2,425 research outputs found
Folio
No full textPrincipal's Message; Sajjad Zafar Irfani-Editorial. pp. 1; Amar Bin Adil-Article-A Poet's Search for Values. pp. 2-6; Arif A. Khan-Article-The House of God. pp. 7-10; Sajjad Zafar Irfani-Article-On Education. pp. 11-15; Tanvir Mohsin Khan-Essay-Success. pp. 16-17; Muhammad Asif-Ah! Exam. pp. 18-19; Mohayuddin Abu Bakar-Disillusionment. pp. 20-21; Gohar Majid Sheikh-Good Temper. pp. 22-23; Shahid Imtiaz-Poetry-Aspiration of Freedom. pp. 25; Sports: 96th Annual Athletic Championship, February 15-16, 1983. pp. 26-27; Dr. E. J. Sinclair Passes Away. pp. 30-31; Literacy. pp. 32-33; Folio '83 [Urdu-Punjabi]. 199 p.Quaid-e-Azam. after title; Prof Nasim Zakaria, Principal. after Principal's Message; Editors. before editorial; Dr E. J. Sinclair. before page 31; Prof Mir Muhammad Yaquib. after page 33; Department of Political Science. after page 33; Rana Iftikhar Ahmad, President Student Union. after page 33; Members of Student Union. after page 33; Editors (Urdu). before Urdu content
Fig. 3. A–F in Clitopilus cretoalbus sp. nov. (Entolomataceae, Agaricales), a new species from Pakistan
No full textFig. 3. A–F. Morphology of Clitopilus cretoalbus A.Izhar, Zaman, M.Asif, H.Bashir, Niazi & Khalid sp. nov. A–B. Basidiomata of Skp102 (holotype, LAH35709). C–D. Basidiomata of Skp106 (LAH37112) in natural habitat. E–F. Basidiomata of MN16 (LAH37017). Photographs by Aiman Izhar, Muhammad Asif & Zaman Khan. Scale bars = 10 mm.Published as part of Izhar, Aiman, Khan, Zaman, Asif, Muhammad, Bashir, Hira, Rani, Afifa Kainat, Niazi, Abdul Rehman & Khalid, Abdul Nasir, 2023, Clitopilus cretoalbus sp. nov. (Entolomataceae, Agaricales), a new species from Pakistan, pp. 168-184 in European Journal of Taxonomy 861 on page 177, DOI: 10.5852/ejt.2023.861.2075, http://zenodo.org/record/774659
A three dimensional age estimation using cone beam CT in Malaysian population / Muhammad Khan Asif
No full textForensic odontology plays a vital role in the age estimation and identification process
during criminal investigations. Forensic science in the past have mainly employed two-dimensional (2D) radiographic assessment of developmental and physiological age
related dental parameters for age estimation. However, 2D radiograph doesn’t represent
the three-dimensional (3D) anatomical structures. Rapidly evolving CBCT imaging
modality can be effectively employed in forensic sciences to overcome the limitations of
2D imaging. The current study aimed to develop a novel method of dental age estimation
using 3D surface area analyses of root apices of the developing permanent maxillary
canines and mandibular third molars among Malaysian population using CBCT data. Two
new and validated dental age estimation regression equations were developed. The first
regression equation was developed for Malaysian children aged 7 to 14 years by assessing
the relationship between chronological age and surface area of the developing maxillary
canine apex. Variations based on ethnicity (Malay/Chinese), gender and status of root
development (open/closed) were also investigated in terms of fit to the age estimation
model. The training sample of 191 permanent maxillary canines was selected from the
CBCT images belonging to 100 Malays and 91 Chinese. Moreover, an independent
validation sample of 96 permanent maxillary canines was also selected. Multiple linear
regression analysis was used to derive an age estimation model using chronological age
as a dependent variable and surface area of the maxillary canines apices, ethnicity, gender
and status of the root development (open/closed apices) as predictor variables. A strong
correlation (r = 0.978) was observed between chronological age and the predictor
variables. 95.6 % of the variation in age was explained by the surface area of canine apex,
gender and status of the root development (open/closed apices). However, ethnicity did
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not contribute to the fit of age estimation model. Mean absolute error (MAE) value of
0.30 was observed when tested on an independent validation sample. The second
regression equation was developed for Malaysian juveniles and young adults aged 13 to
24 years by assessing the relationship between chronological age and surface area of the
developing mandibular third molars apices. The training sample of 128 intact mandibular
third molars was selected from the CBCT images belonging to 66 Malays and 62 Chinese.
In addition, 55 mandibular third molars were selected as a validation sample. Multiple
linear regression analysis was used to derive an age estimation model using chronological
age as a dependent variable and surface area of the mandibular third molars apices,
ethnicity, gender and status of the root development (open/closed apices) as predictor
variables. A strong inverse correlation (r = 0.95) was observed between chronological age
and all the predictor variables. The results showed that 89.6% of the variation in age can
be explained by the predictor variables. MAE value of 0.822 was observed when the
derived regression equation was tested on the independent validation sample. In
conclusion, 3D surface area analysis of the developing root apices can be used as a
reliable method for age estimation in Malaysians.
