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Sweet plasmonics： Sucrose macrocrystals of metal nanoparticles

Nano Research 2015年第3期8卷 860-869页

作者： talha Erdem Zeliha Soran-Erdem Pedro Ludwig Hernandez-Martinez Vijay Kumar Sharma Halil Akcali Ibrahim Akcali Nikolai Gaponik Alexander Eychmeller Hilmi Volkan Demir Departments of Electrical and Electronics Engineering Physics UNAM-National Nanotechnology Research Center and Institute ot Materials Science and Nanotechnology Bilkent University Ankara 06800 Turkey School of Electrical and Electronic Engineering and School of Physical and Mathematical Sciences Nanyang Technological University Singapore 639798 Singapore Physical Chemistry TU Dresden Bergstrasse 66b D-O 1062 Dresden Germany

The realization of plasmonic structures generally necessitates expensive fabrication techniques, such as electron beam and focused ion beam lithography, allowing for the top-down fabrication of low-dimensional structures. Another approach to make plasmonic structures in a bottom-up fashion is colloidal synthesis, which is convenient for liquid-state applications or very thin solid films where aggregation problems are an important challenge. The architectures prepared using these methods are typically not robust enough for easy handling and convenient integration. Therefore, developing a new plasmonic robust platform having large-scale dimensions without adversely affecting the plasmonic features is in high demand. As a solution, here we present a new plasmonic composite structure consisting of gold nanoparticles （Au NPs） incorporated into sucrose macrocrystals on a large scale, while preserving the plasmonic nature of the Au NPs and providing robustness in handling at the same time. As a proof of concept demonstration, we present the fluorescence enhancement of green CdTe quantum dots （QDs） via plasmonic coupling with these Au NPs in the sucrose crystals. The obtained composite material exhibits centimeter scale dimensions and the resulting quantum efficiency （QE） is enhanced via the interplay between the Au NPs and CdTe QDs by 58% （from 24% to 38%）. Moreover, a shortening in the photoluminescence lifetime from 11.0 to 7.40 ns, which corresponds to a field enhancement factor of 2.4, is observed upon the introduction of Au NPs into the QD incorporated macrocrystals. These results suggest that such ＂sweet＂ plasmonic crystals are promising for large-scale robust platforms to embed plasmonic nanoparticles.

关键词： plasmonics macrocrystals metal nanoparticles metal enhancedfluorescence colloidal quantum dots

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A novel model of retinopathy of prematurity in normobaric hyperoxic conditions

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International Journal of Ophthalmology(English edition) 2016年第9期9卷 1265-1270页

作者： Taner Ozgurtas Sercan Tekin Fatih Yesildal Umut Karaca Fevzi Nuri Aydin Muhammed talha Ugurlu Mehmet Ozler Hakan Durukan Department of Medical Biochemistry Gulhane Military Medical Academy Ankara 06010 Turkey School of Medicine Gulhane Military Medical AcademyAnkara 06010 Turkey Department of Medical Biochemistry Diyarbakir Military Hospital Diyarbakir 21100 Turkey Department of Ophthalmology Isparta Military HospitalIsparta 32040 Turkey Department of Biochemistry Sirnak Military HospitalSimak 73000 Turkey Department of Physiology Gulhane Military Medical Academy Ankara 06010 Turkey Department of Ophthalmology Gulhane Military Medical Academy Ankara 06010 Turkey

AIM：To examine changes in retinal vasculature after treatment with different oxygen concentrations from common retinopathy of prematurity（ROP） models and to determine a novel and practical ROP ***：A sample of 14 newborn Sprague-Dawley rats was *** study group（n=7） was exposed to95%oxygen for 4h per day followed by normoxic laboratory conditions for 20 *** cycle was repeated for 14 *** control group（n=7） was subjected to normobaric normoxic *** postnatal day 14（P14）,the two groups were placed in room air for *** P21,the two groups were examined using indirect *** eyes were enucleated for immunofluorescence（IF） staining of the vasculature of retinas and analysis of vascular endothelial growth factor（VEGF）,hypoxia inducible factor-1 alpha（HIF-1α）,placental growth factor（PLGF） in vitreous humor,and then the rats were sacrificed by *** procedures were repeated using another litter of 14 ***：In the study group and under normobaric hyperoxic conditions,retinal neovascularization and peripheral avascular retina were determined in 85%of the rats through indirect ophthalmoscopic *** IF staining of retina of the study group showed retarded peripheral vascular *** difference between the two groups for VEGF,HIF-1α and PLGF concentrations of vitreous humor was statistically significant（P=0.003,0.007,0.027 respectively）.CONCLUSION：Fluctuating oxygen concentrations are primarily responsible for retinal *** new ROP model is practical and applicable for all retinal neovascularization studies,considering the laboratory procedures.

