gebhart/patrepeval huggingface dataset:
A new methodology for parameter estimation of synchronous generator from disturbance measurements (2008)

A new framework to estimate dynamic parameters of synchronous generator is proposed in this paper. The methodology does not require special tests but uses disturbance data collected from the system without disconnecting the generator from the grid. It requires measurements that are easily available, more precisely, the 3-phi currents and voltages, the field voltage and the mechanical rotor speed. The estimation of mechanical and electrical parameters are decoupled offering more robustness to the estimation algorithm. In order to achieve robustness with respect to the initial parameter guesses, the DAEpsilas (Differential-Algebraic Equations) which model the generator are replaced by a constrained minimization problem that overcomes singular problems of the algebraic equations. Finally, the rotor angle is not measured but calculated as a byproduct of the proposed methodology.
Delay tolerant network for autonomous robotic vehicle charging and hazard detection (2014)

Autonomous robotic vehicles are getting increasingly popular. Uses for these vehicles include operations in remote areas where access to a structured network such as 3G, 4G, 5G, or Wi-Fi may be unavailable, making reliable communication an issue. Limited battery power of these vehicles is another issue that impairs their ability to perform autonomous duties for extended time periods. We propose a new delay-tolerant-network (DTN) topology that allows the vehicles seamlessly communicate with each other and additional nodes, and a novel autonomous charging system utilizing our network to solve the problem of limited battery power for extended autonomous duties. We designed a cost-effective, heterogeneous, ad-hoc DTN to carry and relay information between robotic vehicles, charging stations and additional nodes, where nodes can collect and store data from each other to relay to additional nodes. Furthermore, we developed an automated charging process, where autonomous robotic vehicles collect, share, and store information about the charging stations they have encountered using our DTN network. When the vehicles need charging, they use the data stored in their memory to autonomously navigate to the charging stations and connect with them using image detection to charge their batteries, eliminating any need for outside intervention. To demonstrate the autonomous charging process, we prototyped two autonomous robotic vehicles controlled by smartphones. These smartphones run a custom Android application we developed to perform wireless communication over DTN using the ZigBee protocol. The vehicles navigate autonomously using GPS and on board ultrasonic distance sensors, and precisely connect to charging stations by using the smartphone camera to detect specific patterns. Additionally, we built a prototype charging station that also acts as a gateway between our DTN and the Internet.
Stacked Fresnel Zone Plates for High Energy X-rays (2007)

A stacking technique was developed in order to increase focusing efficiency of Fresnel zone plates (FZP) at high energies. Two identical Si chips each of which containing 9 FZPs were used for stacking. Alignment of the chips was achieved by on‐line observation of the moiré pattern. The formation of moiré patterns was studied theoretically and experimentally at different experimental conditions. To provide the desired stability Si‐chips were bonded together with slow solidification speed epoxy glue. A technique of angular alignment in order to compensate a linear displacement in the process of gluing was proposed. Two sets of stacked FZPs were experimentally tested to focus 15 and 50 keV x rays. The gain in the efficiency by factor 2.5 was demonstrated at 15 keV. The focal spot of 1.8 μm vertically and 14 μm horizontally with 35% efficiency was measured at 50 keV. Forecast for the stacking of nanofocusing FZPs was discussed.
Efficacy and safety of anti-PD-1/PD-L1 agents vs chemotherapy in patients with gastric or gastroesophageal junction cancer: a systematic review and meta-analysis (2019)

PD-1/PD-L1 inhibitors appear to improve the antitumor activity in advanced gastric or gastroesophageal junction cancer patients. However, single-agent PD-1/PD-L1 inhibitor did not result in a relative improvement in OS and PFS compared with chemotherapy in the treatment of patients with advanced gastric or gastroesophageal junction cancer. Further randomized clinical trials are warranted to confirm our findings.
질문의 경로를 바꿔라 - 시대 변화와 인문학적 사유 - (2011)