Keywords: CBCT; Age estimation; Three-dimensional; Malaysian
Folio
No full textSajjad Sulaiman, Javed A. Kiyyani-Editorial. pp. 4-6; Sajjad Sulaiman-Interview-Our Man in India. pp. 9-19; Memories-Recollections of a Formanite. pp. 20-22; Plair, Jaffery K.-Memories-Those were the Year. pp. 23-24;Ashraf M. Khan-Article-Motivation for Change. pp. 25-28; Javed A. Kiyani-Article-Cultural Identity of Pakistan. pp. 29-33; Tariq Habib-The Delicious Art of Insult. pp. 30-36; Sulaiman Batalvi-Article-Writing about Films. pp. 37-43; Hussein Masood-Story-A Pledge is Honoured. pp. 44-45; Sajjad Sulaiman-Article-The Growing Menace of Political Terrorism. pp. 46-51; Muhammad Farooq-Strange but True. pp. 52-53; Shafiq Ahmad-Article-Helping Hands. pp. 54-57; Muhammad Zaheer Dogar-Poetry-Reveries, Ecstasy. pp. 58-59; Peter, Simon-Poetry-A Formanite in the Positive Sense. pp. 60-61; Asim Nabi-Essay-Justice in Society. pp. 62-63; Sajjad Sulaiman-Article-Development and Underdevelopment. pp. 64-67; Asif Nawaz-Essay-The Ends of the Earth. pp. 68-69; Essay-The Man Changing His View. pp. 70-72; Haroon-ur-Rasheed-Poetry-O �Mother, see me off. pp. 73-74; Rao Mohammad Zaheer Khan-Poetry-The Swan Song. pp. 75; Mohsin Sohail-A Character Certificate. pp. 76; Adnan-Cartoon. pp. 78-80; Folio 1981 [Urdu-Punjabi]. 176 p.Editorial Board. page 7; Students Union 1980-81. page 8; F.C. College Sports Association 1981-82. page 77; Cartoons. pp. 78-80; Students Union 1981-82. before page 9 (Urdu); Editorial Board. after Urdu Editoria
sj-docx-1-jpc-10.1177_21501319231224711 – Supplemental material for Knowledge and Behavior of Primary Care Physicians Regarding Utilization of Standardized Tools in Screening and Assessment of Anxiety, Depression, and Mood Disorders at a Large Integrated Health System
No full textSupplemental material, sj-docx-1-jpc-10.1177_21501319231224711 for Knowledge and Behavior of Primary Care Physicians Regarding Utilization of Standardized Tools in Screening and Assessment of Anxiety, Depression, and Mood Disorders at a Large Integrated Health System by Abdul Waheed, Asif Khan Afridi, Masooma Rana, Mobeena Arif, Trajan Barrera, Feroza Patel, Muhammad Nausherwan Khan and Erum Azhar in Journal of Primary Care & Community Health</p
Dopamine detection using mercaptopropionic acid and cysteamine for electrodes surface modification
No full textThis article has been retracted. Retraction note: https://doi.org/10.2478/joeb-2018-0008
The reason for the retraction is misunderstanding and communication failure between the authors.Gold electrodes are often not suitable for dopamine measurements as dopamine creates a non-conducting polymer layer on the surface of the electrodes, which leads to increased amount of electrode passivity with the gradual increase in voltammograms measurement. This work presents the impedance spectroscopy and cyclic-voltammetry comparative study for dopamine detection with two modifications for the surface of Au electrodes; cysteamine and mercaptopropionic acid for thermally bonded and ultrasonically welded microfluidic chips, respectively. The effects of optimized tubing selection, bonding techniques, and cleaning methods of the devices with KOH solution played crucial role for improvements in dopamine detection, which are observed in the results. Furthermore, comparison for the modification with unmodified chips, and finding the unknown concentration of dopamine solution using flow injection techniques, is also illustrated.Publisher versio
Queue Discharge at Freeway On-Ramps Using Coordinated Operation of a Ramp Meter and an Upstream Traffic Signal
Full text linkRamp metering is an effective way of maintaining optimum traffic conditions and mitigating congestion on freeways. Several strategies for ramp metering exist in the literature. They are typically based on the freeway traffic parameters as control inputs to the ramp control logic. The ramp signal can be controlled in two ways, i.e., locally controlled (isolated ramp control) and coordinated ramp control. Coordinated ramp control refers to the ramp metering strategies in which several ramp meters connected to the freeway segment are dynamically controlled by considering traffic flows along all ramps. Coordinated ramp metering can play a vital role in freeway congestion mitigation on the ramps as well as normalize the traffic flow over the freeway. In this study, an alternate coordinated metering scheme that uses the state of the upstream traffic signal on arterial as the control input to the ramp meter is proposed. The proposed method aims to prevent long queues on the ramp with limited storage by taking feedback from the upstream traffic signal on the arterial, especially when the ramp has a small storage area for vehicles. Simulation results show a significant reduction in the queue length over the ramp using the proposed scheme. Additionally, the proposed scheme also benefits the arterial traffic. 2020 The Authors. Published by Elsevier B.V.All rights reserved.Scopu
Design and simulation of microfluidic device for metabolite screening and quantitative monitoring of drug uptake in cancer cells
