Marginal distribution of crossing time and renewal numbers related with two-state Erlang process

Talpur, Mir Ghulam Hyder,Zamir, Iffat,Ali, M. Masoom The Korean Data and Information Science Society 2009 한국데이터정보과학회지 Vol.20 No.1

In this study, we drive the one dimensional marginal transform function, probability density function and probability distribution function for the random variables $T_{{\xi}N}$ (Time taken by the servers during the vacations), ${\xi}_N$(Number of vacations taken by the servers) and ${\eta}_N$(Number of customers or units arrive in the system) by controlling the variability of two random variables simultaneously.

Ecology and Behavior : Relative Population of Mango Hopper Species on Different Mango Varieties

( Muzaffar A. Talpur ),( Rab Dino Khuhro ) 한국응용곤충학회 2003 Journal of Asia-Pacific Entomology Vol.6 No.2

Relative Occurrence and Abundance of Mustard Aphid, Lipaphis erysimi (Kalt.) and Their Predators on Rainbow and Oscar Canola Varieties

Muzaffar A. Talpur,Khuhro, Rab-Dino Korean Society of Applied Entomology 2004 Journal of Asia-Pacific Entomology Vol.7 No.2

The studies on the relative occurrence and abundance of mustard aphid, Lipaphis erysimi (Kalt.) revealed that aphid appeared on leaves during 3rd week of January and on the inflorescences during 2nd week of February and continued up to harvesting on both the varieties. The peak populations (42.7) and (28.7) per leaf on Rainbow and Oscar varieties were recorded. Whereas, the peak populations (7.5) and (6.6) per inflorescences were recorded on these varieties. The higher mean population ranges (9.2 to 28.7) and (25.1 to 42.7) per leaf on Oscar and Rainbow and (3.9 to 6.6) and (2.3 to 7.6) per inflorescence were recorded from February 15 to March 5. The temperature range of 16.5 to $20.6^{\circ}$, seems to have favored the pest multiplication. The predator species such as, green lacewing beetle, Chrysoperla carnea (Stephens), eleven-spotted ladybird beetle, Coccinella undecimpunctata (Linn.) and seven-spotted ladybird beetle, Coccinella septempunctata (Linn.) were recorded when the pest population of aphids was sufficiently developed on the canola varieties.

Willingness to Shift towards Biogas-fueled Bus Rapid Transit in Karachi, Pakistan

Farrukh Baig,Aqsa Talpur,Gopal Das,Mir Aftab Hussain Talpur,Jaeyoung Lee 대한토목학회 2024 KSCE Journal of Civil Engineering Vol.28 No.4

Traffic-related environmental pollution has emerged as a concerning issue due to the increasing number of privately owned vehicles. To encourage environmentally friendly mobility, a biogas-fueled bus rapid transit (BRT) has been implemented in Karachi, Pakistan. Nevertheless, the success of the BRT system depends on effectively attracting travelers to adopt this new mode of transportation. Thus, this study explores the factors affecting the public willingness to shift to the biogas-fueled BRT by applying the push-pull-mooring theory framework. A disjoint reflective-reflective second-order model was developed using the structural equation modeling technique. This study found that push factor (perceived inconvenience and perceived environmental threat), pull factor (green transport policies, biogas-fueled BRT system, and subjective norms), Mooring (inertia), and media influence (social media influence and traditional media influence) are the factors directly or indirectly affecting the willingness to shift towards biogas-fueled BRT in Karachi, Pakistan. This study sheds light on the importance of designing green transport policies and green infrastructure, developing positive subjective norms about biogas-fueled BRT, and enhancing a sense of convenience traveling through biogas-fueled BRT. Additionally, the study suggests that disseminating awareness about environmental threats and managerial applications to discourage using privately owned vehicles will help shift people toward biogas-fueled BRT.

Marginal distribution of crossing time and renewal numbers related with two-state Erlang process

Mir Ghulam Hyder Talpur,Iffat Zamir,M. Masoom Ali 한국데이터정보과학회 2009 한국데이터정보과학회지 Vol.20 No.1

In this study, we drive the one dimensional marginal transform function , probability density function and probability distribution function for the random variables (Time taken by the servers during the vacations), (Number of vacations taken by the servers) and ( Number of customers or units arrive in the system) by controlling the variability of two random variables simultaneously.

Studies on Plant Parasitic Nematodes Associated with Banana in Sindh, Pakistan

Pathan, M.A.,Talpur, Muzaffar A.,Jiskani, M.M.,Wagan, K.H. Korean Society of Applied Entomology 2004 Journal of Asia-Pacific Entomology Vol.7 No.2

A survey of banana was conducted to study the occurrence and distribution of plant parasitic nematodes. The samples of soil and banana plants showing retarded growth were collected from three fields of Nasimabad (Khisano Mori), Tando Allah Yar and Mirpurkhas. The nematodes isolated from the roots and soil samples showed the presence of seven genera of plant parasitic nematodes, Hoplolaimus columbus, Belonolaimus longicaudatus, Helicotylenchus dihystera, Meloidogyne incognita, Xiphinema brevicol/e, Longidorus africanus and Trichodorus christiei. The maximum population densities (M. P. D %) and maximum frequency occurrence (M. F. 0 %) and prominence values (P. V %) were calculated for each nematode genus. The M. P. D %, M. F. 0 % and P. V % of H columbus (lance nematode), B. longicaudatus (sting nematode), M incognita (root-knot nematode) and Heli. dihystera (spiral nematode) were higher than those of other nematodes. The occurrence of these nematodes in relatively high population suggests their potential role in reducing banana production.

