51 research outputs found
Collection efficiency at near-bandgap wavelengths in actual Si solar cells
No full textAn expression for collection efficiency in actual Si solar cells is derived from the expression of Basore for inverse quantum efficiency vs. absorption depth at near-bandgap wavelengths. In the new expression, only internal rear-surface reflectance is an adjustable parameter. The new expression is used in reported actual Si solar cells, where it is compared to different approaches to evaluate collection efficiency including the linear fitting to inverse internal quantum efficiency versus absorption depth. This allows showing experimentally that these approaches are more liable to errors than the proposed expression for collection efficiency. © 2018 Author(s)
Saturation current as a function of sheet resistance in Si
No full textWe present the exact analytical solution to minority-carrier transport in the dark for non-uniformly doped Si regions in low-level injection, where bulk lifetime is inversely proportional to the square of doping density according to the Dziewior and Schmid model of Auger recombination and diffusivity is constant. The relevant expression for emitter saturation current density, J0em, can be set as a function of sheet resistance, RSHEET. Reported measured J0em(RSHEET)-curves in n- and p-type metal-coated emitters are matched by the presented J0em(RSHEET)-expression. To this aim, reported doping functions for band-gap narrowing are set as functions of RSHEET. The application range of the presented solution is checked. © 2018 Author(s)
Simple modeling of intrinsic bulk lifetime in doped silicon
No full textBased on the data in the literature, in highly-doped Si, where Auger recombination predominates, one can observe that, while minority-carrier bulk lifetime is inversely proportional to the square of doping density, diffusivity can be taken as constant. This implies that, at high dopings, diffusion length can be considered as proportional to the reciprocal of doping density. In the present work, we assume that such a dependence of diffusion length on doping holds at lower dopings as well, in the case, where Auger recombination prevails. This allows deriving a very simple expression for Auger lifetime as a function of diffusivity that is used together with a reported expression for radiative lifetime to calculate intrinsic lifetime at all dopings. The new expression for intrinsic lifetime is consistent with reported doping functions for minority-carrier diffusivity and agrees with the data of lifetime for dopings higher than 4×1017 cm-3 in both p-type Si and n-type Si. We exploit the relevant theory to show that such results are due to the fact that, at those doping levels, both diffusivity and Auger recombination are enhanced by electron-hole interaction. © 2018 Author(s)
Arm-based control of a lower limb exoskeleton: Proof of concept of a novel approach based on the shoulder kinematics
No full textRecognising the user’s locomotive intentions is crucial for the correct functionality of exoskeletons and active orthoses. For gait applications, extrapolating control inputs from the arm swing may be worthwhile, since arm oscillations naturally occur during human locomotion. A similar method would be unaffected by severe impairments of the lower limbs, and there is evidence suggesting enhanced results of gait rehabilitation when arms and legs exercise together. In this thesis, we propose a control algorithm to drive online a lower limb exoskeleton through the arm swing. Contrary to a previous EMG-based approach by La Scaleia et al. (2014), our algorithm exploits shoulder kinematic data to mimic “single swinging”, a natural mode of human interlimb coordination which is characterised by each arm swinging in-phase with the contralateral leg. Our proposed control architecture relies on two major modules: an Arm Observer and a Gait Generator. The Arm Observer consists of an adaptive frequency oscillator which extrapolates the frequency and phase of the arm swing by receiving online measurements of the angular shoulder position in the sagittal plane. This data is used by the Gait Generator to compute lower limb trajectories, based on regression models from a previous study by Koopman et al. (2014). We validated our controller through human-subject experiments, involving three participants walking on a treadmill with and without a lower limb exoskeleton, the Lopes II. When feed by data associated with natural walking, our adaptive frequency oscillator could very precisely replicate the arm swing frequency, stride cadence and timing of shoulder flexion peaks when walking faster than 0.5 m/s. When wearing the exoskeleton, our algorithm allowed the participants to cope with constant and variable treadmill velocities in the range of 0.5-1.25 m/s. As such, the results of this thesis show that our proposed approach can extend the applicability of arm-based control to walking speeds suitable for gait rehabilitation and assistance.Mechanical Engineering | BioMechanical Desig
Improving the Balance Between Patient Satisfaction and Efficient ED Throughput
No full textBackground: Patients come into the Emergency Department (ED)when they are having an emergent health concern. One role of the ED nurse is balancing the patient expectations of care with ensuring the flow of the department. The studies reviewed here examine the way that ED nurses can help to coordinate realistic expectations for patients as they are waiting to be seen.https://knowledgeconnection.mainehealth.org/nurseresidency/1021/thumbnail.jp
Porous silicon solar cells
No full textWe developed a new process for the fabrication of crystalline solar cell, based on an ultrathin silicon membrane, taking advantage of porous silicon technology. The suggested architecture allows the costs reduction of silicon based solar cell reusing the same wafer to produce a great number of membranes. The architectures combines the efficiency of crystalline silicon solar cell, with the great absorption of porous silicon, and with a more efficient way to use the material. The new process faces the main challenge to achieve an effective and not expensive passivation of the porous silicon surface, in order to achieve an efficient photovoltaic device. At the same time the process suggests a smart way to selective doping of the macroporous silicon layers despite the through-going pores. © 2015 IEEE.