The oldest one is the newest. Just as every new one appears, it`s already old. It is the substance of humanities craze these days to find out new meaning with excitement. Are humanities really an alternative? Is it a new hope? As far as the cycle of humane destiny doesn`t change, every human life is same in the beginning, the Middle Ages, modern times, or even today. The speed doesn`t make difference between Joseon period`s letter delivered by people through days and super high speed optical LAN e-mail. As it speeds up millions times, they think the speed of life and culture is improved. It`s a tragic misunderstanding. If it speeds up, thought is gone. It`s useless to be too excited at sudden craze of humanities. Although it can be better than failure, the rosy future that the craze will expand to employment and social activity is not to be expected. The call for humanities has increased explosively, but people don`t know what they want about humanities. Therefore humanities are always in a crisis. There isn`t new one under the sun. All the new ones we devised are just a variation of worn-out old one. The culture has power when it confirms universality not spreads particularity. It is the time when we should believe that the most Korean thing has global power. The harder I make a sound, the easier others can hear. One should have their own color and voice, when studying.
Freezing Nucleation Rates of Dilute Solution Droplets Measured between −30° and −40°C in Laboratory Simulations of Natural Clouds (1990)

A 1.2 m3 continuous slow-expansion cloud chamber was used to simulate natural, liquid cloud formation on soluble cloud condensation nuclei (CCN). Droplet freezing was observed during continued simulated adiabatic ascent and cooling to −40°C. Sharply increasing ice nucleation rates were observed between −34° and −39°C, independent of the chemical composition of three CCN used. From the experimental data, nucleation rates are estimated assuming a homogeneous-freezing mechanism. It is concluded that homogeneous-freezing was observed. The results are compared to other laboratory and field studies. These results compare most closely with values calculated from data taken in real clouds and should be relevant to ice formation in cirrus clouds.
Review: <i>The Protectors</i>, by Harry Edward Neal (1969)

Book Review| October 01 1969 Review: The Protectors, by Harry Edward Neal The ProtectorsHarry Edward Neal H. G. H. G. Search for other works by this author on: This Site PubMed Google Scholar The American Biology Teacher (1969) 31 (7): 463. https://doi.org/10.2307/4442760 Views Icon Views Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Cite Icon Cite Search Site Citation H. G.; Review: The Protectors, by Harry Edward Neal. The American Biology Teacher 1 October 1969; 31 (7): 463. doi: https://doi.org/10.2307/4442760 Download citation file: Ris (Zotero) Reference Manager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentThe American Biology Teacher Search This content is only available via PDF. Copyright 1969 The National Association of Biology Teachers Article PDF first page preview Close Modal You do not currently have access to this content.
Asian ginseng extract inhibits in vitro and in vivo growth of mouse lewis lung carcinoma via modulation of ERK‐p53 and NF‐κB signaling (2010)

Asian ginseng (AG) is the most commonly used medicinal herb in Asian countries. It is often prescribed for cancer patients as a complementary remedy. However, whether AG in fact benefits cancer patients remains unknown because some studies reported that AG facilitates tumor growth, which contradicts its usage as a dietary remedy to cancer patients. In addition, most of research works on ginseng for anti-cancer were using single ginsenoside rather than whole root extracts used in clinics. Thus, intensive studies using the type of ginseng as its clinical form are necessary to validate its benefits to cancer patients. In this study, anti-tumor potency and underlying molecular mechanisms of the ethanol extract of AG (EAG) were examined in mice with Lewis lung carcinoma (LLC-1). We showed that EAG significantly suppressed tumor growth in LLC-1-bearing mice with concomitant down-regulation of PCNA proliferative marker, and it exhibited specific cytotoxicity to cancer cells. EAG also induced MAPK and p53 signaling in LLC-1 cells, which suppressed cyclin B-cdc2 complex and in turn induced G2-M arrest and apoptosis. Although EAG could activate NF-κB signaling, the proteasome inhibitor of MG-132 could effectively prevent NF-κB targeted gene expression induced by EAG and then sensitize LLC-1 cells to induce EAG-mediated apoptosis. Collectively, EAG in a relatively high dose significantly suppressed tumor growth in LLC-1-bearing mice, indicating that AG may benefit lung cancer patients as a dietary supplement. This is the first report demonstrating possible combination of EAG with proteasome inhibitors could be a novel strategy in anti-cancer treatment.
Flag and Register Array Based High Performance Instruction Set Architecture of Embedded Processor (2013)

