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Isochrone Fitting of Galactic Globular Clusters—Ⅵ.High-latitude Clusters NGC 5024 (m53),NGC 5053,NGC 5272 (m3),NGC 5466,and NGC7099 (m30)

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Research in Astronomy and Astrophysics 2024年第6期24卷 170-190页

作者： G.A.Gontcharov S.S.Savchenko A.A.marchuk C.J.Bonatto O.S.Ryutina m.Yu.Khovritchev V.B.Il'in A.V.mosenkov D.m.Poliakov A.A.Smirnov Central(Pulkovo)Astronomical Observatory Russian Academy of SciencesPulkovskoye chaussee 65/1St.Petersburg 196140Russia Saint Petersburg State University Universitetskij pr.28St.Petersburg 198504Russia Special Astrophysical Observatory Russian Academy of Sciences369167 Nizhnij ArkhyzRussia Departamento de Astronomia Instituto de FísicaUFRGSAv.Bento Gonçalves9500Porto AlegreRSBrazil Saint Petersburg University of Aerospace Instrumentation Bol.Morskaya ul.67ASt.Petersburg 190000Russia Department of Physics and Astronomy Brigham Young UniversityN283 ESCProvoUT 84602USA

We fit various color–magnitude diagrams(CmDs) of the high-latitude Galactic globular clusters NGC 5024(m53),NGC 5053,NGC 5272(m3),NGC 5466,and NGC 7099(m30) by isochrones from the Dartmouth Stellar Evolution Database and Bag of Stellar Tracks and Isochrones for α–enrichment [α/Fe] = +*** the CmDs,we use data sets from Hubble Space Telescope,Gaia,and other sources utilizing,at least,25 photometric filters for each *** obtain the following characteristics with their statistical uncertainties for NGC 5024,NGC 5053,NGC 5272,NGC 5466,and NGC 7099,respectively:metallicities [Fe/H] =-1.93 ± 0.02,-2.08 ± 0.03,-1.60 ± 0.02,-1.95 ± 0.02,and-2.07 ± 0.04 dex with their systematic uncertainty 0.1 dex;ages 13.00 ± 0.11,12.70 ± 0.11,11.63 ± 0.07,12.15 ± 0.11,and 12.80 ± 0.17 Gyr with their systematic uncertainty 0.8 Gyr;distances(systematic uncertainty added) 18.22 ± 0.06 ± 0.60,16.99 ± 0.06 ± 0.56,10.08 ± 0.04 ± 0.33,15.59 ±0.03 ± 0.51,and 8.29 ± 0.03 ± 0.27 kpc;reddenings E(B-V) = 0.023 ± 0.004,0.017 ± 0.004,0.023 ± 0.004,0.023 ± 0.003,and 0.045 ± 0.002 mag with their systematic uncertainty 0.01 mag;extinctions AV= 0.08 ± 0.01,0.06 ± 0.01,0.08 ± 0.01,0.08 ± 0.01,and 0.16 ± 0.01 mag with their systematic uncertainty 0.03 mag,which suggest the total Galactic extinction AV= 0.08 across the whole Galactic dust to extragalactic objects at the North Galactic *** horizontal branch morphology difference of these clusters is explained by their different metallicity,age,mass-loss efficiency,and loss of low-mass members in the evolution of the core-collapse cluster NGC 7099 and loose clusters NGC 5053 and NGC 5466.

