scholarly journals Simulation of m-Sequence’s Properties Through MATLAB-SIMULINK

2002 ◽  
Vol 7 (1) ◽  
pp. 147 ◽  
Author(s):  
A. Ahmad ◽  
M. J. Al-Mushrafi ◽  
S. Al-Busaidi
Keyword(s):  
Analytical Study ◽  
Cost Effective ◽  
Matlab Simulink ◽  
Test Kit ◽  
M Sequence ◽  
Software Program ◽  
Run Lengths ◽  
M Sequences

Based on an analytical study of the theory of m-sequences, a tool is developed to facilitate practicing engineers to either generate m-sequence for its application, or to test applied m-sequence, or both. The developed test–kit simulates all the properties of m-sequences including number of 1s and 0s, the run lengths, pulse periods as well as autocorrelation properties.  This simplified tool is developed using MATLAB–SIMULINK with required codes as well as desired blocks. The model is cost-effective and the output files of the generated SIMULINK models can be utilized in any software program or simulation procedures.

scholarly journals A Single Input Dual Output Multiport DC–DC Converter with Minimal Switches

2019 ◽  
Vol 8 (2S8) ◽  
pp. 1118-1123
Keyword(s):  
Matlab Simulink ◽  
Software Program ◽  
Single Input ◽  
Double Yield

This paper proposes a topology for multiport DCDC converter with double yield for a solitary facts. Essentially the buck converter's yield is lesser than the records. Boost converter's yield is more distinguished than the info. buck-boost converter's yield is each more noteworthy or lesser than the facts. Be that as it is able to, the interest of the proposed converter is, it surrenders the both increase and undertaking down yields all the at the same time as. The contemporary-day topology of the multiport DC-DC Converter applied four switches however the proposed topology uses less number of switches with excessive yield contrasted with existing one. It likewise brings approximately decrease of replacing misfortunes. The skillability of the converter is improved, yield voltages get controlled and the charge of the circuit diminishes because of its minimization. The near circle PI controlling approach is embraced. The results were checked with the resource of making use of MATLAB simulink software program program

scholarly journals Evaluation of Etiology of Epistaxis and its Management in Dhulikhel Hospital

2015 ◽  
Vol 13 (1) ◽  
pp. 49-55 ◽  
Author(s):  
I Shrestha ◽  
M Pokharel ◽  
BL Shrestha ◽  
A Dhakal ◽  
RCM Amatya
Keyword(s):  
Surgical Treatment ◽  
Analytical Study ◽  
Cost Effective ◽  
Medical Intervention ◽  
P Value ◽  
Medical Sciences ◽  
Cross Sectional ◽  
Institutional Review ◽  
Specific Objective ◽  
Non Surgical Treatment

Background Epistaxis is one of the most common and most difficult emergencies presenting in 7-14% of the general population each year. Although its lifetime incidence is about 60%, only 6% require formal medical intervention but they can be serious and even life threatening.Objective The main objectives are to study different etiology, types, modality of treatment of epistaxis. Specific objective is also to find out if the modality of treatment is associated with age, site, amount of bleeding and etiology.Method It is a prospective, cross sectional, longitudinal, analytical study done in Department of ENT, Dhulikhel hospital, Kathmandu University School of Medical Sciences (KUSMS) from Aug. 2010 to Aug. 2013. Data was collected. This study was cleared through institutional review committee of hospital. Statistical analysis was done using SPSS 16.0.Result 487 patients were studied during the period. There was significant association between age group with type of treatment (p value 0.002); and with admission (p value < 0.001). Significance in the study was also shown in the correlation between site of bleeding and the type of treatment and also with alcohol intake with site of bleeding (p value < 0.001).However there was no significance between hypertension and the type of treatment methods chosen (p value >0.01).Conclusion Management of epistaxis is challenging. Most are managed by non surgical means whereas some by surgical treatment. Non surgical treatment is still useful, safe and cost effective. Type of treatment and need for hospital stay is related to age and site of bleeding.Kathmandu University Medical Journal Vol.13(1) 2015; 49-55

Water quality monitoring by Thamnotoxkit F™ including cyanobacterial blooms

2000 ◽  
Vol 42 (1-2) ◽  
pp. 381-385 ◽  
Author(s):  
A. Kozma Törökné ◽  
E. László ◽  
I. Chorus ◽  
J. Fastner ◽  
R. Heinze ◽  
...  
Keyword(s):  
High Performance ◽  
Cost Effective ◽  
Water Quality Monitoring ◽  
Cyanobacterial Blooms ◽  
Mouse Bioassay ◽  
Test Mouse ◽  
Cost Effective Method ◽  
Freeze Dried ◽  
Test Kit ◽  
Cyanobacterial Toxicity

The Thamnotoxkit F™ was evaluated for detecting cyanobacterial toxins as they may be hazardous to human health if they reach drinking water networks or if people are exposed through recreational activity. This test kit is a 24-hour bioassay using larvae of the freshwater anostracan crustacean Thamnocephalus platyurus hatched from cysts. Nine freeze-dried Microcystis aeruginosa samples from freshwaters of Hungary, Germany and Brazil were tested with the Thamnotox test, rat hepatocyte test, mouse test and analysed for microcystins by high performance liquid chromatography (HPLC). It can be concluded that the Thamnotox test is an alternative simple, cost-effective method that may replace the mouse bioassay used previously for determination of cyanobacterial toxicity.

