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Study of Complex Nitrogen and Oxygen-bearing Molecules toward the high-mass Protostar IRAS 18089–1732

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Research in Astronomy and Astrophysics 2024年第6期24卷 81-93页

作者： Arijit Manna Sabyasachi pal Tapas Baug Sougata Mondal Department of Physics Midnapore City CollegePaschim MedinipurWest Bengal721129India S.N.Bose National Centre for Basic Sciences Block-JDSector-IIISalt Lake CityKolkata700106 India

The observation of oxygen(O)-and nitrogen(N)-bearing molecules gives an idea about the complex prebiotic chemistry in the interstellar *** millimeter and submillimeter wavelength observations have shown the presence of complex O-and N-bearing molecules in the star formation ***,the investigation of those molecules is crucial to understanding the chemical complexity in the star-forming *** this article,we present the identification of the rotational emission lines of N-bearing molecules ethyl cyanide(C_(2)h_(5)CN)and cyanoacetylene(hC_(3)N),and O-bearing molecule methyl formate(Ch_(3)OChO)toward high-mass protostar IRAS18089–1732 using the Atacama Compact *** also detected the emission lines of both the N-and O-bearing molecule formamide(Nh_(2)ChO)in the envelope of IRAS 18089–*** have detected the v=0 and 1 state rotational emission lines of Ch_(3)*** also detected the two vibrationally excited states of hC_(3)N(v7=1 and v7=2).The estimated fractional abundances of C_(2)h_(5)CN,hC_(3)N(v7=1),hC_(3)N(v7=2),and Nh_(2)ChO toward IRAS 18089–1732 are(1.40±0.5)×10^(-10),(7.5±0.7)×10^(-11),(3.1±0.4)×10^(-11),and(6.25±0.82)×10^(-11)***,the estimated fractional abundances of Ch_(3)OChO(v=0)and Ch_(3)OChO(v=1)are(1.90±0.9)×10^(-9)and(8.90±0.8)×10^(-10),*** also created the integrated emission maps of the detected molecules,and the observed molecules may have originated from the extended envelope of the *** show that C_(2)h_(5)CNand hC_(3)N are most probably formed via the subsequential hydrogenation of the Ch_(2)ChCNand the reaction between C_(2)h_(2)and CN on the grain surface of IRAS 18089–*** found that Nh_(2)ChO is probably produced due to the reaction between Nh_(2)and h_(2)CO in the gas ***,Ch_(3)OChO is possibly created via the reaction between radical Ch_(3)O and radical hCO on the grain surface of IRAS 18089–1732.

关键词： ISM:individual objects(IRA 18089-1732)(except) ISM:abundances ISM:kinematics and dynamics stars:formation astrochemistry

Effect of laminate thickness on moisture diffusion of polymer matrix composites in artificial seawater ageing

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Frontiers of Materials Science 2012年第3期6卷 225-235页

作者： Ratna pal h.N.NARASIMhA MURThY M.SREEJlThz,K.R.VIShNU MAhESh M.krishna IS.C.ShARMA Department of Mechanical Engineering R.V.College of EngineeringBangalore-560059KarnatakaIndia Department of P.G.Studies and Research in Industrial Chemistry Kuvempu UniversityShankaraghattaShimoga-577451KarnatakaIndia Tumkur University Tumkur-572103KarnatakaIndia

The influence of laminate thickness of polymer matrix composites on moisture diffusion in seawater immersion, as well as the resulting mechanical property degradation for composites of glass/isopolyester （G/IPE）, carbon/isopolyester （C/IPE）, glass/vinylester （G/VE） and carbon/vinylester （CNE）, was investigated in this paper. Laminates 3 and 10 mm in thickness, fabricated using the wet hand lay-up technique, were characterized for moisture absorption in artificial seawater medium, and their flexural strength and interlaminar shear strength （ILSS） degradations were studied. Moisture diffusion was observed to be anamolous to the Fick＇s law for both 3 and 10 mm thick samples in the later stage of diffusion. Moisture permeability of 10 mm thick samples was two to three order greater than that of 3 mm thick ones, while the time to moisture saturation remained unchanged. With the increase of laminate thickness, moisture saturation increased by 1.4% for CNE and 7% for GriPE. The residual flexural strength and ILSS were greater in case of 10 mm thick specimens after 200 days of exposure. SEM examination of the fractured specimens showed greater levels of fibre/matrix debonding in 10 mm thick specimens.

