gebhart/patrepeval huggingface dataset:
An Approach to Designing Origami-Adapted Aerospace Mechanisms (2016)

An approach to designing products based on adapting patterns and behaviors from origami is presented. The approach is illustrated by showing its capability for developing mechanism applications for aerospace-based systems. Origami has several attributes that are sought after in aerospace designs, such as deployability, stowability, and portability. The origami-adapted design process seeks to facilitate designers in reliably adapting origami into useful products that achieve desirable attributes. The origami-adapted design process is illustrated and tested using three examples of preliminary design: an origami bellows to protect the drill shafts of a Mars Rover, an expandable habitat for the International Space Station, and a deployable parabolic antenna for space and earth communication systems. Each of these examples starts with an origami fold pattern and modifies it to fulfill specific needs for an aerospace-based product.
Fabrication challenges for next-generation devices: Microelectromechanical systems for radio-frequency wireless communications (2003)

With wireless communications becoming an important technology and growth engine for the semiconductor industry, many semiconductor companies are developing technologies to differentiate themselves in this area. One means of accomplishing this goal is to find a way to integrate passive components, which currently make up more than 70% of the discrete components in a wireless handset, directly on-chip thereby greatly simplifying handsets. While a number of technologies are being investigated to allow on-chip integration, microelectromechanical systems technologies are an important part of this development effort. They have been used to create switches, filters, local oscillators, variable capacitors, and high-quality inductors, to name a few examples. The lithography requirements for these devices are very different than those found in standard semiconductor fabrication with the most important involving patterning over extreme topography. We discuss some of the fabrication challenges for these devices as well as some approaches that have been demonstrated to satisfy them.
Advanced Waveform Models for the Nano-Meter Regime (2003)

In the early years of digital system design, it was sufficient to model the delay of elements, so digital simulation tools used step functions to represent signals. As switching speeds increased, it became increasingly necessary to take into account the transition time of the signal. The simplest way of modeling the transition time is to upgrade the signal model from a step to a ramp, and this has been the state of digital design since the early eighties [1, 2]. As speeds increase further, however, the limitation of this approximation have become increasingly apparent. One well known problem is that of threshold selection, which-when not done properlycan lead to to negative delays [3, 4]. Also, many of the deepsubmicron phenomena (e.g. inductive interconnect, coupled noise, and power supply current) are difficult or impossible to model accurately with the ramp model.
Distribution of natural pollution surface layers on silicone rubber insulators and their UV absorption (1989)

The authors present results of uniformity distribution studies of an industrial type pollution layer on RTV silicone rubber insulator surfaces under natural conditions. Similar distributions were also measured on porcelain insulators. Results of investigations of the layer ability to absorb the UV irradiation for different types of contaminants, i.e. artificial and natural ones, are presented. It was found that naturally polluted composite insulators did not lose their good insulating properties after a long time in an extremely polluted area. Specifically, it was found that seven years service experience with silicone composite insulators have proved their usefulness for work under heavily polluted conditions. The housing material lost neither its elasticity nor its hydrophobic properties, despite the pollution layer accumulation on its surface. The layer is more uniformly distributed and thinner than on porcelain insulators. It can absorb about 40 to 60% of natural UV irradiation and significantly reduces its destructive action on the housing material. It is suggested that the good behaviour under these conditions may be caused by a screening effect of the surface pollutant, because of its significant ability to absorb UV irradiation.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">&gt;</ETX>
Design and Implementation of a Dual-Input LLC Converter with Semi-Active Rectifiers for PV Applications (2019)

This paper proposes a dual-input LLC resonant converter with semi-active rectifiers that interfaces with two PV panels. The topology is a combination of a dual half-bridge LLC circuit with four active switches on the primary and a full-bridge rectifier composed of two diodes and two switches on the secondary. This topology allows the two sources to share the same resonant tank for transferring energy to the load without additional circuit components. Independent maximum power point tracking (MPPT) for each PV panel is achieved by using a phase-shift pulse width modulation (PWM) control on primary side switches. The converter voltage gain is controlled by varying the operating frequency as in a typical LLC resonant converter. Soft-switching is realized in all switches over the entire range of source voltage and load conditions. A 500-W prototype was built to validate the performance of the proposed topology. The input voltage range is from 30 V to 50 V with an output voltage regulated at 210 V DC. The experimental results reveal that the proposed converter can achieve the maximum efficiency of 96.58 % while maintaining a wide input voltage range and implementing MPPT for each PV panel.
Total Antioxidant Activity and Fiber Content of Select Florida-Grown Tropical Fruits (2006)

