Wyniki wyszukiwania - Biblioteka Nauki

1

Prediction of Blended Yarn Evenness and Tensile Properties by Using Artificial Neural Network and Multiple Linear Regression

100%

Malik S. A. , Farooq A. , Gereke T. , Cherif C.

Autex Research Journal

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2016

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tom Vol. 16, no. 2

43--50

EN

The present research work was carried out to develop the prediction models for blended ring spun yarn evenness and tensile parameters using artificial neural networks (ANNs) and multiple linear regression (MLR). Polyester/cotton blend ratio, twist multiplier, back roller hardness and break draft ratio were used as input parameters to predict yarn evenness in terms of CVm% and yarn tensile properties in terms of tenacity and elongation. Feed forward neural networks with Bayesian regularisation support were successfully trained and tested using the available experimental data. The coefficients of determination of ANN and regression models indicate that there is a strong correlation between the measured and predicted yarn characteristics with an acceptable mean absolute error values. The comparative analysis of two modelling techniques shows that the ANNs perform better than the MLR models. The relative importance of input variables was determined using rank analysis through input saliency test on optimised ANN models and standardised coefficients of regression models. These models are suitable for yarn manufacturers and can be used within the investigated knowledge domain.

2

Effect of D-mannose on antioxidant defense and oxidative processes in etiolated wheat coleoptiles

100%

Hameed A. , Iqbal N. , Malik S. A.

Acta Physiologiae Plantarum

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2014

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tom 36

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nr 01

EN

Effect of D-mannose treatment on different antioxidants, phenolics, protease activity, lipid peroxidation, DNA damage and cell death was investigated in coleoptiles of etiolated wheat seedlings. Modulations in these biochemical parameters were monitored up to 96 h after treatment at 24 h intervals. With accelerating effect on initial signs of cell death, i.e., appearance of long DNA fragmentation and no effect on initiation of terminal stage, i.e., internucleosomal nDNA fragmentation, mannose treatment (1 % = 56 mM) diminished the antioxidant activities in wheat coleoptiles. Mannose treatment decreased the catalase activity at all intervals, while APX and POD activities decreased at 72 h. Peroxidation of lipids increased at 72 h after mannose treatment. Levels of most of antioxidants, i.e., SOD, peroxidases and phenolics were raised during initial time period (24–48 h) of mannose treatment probably as an attempt to counter the stress effect. Protease activity gradually increased and protein content decreased with time in both treated and non-treated coleoptiles. Sharp decrease in CAT, APX and peroxidase activities and increase in lipid peroxidation at 72 h overlaps with apoptotic internucleosomal nDNA fragmentation in this organ. This coincidence points towards the importance of compromised antioxidant defense and involvement of reactive oxygen species in initiation of terminal stage of programmed cell death in wheat coleoptile. In conclusion, accelerating effect on DNA fragmentation and lipid peroxidation along with diminished antioxidant activities at the time of internucleosomal nDNA fragmentation, provide evidence for pro-apoptotic effect of D-mannose in wheat coleoptile.

3

Minimizing Unnecessary Handovers in a Heterogeneous Network Environment

88%

Hussain R. , Malik S. A. , Riaz S. A. , Abrar S. , Khan S. A.

Przegląd Elektrotechniczny

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2012

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tom R. 88, nr 6

300-303

EN

In this paper, we have provided a model to minimize the unnecessary handovers from a cellular network to a WLAN. Exploiting traveling distance prediction method, the proposed handover necessity estimation mechanism uses distance threshold parameters to avoid unnecessary handovers. Our analysis and simulation results suggest that the proposed mechanism can keep the probabilities of handover failure and unnecessary handover close to the predetermined designed values.

PL

Przedstawiono model umożliwiający minimalizowanie niepotrzebnych przełączeń typu handover między siecią komórkowa a siecią bezprzewodową WLAN.

4

Genetic diversity in human malaria parasites of Khyber Agency Pakistan

88%

Khatoon L. , Jan M. I. , Khan I. U. , Ullah F. , Malik S. A.