Here, assumption is that if we add 8 numbers from register array then it takes 120ns when execution time is 5ns and register access time is 10ns. If we add same 8 number using one by one fetching from memory then it takes 840ns to add 8 numbers. In that way we are saving 720ns ,i.e., 85.7% time saving in execution of add instruction to add 8 numbers. In this way, our Instruction Set based on Flag and Register Array provides high performance. And in this paper comparison of this instruction set with existing instruction set of advanced processor architecture like PIC16FXX, AVR ATMEGA8, 8051.
Overview of a flywheel stack energy storage system (1988)

The concept of storing electrical energy in rotating flywheels provides an attractive substitute to batteries. To realize these advantages the critical technologies of rotor design, composite materials, magnetic suspension, and high efficiency motor/generators are reviewed in this paper. The magnetically suspended flywheel energy storage system, currently under development at the University of Maryland, consisting of a family of interference assembled rings, is presented as an integrated solution for energy storage.
High-resolution X-ray source with advanced e-beam technology: pushing the resolution limitation for lab-scale NanoCT (2021)

An abstract is not available for this content so a preview has been provided. As you have access to this content, a full PDF is available via the ‘Save PDF’ action button.
Theoretical Framework Of A Computational Model Of Auditory Memory For Music Emotion Recognition. (2014)

[TODO] Add abstract here.
Enhanced light output power of quantum cascade lasers from a tilted front facet (2013)

We present a technique for enhancing the light output power of quantum cascade lasers (QCLs) by tilting of the front facet, which leads to a change of the modal reflectivity, resulting in an asymmetric light intensity distribution along the laser cavity. This asymmetry provides most of the light being emitted through one facet of the laser. An experimental study of threshold current, slope efficiency and light output power as a function of the front facet angles were performed and compared to conventional QCLs. The lasers with a front facet angle of 8° shows a 20% improved power output from the front facet.
Pyrimidines. <b>24</b>. Analogues and derivatives of 2‐amino‐5‐bromo‐6‐phenyl‐4(3<i>H</i>)‐pyrimidinone (ABPP) (1993)

Abstract Preparation of a number of derivatives of 2‐amino‐5‐bromo‐6‐phenyl‐4(3 H )‐pyrimidinone (ABPP) including the 2‐dialkylaminoalkylamino‐, 2‐hydroxyalkylamino‐, 2‐ethoxycarbonylamino‐ and 2‐alkylaminocarbonyl‐amino‐ groups substituted on the pyrimidine ring as well as preparation of 1‐(alkylaminoalkyl)‐4,6‐dioxo‐8‐phenyl‐2,3,4,6‐tetrahydro‐1 H ‐pyrimido[1,2‐α]pyrimidines and 3,5‐dioxo‐7‐phenyl‐1,2,3,5‐tetrahydroimidazo‐[1,2‐α]pyrimidines with or without the bromo‐substitution are reported.
Effect of Solvents Treatment on Microstructure and Dispersion Properties of Palygorskite (2013)

Palygorskite was dispersed by various organic solvents and water, and the effects of solvent types on its microstructure, dispersion degree, and colloidal properties were investigated by infrared spectroscopy (IR), x-ray diffraction (XRD), and nitrogen adsorption-desorption isotherm (BET), field emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), and rheological analyses. It was found that dimethyl sulfoxide and dimethyl formamide molecules may attach onto the surface of palygorskite and cause a complete disappearance of micropores. Solvent parameters govern the dispersion degree of palygorskite, and dimethyl sulfoxide and dimethyl formamide are good solvents to disperse palygorskite aggregates in contrast to ethanol and isopropanol. Colloidal stability and rheological tests suggested dimethyl sulfoxide-dispersed palygorskite can form more stable suspension with higher shear stress and modulus, but isopropanol-dispersed palygorskite may rapidly subside in suspension and show poor colloidal properties.
Imaging of material defects with a radio-frequency atomic magnetometer (2019)

Non-destructive inductive testing of defects in metal plates using the magnetic resonance signal of a radio-frequency atomic magnetometer is demonstrated. The shape and amplitude of the spatial profile of the signal features, which represent structural defects, are explored. By comparing numerical and experimental results on a series of benchmark aluminium plates, we show correspondence between the properties of the secondary field and those of the magnetometer signal. In particular, we show that two components of the secondary field are mapped onto the amplitude and phase of the atomic magnetometer signal. Hence, a magnetic field measurement with the atomic magnetometer, although scalar in its nature, provides semi-vectorial information on the secondary field. Moreover, we demonstrate a robust process for determining defect dimensions, which is not limited by the size of the sensor. We prove that the amplitude and phase contrast of the observed profiles enables us to reliably measure defect depth.
Heat effects on the repair of DNA double-strand breaks in CHO cells (1997)