关键词： (stars:)Hertzsprung Russell and C-m diagrams (ISm:)dust extinction (Galaxy:)globular clusters:general (Galaxy:)globular clusters:individual(NGC 5024,NGC 5053,NGC 5272,NGC 5466,NGC7099)

An Overview of Soil Improvement through Ground Grouting

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Journal of Geoscience and Environment Protection 2024年第1期12卷 51-63页

作者： md Ratan Bhuiyan Salequr Rahman masum md Tushar Parvej S m Sanuwar School of Civil Engineering Hydraulic Engineering Tianjin University Tianjin China College of Civil Engineering and Architecture China Three Gorges University Yichang China

Soil is an essential component of what surrounds us in nature, providing as the basis for our infrastructure and construction. However, soil is not always suitable for construction due to a variety of geotechnical issues such as inadequate bearing capacity, excessive settlement, and liquefaction susceptibility. Through improving the engineering qualities of soil, such as strength, permeability, and stability, ground grouting is a specific geotechnical method used. Using a fluid grout mixture injected into the subsurface, holes are filled and weak or loose strata are solidified as the material seeps into the soil matrix. The approach’s adaptability in addressing soil-related issues has made it more well-known in the fields of civil engineering and construction. In the end, this has improved groundwater management, foundation support, and overall geotechnical performance.

关键词： Grouting Soil Improvement Permeation Grouting Compaction Grouting and Jet Grouting

Beyond Stitches: Analysis of Disease Burden in a Bangladeshi RmG Factory

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Health 2024年第7期16卷 688-702页

作者： mariam Zaman Tayeb Ahmmed Nabila Binte Hossain S. m. Raysul Haque Ariful Islam Joarder Kamran ul Baset Department of Procurement SM Group Dhaka Bangladesh Department of Neurosurgery Bangabandhu Sheikh Mujib Medical University (BSMMU) Dhaka Bangladesh Department of Public Health Independent University Bangladesh (IUB) Dhaka Bangladesh Department of Cardiology Bangabandhu Sheikh Mujib Medical University (BSMMU) Dhaka Bangladesh

Introduction: Bangladesh has experienced remarkable growth in RmG over the past 25 years. With the knitwear industry providing more than 4 million direct jobs, providing better occupational health and safety of workers remains a challenge. Aim of the study: The aim of the study was to analyze the disease burden of a RmG factory, and to highlight occupational health risks. methods: A cross-sectional study design was employed for this analysis. A 17-month data entry (January 2020 - may 2021) was gathered from the factory in-house clinic. The socio-demographic and clinical diagnosis entries of 8421 entries were analyzed. Result: The population of the factory workers is 5370, where 40% (2148) are female workers and 60% (3222) are male workers. The mean age of respondents is 30 years, with a SD of ±7 years. Among the chief complaints, the most common was vomiting (14%;2262) fever (14%;2247), runny nose (11%;1842), cough (9%;1465), and loose motion (8%;1364). In the diagnosis categories, gastrointestinal diseases were more predominantly diagnosed (35%;2978), followed by viral fever (21%;1772), neurological diseases (16.5%;1389) and musculoskeletal disorders (9%;768). The average cost of medicine for each respondent is BDT 36. The factory covered costs of all medication for 99% (8380) of respondents. Only 0.5% (37) was referred to a tertiary hospital for further evaluation. Conclusion: Garments workers suffer mostly from long-term occupational health hazards. Factory owners and policy makers can contribute in various ways to improving primary healthcare options for workers.

关键词： RmG Disease Burden Work Related Disease Communicable Disease Occupational Safety

Boundary conditions for porous solids saturated with viscous fluid

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Applied mathematics and mechanics(English Edition) 2009年第7期30卷 821-832页

作者： m.D.Sharma Department of mathematics Kurukshetra University

Boundary conditions are derived to represent the continuity requirements at the boundaries of a porous solid saturated with viscous fluid. They are derived from the physically grounded principles with a mathematical check on the conservation of energy. The poroelastic solid is a dissipative one for the presence of viscosity in the interstitial fluid. The dissipative stresses due to the viscosity of pore-fluid are well represented in the boundary conditions. The unequal particle motions of two constituents of porous aggre~ gate at a boundary between two solids are explained in terms of the drainage of pore-fluid leading to imperfect bonding. A mathematical model is derived for the partial connec- tion of surface pores at the porous-porous interface. At this interface, the loose-contact slipping and partial pore opening/connection may dissipate a part of strain energy. A numerical example shows that, at the interface between water and oil-saturated sandstone, the modified boundary conditions do affect the energies of the waves refracting into the isotropic porous medium.