SciVal Topic Prominence
Topic: Porous silicon | Silicon | macroporous silicon
Prominence percentile: 66.984
Author keywords
nanofabricationporous siliconsilicon nanoelectronicssolar cells
Indexed keywords
Engineering controlled terms:
Crystalline materialsNanoelectronicsNanostructured materialsNanotechnologyPorous siliconSiliconSilicon wafersSolar cells
Engineering uncontrolled terms
Crystalline silicon solar cellsCrystalline solar cellsMacro porous siliconPhotovoltaic devicesPorous silicon surfacesPorous silicon technologySilicon nanoelectronicsUltrathin silicon membrane
Engineering main heading:
Silicon solar cells
ISBN: 978-146738155-0
Source Type: Conference Proceeding
Original language: English
DOI: 10.1109/NANO.2015.7388710
Document Type: Conference Paper
Sponsors: Nanotechnology Council
Publisher: Institute of Electrical and Electronics Engineers Inc.
References (9)
View in search results format ▻
All
Export Print E-mail Save to PDF Create bibliography
1
(2012) International Technology Roadmap for Photovoltaics Results 2012. Cited 24 times.
ITRPV, Third Edition, Berlin 2012
www.ITRPV.net
2
Lehmann, V., Honlein, W., Stengl, R., Willer, J., Wendt, H.
(1992) Verfahren Zur Herstellung Einer Solarzelle Aus Einer Substratscheibe. Cited 6 times.
German patent DE4204455C1; Filing date: 29. 01.
3
Brendel, R., Ernst, M.
Macroporous Si as an absorber for thin-film solar cells
(2010) Physica Status Solidi - Rapid Research Letters, 4 (1-2), pp. 40-42. Cited 22 times.
http://www3.interscience.wiley.com/cgi-bin/fulltext/123215552/PDFSTART
doi: 10.1002/pssr.200903372
Locate full-text(opens in a new window)
View at Publisher
4
Ernst, M., Brendel, R., Ferré, R., Harder, N.-P.
Thin macroporous silicon heterojunction solar cells
(2012) Physica Status Solidi - Rapid Research Letters, 6 (5), pp. 187-189. Cited 16 times.
doi: 10.1002/pssr.201206113
Locate full-text(opens in a new window)
View at Publisher
5
Ernst, M., Brendel, R.
Macroporous silicon solar cells with an epitaxial emitter
(2013) IEEE Journal of Photovoltaics, 3 (2), art. no. 6472253, pp. 723-729. Cited 7 times.
doi: 10.1109/JPHOTOV.2013.2247094
Locate full-text(opens in a new window)
View at Publisher
6
Ernst, M., Schulte-Huxel, H., Niepelt, R., Kajari-Schröder, S., Brendel, R.
Thin crystalline macroporous silicon solar cells with ion implanted emitter (Open Access)
(2013) Energy Procedia, 38, pp. 910-918. Cited 2 times.
http://www.sciencedirect.com/science/journal/18766102
doi: 10.1016/j.egypro.2013.07.364
Locate full-text(opens in a new window)
View at Publisher
7
Nenzi, P., Kholostov, K., Crescenzi, R., Bondarenka, H., Bondarenko, V., Balucani, M.
Electrochemically etched TSV for porous silicon interposer technologies
(2013) Proceedings - Electronic Components and Technology Conference, art. no. 6575887, pp. 2201-2207. Cited 2 times.
