gebhart/patrepeval huggingface dataset:
Phototransistors based on InP HEMTs and their applications to millimeter-wave radio-on-fiber systems (2005)

Phototransistors based on InP high electron-mobility transistors (HEMTs) are investigated for millimeter-wave radio-on-fiber system applications. By clarifying the photodetection mechanism in InP HEMTs, the phototransistor internal gain is determined. We present their use as millimeter-wave harmonic optoelectronic mixers and characterize them at the 60-GHz band. In order to evaluate the InP HEMT optoelectronic mixer performance, internal conversion gain is introduced and a maximum of 17 dB is obtained for 60-GHz harmonic optoelectronic up-conversion. Utilizing them, we construct a 60-GHz radio-on-fiber system and demonstrate 622-Mb/s data transmission over 30-km single-mode fiber and 3-m free space at 60-GHz band.
CCDC 822376: Experimental Crystal Structure Determination (2011)

An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, cell parameters, space group, experimental conditions and quality measures.
Gene-Transferring Efficiencies of Novel Diamino Cationic Lipids with Varied Hydrocarbon Chains (2004)

Utilizing three biocompatible components, a series of novel cationic lipids has been chemically synthesized and tested for their gene-transferring capabilities in 293 transformed kidney cells and B16BL6 mouse melanoma cells. The synthesized cationic lipids consisting of a core of lysine and aspartic acid with hydrocarbon chains of varied length were assigned the acronyms DLKD (O,O'-dilauryl N-lysylaspartate), DMKD (O,O'-dimyristyl N-lysylaspartate), DPKD (O,O'-dipalmityl N-lysylaspartate), and DSKD (O,O'-distearyl N-lysylaspartate). The gene-transferring capabilities of these cationic lipids were found to be dependent on the hydrocarbon chain length. Under similar experimental conditions, the order of gene transfection efficiency was DMKD > DLKD > DPKD > DSKD. Addition of cholesterol or dioleoyl phosphatidylethanolamine (DOPE) as a colipid did not change this order. Colipid addition affected the transfection efficiency positively or negatively depending on the length of the cationic lipid acyl chain. On the whole, the length of the hydrophobic carbon chain was a major factor governing the gene-transferring capabilities of this series of cationic lipids. The observed differences in transfection efficiency may be due to differing binding affinities to DNA molecules as well as differences in the surface charge potential of the liposome-DNA complexes (lipoplexes) in the aqueous environment.
Electrically enhanced magnetization in highly strained BiFeO3 films (2016)

The control of magnetism via an electric field has attracted substantial attention because of potential applications in magnetoelectronics, spintronics and high-frequency devices. In this study, we demonstrate a new approach to enhance and control the magnetization of multiferroic thin film by an electric stimulus. First, to reduce the strength of the antiferromagnetic superexchange interaction in BiFeO3, we applied strain engineering to stabilize a highly strained phase. Second, the direction of the ferroelectric polarization was controlled by an electric field to enhance the Dzyaloshinskii–Moriya interaction in the highly strained BiFeO3 phase. Because of the magnetoelectric coupling in BiFeO3, a strong correlation between the modulated ferroelectricity and enhanced magnetization was observed. The tunability of this strong correlation by an electric field provides an intriguing route to control ferromagnetism in a single-phase multiferroic. A highly strained thin film that switches magnetic spins using electricity may advance low-power spintronic technology. Multiferroics are magnets that also have permanent electric polarization — a combination that can enable spins to be used in logic or memory devices if the electric and magnetic coupling forces are strong enough. Now, Ying-Hao Chu of National Chiao Tung University in Taiwan and co-workers have boosted the naturally weak magnetism of the multiferroic material bismuth ferrite (BiFeO3) by depositing it as a thin film on neodymium-based crystals. The significant epitaxial strain between the lattice-mismatched interfaces induced spontaneous magnetization, which could be enhanced by applying electric fields. Perfectly aligned nanoscale magnetic patterns were generated when a modest voltage was applied to the highly distorted BiFeO3 thin films via an atomic force microscope tip. Electrical control of the spin degree of freedom has enabled various vital applications in modern electronic devices, ranging from magnetoelectronics and spintronics to high-frequency devices. We demonstrate a new approach to ‘write’ enhanced magnetization in a single-phase multiferroic thin film by the application of an electric field. The induced magnetization can be controlled with nanoscopic precision via the assistance of scanning probe techniques, thus offering high potential for use in multifunctional, low power consumption and green nanoelectronics.
Proposition of isolation system applicable to the long-period earthquake ground motion (Method of changing natural frequency of isolation system with additional spring) (2019)

