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npj Computational Materials 2023年第1期9卷 1443-1452页

作者： Amirkoushyar Ziabari S.V.Venkatakrishnan zackary snow Aleksander Lisovich Michael Sprayberry Paul Brackman Curtis Frederick Pradeep Bhattad Sarah Graham Philip Bingham Ryan Dehoff Alex Plotkowski Vincent Paquit Energy and Electrification Infrastructure Division Oak Ridge National LaboratoryKnoxvilleTN 37830USA ZEISS Industrial Metrology LLC Maple GroveMN 55369USA Manufacturing Science Division Oak Ridge National LaboratoryOak RidgeTNUSA Materials Science and Technology Division Oak Ridge National LaboratoryOak RidgeTNUSA

Metal additive manufacturing(AM)offers flexibility and cost-effectiveness for printing complex parts but is limited to few *** new alloys requires process parameter optimisation to produce consistent,high-quality ***-resolution X-ray computed tomography(XCT)has not been effective for this task due to artifacts,slow scan speed,and *** propose a deep learning-based approach for rapid XCT acquisition and reconstruction of metal AM parts,leveraging computer-aided design models and physics-based simulations of nonlinear interactions between X-ray radiation and *** significantly reduces beam hardening and common XCT *** demonstrate high-throughput characterisation of over a hundred AlCe alloy components,quantifying improvements in characterisation time and quality compared to high-resolution microscopy and *** approach facilitates investigating the impact of process parameters and their geometry dependence in metal AM.

关键词： rapid alloy character

A Brief Review of Elasticity and Viscoelasticity for Solids

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Advances in Applied Mathematics and Mechanics 2011年第1期3卷 1-51页

作者： Harvey Thomas Banks Shuhua Hu zackary R.Kenz Center for Research in Scientific Computation and Department of Mathematics North Carolina State UniversityRaleighNC 27695-8212USA

There are a number of interesting applications where modeling elastic and/or viscoelastic materials is fundamental,including uses in civil engineering,the food industry,land mine detection and ultrasonic *** we provide an overview of the subject for both elastic and viscoelastic materials in order to understand the behavior of these *** begin with a brief introduction of some basic terminology and relationships in continuum mechanics,and a review of equations of motion in a continuum in both Lagrangian and Eulerian *** complete the set of equations,we then proceed to present and discuss a number of specific forms for the constitutive relationships between stress and strain proposed in the literature for both elastic and viscoelastic *** addition,we discuss some applications for these constitutive ***,we give a computational example describing the motion of soil experiencing dynamic loading by incorporating a specific form of constitutive equation into the equation of motion.

关键词： Mathematical modeling Eulerian and Lagrangian formulations in continuum mechanics elasticity viscoelasticity computational simulations in soil constitutive relationship

Linking landforms and land use to land degradation in the Middle River Njoro Watershed

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International Soil and Water Conservation Research 2014年第2期2卷 1-10页

作者： zackary G.Mainuri James O.Owino Department of Crops Horticulture and Soil ScienceEgerton UniversityP.O.Box 536EgertonKenya

Land degradation is the decline in the productive capacity of an *** mainly occurs due to processes induced by human activities,such as deforestation,poor farming practices,or enhanced industrial growth leading to various land degradation processes such as,flooding,drought and accelerated *** objective of the study was to link landforms and land uses to land *** in the catchments were distinguished on the basis of Physiographic,parent material/geology and soil *** soil mapping units were identified in the *** validity of the identified soil mapping units were checked in the field using auger hole,mini pits,road and erosion cut *** profile pits were sighted in the major mapping *** profile pits were described according to FAO(1977)and Kenya Soil Survey(1987).Soil classification was done according to FAO/UNESCO(1997).Soil mapping units were found to follow soil physiographic units/land *** on mountains and hills were found to be somewhat excessively drained,shallow to moderately *** from uplands and plateaus were well drained,deep to very *** on plains fell on two extremes;those that were well drained,deep to very deep and those that were imperfectly drained to poorly drained,moderately deep to very ***,chemical and biological land degradation was found to take place in the different physiographic units/land forms at varying *** erosion,nutrient depletion and vegetation depletion were found to be the most important degradation ***,physiographic units,soil susceptibility and hazard maps were drawn and their classes in the different landforms established.