Fourteen tropical fruits from south Florida (red guava, white guava, carambola, red pitaya (red dragon), white pitaya (white dragon), mamey sapote, sapodilla, lychee, longan, green mango, ripe mango, green papaya, and ripe papaya) were evaluated for antioxidant activity, total soluble phenolics (TSP), total ascorbic acid (TAA), total dietary fiber (TDF), and pectin. ORAC (oxygen radical absorbance capacity) and DPPH (1,1-diphenyl-2-picrylhydrazyl, radical scavenging activity) assays were used to determine antioxidant activity. The TSP, ORAC, and DPPH ranged from 205.4 to 2316.7 g gallic acid equiv/g puree, <0.1 to 16.7 micromol Trolox equiv/g puree, and 2.1 to 620.2 microg gallic acid equiv/g puree, respectively. The TAA, TDF, and pectin ranged from 7.5 to 188.8 mg/100 g, 0.9 to 7.2 g/100 g, and 0.20 to 1.04 g/100 g, respectively. The antioxidant activities, TSP, TAA, TDF, and pectin were influenced by cultivar (papaya, guava, and dragon fruit) and ripening stage (papaya and/or mango). Antioxidant activity showed high correlations with levels of TSP compounds (r = 0.96) but low correlations with levels of ascorbic acid (r = 0.35 and 0.23 for ORAC and DPPH data, respectively). The antioxidant activities evaluated by both ORAC and DPPH showed similar trends where red guava and carambola exhibited the highest and sapodilla and green papaya exhibited the lowest levels. Guava and mamey sapote exhibited the highest TDF and pectin levels. Many of the tropical fruits were shown to contain an abundance of hydrolyzable tannins, ellagic acid conjugates, and flavone glycosides. Preliminary descriptions are given of the phenols in red/white pitaya (dragonfruit), lychee, and mamey sapote, these fruit being thus far uncharacterized in the literature.
Wavefront control in adaptive microscopy using Shack-Hartmann sensors with arbitrarily shaped pupils (2018)

In adaptive optical microscopy of thick biological tissue, strong scattering and aberrations can change the effective pupil shape by rendering some Shack-Hartmann spots unusable. The change of pupil shape leads to a change of wavefront reconstruction or control matrix that should be updated accordingly. Modified slope and modal wavefront control methods based on measurements of a Shack-Hartmann wavefront sensor are proposed to accommodate an arbitrarily shaped pupil. Furthermore, we present partial wavefront control methods that remove specific aberration modes like tip, tilt and defocus from the control loop. The proposed control methods were investigated and compared by simulation using experimentally obtained aberration data. The performance was then tested experimentally through closed-loop aberration corrections using an obscured pupil.
Breast imaging and biopsy in women after therapeutic mammoplasty: comparison with women after wide local excision (2009)

Methods Following local research ethics approval, all women attending the assessment clinic for evaluation of a mammographic abnormality found on routine screening (film-screen) were invited to take part in the study subject to informed consent. Participants underwent bilateral two-view two-dimensional (2D) digital mammography and bilateral twoview DBT. Mammography scores using the RCR Breast Group classification were sequentially obtained for the screening mammogram, 2D digital and DBT, and these were each compared with the final assessment outcome. Results Ninety-one percent of eligible women participated. Results from the first 300 participants are presented in Table Kappa coefficients for agreement of each imaging method with final assessment outcome were calculated. Screening mammograms had the lowest agreement with the final outcome (Kappa = 0.02; P = 0.22), 2D digital mammography was better (Kappa = 0.26; P = 0.0000) and DBT had the highest score (Kappa = 0.37; P = 0.0000).
1-bit Band-Pass Delta-Sigma Modulator with Parallel IIR Form for Concurrent Multiband Digital Transmitter (2017)