ISBN: 978-147990233-0
doi: 10.1109/ECTC.2013.6575887
Locate full-text(opens in a new window)
View at Publisher
8
Perticaroli, S., Varlamava, V., Palma, F.
Microwave sensing of nanostructured semiconductor surfaces
(2014) Applied Physics Letters, 104 (1), art. no. 013110. Cited 3 times.
doi: 10.1063/1.4861424
Locate full-text(opens in a new window)
View at Publisher
9
De Cesare, G., Caputo, D., Tucci, M.
Electrical properties of ITO/crystalline-silicon contact at different deposition temperatures
(2012) IEEE Electron Device Letters, 33 (3), art. no. 6142006, pp. 327-329. Cited 28 times.
doi: 10.1109/LED.2011.2180356
Locate full-text(opens in a new window)
View at Publisher
© Copyright 2017 Elsevier B.V., All rights reserved.
◅ Back to results
◅ Previous
3of10
Next ▻
Top of page
Metrics
Learn more about article metrics in Scopus (opens in a new window)
0
Citations in Scopus
0
Learn more about Field-Weighted Citation Impact
Field-Weighted Citation Impact
PlumX Metrics
Usage, Captures, Mentions, Social Media and Citations beyond Scopus.
Cited by 0 documents
Inform me when this document is cited in Scopus:
Set citation alert ▻
Set citation feed ▻
Related documents
Thin crystalline macroporous silicon solar cells with ion implanted emitter
Ernst, M. , Schulte-Huxel, H. , Niepelt, R.
(2013) Energy Procedia
Multilayer etching for kerf-free solar cells from macroporous silicon
Schäfer, S. , Ernst, M. , Kajari-Schröder, S.
(2013) Energy Procedia
Macroporous silicon solar cells with an epitaxial emitter
Ernst, M. , Brendel, R.
(2013) IEEE Journal of Photovoltaics
View all related documents based on references
Find more related documents in Scopus based on:
Authors ▻
Keywords ▻
About Scopus
What is Scopus
Content coverage
Scopus blog
Scopus API
Privacy matters
Language
日本語に切り替える
切换到简体中文
切換到繁體中文
Русский язык
Customer Service
Help
Contact us
Elsevier
Terms and conditions ↗
Privacy policy ↗
Copyright © 2018 Elsevier B.V ↗. All rights reserved. Scopus® is a registered trademark of Elsevier B.V.
We use cookies to help provide and enhance our service and tailor content. By continuing, you agree to the use of cookies.
RELX Group
We developed a new process for the fabrication of crystalline solar cell, based on an ultrathin silicon membrane, taking advantage of porous silicon technology. The suggested architecture allows the costs reduction of silicon based solar cell reusing the same wafer to produce a great number of membranes. The architectures combines the efficiency of crystalline silicon solar cell, with the great absorption of porous silicon, and with a more efficient way to use the material. The new process faces the main challenge to achieve an effective and not expensive passivation of the porous silicon surface, in order to achieve an efficient photovoltaic device. At the same time the process suggests a smart way to selective doping of the macroporous silicon layers despite the through-going pores
Propuesta de marketing digital para posicionar la marca Izzi en las redes sociales a través de Facebook
No full textTesis (Maestría en Ciencias en Administración de Negocios), Instituto Politécnico Nacional, SEPI, ESCA, Unidad Santo Tomás, 2016, 1 archivo PDF, (147 páginas). tesis.ipn.m
جماليات التلقي في قصة قصيرة "دولة العصافير"لتوفيق الحكيم بدراسة ولفغانغ أيزر
No full textمستخلص البحث
العزّ,إثني نساء ( 2022)، "جماليات التلقي في قصة قصيرة "دولة العصافير" لتوفيق الحكيم بدراسة ولفغانغ أيزر"(Wolfgang Iser). البحث الجامعي، قسم اللغة العربية وأدبها، كلية العلوم الإنسانية جامعة مولانا مالك إبراهيم الإسلامية الحكومية بمالانج.
