http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Hassam Ali,Sheena Shamoon,Nicole Leigh Bolick,Swethaa Manickam,Usama Sattar,Shiva Poola,Prashant Mudireddy 한국간담췌외과학회 2023 Annals of hepato-biliary-pancreatic surgery Vol.27 No.1
Backgrounds/Aims: Endoscopic retrograde cholangiopancreatography-guided gallbladder drainage (ERGD) is an alternative to percutaneous cholecystostomy (PTC) for hospitalized acute cholecystitis (AC) patients. Methods: We retrospectively analyzed propensity score matched (PSM) AC hospitalizations using the National Inpatient Sample database between 2016 and 2019 to compare the outcomes of ERGD and PTC. Results: After PSM, there were 3,360 AC hospitalizations, with 48.8% undergoing PTC and 51.2% undergoing ERGD. There was no difference in median length of stay between the PTC and ERGD cohorts (p = 0.110). There was a higher median hospitalization cost in the ERGD cohort, $62,562 (interquartile range [IQR] $40,707–97,978) compared to PTC, $40,413 (IQR $25,244–65,608; p < 0.001). The 30-day inpatient mortality was significantly lower in hospitalizations with ERGD compared to PTC (adjusted hazard ratio 0.16, 95% confidence interval [CI]: 0.1–0.41; p < 0.001). There was no difference in association with blood transfusions, acute renal failure, ileus, small bowel obstruction, and open cholecystectomy conversion (p > 0.05) between hospitalizations with ERGD and PTC. There was lower association of acute hypoxic respiratory failure (adjusted ratio [AOR] 0.46, 95% CI: 0.29–0.72; p = 0.001), hypovolemia (AOR 0.66, 95% CI: 0.49–0.82; p = 0.009) and higher association of lower gastrointestinal bleed (AOR 1.94, 95% CI: 1.48–2.54; p < 0.001) with ERGD compared to PTC. Conclusions: ERGD is a safer alternative to PTC in patients with AC. The risk complications are lower in ERGD compared to PTC but no difference exists based on mortality or conversion to open cholecystectomy.
A Scalable Simulation Testbed for O-RAN
Hassam Tahir(하삼 타히르),Dian Hanifudin Subhi(디안 하니푸딘 수비),Eun-Sung Jung(정은성) 대한전자공학회 2023 대한전자공학회 학술대회 Vol.2023 No.6
In this ongoing research, a novel, low-resource testbed integrating SD-RAN with NS-3 is presented to address computational challenges in Open Radio Access Networks (O-RAN). Demonstrating impressive efficiency, the testbed manages 100 User Equipments (UEs) using marginally more memory (17.11 MiB) than a conventional single-UE setup (12.92 MiB). The study highlights the potential of intelligent traffic steering in enhancing O-RAN performance.
Hassam Ali,Brandon Tedder,Syed Hamza Waqar,Rana Mohamed,Edward Lawson Cate,Eslam Ali Korean Association of Hepato-Biliary-Pancreatic Su 2022 Annals of hepato-biliary-pancreatic surgery Vol.26 No.3
Backgrounds/Aims: Historically, the incidence and prognosis of patients diagnosed with intrahepatic cholangiocarcinoma (ICC) have been inadequately understood. Survival analysis in ICC has yet to be investigated in a population-based study. Methods: We conducted a retrospective cohort study using the Surveillance, Epidemiology, and End Results Program (SEER) 18 Registry. Risk ratios were estimated via Poisson regression. Hazard ratios for 5-year survival were estimated using hierarchical Cox regression models. Results: Males show a higher rate of age-adjusted ICC incidence. Blacks carried a decreased risk of ICC diagnosis than Whites, while Asians revealed a higher risk of ICC diagnosis when compared with Whites. The observed survival rates at 12, 36, and 60 months were 36.3%, 12.8%, and 8.1%, respectively. Compared with Whites, Blacks showed an increased risk of death (p < 0.01). Lymph node resection during surgery was associated with a 64.1% reduced risk of mortality (p < 0.01). A higher T stage at diagnosis was associated with poor survival (p < 0.01). Surgery combined with chemoradiotherapy, radiotherapy, or chemotherapy was associated with a reduced risk of mortality compared with nonsurgical interventions (p < 0.01). Conclusions: ICC incidence has been increasing since 2000, especially in White males. The risk of ICC rises with age. Lymph node removal is associated with better survival. In recent years, survival had worsened, and surgical intervention improved survival compared with nonsurgical management.