The effect of heat (43-45 degrees C) on the induction and the repair of DNA double-strand breaks (dsb) was studied in CHO cells after 60 Gy of X-rays using constant-field gel electrophoresis. Heat given prior to irradiation was found not to alter the number of dsb when measured immediately after irradiation. In non-heated cells, about 80% of all dsb were rapidly repaired with a half-time of 4 min, while 20% were repaired more slowly with T4 = 160 min. These kinetics were grossly altered by heat. Both the fast and the slow process were retarded. However, the main effect of heat was an increase in the number of slowly rejoined dsb. This increase was shown to result from the additional formation (up to 1.4-fold the initial number) of dsb early during the repair course. It is suggested that the additional dsb arose from base damage, the repair of which was unbalanced by heat. No evidence was found for apoptosis being involved in this process. The kinetics of the additional dsb was found to correlate with thermal radiosensitization.
A Multiple Scales Approach to the Stability and Control of a Hypersonic Re-entry Glider (1987)

Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1988.
Consideration of Three Types of Spontaneous Eyeblink Activity in Normal Humans: during Reading and Video Display Terminal Use, in Primary Gaze, and while in Conversation (2001)

It is inappropriate to simply state a value for spontaneous eyeblink rate because it is so dependent on experimental conditions. It is further proposed that reports of SEBR measures should be prefixed by these experimental conditions, namely reading-SEBR, primary gaze-SEBR (in silence) and conversational-SEBR.
Gabay sa Kadiliman (2011)

Itinaas ni Susan ang porselana. Nang kanyang pagpagin ang ilalim, laking gulat niya nang isang butiki ay kumaripas ng takbo palayo sa kanya. Napasigaw siya sa gulat at kamuntikang mahulog mula sa kanyang kamay ang porselana. Bwisit na butiking iyon. Buti na lang hindi ito nabasag, bulong niya sa sarili. Muli niyang pinagpagan ang porselana at ibinalik sa kinalalagyan.
A Method for Combined Jet and Mechanical Drilling (1990)

ABSTRACT A method has been developed for jet assisted mechanical drilling with fluid pressures of up to 34,000 PSI. This paper will present the most recent drilling results of an ultra-high pressure drilling system that integrates with existing drilling equipment, to provide two (2) fluid steams to the drill bit, one of which is highly pressurized. High rates of penetration over conventional drilling rates have been observed from field drilling results. Based on the most current field drilling projects, this paper will present details concerning the method for combined jet and mechanical drilling as well as actual field drilling results.
The Future of Three-Dimensional Imaging and Museum Applications (2011)

Abstract Is it time for all museums to initiate large-scale 3D digitization programs? We don’t yet know how 3D is going to change, replace, or integrate into current museum experience. Yet the possibilities are being actualized right now. What does 3D mean for museums? Digitizing museum objects in 3D (or the museums themselves, for that matter) with incredible accuracy and realism; examining the inside of a mummy; modeling collections in 3D; retaining virtual copies of vulnerable objects; all these and more already exist in the fast-changing realm of 3D applications.
Carcinoma of the Prostate: Analysis of 200 Cases (1959)

No AccessJournal of Urology1 Jan 1959Carcinoma of the Prostate: Analysis of 200 Cases William J. Baker William J. BakerWilliam J. Baker More articles by this author View All Author Informationhttps://doi.org/10.1016/S0022-5347(17)65989-5AboutPDF ToolsAdd to favoritesDownload CitationsTrack CitationsPermissionsReprints ShareFacebookLinked InTwitterEmail © 1959 by The American Urological Association Education and Research, Inc.FiguresReferencesRelatedDetails Volume 81Issue 1January 1959Page: 197-202 Advertisement Copyright & Permissions© 1959 by The American Urological Association Education and Research, Inc.MetricsAuthor Information William J. Baker More articles by this author Expand All Advertisement PDF DownloadLoading ...
Metal Alkoxides (1959)