PAH RIS® Soil Test—A Rapid, On-Site Screening Test for Polynuclear Aromatic Hydrocarbons in Soil

1994 ◽  
Vol 77 (2) ◽  
pp. 466-472 ◽  
Author(s):  
Patricia P McDonald ◽  
Richard E Almond ◽  
James P Mapes ◽  
Stephen B Friedman
Keyword(s):  
Aromatic Hydrocarbons ◽  
Matrix Effects ◽  
Cost Effective ◽  
Polynuclear Aromatic Hydrocarbons ◽  
Detection Methods ◽  
Enzyme Linked Immunosorbent Assay ◽  
Sample Treatment ◽  
Negative Results ◽  
Cost Effective Method ◽  
Test Kit

Abstract Polynuclear aromatic hydrocarbons (PAHs) are chemicals of concern when they contaminate the environment. Current detection methods (gas chromatography and liquid chromatography) are laborious, time consuming, and expensive. As an alternative, we developed a competitive enzyme-linked immunosorbent assay kit that can be used on site for the detection of PAHs at 1 ppm in soil. The immunoassay kit includes all the components necessary to conduct the analysis in the field. The test consists of 3 major steps: (1) sample treatment; (2) immunoassay, in which the target compound is bound by a specific antibody followed by the development of an indicator color; and (3) interpretation of results. A sample that develops less color than the standard is interpreted as positive (soil sample contaminated with PAHs at ≥1 ppm). Validation studies demonstrated that the assay is sensitive and specific. The assay detects PAH contamination in soil at 1 ppm or greater and specifically detects the 3- and 4-ringed aromatics and most of the 5-and 6-ringed aromatics. PAH-free soil samples gave negative results in the assay at a confidence level of &gt;95%. Matrix effects, interperson, and interlot variations were minimal. The test requires &lt;25 min to complete. The test kit is field compatible and provides a cost effective method for screening soils at risk for PAH contamination.

scholarly journals Simulation-based Analysis of a Dynamic Voltage Restorer under Different Voltage Sags with the Utilization of a PI Controller

2020 ◽  
Vol 10 (4) ◽  
pp. 5889-5895
Author(s):  
A. H. Soomro ◽  
A. S. Larik ◽  
M. A. Mahar ◽  
A. A. Sahito ◽  
I. A. Sohu
Keyword(s):  
Power Quality ◽  
Harmonic Distortion ◽  
Cost Effective ◽  
Pi Controller ◽  
Voltage Control Strategy ◽  
Constant Frequency ◽  
Dynamic Voltage Restorer ◽  
Matlab Simulink ◽  
Voltage Restorer ◽  
Dynamic Voltage

Power quality problems are becoming a major issue. Every utility company consumer desires to receive steady-state voltage, i.e. a sinusoidal waveform of constant frequency as generated at power stations, but the influence of disturbances in the shape of sags and swells, interruptions, transients and harmonic distortions which affect power quality, resulting in loss of data, damaged equipment, and augmented cost. The most powerful voltage disturbance is the sag voltage. In this paper, a Dynamic Voltage Restorer (DVR) is proposed for sag voltage compensation. It is cost-effective and protects critical loads in a good manner from balanced or unbalanced sag voltage. Control strategy (such as a PI controller) is adopted with DVR topology and the performance of such a device with the proposed controller is analyzed through simulation in MATLAB/Simulink. Three types of faults are utilized, which are available in MATLAB/Simulink pack, for obtaining the sag voltage. The specific range of total harmonic distortion percentage is also discussed. After the result validation of the DVR topology in MATLAB/Simulink, it has been seen that the proposed topology is able to compensate the sag voltage of any type of fault and reduce the unbalancing and voltage distortions of the grid.

scholarly journals Evaluating the Onset, Severity, and Recovery of Changes to Smell and Taste Associated With COVID-19 Infection in a Singaporean Population (the COVOSMIA-19 Trial): Protocol for a Prospective Case-Control Study

10.2196/24797 ◽  
2020 ◽  
Vol 9 (12) ◽  
pp. e24797
Author(s):  
Florence Sheen ◽  
Vicki Tan ◽  
Sumanto Haldar ◽  
Sharmila Sengupta ◽  
David Allen ◽  
...  
Keyword(s):  
Standardized Test ◽  
Sudden Change ◽  
Objective Measure ◽  
Cost Effective ◽  
Population Based ◽  
Self Report ◽  
Polymerase Chain Reaction Test ◽  
Taste Test ◽  
Test Kit ◽  
Sensory Changes

