to group B (54.7%) at day 3 of therapy. Patients in group B showed greater reduction in parasitaemia (47.2% at baseline to 4.7% on day 3) as compared to group A (56.3 % at baseline to 9.7% on day 3). Fo...
The study investigates the indicators that effect women’s economic empowerment. The data collecte... more The study investigates the indicators that effect women’s economic empowerment. The data collected through questionnaires, with 350 sample dimension. Pragmatic results expose that enrolment of female in education, decision making power, decision concerning household asset and economic opportunities have positive effected on WEE and significant. Participation in economy & educational retrieve hold positive and insignificant effect on WEE due to limited access to educationalists, masculinity basis, male dominancy etc. Problems of socio-cultural, poverty have negative and insignificant effect on WEE because of cultural restrictions; female workers are bounded to teaching field & functioning in their own lands. Finally, the recommendations of the study are that free access should be given to women for education regardless of ethnicity, sexual partialities and may be allowed to work along their male equivalents in order to raise the level of economic empowerment of women. The same will s...
Zeitschrift für Naturforschung C
In the present study, copper (II) complex of 4, 4′-di-tert-butyl-2,2′-bipyridine [Cu (C18H24N2) (... more In the present study, copper (II) complex of 4, 4′-di-tert-butyl-2,2′-bipyridine [Cu (C18H24N2) (NO3)2], 1 is investigated through its synthesis and characterization using elemental analysis technique, infra-red spectroscopy, and single-crystal analysis. The compound 1 crystallizes in orthorhombic space group P212121. The copper atom in the mononuclear complex is hexa coordinated through two nitrogen and four oxygen atoms from bipyridine ligand and nitrate ligands. The thermal analysis depicts the stability of the entitled compound up to 170 °C, and the decomposition takes place in different steps between 170 and 1000 °C. Furthermore, quantum chemical techniques are used to study optoelectronic, nonlinear optical, and therapeutic bioactivity. The values of isotropic and anisotropic linear polarizabilities of compound 1 are calculated as 41.65 × 10−24 and 23.02 × 10−24 esu, respectively. Likewise, the static hyperpolarizability is calculated as 47.92 × 10−36 esu using M06 functional ...
Syed Hamid Ali Shah, Attaullah Shah, Muhammad Kamran Khan, Hamid Ullah, Quaid-e-Azam College of C... more Syed Hamid Ali Shah, Attaullah Shah, Muhammad Kamran Khan, Hamid Ullah, Quaid-e-Azam College of Commerce, University of Peshawar, Pakistan, hamidqcc@upesh.edu.pk Institute of Management Sciences, Peshawar, Pakistan, attaullah.shah@imsciences.edu.pk Bacha Khan University, Charsadda, Pakistan, drkamrankhan@bkuc.edu.pk Islamia College University, Peshawar, Pakistan, hamidullah@icp.edu.pk ARTICLE DETAILS ABSTRACT History Revised format: February 2021 Available Online: March 2021 In this study, we try to answer several empirical questions related to testing of asset pricing models in Pakistan. First, we test the assumptions of capital asset pricing model (CAPM) using crosssectional regression methodology of Fama and MacBeth (FMB) (1973). Second, we test the conditional relationship between beta and expected returns using FMB cross-sectional regressions. Third, we test and compare the explanatory power of CAPM and Fama and French (1993) three factor models using time-series regressions. F...