关键词： retinopathy of prematurity vascular endothelial growth factor hypoxia inducible factor-1 alpha placental growth factor fundoscopy retina staining

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Role of supply chain management in target costing

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Journal of Modern Accounting and Auditing 2010年第7期6卷 46-57页

作者： Mohammad talha John B.Raja Department of Accounting ＆ MIS College of Industrial Management King Fahd University of Petroleum ＆ Minerals Dhahran 31261 Saudi Arabia Faculty of Business and Law Multimedia University Bukit Beruang 75450 Melaka Malaysia

Standard costing is used as a control for product costing. But with life cycle becoming shorter, costing should be done at the design and development stage of a product. This is achieved through target *** implementation of target costing and target pricing is done with the ultimate purpose of cost reduction, cost understanding, continuous improvement, competitiveness, early purchasing and supplier involvement, and improved design and accountability by manufacturers. The study explores the participation of the purchasing and supply chain management＇s role in target costing and target pricing process. Supply management plays an active role in monitoring the ongoing cost and performance of suppliers during the early stages of product development. Implementation of target costing and target pricing in various organizations are also explored. Leading Japanese manufacturers have used target costing and target pricing systems to their advantage and the paper also examines the adaptation of the Western companies to these proactive cost management techniques to improve their product development processes.

关键词： target costing supply chain management product lifecycle costing target pricing Kaizen costing

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纳米纤维素及其在食品包装中的应用

纳米纤维素及其在食品包装中的应用

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作者： talha RIAZ 华南理工大学

学位级别：硕士

纤维状水不溶性材料—纤维素被认为是地球上最常见的生物衍生聚合物,是最著名和最欢迎的可再生和可重复使用的原材料。纳米纤维素是至少在一个维度上小于100 nm的纤维素纤维的术语。纳米纤维素原纤维天然较小且亲水,因为它们的表面有很... 详细信息

纤维状水不溶性材料—纤维素被认为是地球上最常见的生物衍生聚合物,是最著名和最欢迎的可再生和可重复使用的原材料。纳米纤维素是至少在一个维度上小于100 nm的纤维素纤维的术语。纳米纤维素原纤维天然较小且亲水,因为它们的表面有很多羟基。它们有90%是结晶的,直径在10到100 nm之间。本文介绍了纳米纤维素的工艺、特性和用途,重点介绍了食品包装。广泛的行业可能会受益于纳米纤维素的使用,它可以应对多项环境挑战。作为用于涂层、自立薄膜和复合材料制造的可生物降解填料,它具有独特而有趣的特性。很少对用于包装已涂有纳米纤维素的食品的复合材料进行评估。对于由生物聚合物和合成聚合物制成的复合材料的机械和阻隔性能,纳米纤维素增强材料已显示出希望。在这篇文章中,我们全面概述了纳米纤维素制造的当前发展及其作为填料在创建用于食品包装的纳米复合材料中的用途。

关键词：纳米纤维素提取纳米技术应用食品包装

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Attitude Control Experiments of Cubic Rover on Low-Gravity Testbed

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Transactions of Nanjing University of Aeronautics and Astronautics 2022年第2期39卷 143-151页

作者： ZENG Xiangyuan JIANG Bowen HUSSAIN Muhammad talha JIANG Jianxun YANG Runyi School of Automation Beijing Institute of TechnologyBeijing 100081P.R.China System Engineering Research Institute China State Shipbuilding CorporationBeijing 100094P.R.China

In-situ exploration of asteroid surfaces is of great scientific *** actuated rovers have been released to asteroid surfaces but without enough *** investigate the attitude control characteristics of the cubic rover for asteroid surface exploration,a series of experiments are carried out using the self-designed rover and the low-gravity *** experiments focus on two major themes:The minimum flywheel speed for cubic rover to produce a walking motion in different conditions,and the relationship between the rover’s rotation angle and the flywheel speed in twisting *** rover’s dynamical descriptions of the walking and twisting motions are first *** features and design of the low-gravity testbed are then summarized,including its dynamics,setup,and validation.A detailed comparison between the dynamic model and the experimental results is presented,which provides a basic reference of the cubic rover’s attitude control in low-gravity environments.