关键词： Land use Landform Land degradation

Supranutrition of microalgal docosahexaenoic acid and calcidiol improved growth performance,tissue lipid profiles,and tibia characteristics of broiler chickens

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Journal of Animal Science and Biotechnology 2023年第4期14卷 1542-1550页

作者： Sahil Kalia Andrew D.Magnuson Tao Sun Guanchen Liu Woo Kyun Kim zackary Johnson Xin Gen Lei Department of Animal Science Cornell University252 Morrison HallIthacaNY 14850USA Department of Poultry Science University of GeorgiaAthensGAUSA Nicholas School of the Environment Duke UniversityBeaufortNCUSA

Background Docosahexaenoic acid(DHA)and calcidiol could be enriched in chicken for improving public nutrition and *** remains unclear if supranutritional levels of DHA and calcidiol impair growth performance or metabolism of broiler *** study was to determine singular and combined effects of high levels of supplemental DHA-rich microalgal biomass or oil and calcidiol on growth performance,concentrations of triglycerides,cholesterol,and nonesterfied fatty acids in plasma,liver,breast,and thigh,and biophysical properties of *** In Exp.1,144 day-old Cornish chicks were divided into 4 groups(6 cages/treatment,6 birds/cage),and were fed a corn-soybean meal basal diet(BD),BD+10,000 IU calcidiol/kg(BD+Cal),BD HA),and BD+1%DHA-rich Aurantiochytrium(1.2 g DHA/kg;BD+D+Cal+DHA for 6 *** Exp.2,180 day-old chicks were divided into5 groups,and were fed:BD,BD+DHA(0.33%to 0.66%oil,1.5 to 3.0 g DHA/kg),BD EPA/kg),BD+DHA+EPA(1.9%to 3.8%eicosapentaenoic acid-rich Nannochloropsis ***18,0.3 to 0.6 g BD+DHA+calcidiol(6000 to 12,000 IU/kg diet),and+DHA+EPA+Cal for 6 *** Birds fed BD+Cal diet in Exp.1 and BD lower(P+DHA<0.05)+EPA diet in Exp.2 had higher(P<0.05)body weight gain(10%-11%)and gain:feed ratio(7%),and total cholesterol and triglyceride concentrations in plasma(18%-54%),liver(8%-26%),breast(19%-26%),and thigh(10%-19%),respectively,over the *** two diets also improved(P<0.05)tibial breaking strength(8%-24%),total bone volume(2%-13%),and(or)bone mineral density(3%-19%)of *** Supranutrition of dietary calcidiol and DHA alone or together did not produce adverse effects,but led to moderate improvements of growth performance,lipid profiles of plasma and muscle,and bone properties of broiler chickens.

关键词： Broiler Calcidiol Growth performance Microalgae Tibia

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前世今生流芳千年的文成公主

四川省情 2015年第4期 52-53页

作者： Christine RichardFung zackary

题记一段传唱千年的美好传说，家喻户晓；一个西藏人民心中的绿度母，世代颂扬。前世，文成公主谱写了一段藏汉和美史诗；今生，《文成公主》成为拉萨最耀眼的一道光芒。

关键词：《文成公主》历史剧内容介绍文化传统

Epidemiological Aspects of Diabetic Retinopathy at the Center of the Application of the Diploma of Specialised Studies in Ophthalmology (Cadeso)/Donka-Conakry

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Advances in Infectious Diseases 2022年第3期12卷 533-546页

作者： Sonassa Diané Ibrahima Fofana Thierno Madiou Bah Moussa Diawara zackary Adamou Touré Oscar Adebayo Tonouheoua Tamba Mina Millimouno Sévérin Boni Gamal Abdel Nasser University of Conakry Conakry Guinea Maferinya National Rural Health Training and Researcher Center Forecariah Guinea CHU of Cocody Cocody Abidjan

Purpose: The authors analyzed the epidemiological and clinical aspects of diabetic retinopathy at the Center for the Application of the Specialized Studies Diploma in Ophthalmology, Gamal Abdel Nasser University (CHU/ Donka) Conakry. Diabetic retinopathy (eye damage: eye and retina) is a serious complication of diabetes that affects 50% of type 2 diabetic patients. The eyes are particularly sensitive to damage to a small vessel. Diabetic retinopathy (DR) is the retinal localization of diabetic micro angiopathy resulting in impaired blood flow in the affected territories, the consequences of which will determine the clinical manifestations of the disease. DR is the leading cause of vision loss in adults of working age. Patients and Methods: This is a longitudinal prospective study carried out at CADES/O concerning 198 diabetic patients. The selection criteria were that the media be transparent and the fundus accessible over a period of six months from February to July 2018. Results: A total of 73 patients (37%) presented with diabetic retinopathy with an average age of 49.5 +/−9 years. The sex ratio (M/F) was 0.6 with a female predominance of 59%. Liberal profession patients were the most numerous 47.5%. Type 2 diabetes was the most common (85.86%). Diabetes fundus assessment was the most common reason for consultation (52%). Arterial hypertension was the most incriminated risk factor (45.45%) followed by the poor balance of diabetes (40.90%), and the age of diabetes (28.28%). 9.5% had diabetic retinopathy complicated by rubella iris, neovascular glaucoma and retinal detachment. Conclusion: Diabetic retinopathy is a common condition for which early detection and regular monitoring must be the rule to prevent, slow down or avoids irreversible blindness if possible, induced by this pathology by a good balance of diabetes and good control of associated risk factors.

关键词： Diabetic Retinopathy Epidemiology Center for the Application of the Specialized Studies Diploma in Ophthalmology (CADES/O)