At present, there are many types of isolation system, and many of them are designed for the short-period ground motion. The long-period ground motion has recently attracted the attention, though the isolation system for the short-period ground motion does not have an ability to suppress the vibration due to the long-period ground motion because the frequency of the long-period ground motion is near the natural frequency of the isolation system. In this study, a new isolation system is proposed for not only the short-period ground motion but also the long-period one. The basic concept is that the dynamic property, which is the natural frequency, is changed by adding a spring when the amplitude of isolation table exceeds a threshold value. The validity of the method is checked by the numerical simulation using a single-degree-of-freedom system against the sine sweep ground motion and the actual earthquake ground motion. As a result, it is shown that the resonance can be suppressed by the proposed method. Then the applicability is checked by using the experimental setup. In the experiment, the additional spring is connected with the isolation table by using the clamping mechanism. The adequate clearance between the isolation table and the additional spring is determined in advance. As a result, the system can suppress the resonance phenomenon, so that it was concluded that the proposed system has a sufficient ability to suppress the resonance due to the long-period ground motion.
Atomic Layer Deposition of Hafnium Oxide on Silicon and Polymer Fibers at Temperatures below 100o C (2008)

Atomic layer deposition of hafnium oxide from tetrakis (diethylamino) hafnium (TDEAH) and water vapor was employed to create thin films on silicon with reactor temperatures as low as 30o C. Spectral ellipsometry and X-ray photoelectron spectroscopy were used to probe the thickness and composition of these films. Deposition at the same temperature of 30o C was carried out on poly-caprolactone (PCL) nanofibers as a template to examine the possibility of fabricating hafnium oxide nanotubes. Energy dispersive X-ray scans and scanning electron microscope images revealed significant hafnia coverage on the fibers, suggesting that hafnium oxide nanotubes can be formed by means of polymer vaporization after deposition.
Extensions to the ARMv7-A architecture (2010)

This article consists of a collection of slides from the author's conference presentation on ARM's v7-Architecture. Some of the specific topics discussed include: the special features, system specifications, and system design for these products; system architectures; applications for use; platforms supported; processing capabilities; memory capabilities; and targeted markets.
Mycoplasma stress response: adaptive regulation or broken brakes? (2014)

The avian bacterial pathogen Mycoplasma gallisepticum is a good model for transcriptional regulation studies due to its small genome and relative simplicity. In this study, we used RNA-Seq experiments combined with MS-based proteomics to accurately map coding sequences (CDSs), transcription start sites (TSSs) and transcription terminators (TTs) and to decipher their roles in stress-induced transcriptional responses. We identified 1061 TSSs at an FDR (false discovery rate) of 10% and showed that almost all transcription in M. gallisepticum is initiated from classic TATAAT promoters, which are surrounded by A/T-rich sequences and rarely accompanied by a -35 element. Our analysis revealed the pronounced complexity of the operon structure: on average, each coding operon has one internal TSS and TT in addition to the primary ones. Our new transcriptomic approach based on the intervals between the two closest transcription initiators and/or terminators allowed us to identify two classes of TTs: strong, unregulated and hairpin-containing TTs and weak, heat shock-regulated and hairpinless TTs. Comparing the gene expression levels under different conditions (such as heat, osmotic and peroxide stresses) revealed widespread and divergent transcription regulation in M. gallisepticum. Modeling suggested that the structure of the core promoter plays a major role in gene expression regulation. We have shown that the heat stress activation of cryptic promoters combined with the suppression of hairpinless TTs leads to widespread, seemingly non-functional transcription.
Inhibiting actin depolymerization enhances osteoblast differentiation and bone formation in human stromal stem cells (2015)

