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Muhammad Ali Tariq,Minhail Khalid Malik,Qazi Shurjeel Uddin,Zahabia Altaf,Mariam Zafar 대한심장혈관흉부외과학회 2023 Journal of Chest Surgery (J Chest Surg) Vol.56 No.6
Background: The heightened morbidity and mortality associated with repeat cardiac surgery are well documented. Redo median sternotomy (MS) and minimally invasive valve surgery are options for patients with prior cardiac surgery who require mitral valve surgery (MVS). We conducted a systematic review and meta-analysis comparing the outcomes of redo MS and minimally invasive MVS (MIMVS) in this population. Methods: We searched PubMed, EMBASE, and Scopus for studies comparing outcomes of redo MS and MIMVS for MVS. To calculate risk ratios (RRs) for binary outcomes and weighted mean differences (MDs) for continuous data, we employed a random-effects model. Results: We included 12 retrospective observational studies, comprising 4157 participants (675 for MIMVS; 3482 for redo MS). Reductions in mortality (RR, 0.54; 95% confidence interval [CI], 0.37–0.80), length of hospital stay (MD, −4.23; 95% CI, −5.77 to −2.68), length of intensive care unit (ICU) stay (MD, −2.02; 95% CI, −3.17 to −0.88), and new-onset acute kidney injury (AKI) risk (odds ratio, 0.34; 95% CI, 0.19 to 0.61) were statistically significant and favored MIMVS (p<0.05). No significant differences were observed in aortic cross-clamp time, cardiopulmonary bypass time, or risk of perioperative stroke, new-onset atrial fibrillation, surgical site infection, or reoperation for bleeding (p>0.05). Conclusion: The current literature, which primarily consists of retrospective comparisons, underscores certain benefits of MIMVS over redo MS. These include decreased mortality, shorter hospital and ICU stays, and reduced AKI risk. Given the lack of high-quality evidence, prospective randomized control trials with adequate power are necessary to investigate long-term outcomes.
Tariq Ali,Saima Mohyuddin,Ghafar Ali,Muhammad Ibrar,Faiza Summer,Sajid Iqbal,Yi Xie,Muhammad Maqbool 대한금속·재료학회 2022 ELECTRONIC MATERIALS LETTERS Vol.18 No.1
Self-organized and vertically oriented TiO2nanotubes (TNTs) were synthesized via anodization of Ti sheet in a glycerolbasedused electrolyte. Graphite (Gt) is doped in TNTs by physical vapor deposition (PVD) under Ar-atmosphere at 700 °Cusing polyvinyl alcohol (PVA) as a precursor. The samples were characterized using FESEM, HRTEM, XRD, Raman,XPS, and UV–vis diffuse reflectance spectroscopy. HRTEM, XRD, and Raman analysis confirm the suppression of phasetransformation from anatase to rutile due to Gt doping. The UV–vis absorption properties and photocatalytic activity of thepristine and Gt-doped TNTs have been investigated. The bandgap absorption edge of Gt-doped TNTs shifts towards a higherwavelength (~ 550 nm) compared to the pristine TNTs (~ 390 nm). Moreover, the Gt-doped TNTs show strong absorptionin the visible region. This makes it a good candidate for energy-storing applications. It has been found that Gt-doped TNTsdisplay two-fold enhanced photocatalytic activity for methyl orange (MO) degradation compared to pristine. The enhancedphoto-degradation of Gt-doped TNTs is ascribed to the higher absorptivity, better crystallinity, and lower bandgap of TNTsdue to Gt doping. The enhanced photo-degradation ability of Gt-doped TNTs can be used to clean industrial wastewater.
Nasir, Muhammad Tauseef,Ali, Muhammad Ansab,Khan, Tariq S.,Al-Hajri, Ebrahim,Kadri, Muhammad Bilal,Kim, Kyung Chun Elsevier Sequoia S.A 2019 Energy and buildings Vol.191 No.-
<P><B>Abstract</B></P> <P>Present work aims to investigate the thermal performance assessment of different combinations of working fluids for an Organic Rankine Cycle powered Vapor Compression Cycle (ORC-VCC) for air-conditioning applications. Analysis of system performance is conducted for a fixed cooling load of a small conditioned space having a sensible heat factor of 0.7, at different ambient conditions. A preliminary evaluation of the system at the baseline conditions was conducted considering the second law efficiency, overall heat capacity of exchangers, overall internal exergy destruction, and overall Coefficient of Performance. Afterwards, parametric study was performed for the best performing candidates from the preliminary analysis using second law efficiency and overall heat capacity of heat exchangers. The system parameters considered for the study include saturated temperatures of heat exchangers, ORC boiler superheat, pinch points and the sub-cooling of both the ORC and VCC condensers. Then, multi objective optimization was performed using Genetic Algorithm followed by multi-criteria decision-making using Technique for Order of Preference by Similarity to Ideal Solution (TOPSIS) to select the best optimal solutions from the Pareto front. Sixteen combinations comprising of four working fluids, R245fa, R600, R600a, and R134a were analyzed. The optimization results showed R245fa ORC-R600a VCC to be the best candidate at ambient conditions of 30 °C, while at 35 °C and 40 °C, R600a ORC-R245fa VCC was found to be the most suitable candidate.</P> <P><B>Highlights</B></P> <P> <UL> <LI> The prospects of different working fluids and their combinations in an ORC driven air conditioning system are investigated. </LI> <LI> Ambient conditions considering the outdoor temperatures of 30 °C, 35 °C and 40 °C with 50% relative humidity is selected. </LI> <LI> Working fluids R245fa, R134a, R600a, and R600, and their combinations are the investigated. </LI> <LI> Sensitivity analysis of different parameters on the second law efficiency and UA values of heat exchangers is evaluated. </LI> <LI> Multi-objective optimization of the exergetic efficiency and the UA values of heat exchangers is carried out. </LI> </UL> </P>
Optical Spectroscopic Analysis Techniques to Detect Elemental Profile of Human Teeth Dentine
Saifullah Jamali,Muhammad Aslam Khoso,Irfan Ali Sanjrani,Hussain Saleem,Tariq Ali Siyal,Muhammad Ashraf,Mansoor Ahmed Memon,Ghulam Murtaza,Zahid Hussain Arain,Zaheer Ahmed Ujjan,Muhammad Niaz Laghari International Journal of Computer ScienceNetwork S 2023 International journal of computer science and netw Vol.23 No.3
Numerous articles under the study and the examination of heavy metals in human teeth have been published in recent years. The heavy metal poisoning is a widespread issue emerged in toxicology area these days. It has been discovered that long-term exposure to heavy metals typically present in traces, in our everyday meals, drinking water, and in the environment as pollution causes heavy metal poisoning in human beings. Industrial effluents, Coal and Oil, as well as a variety of consumer items, such as cosmetics, can all cause this type of exposure. Teeth, which are often thought of as exoskeleton parts, store heavy metals with a high affinity and represent long-term exposure information. In this study, we have chosen and examined the sections of dentine instead, then examined the entire tooth. We have combined the work done on the examination of heavy metals in human teeth using several instrumental approaches e.g. "Optical Spectroscopic Techniques" to detect elemental profile of human teeth in the current study.