关键词： polymer matrix composite diffusion coefficient Fick's law degradation

Incidence of urinary incontinence following endoscopic laser enucleation of the prostate by en-bloc and non-en-bloc techniques:a multicenter,real-world experience of 5068 patients

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Asian Journal of Andrology 2024年第3期26卷 233-238页

作者： Daniele Castellani Vineet Gauhar Khi Yung Fong Mario Sofer Moisés Rodríguez Socarrás Azimdjon N Tursunkulov Lie Kwok Ying Sarvajit Biligere ho Yee Tiong Dean Elterman Abhay Mahajan Mark Taratkin Sorokin Nikolai Ivanovich Tanuj pal Bhatia Dmitry Enikeev Nariman Gadzhiev Mohammed Taif Bendigeri Jeremy Yuen-Chun Teoh Marco Dellabella Fernando Gómez Sancha Bhaskar Kumar Somani Thomas Reinhard William herrmann Urology Unit IRCCS INRCAAncona 60127Italy Urology Unit Marche University HospitalLe Marche Polytechnic UniversityAncona 60126Italy Department of Urology Ng Teng Fong General HospitalSingapore 609606Singapore Yong Loo Lin School of Medicine National University of SingaporeSingapore 117597Singapore Department of Urology Tel Aviv Sourasky Medical CenterAffiliated to the Sackler School of MedicineTel Aviv UniversityTel Aviv 6423906Israel Department of Urology and Robotic Surgery ICUA-Clínica CEMTROMadrid 28701Spain Urology Division Akfa Medline HospitalTashkent 100211Uzbekistan Advanced Urology Gleneagles HospitalSingapore 258499Singapore Department of Urology National University HospitalSingapore 119228Singapore Divisionof Urology Department of SurgeryUniversity of TorontoOntarioToronto M5G 2C4Canada Department of Urology Mahatma Gandhi Mission’s Medical College and HospitalAurangabad 431003India Institute for Urology and Reproductive health Sechenov UniversityMoscow119435Russian Federation Department of Urologyand Andrology Lomonosov Moscow State UniversityMoscow 119992Russian Federation Department of Urology Sarvodaya Hospital and Research CentreFaridabadHaryana 121006India Department of Urology Medical University of ViennaVienna 1090Austria Department of Urology Saint-Petersburg State University HospitalSaint-Petersburg 199034Russian Federation Department of Urology Asian Institute of Nephrology and UrologyHyderabad 500082India S.h.ho UrologyCentre Department of SurgeryFaculty of MedicineThe Chinese University of Hong KongHong Kong 96H2+Q9China Department of Urology University Hospitals Southampton NHS TrustSouthampton SO166YDUnited Kingdom Department of Urology Cantonal Hospital Thurgau AGFraunfeld 8500Switzerland

We aim to evaluate the incidence of incontinence following laser endoscopic enucleation of the prostate(EEP)comparing en-bloc(Group 1)versus 2-lobe/3-lobe techniques(Group 2).We performed a retrospective review of patients undergoing EEP for benign prostaticenlargement in 12 centers between January 2020 and January *** were presented as median and interquartile range(IQR).Univariable and multivariable logistic regression analysis was performed to evaluate factors associated with stress urinary incontinence(SUI)and mixed urinary incontinence(MUI).There were 1711 patients in Group 1 and 3357 patients in Group *** in Group 2were significantly younger(68[62–73]years vs 69[63–74]years,P=0.002).Median(interquartile range)prostate volume(PV)wassimilar between the groups(70[52–92]ml in Group 1 vs 70[54–90]ml in Group 2,P=0.774).There was no difference in preoperativeInternational Prostate Symptom Score,quality of life,or maximum flow ***,morcellation,and total surgical time weresignificantly shorter in Group *** 1 month,overall incontinence rate was 6.3%in Group 1 versus 5.3%in Group 2(P=0.12),and urge incontinence was significantly higher in Group 1(55.1%vs 37.3%in Group 2,Phs,the overall rate ofincontinence was 1.7%in Group 1 versus 2.3%in Group 2(P=0.06),and SUI was significantly higher in Group 2(55.6%vs 24.1%in Group 1,P=0.002).At multivariable analysis,PV and IPSS were factors significantly associated with higher odds of transient SUI/***,surgical time,and no early apical release technique were factors associated with higher odds of persistent SUI/MUI.