الأدب عمل فني في شكل كتابة ذات قيمة جمالية. يمكن رؤية القيمة الجمالية للأدب من كيفية تكامل اللغة والكلمات مع بعضها البعض وإنتاج أعمال جميلة للاستمتاع بها وسماعها وشعورها. الأدب (العمل الأدبي) هو عمل فني يستخدم اللغة كوسيط. اللغة الأدبية هي لغة تحتوي على الأفعال أو إطلاق عالم الخيال، حتى يسممنا دون أن ندرك ذلك. تستخدم الباحثة مفهوم القارئ الضمني. يحتوي القارئ الضمني على جانبين هما دور القارئ في بنية النص ودور القارئ في بناء القصة القصيرة لأرض الطيور لتوفيق الحكيم. البحث في الدراسات الأدبية، تحظى نظرية استقبال إيسر الجمالية بمكانة واسعة إلى حد ما. افتراض الأدب هو أن للمجموعة قطبين، يطلق عليهما القطب الفني (المؤلف) والقطب الجمالي (القارئ). تحدث عملية القراءة في التفاعل بين النص والقارئ. تعتبر سيكولوجية القارئ ووظيفة بنية اللغة من الأشياء المهمة التي تؤثر على عملية القراءة للقارئ.
بعد البحث الجيد والتفصيل، وجدت الباحثة إجابات أسئلة البحث فيما يتعلق بقبول القارئ للعناصر الجوهرية في الرواية. ويأتي هذا القبول على شكل إيمان بوجود جشع من البشر كما جاء في رواية توفيق الحكيم. ثم تختلف استجابة القارئ للقصة القصيرة لأرض الطيور، اعتمادًا على المستلمين من عدة دوائر، يفهم الباحثون أنفسهم المعنى الذي يريد المؤلف نقله حتى يتم نقل القيم في القصة القصيرة. القصة القصيرة لأرض الطيور هي قصة قصيرة تحتوي على العديد من قيم الرسائل التي يرغب المؤلف في نقلها إلى القارئ. وجد الباحثون العديد من القيم الواردة في الرواية بما في ذلك الدافع لأن نكون متفائلين دائمًا، وذكاء العقل والروح، والدافع للشعور دائمًا بالرضا، وحب الآخرين بإخلاص، وحب الله والتفكير في وجوده.
ABSTRACT
Literature is a work of art in the form of writing that has aesthetic value. The aesthetic value of literature can be seen from how language and words complement each other and produce beautiful works to be enjoyed, heard and felt. Literature (literary work) is a work of art that uses language as its medium. Literary language is a language that contains the meaning of verbs. Literary language is a special language that results from its composition and writing. Literature likes to offer beauty, give meaning to life (death, misery, or joy) or release the world of imagination, so that it can poison us without us knowing it. The researcher uses the concept of implied reader. Implied reader contains two aspects, namely the role of the reader in the structure of the text and the role of the reader in structuring the short story of the land of birds by Taufik Al-Hakim. Research In literary studies, Iser's reception aesthetic theory has a fairly wide place. The assumption of literature is that a corpus has two poles, which are called the artistic (author) and aesthetic (reader) poles. The reading process occurs in the interaction between the text and the reader. The psychology of the reader and the function of the structure of language are important things that influence the reading process of a reader.
After researching well and in detail the researchers found answers to the formulation of the problem regarding the reader's acceptance of the intrinsic elements in the novel. This acceptance is in the form of believing in the existence of human greed which is stated in the novel by Taufik Al-Hakim.
Then the reader's response to the short story of the land of birds varies, depending on the recipients from several circles, the researchers themselves understand the meaning that the author wants to convey so that the values in the short story are conveyed. The short story of the land of birds is a short story that has several message values that the author wants to convey to the reader. Researchers found several values contained in the novel including the motivation to always be optimistic, intelligence of mind and soul, motivation to always feel enough.
ABSTRAK
Sastra merupakan suatu karya seni berupa tulisan yang memiliki nilai estetika. Nilai estetika sastra dapat dilihat dari bagaimana bahasa dan kata saling melengkapi dan menghasilkan karya yang indah untuk dinikmati, didengar dan dirasakan. Sastra (karya sastra) merupakan karya seni yang menggunakan bahasa sebagai medianya. Konon bahasa ini adalah karya seni. Beberapa pekerjaan sastra termasuk hiburan.
