Sartaj Hayat

COMSATS University Islamabad | CUI · Health Cere Center

Background Antisynthetase syndrome (ASS) is an idiopathic inflammatory myopathy characterised by the presence of anti-Jo-1 antibodies. Patients usually present with myositis, interstitial lung diseases, and arthritis. Corticosteroid therapy is the first line treatment. With regard to immunosuppressive use, no consensus has been reached. Rituximab h...

In this paper, we first presented an analytically discussion about energy efficiency of Medium Access Control (MAC) protocols for Wireless Body Area Sensor Networks (WBASNs). For this purpose, different energy efficient MAC protocols with their respective energy optimization techniques; Low Power Listening (LPL), Scheduled Contention and Time Divis...

Classification o f congenital disorders, their frequency o f occurrence in populations, and some terminology questions discussed in the review. Genetically caused congenital anomalies o f reproductive system are outlined. Full information about genetic syndromes is staled in the book: Kozlova S.I., Demikova N.S. Hereditary syndromes and genetic cou...

Growth performance of three age groups viz 60-, 90- and 120-day of two important culture-able indigenous fish species Thaila (Catla catla) and Rohu (Labeo rohita) was studied in glass aquaria under mix exposure of sub-lethal waterborne and dietary metals viz., Cu, Cd and Zn, keeping their control i.e. fish without metal exposure. This experimental...

This paper presents a survey of energy efficiency of Medium Access Control (MAC) protocols for Wireless Body Area Sensor Networks (WBASNs). We highlight the features of MAC protocols along with their advantages and limitations in context of WBASNs. Comparison of Low Power Listening (LPL), Scheduled Contention and Time Division Multiple Access (TDMA...

This paper presents a survey of energy efficiency of Medium Access Control (MAC) protocols for Wireless Body Area Sensor Networks (WBASNs). We highlight the features of MAC protocols along with their advantages and limitations in context of WBASNs. Comparison of Low Power Listening (LPL), Scheduled Contention and Time Division Multiple Access (TDMA...

An experiment under CRD was arranged to study the growth performance of Cirrhina mrigala as affected by a combined exposure of water-borne and dietary nickel at constant water temperature, pH and total hardness of 30ºC, 7.0 and 200 mg L -1 , respectively. Three age groups viz. 45-, 65-and 90-day were used to determine their response in terms of wet...

The research work presented in this paper deals with the assistance of train drivers in case of the signaling system ERTMS dysfunction. In this situation the train driver could use an emergency train stop. Or he must decrease the train speed to its limit, which is 30 km/h. Then the question is: What do we could do when the signaling system ERTMS is...

The traffic operation of the multimode urban networks of public transport, when it is about same owner, is carried out on the level of a centralized control and control unit. The daily challenge of operators of traffic is to find the solutions in real-time to restore the traffic in normal mode according the disturbances. Current work of research tr...

Pakistan is an energy-deficient country. This paper accentuates the importance and challenges of new era technologies. The renewable energy sources like wind energy, solar energy, geothermal energy, ocean energy, biomass energy and fuel cell technology can be used to overcome energy shortage in Pakistan. Renewable energy sources and technologies ha...

There is a worldwide awareness for finding alternate energy sources. Fuel cells are seen as potential candidates to fill the upcoming energy shortage gap. In line with this global approach, an initiative has been undertaken for developing Fuel Cells in Pakistan. Accordingly, a prototype Fuel Cell was developed. Different experiments were conducted...

Three major carps viz. Catla catla, Labeo rohita and Cirrhina mrigala at fingerling stage were exposed to none and sub-lethal concentrations of individual metals (Fe, Zn, Pb, Ni, Mn) and their mixture in glass aquaria for 90 days. After stress period three fish species were grouped metal/treatment wise and stocked, separately in earthen ponds and r...

To report the occurrence of acute myocardial infarction (MI) associated with the intake of oral sildenafil (Viagra) in a nitrate-free patient without previous history of coronary artery disease. A 50-year-old manual laborer was admitted to the hospital with acute inferoposterior wall MI occurring approximately 30 min after taking oral sildenafil 50...