Crohn's Disease with Fistula: 10 Year Trends and Mortality in the United States
( Hassam Ali ),( Rizwan Ishtiaq ),( Muhammad Waqar Hanif ),( Rahul Pamarthy ),( Muhammad Hassan Farooq ),( Muhammad Fahd Farooq ) 대한소화기학회 2022 대한소화기학회지 Vol.80 No.3
Background/Aims: Crohn’s disease (CD) results in significant morbidity, mortality, and healthcare burden. This study evaluated the temporal trends of CD hospitalizations with a fistula over the last decade to understand the outcomes of severe CD. Methods: National Inpatient Sample database from 2009 to 2019 was used to identify CD hospitalizations with a fistula. The outcomes of interest included temporal trend analysis of length of stay (LOS), mean inpatient cost (MIC), and mortality. Results: There was an increase in the total number of fistulizing CD hospitalizations from 5,386 in 2009 to 12,900 in 2019 (p<0.01). The mean age decreased from 44.9±0.6 to 41.8±0.4 years for the study period (p<0.01). Caucasians were the predominant ethnicity, followed by Africans, Hispanics, and others (p<0.001). The mean LOS for fistulizing CD hospitalizations decreased significantly from 11.57±0.09 days in 2009 to 7.20±0.05 days in 2019 (p<0.001). There was a significant decrease in inpatient mortality from 1.72% in 2009 to 0.73% in 2019 (p<0.01). The MIC did not have a significant trend. There was a decreasing trend toward partial/total colectomies, rectosigmoid, and small bowel surgeries from 2009 to 2019 (p<0.001). Conclusions: There has been a rise in CD hospitalizations with fistulizing disease in the last decade. Despite this, the mortality and inpatient LOS have been decreasing significantly. In addition, the increase in CD hospitalizations with fistulizing disease has had no significant effect on hospital costs. (Korean J Gastroenterol 2022;80:142-148)
A New Approach for Controlling a Trajectory Tracking Using Intelligent Methods
Guessoum Abdelhakim,Hassam Abdelouahab 대한전기학회 2019 Journal of Electrical Engineering & Technology Vol.14 No.3
This study aimed to propose and compare two control methods to guide a mobile robot during trajectory tracking. The conventional proportional–integral–derivative (PID) control is widely used in several non-linear systems control area for its simplicity and robustness. But it is diffi cult to adjust the parameters of the PID controller to satisfy the requirements of the control systems. In this article, we present the neuro-PI + D control and fuzzy-neuro-PI + D control. We use those techniques of artifi cial intelligence to guarantee autonomy and intelligence for the path following behavior. The robot under consideration is a four-wheeled system and is represented by a kinematic model. Matlab/Simulink simulation results demonstrate that the fuzzy-neuro-PI + D method has a great potential for navigation issue.
Robust-flatness Controller Design for a Differentially Driven Wheeled Mobile Robot
Mabrouk Boubezoula,Abdelouhab Hassam,Oussama Boutalbi 제어·로봇·시스템학회 2018 International Journal of Control, Automation, and Vol.16 No.4
This paper addresses the problem of robust motion control of a Differentially Driven Wheeled Mobile Robot (DWMR). Using the fact that DWMRs are differentially flat systems, the motion control design is relatively simplified by defining the desired motions of the robot in the flat output space of the system. The accurate and the robust trajectories tracking are provided firstly, by imposing the sliding manifold from the flat output space of the system. Secondly, an adaptive gain discontinuous control law -adaptive sliding mode controller- is introduced to drive to zero in finite time such sliding manifold, despite model uncertainties and external disturbances. The system stability is proven using the Lyapunov theory. Compared with classical Feedback control algorithms and using the laboratory test prototype, Pioneer 3DX, simulation and practical tests are presented to illustrate the performances of the proposed approach in the presence of unknown external disturbances.
Flaviano Edoardo,Bettinelli Silvia,Assandri Maddalena,Muhammad Hassam,Benigni Alberto,Cappelleri Gianluca,Mariano Edward Rivera,Lorini Luca Ferdinando,Bugada Dario 대한마취통증의학회 2023 Korean Journal of Anesthesiology Vol.76 No.4
Background: Ultrasound-guided supra-inguinal fascia iliaca block (FIB) provides effective analgesia after total hip arthroplasty (THA) but is complicated by high rates of motor block. The erector spinae plane block (ESPB) is a promising motor-sparing technique. In this study, we tested the analgesic superiority of the FIB over ESPB and associated motor impairment.Methods: In this randomized, observer-blinded clinical trial, patients scheduled for THA under spinal anesthesia were randomly assigned to preoperatively receive either the ultrasound-guided FIB or ESPB. The primary outcome was morphine consumption 24 h after surgery. The secondary outcomes were pain scores, assessment of sensory and motor block, incidence of postoperative nausea and vomiting and other complications, and development of chronic post-surgical pain.Results: A total of 60 patients completed the study. No statistically significant differences in morphine consumption at 24 h (P = 0.676) or pain scores were seen at any time point. The FIB produced more reliable sensory block in the femoral nerve (P = 0.001) and lateral femoral cutaneous nerve (P = 0.018) distributions. However, quadriceps motor strength was better preserved in the ESPB group than in the FIB group (P = 0.002). No differences in hip adduction motor strength (P = 0.253), side effects, or incidence of chronic pain were seen between the groups.Conclusions: ESPBs may be a promising alternative to FIBs for postoperative analgesia after THA. The ESPB and FIB offer similar opioid-sparing benefits in the first 24 h after surgery; however, ESPBs result in less quadriceps motor impairment.
Lejun Zhang,Yanfei Zou,Muhammad Hassam. Yousuf,Weizheng Wang,Zilong Jin,Yansen Su,Kim Seokhoon 한국인터넷정보학회 2022 KSII Transactions on Internet and Information Syst Vol.16 No.5
Due to the increasing need for data sharing in the age of big data, how to achieve data access control and implement user permission revocation in the blockchain environment becomes an urgent problem. To solve the above problems, we propose a novel blockchain-based data sharing scheme (BDSS) with fine-grained access control and permission revocation in this paper, which regards the medical environment as the application scenario. In this scheme, we separate the public part and private part of the electronic medical record (EMR). Then, we use symmetric searchable encryption (SSE) technology to encrypt these two parts separately, and use attribute-based encryption (ABE) technology to encrypt symmetric keys which used in SSE technology separately. This guarantees better fine-grained access control and makes patients to share data at ease. In addition, we design a mechanism for EMR permission grant and revocation so that hospital can verify attribute set to determine whether to grant and revoke access permission through blockchain, so it is no longer necessary for ciphertext re-encryption and key update. Finally, security analysis, security proof and performance evaluation demonstrate that the proposed scheme is safe and effective in practical applications.