关键词： cubic rover low-gravity testbed walking motion twisting motion planetary exploration

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Efficacy and safety of thermobalancing therapy with Dr Allen’s Device for chronic low back pain:A randomised controlled trial

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World Journal of Orthopedics 2023年第12期14卷 878-888页

作者： Simon Allen Abid Rashid Ariana Adjani Muhammad Akram Fahad Said Khan Rehan Sherwani Muhammad talha Khalil Director and Head of Medical Research Fine TreatmentOxford OX27SLUnited Kingdom Director of Faculty of Medical Sciences Government College University FaisalabadFaisalabad 38000Pakistan Senior Researcher Fine TreatmentOxford OX27SLUnited Kingdom Department of Eastern Medicine Government College University FaisalabadFaisalabad 38000Pakistan Faculty of Medical and Health Sciences University of Poonch RawalakotRawalakot 12350Pakistan College of Statistical and Actuarial Science University of the PunjabLahore 54000Pakistan

BACKGROUND Lumbar disc herniation and non-specific low back pain are common conditions that seriously affect patients’health-related quality of life(HRQoL).Although empirical evidence has demonstrated that novel Thermobalancing therapy and Dr Allen’s Device can relieve chronic low back pain,there have been no randomised controlled trials for these *** To evaluate the efficacy of Dr Allen’s Device in lumbar disc herniation(LDH)and non-specific low back pain(NSLBP).METHODS A randomised clinical trial was conducted investigating 55 patients with chronic low back pain due to LDH(n=28)or NSLBP(n=27),out of which 15 were randomly assigned to the control group and 40 were assigned to the treatment *** intervention was treatment with Dr Allen’s Device for 3 *** in HRQoL were assessed using the Numerical Pain Rating Scale and the Japanese Orthopedic Association Back Pain *** Thermobalancing therapy with Dr Allen’s Device showed a significant reduction in pain in the treatment group(P<0.001),with no recorded adverse *** pain assessment scales showed a significant improvement in patients’perception of pain indicating improvement in *** The out-of-hospital use of Thermobalancing therapy with Dr Allen’s Device for Low Back Treatment relieves chronic low back pain significantly and without adverse effects,improves the level of activity and HRQoL among patients with LDH and *** study demonstrates the importance of this safe first-line therapy that can be used for effective at-home management of chronic low back pain.

关键词： Chronic low back pain Lumbar disc herniation Non-specific low back pain Thermobalancing therapy Dr Allen’s Device Numerical pain rating scale

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非正规住区的街道网络基础设施评价 ——以坦桑尼亚桑给巴尔基努尼的研究为例

非正规住区的街道网络基础设施评价 —...

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作者： ALI,talha KHAMIS 北京交通大学

学位级别：硕士

可持续社区的基本增长、当地的小镇甚至特大城市在基础设施方面的进步,其中可能包括不同等级的道路、建筑和绿色基础设施,以促进特定的增长空间和提高城市居民的生活水平。因为街道网络是所有社区中获得邻里活力的基本元素之一,它们提... 详细信息

可持续社区的基本增长、当地的小镇甚至特大城市在基础设施方面的进步,其中可能包括不同等级的道路、建筑和绿色基础设施,以促进特定的增长空间和提高城市居民的生活水平。因为街道网络是所有社区中获得邻里活力的基本元素之一,它们提供了便利的流通和连接方式,并可以促进这些空间的社会、文化、美学和经济改善。本次研究的首要目标是评估非正规居民区的街道网络基础设施,以坦桑尼亚联合共和国桑给巴尔西部B区的基努尼市谢希亚为例。通过案例研究,研究者能够在研究中采用定性和定量两种方法,在选定的领域内有效地开展这项研究。这项研究共涉及基努尼谢希亚社区的88个样本,其中市政官员、城市规划官员和谢希亚领导人有效地参与了这一过程。因此,通过访谈、观察、问卷调查等方式收集到了数据。研究结果包括三个目的:确定基努尼差的街道网络基础设施所造成的主要问题和指标;衡量当地社区在基努尼非正规住区没有正规街道网络的情况下对人们生活的影响;以及确定可以改善基努尼街道网络基础设施的适当方法。为了达到研究目的,在定义了研究差距之后,采用了不同的方法,旨在找出目前基努尼谢希亚的街道网络的主要原因以及由于使用未规划的街道网络而对社区日常经验带来的挑战之间的差距。因此,本研究建议有必要制定知识和技能的基础,来作为对研究区域内街道网络基础设施基本情况的最佳干预,并提出充满活力的实际规划建议。

关键词：评估街道网络基础设施可达性连通性非正规居民点流动

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AP1000非能动安全壳冷却系统热工水力性能分析

AP1000非能动安全壳冷却系统热工水力性能分析

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作者： talha BIN MUJAHID 华北电力大学(北京)

学位级别：硕士

核反应堆安全壳建筑的设计至关重要,其用于提高核电站的安全性。由于如TMI,切尔诺贝利和福岛县的核事故,核电发展中的消极观念越来越受到重视。为了改善的新一代核电站的安全性,非能动系统被广泛使用,AP1000中的非能动安全壳冷却系统就... 详细信息