Seasonal Migration and Overwintering Habitats of Chinch Bug (Hemiptera: Lygaeidae) in Northeastern Mississippi

Khuhro, Rab Dino,Talpur, Muzaffar A.,Davis, F.M.,Collison, C.H. Korean Society of Applied Entomology 2004 Journal of Asia-Pacific Entomology Vol.7 No.3

The chinch bug, Blissus leucopterus leucopterus (Say), has become an important early-season pest of corn, Zea mays L., in the southeastern United States. Information on overwintering of chinch bugs is available but it is primarily from studies conducted in the central and midwestern states. Studies were conducted to describe chinch bug overwintering sites, changes in population densities in bromesedge, Andropogon virginicus L., and the timing of spring and fall flights from and to overwintering sites in a northeastern Mississippi environment during a three year period. Adults were found to over winter in many sites on the study area. High numbers of chinch bugs were found to congregate in bromesedge plants along roadsides or within cut-over woodland. Adults began to move into bromesedge for overwintering in September, but the largest increase occurred in October. Winter mortality from December to the end of February was slight probably because of mild winters during the three year study. Adult numbers in bromesedge began to decline in March as insects began to leave the overwintering site, and the rate of evacuation increased rapidly as temperatures warmed in April. Significant negative correlations were found to exist between the decline in numbers of chinch bugs in bromesedge and spring daily average and maximum temperatures. Fall and spring flight to and from overwintering sites based on captures of adults on aerial traps were found to be in general agreement with the timing of adult increase and decline on bromesedge.

Studies on Plant Parasitic Nematodes Associated with Banana in Sindh, Pakistan

M. A. Pathan,Muzaffar A,Talpur, M. M. Jiskani,K. H. Wagan 한국응용곤충학회 2004 Journal of Asia-Pacific Entomology Vol.7 No.2

A survey of banana was conducted to study the occurrence and distribution of plant parasitic nematodes. The samples of soil and banana plants showing retarded growth were collected from three fields of Nasimabad (Khisano Mori), Tando Allah Yar and Mirpurkhas. The nematodes isolated from the roots and soil samples showed the presence of seven genera of plant parasitic nematodes, Hoplolaimus columbus, Belonolaimus longicaudatus, Helicotylenchus dihystera, Meloidogyne incognita, Xiphinema brevicolle, Longidorus africanus and Trichodorus christiei. The maximum population densities (M. P. D %) and maximum frequency occurrence (M. F. O %) and prominence values (P. V %) were calculated for each nematode genus. The M. P. D %, M. F. O % and P. V % of H. columbus (lance nematode), B. longicaudatus (sting nematode), M. incognita (root- knot nematode) and Heli. dihystera (spiral nematode) were higher than those of other nematodes. The occurrence of these nematodes in relatively high population suggests their potential role in reducing banana production.

Seasonal Migration and Overwintering Habitats of Chinch Bug (Hemiptera : Lygaeidae) in Northeastern Mississippi

Rab Dino Khuhro,Muzaffar A. Talpur,F.M. Davis,C.H. Collison 한국응용곤충학회 2004 Journal of Asia-Pacific Entomology Vol.7 No.3

The chinch bug, Blissus leucopterus leuco- pterus (Say), has become an important early-season pest of corn, Zea mays L., in the southeastern United States. Information on overwintering of chinch bugs is available but it is primarily from studies conducted in the central and midwestern states. Studies were conducted to describe chinch bug overwintering sites, changes in population densities in bromesedge, Andropogon virginicus L., and the timing of spring and fall flights from and to overwintering sites in a northeastern Mississippi environment during a three year period. Adults were found to over winter in many sites on the study area. High numbers of chinch bugs were found to congregate in bromesedge plants along roadsides or within cut-over woodland. Adults began to move into bromesedge for overwin- tering in September, but the largest increase occurred in October. Winter mortality from December to the end of February was slight probably because of mild winters during the three year study. Adult numbers in bromesedge began to decline in March as insects began to leave the overwintering site, and the rate of evacuation increased rapidly as temperatures warmed in April. Significant negative correlations were found to exist between the decline in numbers of chinch bugs in bromesedge and spring daily average and maximum temperatures. Fall and spring flight to and from overwintering sites based on captures of adults on aerial traps were found to be in general agreement with the timing of adult increase and decline on bromesedge.