Image focus volume regularization for shape from focus through 3D weighted least squares
Ali, Usman,Pruks, Vitalii,Mahmood, Muhammad Tariq Elsevier science 2019 Information sciences Vol.489 No.-
<P><B>Abstract</B></P> <P>In shape from focus (SFF) methods, the accuracy of the depth map highly depends on the quality of image focus volume. Generally, a linear filtering or averaging using a 2D mask is applied on each slice of the focus volume to filter out the noisy focus measures. This approach may not provide optimal results due to the inherent problems associated with linear filtering. In this paper, the image focus volume is regularized by applying 3D weighted least squares (3D-WLS) approach that enhances the volume to better reconstruct the 3D shape. The weights for the regularization have been computed from the image sequence, and here image sequence acts like a structural prior and guidance volume. Such kind of guided filtering of focus volume has not been carried out earlier. 3D-WLS optimization problem has been solved in an efficient separable manner, such that the solution has been approximated by solving a sequence of 1D linear sub-problems. Sequentially for each dimension, a tridiagonal matrix is used to solve the three-point inhomogeneous Laplacian matrix. Experiments conducted on real and synthetic image sequences demonstrate the effectiveness of the proposed method.</P>
Muhammad Abdul Basit,Muhammad Aanish Ali,Zunair Masroor,Zeeshan Tariq,방진호 한국공업화학회 2023 Journal of Industrial and Engineering Chemistry Vol.120 No.-
Quantum dot-sensitized solar cells (QDSSCs) have become important in dealing with the energyeconomy-environment dilemma of today’s world. QDSSCs offer a unique set of characteristics includingmultiple exciton generation and higher extinction coefficients associated with quantum dots (QDs),avowing its potential for high photoconversion efficiency (PCE), which is evident from its augmentedincrease of the PCE to 15 % within the past decade. To make full use of the photoelectrochemical competenceof QDSSCs, researchers have strategically dealt with various detrimental events taking placewithin QDs and on interfacial positions in photoanodes. Back transfer of photogenerated electrons, electron/hole recombination via surface defects, and photocorrosion of QDs seriously deteriorate the performanceof QDSSCs and are thus considered a bottleneck for their further improvements. Deposition ofinterfacial layers (ILs) has proven beneficial in this regard and hence, it requires a comprehensive overview. Based on their positions inside the photoanode of QDSSCs, ILs offer single or multiple roles inimproving the PCE: improvement of surface passivation (passivation ILs), deposition of QDs (seedingILs), and/or control of the back transfer of electrons to the electrolyte (blocking ILs). This review coversthe multifunctional diversity of ILs inside QDSSCs, apposite characterization techniques for ILs, and prospectsregarding their role.
A Study of Aerosol Properties over Lahore (Pakistan) by Using AERONET Data
Muhammad Ali,Salman Tariq,Khalid Mahmood,Asim Daud,Adila Batool,Zia-ul-Haq 한국기상학회 2014 Asia-Pacific Journal of Atmospheric Sciences Vol.50 No.2
It is well established that aerosols affect the climate in avariety of ways. In order to understand these effects, we require aninsight into the properties of aerosols. In this paper we present a studyof aerosol properties such as aerosol optical depth (AOD), singlescattering albedo (SSA) and aerosol radiative forcing (ARF) overmega city of Lahore (Pakistan). The data from Aerosol Robotic Network(AERONET) have been used for the period December 2009 toOctober 2011. The seasonal average values of AOD, asymmetryparameter (ASY) and volume size distribution in coarse mode wereobserved to be highest in summer. On the other hand, the averagevalues of Angstrom exponent (AE) and imaginary part of refractiveindex (RI) were found to be maximum in winter. The average valueof real part of RI was found to be higher in spring than in all otherseasons. The SSA exhibited an increasing trend with wavelength inthe range 440 nm - 1020 nm in spring, summer and fall indicating thedominance of coarse particles (usually dust). However, a decreasingtrend was found in winter in the range 675 nm - 1020 nm pointingtowards the dominance of biomass and urban/industrial aerosols. Asfar as aerosol radiative forcing (ARF) is concerned, we have foundthat during the spring season ARF was lowest at the surface of Earthand highest at top of the atmosphere (TOA). This indicates that theatmosphere was warmer in spring than in all the remaining seasons.