核反应堆安全壳建筑的设计至关重要,其用于提高核电站的安全性。由于如TMI,切尔诺贝利和福岛县的核事故,核电发展中的消极观念越来越受到重视。为了改善的新一代核电站的安全性,非能动系统被广泛使用,AP1000中的非能动安全壳冷却系统就是这类系统的典例之一。它的作用是在冷却剂丧失（LOCA）,主蒸汽管道破裂（MSLB）等事故发生时,将安全壳内产生的热量转移到大气中,并将容器内的压力保持在阈值以下。系统设计和安全分析需要一个模拟系统行为的合适模型,并采用多卷集总参数方法来分析容器完整性并研究假定的冷却剂失水事故（LOCA）和主蒸汽管道断裂（MSLB）事故。然而,对研究安全壳中的T-H特性很重要的温度和压力分布却不能用这种模型详细描述。在本研究中,Matlab软件被使用于建立基于集总参数法的PCCS模型,并与WGOTHIC的计算结果进行比较,说明该点模型具有可靠性。然后对输入参数进行过滤,选择中断的气温,风速和排放数据作为研究对象计算,并分析了基于不同输入参数组合的结果。再将这些结果与西屋设计控制文件（DCD）2002中的结果进行比较。通过分析计算结果表明,在LOCA下,气温和风速会影响峰值出现的时间。温度越低,压力峰值出现越晚。此外,还使用ANSYS FLUENT对LOCA进行模拟,并进行分析。在研究的第二阶段,LOCA的T-H分析是通过考虑PCCS中的降膜蒸发的热量去除因子来进行的。为此应用了 ANSYS FLUENT中的Eulerian Wall Film模型来研究上述现象。分析了 PCCS外部气流路径中液膜和蒸汽混合气体之间的传质,并表现出其良好的性能。

关键词：非能动安全壳冷却系统 AP1000 DBA MATLAB FLUENT

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L形实验段中两相流空泡份额的差压测量方法研究

L形实验段中两相流空泡份额的差压测量方法研究

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作者： ANSARI talha QASIM 华北电力大学(北京)

学位级别：硕士

空泡份额在两相流体积计算中是一个重要的过程变量。读数不准确,可能会导致数据和安全性的潜在损失。由于核工业上高安全标准,空泡份额是十分重要的。在内径为40mm的L形台架中,气水两相流由水平段流入竖直段台架,气体和液体速度分别从0... 详细信息

空泡份额在两相流体积计算中是一个重要的过程变量。读数不准确,可能会导致数据和安全性的潜在损失。由于核工业上高安全标准,空泡份额是十分重要的。在内径为40mm的L形台架中,气水两相流由水平段流入竖直段台架,气体和液体速度分别从0到0.1988m/s和0.2209m/s到0.6629m/s。分别测量泡状流和弹状流下的压降。水平测量段安装差压传感器,传感器两端的压力感应线长度为lm。竖直段安装有两个绝压传感器和一个差压传感器,压力感应线长度与水平段相同。通过与广泛接受的贝格＆布里尔和弗里德尔的相关关系,对实验的压降结果进行了验证。实验压降结果与贝格和布里尔的结果有±3%的误差。将由摩擦压降估测的空泡份额与流体的实际空泡份额进行比较。精确的测量通常因为侵入性(光学探针)或非侵入性(x射线)技术的昂贵成本而受到限制,该研究集中于低成本有效精确测量空泡份额的方法。实验结果表明,空泡份额可以使用垂直截面的绝对压力传感器进行准确估测,而差压传感器引压管内气泡的存在使差压传感器的读数有一些问题。

关键词：两相流空隙率压降

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Spatio-Temporal Land Cover Analysis in Makhawan Watershed (M.P.), India through Remote Sensing and GIS Techniques

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Journal of Geographic Information System 2014年第4期6卷 298-306页

作者： Mohd talha Anees Akram Javed Mohd Yousuf Khanday Department of Geology Aligarh Muslim University Aligarh India Geological Survey of India Srinagar India

The present study makes an attempt to assess land use/land cover (LU/LC) changes at watershed level through remote sensing and GIS techniques, in Makhawan Watershed, Madhya Pradesh (India). The study involves multi-temporal satellite data of IRS-1D LISS III of 2001 and IRS-P6 LISS III of 2011, which have been analyzed visually. The study reveals that major LU/LC changes were due to the combined effects of many parameters, viz.;decline in average rainfall, more urbanization, sustainable agricultural activities and successful wasteland reclamation programmes. The major LU/LC changes noticed in the watershed decrease in uncultivated land (15.79%), wasteland whereas increases in open scrub (13.99%) and cultivated land. Changes in LU/LC categories are also compared with elevation which shows that most of the changes are associated with low lying areas (lower elevation ranges) except open scrub which shows changes in both low as well as high elevation ranges. Another notable change is the shrinkage of reservoir during 2001-2011 period which is linked to the decline in rainfall over the years.

关键词： Land Use/Land Cover Remote Sensing GIS Watershed

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