关键词： porous solid dissipative boundary conditions

Rare earth metal doped CeO_2-based catalytic materials for diesel soot oxidation at lower temperatures

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Journal of Rare Earths 2015年第11期33卷 1162-1169页

作者： A.Rangaswamy Putla Sudarsanam Benjaram m.Reddy Inorganic and Physical Chemistry Division CSIR-Indian Institute of Chemical Technology Centre for Advanced materials and Industrial Chemistry (CAmIC) School of Applied Sciences RMIT University

In this work, the influence of trivalent rare-earth dopants（Sm and La） on the structure-activity properties of CeO2 was thoroughly studied for diesel soot oxidation. For this, an optimized 40% of Sm and La was incorporated into the CeO2 using a facile coprecipitation method from ultra-high dilute aqueous solutions. A systematic physicochemical characterization was carried out using X-ray diffraction（XRD）, transmission electron microscopy（TEm）, Brumauer-Emmett-teller method（BET） surface area, X-ray photoelectron spectroscopy（XPS）, Raman, and H2-temperature programmed reduction（TPR） techniques. The soot oxidation efficiency of the catalysts was investigated using a thermogravimetric method. The XRD results suggested the formation of nanocrystalline single phase CeO2-Sm2O3 and CeO2-La2O3 solid solutions. The Sm- and La-doped CeO2 materials exhibited smaller crystallite size and higher BET surface area compared with the pure CeO2. Owing to the difference in the oxidation states of the dopants（Sm3＋ and La3＋） and the Ce4＋, a number of oxygen vacancies were generated in CeO2-Sm2O3 and CeO2-La2O3 samples. The H2-TPR studies evidenced the improved reducible nature of the CeO2-Sm2O3 and CeO2-La2O3 samples compared with the CeO2. It was found that the addition of Sm and La to the CeO2 outstandingly enhanced its catalytic efficiency for the oxidation of diesel soot. The observed 50% soot conversion temperatures for the CeO2-Sm2O3, CeO2-La2O3 and CeO2 were ~790, 843 and 864 K（loose contact）, respectively, and similar activity order was also found under the tight contact condition. The high soot oxidation efficacy of the CeO2-Sm2O3 sample was attributed to numerous catalytically favourable properties, like smaller crystallite size, larger surface area, abundant oxygen vacancies, and superior reducible nature.

关键词： rare earths cerium oxide solid solutions oxygen vacancies soot oxidation

An insight into the mechanical behavior of binary granular soils

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Particuology 2015年第4期13卷 82-89页

作者： F.Vahidi-Nia A.Lashkari S.m.Binesh Department of Civil and Environmental Engineering Shiraz University of Technology

This paper investigates the participation of the fines fraction in the load-carrying structure of binary mixtures of granular soils. For this purpose, various fractions of two fine sands were added to two coarse sands with the same particle size distribution, but different particle shape characteristics. Based on the results of 144 direct shear tests, it was found that fines participation in the load-bearing structure increases with fines content. At the same fines content, the participation of the fines in the load-carrying structure of loose mixtures is greater than in samples that were initially compacted. In addition, it was observed that fines participation rises with the increase in the average size of the fines fraction.

关键词： Sand Particle size ratio Fines content Fines participation factor lntergranular void ratio

Cardiac myxomas:A narrative review

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World Journal of Cardiology 2022年第4期14卷 206-219页

作者： A K m monwarul Islam Department of Cardiology National Institute of Cardiovascular DiseasesDhaka 1207Bangladesh