No full textAlthough liquid-liquid extraction methods are currently being applied in many areas such as analytical chemistry, biochemical engineering, biochemistry, and biological applications, accessibility and usability of microfluidics in practical daily life fields are still bounded. Suspended microfluidic devices have the potential to lessen the obstacles, but the absence of robust design rules have hampered their usage. The primary objective of this work is to design and fabricate a microfluidic device to quantitatively monitor the drug uptake of cancer cells. Liquid-liquid extraction is used to quantify the drug uptake. In this research work, designs and simulations of two different microfluidic devices for carrying out multiplex solution experiments are proposed to test their efficiency. These simplified miniaturized chips would serve as suspended microfluidic metabolites extraction platform as it allows extracting the metabolites produced from the cancer cells as a result of applying a specific drug type for a certain period of time. These devices would be fabricated by making polydimethylsiloxane (PDMS) molds from the negative master mold using soft lithography. Furthermore, it can leverage to provide versatile functionalities like high throughput screening, cancer cell invasions, protein purification, and small molecules extractions. As per previous studies, PDMS has been depicting better stability with various solvents and has proved to be a reliable and cost effective material to be used for fabrication, though the sensitivity of the chip would be analyzed by cross contamination and of solvents within the channels of device.Publisher versio
Hydraulic simulations to evaluate and predict design and operation of the Chashma Right Bank Canal
Full text linkIrrigation systems / Irrigation canals / Flow control / Velocity / Canal regulation techniques / Hydraulics / Simulation models / Design / Operations / Crop-based irrigation / Distributary canals / Water delivery / Policy / Protective irrigation / Water allocation / Water requirements / Sedimentation / Water distribution / Equity / Water conveyance / Pakistan / Chashma Right Bank Canal
Dental age estimation in Malaysian adults based on volumetric analysis of pulp/tooth ratio using CBCT data / Muhammad Khan Asif
Full text linkSecondary dentine formation is one of the vital physiological age-related change
that occurs in the permanent dentition throughout life. This physiological agerelated factor can be used for dental age estimation and identification of unknown
deceased persons.
Aims
To investigate the strength of association between chronological age and pulp/tooth
volume ratio among the Malaysian population and to find which amongst these 3
types (Maxillary right canines, maxillary left canines, maxillary right central
incisors) of investigated monoradicular teeth had the highest strength of correlation.
Materials and Methods
Three hundred CBCT scanned data of 153 males and 147 females’ belonging to
either Chinese or Malay ethnicity, stored in the Oral and Maxillofacial Imaging
Division, Faculty of Dentistry University of Malaya were selected according to the
quality, image acquiring parameters and age of the patients at the time of
registration. The subjects were divided into 5 age groups (10 years interval each
group), ranging from 16 to 65 years to ensure balanced sample distribution across
the 5 groups. Subsequently 100 maxillary left canines, 100 maxillary right canines
and 100 maxillary right central incisors having no pathology and fully developed
roots were selected from the database of 300 CBCT scans. Hence, one tooth per
CBCT scan was selected. Maxillary right and maxillary left canines were selected
for the study in order to investigate if any significant difference in the strength of
correlation occurred between two similar types of teeth belonging to different
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subjects. CBCT data was acquired using the i-CAT Cone Beam 3D Dental Imaging
System (Imaging Sciences International, Hatfield, USA). The scans selected had
exposure parameters of 120 KV, 18 mA and the scans were acquired using voxel
size of 0.30 mm and scanning time of 20 sec. Volumetric analysis was performed
with MIMICS software (Materialise NV, Belgium, version 16.0). Data was analysed
using SPSS version 20.
Results
The Pearson correlation and regression analysis showed a significant inverse
association between pulp/tooth volume ratio and chronological age for all the 3 types
of investigated teeth (p<0.01). Results showed the highest coefficient of
determination (R2) values for maxillary central incisor (R2=0.696) followed by
maxillary right canine (R2=0.545) and maxillary left canine (R2=0.527). The
strength of correlation for both male and female was found to be very good. Fisher
Z test results showed no significant difference in the correlation coefficient values
between genders for all the 3 types of investigated teeth and for the whole sample
(Z critical 1.96 for p < .05). Fisher Z test indicated no significant difference in the
correlation coefficient values between maxillary right and maxillary left canines
(P=0.88), despite these teeth being selected from different individuals.
Conclusion
The present study reinforced that pulp/tooth volume ratio with age is a valuable
indicator for dental age estimation for Malaysian population. Maxillary right central
incisor has shown the highest coefficient of determination value among all 3 types
of investigated teeth. Furthermore, the results have showed that this method of
dental age estimation is indeed gender independent
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