Acta Parasitologica

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2013

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tom 58

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nr 4

EN

Malaria is wide spread in poor world and its burden has been assessed by the enumeration of malarial parasites in blood of patients. This study was designed to find a relationship between social structure, and spread of malaria in Khyber agency. The average parasite density was 2050 parasite/μl in Khyber Agency. Due to economic and social setup most of the people have habit of sleeping in open air thus playing role in high malaria prevalence and Plasmodium vivax remains the prevalent species. Genetic study performed on 110 Blood samples showed less genetic diversity for both Plasmodium vivax and Plasmodium falciparum. Eight alleles were distinguished both for Pvmsp 3α and Pvmsp 3β in total of 20 and 39 amplified samples of P. vivax respectively. Out of 17 samples amplified for P. falciparum 11 showed genotype K1 and 10 for MAD at Pfmsp-1 while 14 alleles were identified for 3D7/1C and two for FC27 of corresponding families of Pfmsp-2 gene. This shows that Plasmodium parasites are not genetically diverse in Khyber agency.

5

Prediction of the Porosity of Barrier Woven Fabrics with Respect to Material, Construction and Processing Parameters and Its Relation with Air Permeability

88%

Malik S. A. , Kocaman R. T. , Gereke T. , Aibibu D. , Cherif C.

Fibres & Textiles in Eastern Europe

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2018

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tom Vol. 26, no. 3 (129)

71--79

EN

Porosity is one of the most important characteristics of fabrics that dictate the permeability and retention properties of fabrics. Several technical uses require textiles with a combination of definite permeability and retention properties. Besides filtration, surgical textiles require these contrary properties to offer an effective barrier against particle laden fluids, such as bacteria and viruses, together with added wearer comfort. Pore size and pore size distribution are important characteristics to determine the permeability and retention behaviour of multifilament barrier textiles by influencing the effective porosity, which can be tailored according to end use requirements by material, weave construction and processing factors. The present research was aimed at developing the relationship that material, construction and loom parameters have with porosity in terms of the mean pore size and mean flow pore size of the fabric, and thereby with air permeability. To map such nonlinear complex relations, an artificial neural network (ANN) was employed. From the findings, it was observed that the porosity of barrier fabrics can be predicted with excellent accuracy using an ANN.

PL

Porowatość jest jedną z najważniejszych cech tkanin, które decydują o przepuszczalności i właściwościach retencyjnych tkanin. Zastosowania techniczne wymagają tekstyliów z kombinacją określonej przepuszczalności i właściwości retencyjnych. Oprócz filtracji, tekstylia chirurgiczne muszą charakteryzowac się właściwościami zapewniającymi skuteczną barierę przeciwko płynom z cząstkami objętościowymi, takim jak bakterie i wirusy oraz zapewniać komfort użytkowania. Wielkość porów i rozkład wielkości porów są ważnymi cechami określającymi przepuszczalności i zachowanie retencyjne tkanin barierowych wielowłókienkowych. Przeprowadzone badania miały na celu rozwinięcie związku pomiędzy parametrami materiału i konstrukcji z porowatością w kategoriach średniej wielkości porów, a tym samym z przepuszczalnością powietrza. Aby zmapować takie nieliniowe złożone relacje, zastosowano sztuczną sieć neuronową (ANN). Z ustaleń zaobserwowano, że porowatość tkanin barierowych można przewidzieć z doskonałą dokładnością za pomocą SSN.

6

A Host Based Autonomous Scheme for Seamless Vertical Handover

63%

Hussain R. , Malik S. A. , Riaz R. A. , Ahmed S. , Shafiq G. , Iqbal A. , Abrar S. , Khan S. A.

Przegląd Elektrotechniczny

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2012

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tom R. 88, nr 9b

314-318

EN

In this paper we suggest a host based, end-to-end selfreliant scheme for handover in heterogeneous network environment. It directly involves the correspondent node in the handover process. The proposed scheme imitates the Network Address Translation. It maps a logical address to another logical address. It modifies the address information in the header of the packet while it is in transition. In principle the process is identical to the NAT box operation, but the goal is different. While NAT is primarily used in conjunction with masquerading to hide the private IP address space, HaMAT works in conjunction with MIH and serves to hide the IP address change of the mobile node encountered due to the vertical handover. HaMAT is a functional entity just like Media Independent Handover Function, and it resides inside the Mobile Node and Correspondent Node. By eliminating the need for rerouting, tunneling and route optimization as required in Mobile IP, HaMAT achieves high performance results in terms of handover delay, end to end packet latency, jitter and the overhead involved. The service disruption time for HaMAT is as low as 10 msec compared to reported handover delays of 260 msec and 1 sec for MIPv4 and MIPv6 respectively.

PL

W artykule zaproponowano bazujący na hoście schemat przełączania typu handover w niejednorodnym środowisku sieciowym. Schemat imituje Network Address Translation i mapuje logiczny adres orasz modyfikuje nagłówek w pakiecie.