The metal alkoxides constitute an important class of compounds characterized by the metal-oxygen-carbon bonding system. The strongly electronegative oxygen atom induces considerable polarity in the δ+δ-M-O bond, but this may be partially offset by the electrophilic nature of metals that undergo covalency expansion by coordination with donor atoms. The properties of the M-O-C system are also affected by the electronic behavior of the alkyl group. Its configuration gives rise to important stereochemical effects. The metal alkoxides offer great scope for producing compounds with varied chemical and physical properties. It is surprising that only the alkoxides of magnesium and aluminum were of industrial importance until a few years ago.
Self-frequency-doubled vibronic yellow Yb:YCOB laser at the wavelength of 570  nm (2016)

A watt-level self-frequency-doubled yellow laser at the 570 nm wavelength was realized by taking advantage of the vibronic emission of a Yb3+ doped calcium yttrium oxoborate (Yb:YCOB) crystal cut along the optimized direction out of the principal planes with the maximum effective nonlinear coefficient. Fluorescence spectroscopic properties of Yb:YCOB were studied, which showed that it had broad and anisotropic vibronic emission with a small peak at ∼1130 nm. By suppressing the electronic emission, the polarized vibronic Yb:YCOB radiation was realized with the fundamental wavelength shifting from 1130 nm to 1140 nm. By employing the self-frequency-doubling behavior of Yb:YCOB, the self-frequency-doubled yellow laser was achieved with a maximum output power of 1.08 W at 570 nm. This work provides an unprecedented and efficient way to generate yellow lasers with a compact microchip structure that may have promising applications in some regimes including medicine, entertainment, and scientific research.
El docente inmigrante “irregular” en Ecuador: reto del derecho a la educación (2017)

La presencia de docentes extranjeros en las instituciones educativas ecuatorianos forma parte de su actualidad. Personas que han abandonado sus países de origen por circunstancias como conflictos sociales, económicos, o laborales. Inmigrantes que vienen a ejercer entre las distintas profesiones la docencia, siendo partícipes de la elaboración de un ambicioso proyecto político y social que es el sumak Kawsay, y que tiene como eje fundamental el reconocimiento de la persona y sus categorías personales. Así su dignidad es la base elemental de la educación intercultural como propuesta de relación con el entorno, tanto nacional como supranacional. Este trabajo tiene por objeto fomentar el debate sobre la relevancia de promover una cultura política educativa que permita cuestionar y coadyuvar al desarrollo de esta utopía latinoamericana que supone el buen vivir por cuanto alternativa de refiere. De este modo, a través de la hermenéutica normativa se parte de la investigación de la realidad educativa constitucional para situar la contradicción política y jurídica que supone la incursión por vía reglamentaria del artículo 33.2 del Reglamento a la Ley de Extranjería del Ecuador, la discriminación del docente inmigrante y el lastre para la educación intercultural que supone el revestimiento jurídico del ego nacionalista. Palabras clave : Legislación educativa. Política educativa. Programas interculturales. Educación migrante. Educación inclusiva. Illegal immigrant teachers in Ecuador: the challenge of right to education Abstract The presence of foreign teachers in the Ecuadorian educational institutions is part of this country current moment. People who have left their birthplaces by different circumstances, for example social, economic, security or labor conflicts. Immigrants who come to work in teaching among different professions, and who are also participants in the development of an ambitious political and social project called sumak Kawsay; which has as its main idea the recognition of the person and his or her personal categories. In this sense, the dignity of the person is the elemental basis of intercultural education as a proposal of relationship with the surrounding context, both national and supranational. The purpose of this work is to encourage the debate about the importance of promoting an educational policy culture that allows the questioning and contribution to the development of Latin American utopia that assumes “el buen vivir” as an alternative. Thus, through the hermeneutic rules, the investigation starts with the constitutional educational reality to place political and legal contradiction that supposes the incursion by regulation of Article 33.2 of Regulations to the Immigration Law of Ecuador, the discrimination of the immigrant teacher and the obstacle for intercultural education that presumes a legal lining of nationalist ego. Keywords: Educational Legislation . Educational Policy . Intercultural Programs . Migrant Education . Inclusive Education .