Remodeling of the actin cytoskeleton through actin dynamics is involved in a number of biological processes, but its role in human stromal (skeletal) stem cells (hMSCs) differentiation is poorly understood. In the present study, we demonstrated that stabilizing actin filaments by inhibiting gene expression of the two main actin depolymerizing factors (ADFs): Cofilin 1 (CFL1) and Destrin (DSTN) in hMSCs, enhanced cell viability and differentiation into osteoblastic cells (OB) in vitro, as well as heterotopic bone formation in vivo. Similarly, treating hMSC with Phalloidin, which is known to stabilize polymerized actin filaments, increased hMSCs viability and OB differentiation. Conversely, Cytocholasin D, an inhibitor of actin polymerization, reduced cell viability and inhibited OB differentiation of hMSC. At a molecular level, preventing Cofilin phosphorylation through inhibition of LIM domain kinase 1 (LIMK1) decreased cell viability and impaired OB differentiation of hMSCs. Moreover, depolymerizing actin reduced FAK, p38 and JNK activation during OB differentiation of hMSCs, while polymerizing actin enhanced these signaling pathways. Our results demonstrate that the actin dynamic reassembly and Cofilin phosphorylation loop is involved in the control of hMSC proliferation and osteoblasts differentiation.
Mcl-1 and FBW7 Control a Dominant Survival Pathway Underlying HDAC and Bcl-2 Inhibitor Synergy in Squamous Cell Carcinoma (2012)

Effective targeted therapeutics for squamous cell carcinoma (SCC) are lacking. Here, we uncover Mcl-1 as a dominant and tissue-specific survival factor in SCC, providing a roadmap for a new therapeutic approach. Treatment with the histone deacetylase (HDAC) inhibitor vorinostat regulates Bcl-2 family member expression to disable the Mcl-1 axis and thereby induce apoptosis in SCC cells. Although Mcl-1 dominance renders SCC cells resistant to the BH3-mimetic ABT-737, vorinostat primes them for sensitivity to ABT-737 by shuttling Bim from Mcl-1 to Bcl-2/Bcl-xl, resulting in dramatic synergy for this combination and sustained tumor regression in vivo. Moreover, somatic FBW7 mutation in SCC is associated with stabilized Mcl-1 and high Bim levels, resulting in a poor response to standard chemotherapy but a robust response to HDAC inhibitors and enhanced synergy with the combination vorinostat/ABT-737. Collectively, our findings provide a biochemical rationale and predictive markers for the application of this therapeutic combination in SCC.
SomatoShift: A Wearable Haptic Display for Somatomotor Reconfiguration via Modifying Acceleration of Body Movement (2023)

This paper proposes a wearable haptic device that utilizes control moment gyroscopes and a motion sensor to achieve somatomotor reconfiguration, altering the user’s somatic perception of their body. The device can manipulate sensations, making body parts feel heavier or lighter, and modify the ease of movement during interactions with objects. Given its potential applications in avatar technology, sports, and assistive technology, this proposed device represents a promising avenue for enriching the user’s bodily experiences.
“On Water” Direct and Site‐Selective Pd‐Catalysed CH Arylation of (NH)‐Indoles (2010)

Abstract This communication describes the development of a versatile catalytic system based on palladium(II) acetate/bis(diphenylphosphino)methane [Pd(OAc) 2 /dppm] that works “on water” giving site‐selective CH arylation of (NH)‐indoles without protecting or directing groups. Remarkably, the control of regioselectivity was achieved by small changes in the “extra‐catalytic” base/halide partners. These innovative methodologies allow a high‐yielding access to both C2 and C3‐arylindoles, as well as 2,3‐diarylindoles, and display high chemo/regioselectivities and structural versatility with regard to either indole or aryl moieties.
The origin of X-type Langmuir-Blodgett deposition of stearates (1990)