Sastra senang menawarkan keindahan, memberi makna pada kehidupan (kematian, kesengsaraan, atau kegembiraan) atau melepaskan dunia imajinasi, sehingga bisa meracuni tanpa kita sadari.Peneliti menggunakan konsep implied reader, pembaca tersirat. Implied reader mengandung dua aspek, yaitu peranan pembaca dalam struktur teks dan peranan pembaca dalam tindakan menstrukturasikan terhadap cerpen negeri burung karya Taufik Al-Hakim. Penelitian Dalam kajian sastra, teori estetika resepsi Iser mendapatkan tempat yang cukup luas. Asumsi sastra adalah sebuah korpus yang memiliki dua kutub yang disebut dengan kutub artistik (pengarang) dan estetik (pembaca). Proses pembacaan itu terjadi dalam interaksi antara teks dan pembaca. Psikologi pembaca dan fungsi struktur bahasa adalah hal penting yang berpengaruh dalam proses membaca dari seorang pembaca.
peneliti menemukan jawaban akan rumusan masalah mengenai penerimaan pembaca terhadap unsur-unsur intrinsik dalam novel. penerimaan tersebut berupa percaya akan adanya rasa ketamakan dari manusia yang tertera dalam novel karya Taufik Al-Hakim. kemudian respon pembaca terhadap cerpen negeri burung bermacam-macam, tergantung kepada penerima dari beberapa kalangan, peneliti sendiri faham terhadap makna yang ingin disampaikan oleh pengarang sehingga nilai-nilai yang ada di dalam cerpen tersampaikan. cerpen negeri burung merupakan cerpen yaang memiliki beberapa nilai pesan yang ingin disampaikan oleh pengarang kepada pembaca. peneliti menemukan beberapa nilai yang terkandung di dalam novel diantaranya adalah motivasi untuk selalu optimis, kecerdasan akal dan jiwa, motivasi untuk selalu merasa cukup
Popular knowledge in health and its doctor – patient relationship in gynecology and obstetrics
No full textEl médico actual enfrenta una serie de creencias populares relacionadas con la salud y la enfermedad que el paciente trae como parte de su bagaje cultural, por lo cual debe estar atento a que dichas creencias y sus propias creencias no afecten la relación médico-paciente, la cual tiene gran peso en los resultados del ejercicio médico y representa uno de los muchos retos que enfrenta el médico del siglo XXI. Se enfatiza en la relación médico-paciente como parte importante del ejercicio médico, así como la relevancia de la estructura de las prácticas médicas, según la perspectiva del autor fundante del acto intelectivo. Se planteó como propósito realizar una revisión de las reflexiones autorales que muestran una gran preocupación por la formación del médico como especialista en ginecología y obstetricia, centrada en las nuevas expectativas y desafíos que son confrontados hoy día. La investigación ha sido de carácter documental. La metodología es contrastar la opinión de los autores citados. A partir de esa reflexión se ha concluido que: el médico clínico no puede ser formado como un científico puro, y sólo en el terreno clínico, puesto que, la relación médico-paciente se debe fortalecer con la educación profesional médica, por ello, no puede limitarse a capacitar a los futuros especialistas en cuanto a la adquisición de conocimientos científicos, sino que, de manera obligatoria, debe extenderse tanto a los valores así como a las actitudes humanísticas que cualquier médico debe tener como profesional sobre la práctica y el saber médico.Recibido: 26/06/2023 Aceptado: 08/08/2023The current doctor faces a series of popular beliefs related to health and disease that the patient brings as part of his cultural baggage, for which he must be careful that said beliefs and his own beliefs do not affect the doctor-patient relationship, the which has great weight in the results of medical practice and represents one of the many challenges facing the physician of the 21st century. Emphasis is placed on the doctor-patient relationship as an important part of medical practice, as well as the relevance of the structure of medical practices, according to the perspective of the founding author of the intellective act. The purpose was to carry out a review of the authorial reflections that show a great concern for the training of the future doctor as a specialist in gynecology and obstetrics, focused on the new expectations and challenges that are faced today. The investigation has been of a documentary nature. The methodology is to contrast the opinion of the cited authors. Based on this reflection, it has been concluded that: the clinical physician cannot be trained as a pure scientist, since clinical work must be based equally on science and art, and it is here where the relationship doctor-patient is part of this art, which strengthens professional medical education, especially in the clinical field, which cannot be limited to training future specialists in the acquisition of scientific knowledge, but must, in a mandatory manner, , extend to the humanistic values and attitudes that any doctor should have as a professional regarding medical practice and knowledge
- …