Background Sudden loss of smell and/or taste has been suggested to be an early marker of COVID-19 infection, with most findings based on self-reporting of sensory changes at a single time point. Objective To understand the onset, severity, and recovery of sensory changes associated with COVID-19 infection, this study will longitudinally track changes in chemosensory acuity among people with suspected COVID-19 infection using standardized test stimuli that are self-administered over 28 days. Methods In a prospective, case-controlled observational study, volunteers will be recruited when they present for COVID-19 screening by respiratory tract polymerase chain reaction test (“swab test”). The volunteers will initially complete a series of questionnaires to record their recent changes in smell and taste ability, followed by a brief standardized smell and taste test. Participants will receive a home-use smell and taste test kit to prospectively complete daily self-assessments of their smell and taste acuity at their place of residence for up to 4 weeks, with all data submitted for collection through web-based software. Results This study has been approved by the Domain Specific Review Board of the National Healthcare Group, Singapore, and is funded by the Biomedical Research Council Singapore COVID-19 Research Fund. Recruitment began on July 23, 2020, and will continue through to March 31, 2021. As of October 2, 2020, 69 participants had been recruited. Conclusions To our knowledge, this study will be the first to collect longitudinal data on changes to smell and taste sensitivity related to clinically diagnosed COVID-19 infection, confirmed by PCR swab test, in a population-based cohort. The findings will provide temporal insights on the onset, severity, and recovery of sensory changes with COVID-19 infection, the consistency of symptoms, and the frequency of full smell recovery among patients with COVID-19. This self-administered and cost-effective approach has many advantages over self-report questionnaire–based methods and provides a more objective measure of smell and taste changes associated with COVID-19 infection; this will encourage otherwise asymptomatic individuals who are potential spreaders of the virus to self-isolate and seek formal medical diagnosis if they experience a sudden change in sensory acuity. This broadened case finding can potentially help control the COVID-19 pandemic and reduce the emergence of clusters of infections. Trial Registration ClinicalTrials.gov NCT04492904; https://clinicaltrials.gov/ct2/show/NCT04492904. International Registered Report Identifier (IRRID) DERR1-10.2196/24797

scholarly journals Evaluating the Onset, Severity, and Recovery of Changes to Smell and Taste Associated With COVID-19 Infection in a Singaporean Population (the COVOSMIA-19 Trial): Protocol for a Prospective Case-Control Study (Preprint)

2020 ◽  
Author(s):  
Florence Sheen ◽  
Vicki Tan ◽  
Sumanto Haldar ◽  
Sharmila Sengupta ◽  
David Allen ◽  
...  
Keyword(s):  
Standardized Test ◽  
Sudden Change ◽  
Objective Measure ◽  
Cost Effective ◽  
Population Based ◽  
Self Report ◽  
Polymerase Chain Reaction Test ◽  
Taste Test ◽  
Test Kit ◽  
Sensory Changes

BACKGROUND Sudden loss of smell and/or taste has been suggested to be an early marker of COVID-19 infection, with most findings based on self-reporting of sensory changes at a single time point. OBJECTIVE To understand the onset, severity, and recovery of sensory changes associated with COVID-19 infection, this study will longitudinally track changes in chemosensory acuity among people with suspected COVID-19 infection using standardized test stimuli that are self-administered over 28 days. METHODS In a prospective, case-controlled observational study, volunteers will be recruited when they present for COVID-19 screening by respiratory tract polymerase chain reaction test (“swab test”). The volunteers will initially complete a series of questionnaires to record their recent changes in smell and taste ability, followed by a brief standardized smell and taste test. Participants will receive a home-use smell and taste test kit to prospectively complete daily self-assessments of their smell and taste acuity at their place of residence for up to 4 weeks, with all data submitted for collection through web-based software. RESULTS This study has been approved by the Domain Specific Review Board of the National Healthcare Group, Singapore, and is funded by the Biomedical Research Council Singapore COVID-19 Research Fund. Recruitment began on July 23, 2020, and will continue through to March 31, 2021. As of October 2, 2020, 69 participants had been recruited. CONCLUSIONS To our knowledge, this study will be the first to collect longitudinal data on changes to smell and taste sensitivity related to clinically diagnosed COVID-19 infection, confirmed by PCR swab test, in a population-based cohort. The findings will provide temporal insights on the onset, severity, and recovery of sensory changes with COVID-19 infection, the consistency of symptoms, and the frequency of full smell recovery among patients with COVID-19. This self-administered and cost-effective approach has many advantages over self-report questionnaire–based methods and provides a more objective measure of smell and taste changes associated with COVID-19 infection; this will encourage otherwise asymptomatic individuals who are potential spreaders of the virus to self-isolate and seek formal medical diagnosis if they experience a sudden change in sensory acuity. This broadened case finding can potentially help control the COVID-19 pandemic and reduce the emergence of clusters of infections. CLINICALTRIAL ClinicalTrials.gov NCT04492904; https://clinicaltrials.gov/ct2/show/NCT04492904. INTERNATIONAL REGISTERED REPORT DERR1-10.2196/24797

Sign in / Sign up

Export Citation Format

Share Document