关键词： benign prostatic hyperplasia en-bloc enucleation endoscopic enucleation of the prostate laser therapy stress urinaryincontinence urge urinary incontinence

Interaction behavior and load sharing pattern of piled raft using nonlinear regression and LM algorithm-based artificial neural network

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Frontiers of Structural and Civil Engineering 2021年第5期15卷 1181-1198页

作者： Plaban DEB Sujit Kumar pal Department of Civil Engineering G H Raisoni College of Engineering&ManagementPune 412207India Department of Civil Engineering National Institute of TechnologyAgartala 799046India

In the recent era,piled raft foundation(PRF)has been considered an emergent technology for offshore and onshore *** previous studies,there is a lack of illustration regarding the load sharing and interaction behavior which are considered the main intents in the present *** element(FE)models are prepared with various design variables in a double-layer soil system,and the load sharing and interaction factors of piled rafts are *** obtained results are then checked statistically with nonlinear multiple regression(NMR)and artificial neural network(ANN)modeling,and some prediction models are *** models are prepared with Levenberg-Marquardt(LM)algorithm for load sharing and interaction factors through backpropagation *** factor of safety(FS)of PRF is also estimated using the proposed NMR and ANN models,which can be used for developing the design strategy of PRF.

关键词： interaction load sharing ratio piled raft nonlinear regression artificial neural network

Applying Synchronous Condenser for Damping Provision in Converter-dominated Power System

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Journal of Modern Power Systems and Clean Energy 2021年第3期9卷 639-647页

作者： ha Thi Nguyen Guangya Yang Arne hejde Nielsen Peter hΦjgaard Jensen Bikash pal the Department of Electrical Engineering Danmarks Tekniske UniversitetRoskildeDenmark the Electrical Engineering Technical University of DenmarkLyngbyDenmark Siemens AG Sektor Energie BallerupDenmark the Department of Electrical and Electronic Engineering Imperial College LondonLondonUK

The dynamic characteristics of converter-dominated systems are governed by controlling power converters and the interactions between converter systems and conventional *** oscillations can appear under dynamic operation conditions caused by the phase-locked loop dynamics and interactions among the converter control *** oscillations may be poorly damped,which can result in reduced power generation,longer settling time,or disconnections of sensitive *** is foreseeable that damping services will be critical for power grid stabilization in the future with high penetration of renewable *** this work,synchronous condensers(SCs)are evaluated and applied to provide damping services to the power grid under post-event *** innovative supplementary controller for the automatic voltage regulator of SCs is proposed to improve the frequency stabilization in a converter-dominated system after *** local and remote measurements,SCs are able to modulate the reactive power output and hence,the terminal bus voltage,which further impacts the power flow in the system;therefore,damping can be provided to the frequency *** control is implemented on an industrial-level hardware platform,and the performance is verified by the hardware-in-the-loop simulation.

关键词： Power oscillation Prony analysis low-inertia system supplementary controller synchronous condenser(SC)

Soil Respiration, Microbial Biomass C and N Availability in a Sandy Soil Amended with Clay and Residue Mixtures

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Pedosphere 2016年第5期26卷 643-651页

作者： Sharmistha pal Petra MARSChNER ICAR-Indian Institute of Soil and Water Conservation Research Centre School of Agriculture Food and Wine The University of Adelaide

Crop yields in sandy soils can be increased by addition of clay-rich soil, but little is known about the effect of clay addition on nutrient availability after addition of plant residues with different C/N ratios. A loamy sandy soil （7% clay） was amended with a clay-rich subsoil （73% clay） at low to high rates to achieve soil mixtures of 12%, 22%, and 30% clay, as compared to a control （sandy soil alone） with no clay addition. The sandy-clay soil mixtures were amended with finely ground plant residues at 10 g kg-l： mature wheat （Triticum aestivum L.） straw with a C/N ratio of 68, mature faba bean （Vicia faba L.） straw with a C/N ratio of 39, or their mixtures with different proportions （0% 100%, weight percentage） of each straw. Soil respiration was measured over days 0-45 and microbial biomass C （MBC）, available N, and ph on days 0, 15, 30, and 45. Cumulative respiration was not clearly related to the C/N ratio of the residues or their mixtures, but C use efficiency （cumulative respiration per unit of MBC on day 15） was greater with faba bean than with wheat and the differences among the residue mixtures were smaller at the highest clay addition rate. The MBC concentration was lowest in sole wheat and higher in residue mixtures with 50% of wheat and faba bean in the mixture or more faba bean. Soil N availability and soil ph were lower for the soil mixtures of 22% and 30% clay compared to the sandy soil alone. It could be concluded that soil cumulative respiration and MBC concentration were mainly influenced by residue addition, whereas available N and ph were influenced by clay addition to the sandy soil studied.