We propose an architecture for a 1-bit band-pass delta-sigma modulator (BP-DSM) that outputs concurrent multiband RF signals. The proposed BP-DSM consists of parallel bandpass filters (BPFs) in the feedback loop to suppress the quantization noise at each target frequency band while maintaining the stability. Each BPF is based on second-order parallel infinite impulse response (IIR) filters. This architecture can unify and reconfigure the split BPFs according to the number of bands. The architecture complexity is proportional to the bandwidth of each RF signal and is independent of the carrier spacing between the bands. The conventional architecture of a concurrent multiband digital modulator, reported previously, has multiple input ports to the dedicated BPF at each band and so it cannot be efficiently integrated. Measurements show that the proposed architecture is feasible for transmitting a concurrent dual-band and a triple-band by changing the 1-bit digital data stream while keeping a data transmission rate of 10Gb/s. We demonstrate that the proposed architecture outputs the signal with LTE intra-band and inter-band carrier aggregation on 0.8GHz, 2.1GHz and 3.5GHz, each with 40MHz bandwidth in 120MHz aggregated bandwidth, whose bandwidth surpasses the bandwidth with carrier aggregation of LTE-A up to 100MHz. Adjacent channel leakage ratios of -49dBc and -46dBc are achieved at 3.5GHz in the concurrent dual-band and triple-band, respectively.
Comparison of Two Adalimumab Treatment Schedule Strategies for Moderate-to-Severe Crohn's Disease: Results From the CHARM Trial (2009)

For patients with active CD, continuous treatment with adalimumab was more effective than a strategy of induction dosing followed by reinitiation of adalimumab with clinical deterioration for maintenance of clinical remission, improved quality-of life outcomes, reduced flares, and a decrease in number of surgeries and risk of hospitalization.
Observation of an aziridine intermediate in a displacement reaction on tetrahydro-5-(tosyloxy)-2(1H)-pyrimidinone (1984)

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTObservation of an aziridine intermediate in a displacement reaction on tetrahydro-5-(tosyloxy)-2(1H)-pyrimidinoneDavid A. Berges and Stanley J. SchmidtCite this: J. Org. Chem. 1984, 49, 23, 4555–4557Publication Date (Print):November 1, 1984Publication History Published online1 May 2002Published inissue 1 November 1984https://pubs.acs.org/doi/10.1021/jo00197a053https://doi.org/10.1021/jo00197a053research-articleACS PublicationsRequest reuse permissionsArticle Views129Altmetric-Citations7LEARN 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
Endohedral Fullerene Ions: Synthesis, Structure and Reaction (2002)

Views Icon Views Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Icon Share Twitter Facebook Reddit LinkedIn Tools Icon Tools Reprints and Permissions Cite Icon Cite Search Site Citation T. Wakahara, Y. Maeda, S. Ohkubo, J. Kobayashi, M. Kondo, T. Akasaka, K. Kobayashi, S. Nagase, T. Kato, M. Kako, K. Yamamoto, K. M. Kadish; Endohedral Fullerene Ions: Synthesis, Structure and Reaction. AIP Conf. Proc. 14 October 2002; 633 (1): 43–46. https://doi.org/10.1063/1.1514070 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 ContentAIP Publishing PortfolioAIP Conference Proceedings Search Advanced Search |Citation Search
Redistribution Layer Defect Classification Using Computer Vision Techniques And Machine Learning (2020)

In the semiconductor industry, defects are yield killers and the detection/classification of which can be expensive as well as time consuming. To overcome this challenge, we propose a solution involving Computer Vision Techniques and Machine Learning to accomplish defect binning procedure in typical wafer-level packaging scenario, focusing on 2um L/S redistribution layer (RDL) features. With this approach, inspection cycle time is reduced, thereby driving faster product development.
Mononuclear and Mixed-Valence Binuclear Oxovanadium Complexes with Benzimidazole-Derived Chelating Agents (2002)