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThe origin of X-type Langmuir-Blodgett deposition of stearatesJ. B. PengCite this: Langmuir 1990, 6, 12, 1725–1728Publication Date (Print):December 1, 1990Publication History Published online1 May 2002Published inissue 1 December 1990https://pubs.acs.org/doi/10.1021/la00102a002https://doi.org/10.1021/la00102a002research-articleACS PublicationsRequest reuse permissionsArticle Views93Altmetric-Citations8LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts.The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Find more information on the Altmetric Attention Score and how the score is calculated. Share Add toView InAdd Full Text with ReferenceAdd Description ExportRISCitationCitation and abstractCitation and referencesMore Options Share onFacebookTwitterWechatLinked InRedditEmail Other access optionsGet e-Alertsclose Get e-Alerts
Efficient and Reusable Metal Heterogeneous Catalysts for Conversion of CO 2 Prepared from a Microwave Synthetized Porous Polyiminopyridine (2017)

Abstract A stable nitrogen‐rich porous polyimine containing pyridine units ( PIPy‐4Mw ) was successfully synthesized under microwave heating via a simple “one‐step” polycondensation in only 30 min without adding any catalyst. This versatile polymer can incorporate different transition metals leading polyiminopyridine‐supported catalysts; in this paper we report the synthesis and catalytic performance of heterogenized complexes of abundant earth metals such as iron(II), cobalt(II) and chromium(III) ( PIPy‐4MwFe , PIPy‐4MwCo and PIPy‐4MwCr ). These supported metal‐polyiminopyridines have been applied as heterogeneous catalysts in the conversion of CO 2 into cyclic carbonates, an interesting reaction to recycle CO 2 , and in another eco‐friendly reaction: the synthesis of additives for diesel fuels by acetalization of furfural. The cobalt and iron complexes have showed high efficiency and were reused without any significant change in their activities.
Prediction of Thermal Conductivities of Rubbers by MD Simulations—New Insights (2022)

In this article, two main approaches to the prediction of thermal conductivities by molecular dynamics (MD) simulations are discussed, namely non-equilibrium molecular dynamics simulations (NEMD) and the application of the Green-Kubo formula, i.e., EMD. NEMD methods are more affected by size effects than EMD methods. The thermal conductivities of silicone rubbers in special were found as a function of the degree of crosslinking. Moreover, the thermal conductivities of thermoplastic polyurethane as function of the mass fraction of soft segments were obtained by those MD simulations. All results are in good agreement with data from the experimental literature. After the analysis of normalized heat flux autocorrelation functions, it has been revealed that heat in the polymers is mainly transferred by low-frequency phonons. Simulation details as well as advantages and disadvantages of the single methods are discussed in the article.
Impact of bosch scallops dimensions on stress of an open through Silicon Via technology (2013)

The through Silicon Via (TSV) is a lead topic in interconnects and 3D integration research, mainly due to numerous anticipated advantages. However, several challenges must still be overcome if large scale production is to be achieved. In this work, we have studied the effects of Bosch scallops concerning mechanical reliability for a specific TSV technology. The presence of scallops on the TSV wall modifies the stress distribution along the via. By means of Finite Element Method (FEM) simulations, we assess this change in order to better understand the process. The achieved results support experiments and give further insight into the influence of scallops on the stress in an open TSV.
K2(NbO)2Si4O12: A new material for non-linear optics (1991)

Abstract The potassium niobyl cyclotetrasilicate K2(NbO)2Si4O12 crystallizes in the non-centrosymmetrical polar space group P4bm with a = 8.7404(8) Å, c = 8.136(1) Å, Z = 2. The acentric character of the structure is mainly due to a sequence of short (niobyl) and long Nb-O bonds along the 4-fold axes. Optical studies on small crystals have shown that the transparency range extends from 0.3 to 4.5 μm and that they are positively uniaxial. Second harmonic generation tests, as a function of temperature, have been performed on a polycrystalline sample with use of the 1.06 μm line of a YAG-Nd laser. They show that phase matching conditions are still obtained at 1080[ddot]C (limit of the equipment). K2(NbO)2Si4O12 melts congruently at 1180[ddot]C and appears as rather inert and chemically stable.
Harmonic control of three-phase AC/DC converter (2023)