The optical fiber digital transmitter has been designed for an audible frequency range and parameters like bandwidth, attenuation, intensity and the performance of different components were measured and analyzed. The system performed up to expectations. This paper also gives a basic overview of optical fiber communication system.

Purpose Pulmonary arterial hypertension (PAH) has been reported with several rheumatologic diseases; however, it is not common in adult-onset Still's disease (ASD). We describe a patient with ASD who developed PAH. Case Report A 29-year-old female with a 9-year history of ASD was admitted in July 2005 with 3 months of progressive exertional dyspne...

Purpose High-dose corticosteroids (CS) are the mainstay of treatment for giant cell arteritis (GCA). A usually required long-term treatment with CS, ranging from 1 to 5 years or more, frequently leads to serious side effects in about 60% of patients. There are few reports of treatment of refractory or steroid dependent GCA with tumor necrosis facto...

Background Several studies have detected that the level of IgM-RF decreases with effective disease modifying antirheumatic drugs (DMARDs), especially methotrexate and parental gold. In contrast, few studies have analyzed the variations in the titer of anticyclic citrullinated peptide (anti-CCP) antibody or rheumatoid factor (RF) during treatment wi...

Serum Amyloid A (SAA) is an acute-phase protein secreted mainly by hepatocytes and is largely associated with high-density lipoprotein (HDL) in plasma. It has been suggested that SAA alters HDL binding to the cell surface and that this in turn changes HDL-mediated cholesterol delivery to cells. Incorporation of SAA into HDL at concentrations equiva...

A definitive experiment is described on the excess noise in a buried-channel MOS transistor. The specimen was biased with a uniform, Ohmic, channel. With the surface enhanced 1/f noise is produced. With the surface depleted or inverted the noise drops by more than two orders of magnitude and takes on the character of the 1/f noise observed in JFETs...

Measurements have been made of the 1/f noise in MOS enhancement and depletion devices in strong inversion, biased in the Ohmic region between 77 and 360 K. Measurements of the DC characteristics have enabled the results to be related to a clear model of the device operation. The data do not fit mobility or quantum 1/f noise models. Good agreement i...

Hi-vol air sampling equipment was run at three sites (representative of “city”, “industrial” and “rural” sampling locations) in Lahore, Pakistan, for over a year. The extraction and quantitative analyses of all Lahore air samples was completed for a suite of metals, various anions, ammonium, elemental and organic carbon, as well as particle-associa...

At the M.D. Anderson Cancer Center (Houston), Listeria monocytogenes was cultured from 14 patients between 1980 and 1987. The case records of 11 of these patients were reviewed. Underlying malignancies included acute leukemia (three), lymphoma (two), myeloma (one), adenocarcinoma of colon (two), carcinoma of breast (one), carcinoma of lung (one), a...

The in-vitro susceptibility of Mycobacterium avtum complex isolates, obtained from immunosuppressed patients with the without the Acquired Immunodeficiency Syndrome (AIDS), to various antimicrobial agents was determined. Amikacin, the 4-quinolone compounds—ciprofloxacin, temafloxacin and PD 11758—and the penem SCH 34343 were active against most of...

Primary cutaneous infection with Aspergillus species and Rhizopus species was observed in five patients between October 1986 and January 1988. All patients had an underlying hematological malignancy and were neutropenic. Four patients developed skin lesions with eschars at and around the site of intravenous catheter insertion. One patient had two l...

A study is presented of the symptoms of the devices in a slice of PNP power transistors with a poor yield. The failure modes over the slice are analysed. In specific areas the electrical characteristics and optical appearance of the devices were studied and failure statistics are presented. The low yield is ascribed to cracks in the phosphosilicate...

The compositions of plasma and urine were studied in toads (Bufo viridis) which were collected from three locations in Israel, and compared with toads which were kept under constant laboratory conditions for nearly 2 years. Plasma osmolality was rather constant (over 310 mOsm kg-1 H2O) during the whole year in the active toads. Urea was the most va...

One group of three fish species, Catla catla, Labeo rohita and Cirrhina mrigala, was exposed to sub-lethal concentrations of lead (Pb), separately, in aquaria for 30 days while other was kept un-stressed as a control. After exposure period both stressed and control fish were shifted to earthen ponds to rear, separately, for six months to study thei...