Oxovanadium complexes with H(2)bzimpy (2,6-bis[benzimidazol-2'-yl]pyridine) and Me(2)bzimpy (2,6-bis[N'-methylbenzimidazol-2'-yl]pyridine), and H(3)ntb (tris[benzimidazol-2'-yl-methyl]amine) and Me(3)ntb (tris[N'-methylbenzimidazol-2'-yl-methyl]amine) have been synthesized. Dioxovanadium(V) and oxovanadium(IV) complexes prepared from H(2)bzimpy and Me(2)bzimpy are [V(V)O(2)(Hbzimpy)].1.25H(2)O (1), [V(V)O(2)(Me(2)bzimpy)](ClO(4)).H(2)O (3), [V(IV)O(H(2)bzimpy)(H(2)O)(2)](CF(3)SO(3))(2).2H(2)O (2), and [V(IV)O(Me(2)bzimpy)(H(2)O)(2)](CF(3)SO(3))(2) (4). H(3)ntb and Me(3)ntb afforded oxovanadium(IV) complexes, [V(IV)O(Hntb)].2MeOH (5), [V(IV)O(H(3)ntb)Cl]Cl.H(2)O (7), [V(IV)O(Me(3)ntb)SO(4)].H(2)O (9), [V(IV)O(Me(3)ntb)Cl]Cl.H(2)O (10), and mixed-valence complexes, [(H(3)ntb)V(IV)O(mu-O)V(V)O(H(3)ntb)](CF(3)SO(3))(3).2H(2)O (8) and [(Me(3)ntb)V(IV)O(mu-O)V(V)O(Me(3)ntb)](CF(3)SO(3))(3).3H(2)O (11). Crystal structures of 2, 7, and 11 are reported. The mixed-valence complexes, 8 and 11, show 15-line isotropic ESR spectra in fluid solutions at room temperature. These compounds also exhibit an intervalence transfer band around 1015 nm which is essentially independent of solvent, so these compounds are stable, mixed-valence species where the single unpaired electron is delocalized over the two vanadium centers at ambient temperature. With respect to one-electron reduction, the dioxovanadium(V) complexes are redox-potential equivalent with their monooxovanadium(IV) counterparts.
Bilateral Adrenal Hyperplasia as a Possible Mechanism for Hyperandrogenism in Women With Polycystic Ovary Syndrome (2016)

In a subset of young women with PCOS, we detected a pattern of glucocorticoid secretion that mimicked that of patients with micronodular adrenocortical hyperplasia: they had smaller adrenal volumes and higher steroid hormone secretion after dexamethasone compared with the group of PCOS with appropriate response to dexamethasone.
Expression of the hepatitis B virus surface antigen gene in cell culture by using a simian virus 40 vector (recombinant DNA/animal virus/gene expression/antigen characterization) (2016)

We have constructed a simian virus 40 recom- binant carrying a fragment of DNA from hepatitis B virus. Cul- tured monkey kidney cells infected with this recombinant produce hepatitis B surface antigen. The antigen is excreted into the cul- ture medium as 22-nm particles with the same physical properties, antigenic composition, and constituent polypeptides as those found in the sera of patients with type B hepatitis. At least half of the world population shows evidence of past or present infection by hepatitis B virus (HBV), and the approxi- mately 200 million carriers in the world are at serious risk of chronic liver disease and, possibly, primary liver cancer. The classic marker for chronic infection by this virus is the surface antigen HBsAg which circulates in the serum of HBV carriers
Sensitive and Precise Quantification of Insulin-Like mRNA Expression in Caenorhabditis elegans (2011)