In this paper, we propose a harmonic-model based control approach for the three-phase grid-tied AC-DC converter. We derive a nonlinear harmonic domain model and demonstrate its efficacy in designing harmonic control with global stability guarantees. Furthermore, we establish that this harmonic control design can be translated into a periodic nonlinear control scheme in the time domain, maintaining the same level of stability guarantees. Additionally, the proposed framework allows to incorporate control objectives specifically related to harmonic distortion and harmonic mitigation as well as the tracking of periodic trajectories. Illustrative simulations and experimental setups were conducted to evaluate the effectiveness of the proposed methodology in reducing Total Harmonic Distortion (THD) in real-time. The obtained results demonstrate the successful achievement of the desired control objectives, validating the efficacy of the proposed harmonic control approach.
Modeling and Mitigation of Multiloops Related Device Overvoltage in Three-Level Active Neutral Point Clamped Converter (2019)

This article establishes an analytical model for the device drain-source overvoltage related to the two loops in three-level active neutral point clamped (3L-ANPC) converters. Taking into account the nonlinear device output capacitance, two common modulation methods are investigated in detail. The results show that the line switching frequency device usually has higher overvoltage, and the switching speed of the high switching frequency device is not strongly influenced by the multiple loops. By keeping the nonactive clamping switch off, the effect of the nonlinear device output capacitance can be significantly mitigated, which helps reduce the overvoltage. Moreover, the loop inductance can be reduced with vertical loop layout and magnetic cancellation in the printed circuit board and busbar design. A 500-kVA 3L-ANPC converter using silicon carbide mosfets was built and tested. The experimental results validate the overvoltage model of the two modulation methods as well as the busbar design. With the nonactive clamping switch off, the overvoltage of both the high and line switching frequency devices is significantly reduced, which helps achieve higher switching speed.
Overexpression of KNAT1 in Lettuce Shifts Leaf Determinate Growth to a Shoot-Like Indeterminate Growth Associated with an Accumulation of Isopentenyl-Type Cytokinins (2001)

Leaves are specialized organs characterized by defined developmental destiny and determinate growth. The overexpression of Knotted1-like homeobox genes in different species has been shown to alter leaf shape and development, but a definite role for this class of genes remains to be established. Transgenics that overexpress Knotted1-like genes present some traits that are characteristic of altered cytokinin physiology. Here we show that lettuce (Lactuca sativa) leaves that overexpress KNAT1, an Arabidopsis kn1-like gene, acquire characteristics of indeterminate growth typical of the shoot and that this cell fate change is associated with the accumulation of specific types of cytokinins. The possibility that the phenotypic effects of KNAT1 overexpression may arise primarily from the modulation of local ratios of different cytokinins is discussed.
Magnetic Nanoparticles Encapsulated Within a Thermoresponsive Polymer (2009)

This study describes a facile two-step approach to modify the surface of nanoparticles, thereby imparting a core-shell structure to the system. The core consists of magnetic nanoparticles and the shell is composed of thermoresponsive hydroxypropyl cellulose, using a coupling agent to covalently bind the core to the shell. Hydroxypropyl cellulose is known for its biocompatibility and biodegradability, and its thermoresponsive properties make it an excellent candidate for fabricating biocompatible stimuli-responsive magnetic nanoparticles. We report the synthesis of magnetic nanoparticles and the successful binding of the polymer to them. X-ray diffraction studies show that the surface modification of the magnetic nanoparticles does not result in any phase change and the size of the magnetic core thus calculated (7 nm) reveals that such hybrid core-shell system is superparamagnetic in nature, as further confirmed by magnetization measurements. The size obtained by X-ray diffraction is in good agreement with that obtained by transmission electron microscope. Evidence of binding is given by Fourier transform infrared spectroscopy and a quantitative analysis of the polymeric content obtained by thermogravimetry analysis. Dynamic light scattering as a function of temperature reveals the thermoresponsive behavior of the particles with a lower critical solution temperature around 41 degrees C, which is also the temperature at which cellulose undergoes a coil-to-globule transition.