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- 저자 : Muhammad Hasnain ALI (검색결과 5 건)
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A machine learning framework for performance anomaly detection
Muhammad Hasnain,Muhammad Fermi Pasha,Imran Ghani,정승렬,Aitizaz Ali 한국인터넷정보학회 2022 인터넷정보학회논문지 Vol.23 No.2
Web services show a rapid evolution and integration to meet the increased users' requirements. Thus, web services undergo updates and may have performance degradation due to undetected faults in the updated versions. Due to these faults, many performances and regression anomalies in web services may occur in real-world scenarios. This paper proposed applying the deep learning model and innovative explainable framework to detect performance and regression anomalies in web services. This study indicated that upper bound and lower bound values in performance metrics provide us with the simple means to detect the performance and regression anomalies in updated versions of web services. The explainable deep learning method enabled us to decide the precise use of deep learning to detect performance and anomalies in web services. The evaluation results of the proposed approach showed us the detection of unusual behavior of web service. The proposed approach is efficient and straightforward in detecting regression anomalies in web services compared with the existing approaches.
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Ali, Muhammad Hasnain,Kang, Dong-Ho,Park, Jin-Hong Elsevier 2018 ORGANIC ELECTRONICS Vol.53 No.-
<P><B>Abstract</B></P> <P>Rhenium diselenide (ReSe<SUB>2</SUB>) has a small bandgap (<1 eV), which facilitates its longer wavelength photodetection capability. However, ReSe<SUB>2</SUB>-based photodetectors have presented relatively low photoresponsivity compared to devices fabricated on conventional transition metal dichalcogenides (TMDs), such as MoS<SUB>2</SUB> and WSe<SUB>2</SUB>. Here, we demonstrate a high-performance ReSe<SUB>2</SUB> near-infrared photodetector with high photoresponsivity (4.2 × 10<SUP>4</SUP> A/W), a wide detection range (520–1064 nm), and fast photoswitching time (τ<SUB>rise</SUB>: 1.9 ms and τ<SUB>decay</SUB>: 4.5 ms). This was accomplished by an organic molecule-based n-doping technique based on a (3-aminopropyl)trimethoxysilane (APTMS). The n-doping concentration of ReSe<SUB>2</SUB> was controlled between 7.82 × 10<SUP>10</SUP> and 3.90 × 10<SUP>11</SUP> cm<SUP>−2</SUP>, which lies in the nondegenerate regime. After the APTMS treatment, photoresponsivity values were increased from 4.3 × 10<SUP>3</SUP> to 4.2 × 10<SUP>4</SUP> A/W (tenfold at λ = 785 nm) and from 3.6 to 28.5 A/W (eightfold at λ = 1064 nm). The photoswitching times obtained after the n-type doping (τ<SUB>rise</SUB>/τ<SUB>decay</SUB>: 1.9/4.5 ms) were also shorter than previously reported values in the devices formed on rhenium-based TMDs. We expect that this doping technique would be useful for the integration and performance optimization of various TMD-based devices in the future.</P> <P><B>Highlights</B></P> <P> <UL> <LI> We demonstrate a ReSe<SUB>2</SUB>-based infrared photodetector enhanced by APTMS n-doping. </LI> <LI> Very high photoresponsivity (4.2 × 10<SUP>4</SUP> A/W) was achieved under 785 nm laser exposure. </LI> <LI> Detection range of APTMS-doped ReSe<SUB>2</SUB> photodetector was 520–1064 nm. </LI> <LI> Photoswitching times of APTMS-doped ReSe<SUB>2</SUB> photodetector were 1.9/4.5 ms (τ<SUB>rise</SUB>/τ<SUB>decay</SUB>). </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>
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Outcomes of Large Volume Paracentesis in Cirrhotic Patients with Spontaneous Bacterial Peritonitis
( Hafiz Abdul Basit Siddiqui ),( Muhammad Tahir Khan ),( Hasnain Ali Shah ),( Rabeea Azmat ),( Saad Bin Zafar ) 대한간학회 2017 춘·추계 학술대회 (KASL) Vol.2017 No.1
Aims & Background: Bacterial infections are one of the most frequent complication in cirrhosis, particularly in patients with decompensated cirrhosis and accounts for significant mortality. Ascites is one of the most common complications of hepatic cirrhosis (1). In a country like Pakistan where the prevalence of Hepatitis C is on the rise, end stage liver disease is becoming a common scenario (2-4). Spontaneous bacterial peritonitis (SBP) occurs in 10-30% of such patients and is associated with high mortality rate among hospitalized patients (1, 5-7). The diagnosis of SBP through paracentesis is crucial in the management of SBP. SBP should be diagnosed early as for successful treatment of patients. Diagnostic paracentesis facilitates rapid initiation of antimicrobial therapy and permits optimal coverage in case a causative organism identified. However, more recently, the role of paracentesis in management of SBP is also explored through large volume removal of ascitic fluid. Despite the proposed risk of renal failure, Large Volume Paracentesis (LVP) among SBP patients has shown promising results indicated by lesser morbidity and mortality (8). Rationale of the study: Spontaneous bacterial peritonitis is a serious infectious condition with grave outcome in cirrhotic patients. Large volume paracentesis decreases the burden of infective fluid causing further deterioration of condition. Outcomes of LVP in SBP patients are not clearly addressed in previous studies. Furthermore, to date, no study from the country has reported the effect of large volume paracentesis on the management of SBP in hospitalized patients. This study will assess the outcomes of LVP in patients with SBP, both in terms of length of stay, in hospital 6 week mortality. Objectives: To compare the treatment outcomes among patients with and without large volume paracentesis diagnosed with Spontaneous Bacterial Peritonitis Methods: Study design: Analytical Cross-sectional Study Setting: Gastroenterology Unit, The Aga Khan University Hospital, Karachi Study Duration: 2 Years Study population: Patients admitted with Spontaneous Bacterial Peritonitis to Gastroenterology Unit, the Aga Khan University Hospital Sample Size: Using OpenEpi.com online sample size calculator and using the differences in hospital stay among patients with and without delayed paracentesis as 36.84% and 21.48% (8) the sample size was calculated to be 200 at 95% confidence level (100 in each group). Sampling Technique: Consecutive Sampling Inclusion Criteria: Patients admitted with ascites found to have spontaneous bacterial peritonitis on diagnostic paracentesis. 1) Patients with complete records 2) Above 18 and below 75 years of age Exclusion criteria: 1) Incomplete records 2) Secondary peritonitis Data Collection: The data will be extracted from the records and information analyzed will be patient age, gender, whether the patients receive large volume paracentesis or not, the length of hospital stay, and length of ICU stay. No patient will be enrolled for the study and retrospective data analysis will be carried out. Conclusions: Extracted data till now favours that LVP in patients with SBP translates into significantly positive outcomes in terms of length of hospital stay, spcecial care unit stay, need for terlipressin infusions, in hosptial mortality and 6 weeks mortality post large volume paracentesis. Hence LVP shoiuld be performed in patients suffering from SBP.
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