关键词： available N C use efficiency C/N ratio cumulative respiration nutrient availability ph plant residues

Identification of high-dielectric constant compounds from statistical design

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npj Computational Materials 2022年第1期8卷 1396-1405页

作者： Abhijith Gopakumar Koushik pal Chris Wolverton Department of Materials Science and Engineering Northwestern University2220 Campus DriveEvanstonIL60208USA

The discovery of high-dielectric materials is crucial to increasing the efficiency of electronic devices and ***,we report three previously unexplored materials with very high dielectric constants(69sing statistical optimization algorithms aided by artificial neural networks(ANN).Two of these new dielectrics are mixed-anion compounds(Eu_(5)SiCl_(6)O_(4)and hoClO)and are shown to be thermodynamically stable against common semiconductors via phase diagram *** also uncovered four other materials with relatively large dielectric constants(20hile the ANN training-data are obtained from the Materials Project,the search-space consists of materials from the Open Quantum Materials Database(OQMD)—demonstrating a successful implementation of cross-database materials ***,we report the dielectric properties of 17 materials calculated using ab initio calculations,that were selected in our design *** dielectric materials with high-dielectric properties predicted in this work open up further experimental research opportunities.

关键词： dielectric high constant

Microscopic mechanism of unusual lattice thermal transport in TlInTe_(2)

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npj Computational Materials 2021年第1期7卷 1-8页

作者： Koushik pal Yi Xia Chris Wolverton Department of Materials Science and Engineering Northwestern UniversityEvanstonIL 60208USA

We investigate the microscopic mechanism of ultralow lattice thermal conductivity(κl)of TlInTe_(2)and its weak temperature dependence using a unified theory of lattice heat transport,that considers contributions arising from the particle-like propagation as well as wave-like tunneling of *** we use the Peierls–Boltzmann transport equation(PBTE)to calculate the particlelike contributions(κl(PBTE)),we explicitly calculate the off-diagonal(OD)components of the heat-flux operator within a firstprinciples density functional theory framework to determine the contributions(κl(OD))arising from the wave-like tunneling of *** each temperature,T,we anharmonically renormalize the phonon frequencies using the self-consistent phonon theory including quartic anharmonicity,and utilize them to calculateκl(PBTE)andκl(OD).With the combined inclusion ofκl(PBTE),κl(OD),and additional grain-boundary scatterings,our calculations successfully reproduce the experimental *** analysis shows that large quartic anharmonicity of TlInTe_(2)(a)strongly hardens the low-energy phonon branches,(b)diminishes the three-phonon scattering processes at finite T,and(c)recovers the weaker than T^(−1) decay of the measuredκl.

关键词： lattice phonon harmonic

Purification and concentration of gluconic acid from an integrated fermentation and membrane process using response surface optimized conditions

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Frontiers of Chemical Science and Engineering 2019年第1期13卷 152-163页

作者： Parimal pal Ramesh Kumar Subhamay Banerjee Environment and Membrane Technology Laboratory Chemical Engineering Department National Institute of Technology Durgapur West Bengal 713209 India Department of Chemistry The University of Burdwan West Bengal 713104 India

A response surface method was used to optimize the purification and concentration of gluconic acid from fermentation broth using an integrated membrane system. Gluconobacter oxydans was used for the bioconversion of the glucose in sugarcane juice to gluconic acid (concentration 45 g·L^-1) with a yield of 0.9 g·g^-1. The optimum operating conditions, such as trans-membrane pressure (TMP), ph, cross-flow rate (CFR) and initial gluconic acid concentration, were determined using response surface methodology. Five different types of polyamide nanofiltration membranes were screened and the best performing one was then used for downstream purification of gluconic acid in a flat sheet cross-flow membrane module. Under the optimum conditions (TMP=12 bar and CFR=400 L·h^-1), this membrane retained more than 85% of the unconverted glucose from the fermentation broth and had a gluconic acid permeation rate of 88% with a flux of 161 L·m^-2·h^-1. Using response surface methods to optimize this green nanofiltration process is an effective way of controlling the production of gluconic acid so that an efficient separation with high flux is obtained.

关键词： gluconic acid optimized nanofiltration green processing process intensification