Cardiac myxomas are common primary neoplasms of the *** are biologically benign but“functionally malignant”because of the potential for *** arise most commonly from the left atrium,but no chambers of the heart are *** may be sporadic in the majority but also familial as a part of the Carney *** morphological forms exist:polypoid and *** myxomas often present with obstructive features,while the papillary forms are more prone to *** is still controversial;the current view centres around origin from the primitive pluripotent mesenchymal *** may be of giant proportion,be calcified or get *** presentation typically involves the triad of intracardiac obstruction,embolic events and constitutional *** examination findings may simulate those of mitral or tricuspid *** presence of tumour plop and change of the physical findings with changing position may help differentiation between the *** is the investigation of *** polypoid or papillary mobile mass within the atrial cavity remaining attached to the interatrial septum through a stalk are the tell-tale echocardiographic *** magnetic resonance and computed tomographic scanning may have incremental diagnostic *** examination reveals abundant loose myxoid stroma with scattered round,polygonal or stellate cells with dense irregular *** testing may detect mutations in the PRKAR1A gene in the familial form of cardiac myxoma,*** Carney *** excision is the mainstay of treatment with low operative mortality,excellent postoperative survival and low recurrence *** current trend favours minimal-access surgery with or without robotic *** should have appropriate preparedness to make a timely diagnosis and enthusiastic treatment to avoid potentially fatal complications.

关键词： myxoma Cardiac Neoplasm Carney Complex Echocardiography Embolism

LDH conversion films for active protection of AZ31 mg alloy

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Journal of magnesium and Alloys 2023年第1期11卷 201-216页

作者： B.Pillado B.mingo R.del Olmo E.matykina A.m.Kooijman Y.Gonzalez−Garcia R.Arrabal m.mohedano Departamento de Ingeniería Química y de materiales Facultad de Ciencias QuímicasUniversidad ComplutenseMadrid 28040Spain Department of materials University of ManchesterOxford RoadManchester M139PLUK Institute of Optoelectronics Military University of Technology2 Kaliskiego Str.Warsaw 00-908Poland materials Science and Engineering Department Delft University of TechnologyMekelweg 2Delft 2628 CDthe Netherlands

Zinc aluminium(Zn-Al)and lithium aluminium(Li-Al)–layered double hydroxides(LDH)coatings with incorporated inhibitors(Li-,mo-and W-based)were successfully synthesized on AZ31 mg ***-Al LDH W and Li-Al LDH Li showed the highest corrosion resistance and were selected for further *** cross-section examination revealed a bi-layer structure composed of an outer part with loose flakes and a denser inner ***,FTIR,and XPS analysis confirmed the incorporation of the ***-treatments with corrosion inhibitors containing solutions resulted in the selective dissolution of the most external layer of the LDH coating,reducing the surface roughness,hydrophilicity and paint adhesion of the *** corrosion properties were confirmed by SVET evaluation for the Zn-Al LDH W *** proposed active corrosion mechanism involves the ion-exchange of aggressive Cl-ions,deposition of hydroxides and competitive adsorption of W-rich corrosion inhibitors.

关键词： AZ31 magnesium Layered double hydroxides Corrosion inhibitors Active corrosion protection

Low temperature oxidation of Cr-alloyed moSi_2

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中国有色金属学会会刊：英文版 2007年第6期17卷 1282-1286页

作者： E. Strom Y. Cao Y. m. Yao Kanthal AB Box 502 SE-734 27 Hallstahammar Sweden Department of materials and manufacturing Technology Chalmers University Technology SE-412 96 Gothenburg Sweden

Cr-alloyed moSi2 was compared with monolithic moSi2 with respect to oxidation at 450 ℃ for 456 h. Phases formed on Cr-alloyed moSi2 after exposure are Cr2(moO4)3, moO3, and cristobalite (SiO2) according to X-ray diffraction results. monolithic moSi2 forms moO3 and mainly amorphous SiO2. X-ray photoelectron spectroscopy indicates that the main oxidation product on the outermost surface is SiO2 for all studied samples. The samples form a relatively loose oxide but the oxide adherence improves with increasing Cr content. It is indicated that Cr addition can benefit pesting control in moSi2.

关键词：钼硅化合物合金有害物氧化作用