39 research outputs found
Trial of once dialy gemfibrozil (900 mg) in the treatment of hyperlipidemia in diabetes
No full textThis article does not have an abstract
Trial of once dialy gemfibrozil (900 mg) in the treatment of hyperlipidemia in diabetes
No full textThis article does not have an abstract
Hystertic optimal policy of servers in front room and back room with switching time and switching cost
No full textStored Shadows from a Narrative Point of View
No full textCreativity is the expression of the innermost thoughts of man. Works appear according to the author's feelings. It is better to take what was written in each period with a chronology. The philosophy of life is that the advice of others inspires man to inspire himself so that the book of poems is useful to human society as the author explains. Man is divided in society due to various reasons. Thus it shows that nothing can happen due to division and we should live in unity. It emphasizes that a political officer should be a servant of the people. The female nature and the Nilothava flower illustrate that the human mind is like a sparrow's nest. This approach is designed to be relevant to the current society
Performance Analysis of a Retrial Queueing System with Optional Service, Unreliable Server, Balking and Feedback
No full textThis paper considers a Markovian retrial queueing system with an optional service, unreliable server, balking and feedback. An arriving customer can avail of immediate service if the server is free. If the potential customer encounters a busy server, it may either join the orbit or balk the system. The customers may retry their request for service from the orbit after a random amount of time. Each customer gets the First Essential Service (FES). After the completion of FES, the customers may seek the Second Optional Service (SOS) or leave the system. In the event of unforeseen circumstances, the server may encounter a breakdown, at which point an immediate repair process will be initiated. After the service completion, the customer may leave the system or re-join the orbit if not satisfied and demand regular service as feedback. In this investigation, the stationary queue size distributions are framed using a recursive approach. Various system performance measures are derived. The effects induced by the system parameters on the performance metrics are numerically and graphically analysed
Reliability and Validity of a Modified PHQ-9 Item Inventory (PHQ-12) as a Screening Instrument for Assessing Depression in Asian Indians (CURES - 65)
No full textAbstract
Objectives: To evaluate the validity and reliability of the modified Patient Health Questionnaire(PHQ) 12 item
instrument as a screening tool for assessing depression compared to the PHQ -9 in a representative south
Indian urban population.
Methods: The Chennai Urban Rural Epidemiology Study [CURES] is a large cross-sectional study conducted
in Chennai, South India. In Phase 1 of CURES(urban component), 26,001 individuals aged ≥ 20 years
individuals were selected by a systematic sampling technique of whom one hundred subjects were randomly
selected, using computer-generated numbers, for this validation study. Two self-reported questionnaires
(modified PHQ-12 item and PHQ 9 item) were administered to the subjects to compare their effectiveness in
detecting depression. Reliability and validity were assessed and Receiver Operating Characteristic (ROC)
curves were plotted. Pearson’s correlation was used to compare the two questionnaires.
Results: The mean age of the study was 38.6±11.6 years and 48% were males. Pearson’s correlation coefficient
between the modified PHQ-12 and the PHQ-9 item was 0.913 [p<0.0001]. Factor Analysis revealed that the
modified PHQ 12 item scale can be used as a unidimensional scale and had excellent internal
consistency(Cronbach’s alpha:0.88). A cut point of >4 calculated using the ROC curves for the modified PHQ-
12 item had the highest sensitivity (92.0%) and specificity (90.7%) using PHQ-9 as the gold standard. The
positive predictive value was 76.7%, and the negative predictive value, 97.1% and the area under the ROC
curve, 0.979 (95% Confidence Interval: 0.929 - 0.997, p<0.0001).
Conclusion: The modified PHQ-12 item is a valid and reliable instrument for large scale population based
screening of depression in Asian Indians and a cut point score of 4 or greater gave the highest sensitivity and
specificity.
Performance analysis of a queueing system with tandem nodes, retrial and server vacations
No full textIn this proposed work, we consider a Markovian model of two-stage tandem queueing system with retrial policy and server vacation. The arriving customers are directed to the first station for service if server is idle upon arrival. Otherwise, they will enter into the orbit for retrial. These customers will generate a continuous stream of request for service in a random period of time. After completing the first station service, the customers will enter into the second station. Once the customers receive their service in both stations, they will depart from the system forever. It is mandatory for all the arriving customers to come across both the service stations. When no more customers are present in the orbit, the servers will leave for vacation. The balance equations of birth–death transitions are solved using the recursive approach. Various system performance measures are obtained and the effect of parameters were illustrated graphically
Single machine with batch due dates, holding, tardiness, earliness and preventive maintenance
No full text
