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The Biometric Prison: Technological Advancements in Tracking Inmates and Staff
Walker,Jeffrey T.,Rocio Roles 아시아교정포럼 2012 교정담론 Vol.6 No.1
이 연구는 교도소에서 바이오메트릭 기술의 이용의 기본을 다룬다. 이를 위해 먼저 출입통제의 역사와 바이오메트릭 기술을 소개한다. 그리고 현재의 바이오메트릭 기술과 이것이 교도소의 작동을 어떻게 변화시키는지를 다룬다. 바이오메트릭 시스템을 현장에서 사용하는 것은 이 연구의 제 삼장에서 다룬다. 미래의 바이오메트릭 기술 및 기술의 발달과 함께 앞으로 교도소가 어떻게 변할지를 살펴보며 마무리 짓는다.
Effect of Heterocyclic Anchoring Sequence on the Properties of Dithienogermole-Based Solar Cells
Walker, Bright,Han, Daehee,Moon, Mijin,Park, Song Yi,Kim, Ka-Hyun,Kim, Jin Young,Yang, Changduk American Chemical Society 2017 ACS APPLIED MATERIALS & INTERFACES Vol.9 No.8
<P>The synthesis and characterization of two new small molecular donor materials, DTGe(ThFBTTh2)(2) and DTGe(FBTTh3)(2), are presented for application in organic solar cells. These two materials represent structural evolutions of the high-efficiency, dithienogermole (DTGe)-cored small molecule DTGe(FBTTh2)(2), in which the conjugation length in the backbone was extended by incorporating additional thiophene units. Using the same molecular framework, we have evaluated how the anchoring sequence of heterocyclic units influences material properties and function in solar cell devices. It was found that incorporating additional thiophene units into the backbone, regardless of the position in the molecular platform, caused a small reduction in band gaps; however, both highest occupied molecular orbitals and lowest unoccupied molecular orbital energy bands were at lower energies when the thiophenes were incorporated near the terminus of the molecule. The film morphologies of both materials could be controlled by either thermal or solvent vapor annealing to yield phase separation on the order of tens of nanometers and improved crystallinity. Peak power-conversion efficiencies of 3.6% and 3.1% were obtained using DTGe(ThFBTTh2)(2) and DTGe(FBTTh3)(2), after solvent vapor treatment and thermal annealing, respectively. Our study provides a detailed analysis of how the ordering sequence of heterocyclic building blocks influences the properties and function of organic solar cells.</P>
Hybrid microcatheter angioplasty for refractory cerebral vasospasm
Walker Melanie,Erdoes Morgan P.,Stricker Chloe G.,Bothell Julie,Kelly Cory M.,Levitt Michael R. 대한뇌혈관외과학회 2021 Journal of Cerebrovascular and Endovascular Neuros Vol.23 No.2
Cerebral vasospasm is a significant cause of morbidity and mortality associated with aneurysmal subarachnoid hemorrhage (aSAH). Intra-arterial chemical and mechanical angioplasty, performed alone or in combination, have been shown to ameliorate cerebral vasospasm and improve patient outcomes. Few options exist for patients who fail these traditional endovascular tactics. We propose a hybrid microcatheter technique that combines the mechanical benefit of transient high pressure induced by microcatheter fluid bolus with a low-dose vasodilator infusion. Five patients with moderate to severe symptomatic vasospasm who failed medical and traditional endovascular management were treated using a hybrid microcatheter technique. All angioplasty procedures were technically successful, and the degree of vasospasm improved following angioplasty. There were no complications related to the cerebral angioplasty procedures. None of the patients required repeat endovascular intervention. Hybrid microcatheter angioplasty may be a useful complement to mechanical or pharmacological techniques in the endovascular management of intractable cerebral vasospasm after aSAH.
Interfacial engineering for highly efficient organic solar cells
Walker, B.,Choi, H.,Kim, J.Y. Elsevier 2017 CURRENT APPLIED PHYSICS Vol.17 No.3
<P>Interfacial engineering using metal oxides, organic surface modifiers and other materials can effectively enhance the performance of conventional and inverted organic solar cells by reducing energy barriers for charge transport, while improving compatibility between organic active layer and inorganic metal oxides or transparent conducting electrodes. This short review introduces several important classes of interfacial materials which have been widely successful in improving the efficiency of organic solar cells, and covers some of the recent advances in this field. (C) 2016 Elsevier B.V. All rights reserved.</P>
Interactions Between Starches, Sugars, and Emulsifiers in High-Ratio Cake Model Systems
WALKER,C.E.,Kim,C.S. 國立 昌原大學校 基礎科學硏究所 1993 基礎科學硏究所論文集 Vol.4 No.-
The cake flour in a high-ratio cake model system was replaced by a blend of commercial wheat starch, vital gluten, and a lipid mixture of lecithin and ethoxylated mono-diglycerides. Then the wheat starch in the control formula was replaced with corn or potato starch. Lactose or dextrose(glucose) replaced 50% of the sucrose, and additional emulsifier, sucrose ester F-160, or polysorbate 60 also was used. Potato starch produced acceptable cakes, whereas corn starch did not. A 50% dextrose replacement for sucrose improved the cake volume and grain structure with corn starch. The potato starch, lactose, and polysorbate 60 combination produced a significant increase in batter viscosity, but this was not true for corn starch batters containing lactose. The increased batter viscosity tended to aid in air incorporation. Both additional emulsifiers improved all cake volumes. The addition of polysorbate 60 to the wheat starch batter containing lactose produced the highest cake volume with the best grain structure. Dextrose tended to retain more cake crumb moisture. Partial flour replacement by commercial starches might be beneficial in high-ratio cake baking, if proper combinations of starch, sugar, water, and emulsifier are used.
Napole'on Ansieaux,Henry James's Boulogne Tutor
Walker, Pierre A. 한국 헨리제임스 학회 2001 헨리 제임스 연구 Vol.- No.6
Among the "pivotally symbolic passage[s]" (Holly 139) in James's autobiography (such as the Galérie d'Apollon [SBO 196-99] or the "obscure hurt" passages [NSB 414-17]) is the final paragraph of the first autobiographical volume, A Small Boy and Others (234-36). James describes two things in this paragraph, both of which occurred while the James family was residing in the French channel port of Boulogne: his passing out in August 1857 from the initial attack of an almost fatal case of typhus that would leave him ill for two months and his memory of the private tutor who was engaged during his convalescence in the winter of 1857-58 to give him lessons. This tutor, James recalls, was named Ansiot.