Insulin-like signaling regulates developmental arrest, stress resistance and lifespan in the nematode Caenorhabditis elegans. However, the genome encodes 40 insulin-like peptides, and the regulation and function of individual peptides is largely uncharacterized. We used the nCounter platform to measure mRNA expression of all 40 insulin-like peptides as well as the insulin-like receptor daf-2, its transcriptional effector daf-16, and the daf-16 target gene sod-3. We validated the platform using 53 RNA samples previously characterized by high density oligonucleotide microarray analysis. For this set of genes and the standard nCounter protocol, sensitivity and precision were comparable between the two platforms. We optimized conditions of the nCounter assay by varying the mass of total RNA used for hybridization, thereby increasing sensitivity up to 50-fold and reducing the median coefficient of variation as much as 4-fold. We used deletion mutants to demonstrate specificity of the assay, and we used optimized conditions to assay insulin-like gene expression throughout the C. elegans life cycle. We detected expression for nearly all insulin-like genes and find that they are expressed in a variety of distinct patterns suggesting complexity of regulation and specificity of function. We identified insulin-like genes that are specifically expressed during developmental arrest, larval development, adulthood and embryogenesis. These results demonstrate that the nCounter platform provides a powerful approach to analyzing insulin-like gene expression dynamics, and they suggest hypotheses about the function of individual insulin-like genes.
Predictive Analytics Integrated Multi-level Optimization of Offshore Connectivity in Ocean Network (2021)

One of the primary difficulties of fishermen engaged in deep-sea fishing is the lack of effective communication systems to the shore. The Offshore Communication Network(OCN) resolves this problem by providing Internet over the ocean through a fishing vessel network. OCN is a multi-layered architecture with heterogeneous connectivity ranges, directionality, resources, and mobility patterns. Connectivity maintenance is challenging due to the lack of infrastructure, expanded mobility, network sparsity, and sea-wave-induced movements. This paper discusses a framework to improve OCN connectivity with a multi-level optimization strategy. We propose a predictive model to generate real-time forecasts of link status. At the physical level, node position re-orientations to higher connectivity locations are suggested. The transmission queue management and prioritized scheduling in the link-layer minimize the queuing delay. A reinforcement routing strategy in the network layer determines the best next-hop for message dissemination. The proposed three-level optimization approach facilitates communication capability enhancement in OCN.
Application of terahertz spectrum in the detection of harmful food additive (2007)

Terahertz technology is a potentially useful tool for biosensing applications. Previous reports proved to be effective in detecting the signature spectrum of some molecules. In this study, which analyzes the terahertz transmission characteristics of bimolecular samples in solution, we propose a membrane device to hold a sample in solution. This device allows preparation of small sample amounts and is easier to use than current methods. We measured several harmful food additives using time-domain spectroscopy and found that, in some of them, vibrational features such as signature peaks are present not only in pellet samples but also in sample solutions. Results indicate this system is able to detect the harmful food additives and suggest the potential of the membrane device in THz-wave biosensing applications.
Power Based Topologies and TE-Shortest Power Paths in OSPF (2013)

In a Interior Gateway Protocol like OSPF (Open Shortest Path First)
the computation of the Constrained shortest path to destinations is
computed for an area say a backbone or a non-backbone area using the
TE-metrics advertised in the area. With importance given to the
reduction of power within a network it becomes important to provide a
solution that reduces the power consumed amongst routers and links
that make up the network (in this case an area or a collection of
areas including the backbone and non-backbone areas). This proposal
aims at providing such a solution by producing a power topology of the
area / areas. This power topology is constructed by assigning metrics
to links based on the power consumed by the linecards (and hence their
respective ports in an indirect way) of adjacent routers that are
interconnected by each such link.
ChemInform Abstract: Heterogeneous Henry Reaction of Aldehydes: Diastereoselective Synthesis of Nitroalcohol Derivatives over Mg‐Al Hydrotalcites. (1999)

Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
Chemical upcycling of polymers (2021)

As the production volume of polymers increases, so does the amount of plastic waste. Plastic recycling is one of the concepts to address in this issue. Unfortunately, only a small fraction of plastic waste is recycled. Even with the development of polymers for closed loop recycling that can be in theory reprocessed infinitely the inherent dilemma is that because of collection, cleaning and separation processes the obtained materials simply are not cost competitive with virgin materials. Chemical upcycling, the conversion of polymers to higher valuable products, either polymeric or monomeric, could mitigate this issue. In the following article, we highlight recent examples in this young but fast-growing field. This article is part of the theme issue 'Bio-derived and bioinspired sustainable advanced materials for emerging technologies (part 2)'.