gebhart/patrepeval huggingface dataset:
Putting Employees in Their Place: The Impact of Hot Desking on Organizational and Team Identification (2007)

A study of employees in the finance industry tested the propositions (a) that work team identity is more salient than organizational identity when desks are assigned, whereas organizational identity is more salient when they are not; and (b) that this is partly because physical arrangements have a significant bearing on the way in which employees engage with the organization as well as who they are most likely to engage with (i.e., impacting on the type and focus of organizational participation). The study measured levels of work team and organizational identity in matched samples of employees (N=142) assigned to desks and not assigned (i.e., hot desked), as well as their perceptions of the use, importance, and effectiveness of electronic and face-to-face communication as indicators of different types of organizational participation. Results support the hypotheses. The perceived value of electronic communication also accounted for significant variance in organizational identification for all employees. Findings point to a number of practical implications relating to the use of hot desking in the workplace.
Local Derivative Pattern Versus Local Binary Pattern: Face Recognition With High-Order Local Pattern Descriptor (2009)

This paper proposes a novel high-order local pattern descriptor, local derivative pattern (LDP), for face recognition. LDP is a general framework to encode directional pattern features based on local derivative variations. The n(th)-order LDP is proposed to encode the (n-1)(th) -order local derivative direction variations, which can capture more detailed information than the first-order local pattern used in local binary pattern (LBP). Different from LBP encoding the relationship between the central point and its neighbors, the LDP templates extract high-order local information by encoding various distinctive spatial relationships contained in a given local region. Both gray-level images and Gabor feature images are used to evaluate the comparative performances of LDP and LBP. Extensive experimental results on FERET, CAS-PEAL, CMU-PIE, Extended Yale B, and FRGC databases show that the high-order LDP consistently performs much better than LBP for both face identification and face verification under various conditions.
Enhanced Stability of Janus Nanoparticles by Covalent Cross-Linking of Surface Ligands (2011)

A mercapto derivative of diacetylene was used as the hydrophilic ligand to prepare Janus nanoparticles by using hydrophobic hexanethiolate-protected gold (AuC6, diameter 5 nm) nanoparticles as the starting materials. The amphiphilic surface characters of the Janus nanoparticles were verified by contact angle measurements, as compared to those of the bulk-exchange counterparts where the two types of ligands were distributed rather homogeneously on the nanoparticle surface. Dynamic light scattering studies showed that the Janus nanoparticles formed stable superstructures in various solvent media that were significantly larger than those by the bulk-exchange counterparts. This was ascribed to the amphiphilic characters of the Janus nanoparticles that rendered the particles to behave analogously to conventional surfactant molecules. Notably, because of the close proximity of the diacetylene moieties on the Janus nanoparticle surface, exposure to UV irradiation led to effective covalent cross-linking between the diacetylene moieties of neighboring ligands, as manifested in UV-vis and fluorescence measurements where the emission characteristics of dimers and trimers of diacetylene were rather well-defined, in addition to the monomeric emission. In contrast, for bulk-exchange nanoparticles, no trimer emission could be identified, and the intensity of dimer emission was markedly lower (though the intensity increased with increasing diacetylene coverage on the particle surface) under the otherwise identical experimental conditions. This is largely because the diacetylene ligands were distributed on the entire particle surface, and it was difficult to find a large number of ligands situated closely so that the stringent topochemical principles for the polymerization of diacetylene derivatives could be met. Importantly, the cross-linked Janus nanoparticles were found to exhibit marked enhancement of the structural integrity, which was attributable to the impeded surface diffusion of the thiol ligands on the nanoparticle surface, as manifested in fluorescence measurements of aged nanoparticles.
Introduction (2021)

This is a book about clothing and adornment in the world that gave rise to the Hebrew Bible. On the one hand, then, this is a book concerned with <italic>material culture</italic>: with the various garments and items of adornment that we read about in the pages of the Bible, or with the material remains of objects such as jewellery and cosmetic cases that have been recovered from the ancient Levant....
Micropeg manipulation with a compliant microgripper (2004)

This paper presents analytical, simulation and experimental results from a study of compliant insertion tasks in microassembly. Gripper compliance is desirable to compensate for positional errors and to prevent the breakage of a gripper during assembly tasks. An analytical model is derived to study the motion and force profiles during compliant insertion. Thermal bimorph microgrippers with a compliant tip are designed and fabricated using a silicon DRIE process, and are mounted on a precision motion stage. A series of micropeg manipulation tasks such as pick up, rotation, and insertion are successfully performed. Finally, a comb structure is integrated in the gripper to calculate insertion force by measuring the deflection of a gripper, which is essential for automated microassembly.
Quantum dots to monitor RNAi delivery and improve gene silencing (2005)

A critical issue in using RNA interference for identifying genotype/phenotype correlations is the uniformity of gene silencing within a cell population. Variations in transfection efficiency, delivery-induced cytotoxicity and 'off target' effects at high siRNA concentrations can confound the interpretation of functional studies. To address this problem, we have developed a novel method of monitoring siRNA delivery that combines unmodified siRNA with seminconductor quantum dots (QDs) as multi color biological probes. We co-transfected siRNA with QDs using standard transfection techniques, thereby leveraging the photostable fluorescent nanoparticles to track delivery of nucleic acid, sort cells by degree of transfection and purify homogenously-silenced subpopulations. Compared to alternative RNAi tracking methods (co-delivery of reporter plasmids and end-labeling the siRNA), QDs exhibit superior photostability and tunable optical properties for an extensive selection of non-overlapping colors. Thus this simple, modular system can be extended toward multiplexed gene knockdown studies, as demonstrated in a two color proof-of-principle study with two biological targets. When the method was applied to investigate the functional role of T-cadherin (T-cad) in cell-cell communication, a subpopulation of highly silenced cells obtained by QD labeling was required to observe significant downstream effects of gene knockdown.
High-resolution triacylglycerol mixture analysis using high-temperature gas chromatography / mass spectrometry with a polarizable stationary phase, negative ion chemical ionization, and mass-resolved chromatography (1996)

High-temperature gas chromatography/mass spectrometry (HT-GC/MS) has been employed to study the behavior of mixtures of triacylglycerol molecular species on a polarizable stationary phase (immobilized 65% phenyl methyl silicone). The use of negative ion chemical ionization (NICI) at an ion source block temperature of 300 °C overcomes problems with interpretation of electron ionization (EI) mass spectra produced during the HT-GC/MS. The NICI spectra of triacylglycerols produced under these conditions contain abundant [RCO2](-), [RCO2 - 18](-), and [RCO2 - 19](-) ions, believed to be produced by nucleophilic gas-phase ammonolysis, that are used to identify the individual fatty acid moieties associated with peaks in triacylglycerol total ion chromatograms. The polarizable stationary phase produces significantly enhanced resolution of triacylglycerol molecular species compared to hightemperature stable apolar stationary phases, such as immobilized dimethyl polysiloxanes. The resolution of complex natural mixtures of triacylglycerols can be further improved by use of the Biller-Biemann enhancement technique to produce mass-resolved chromatograms. Investigation of the mass-resolved chromatograms provides important information with regard to the factors that affect elution orders of individual triacylglycerol molecular species. The analysis of mixtures of authentic triacylglycerols by HT-GC/MS via NICI provides data that relate to the analytical limits of the technique for the analysis of triacylglycerols that bear both saturated and polyunsaturated fatty acyl moieties.
Direct selection of stabilised yeast<i>URA3</i>transformants with 5-fluorouracil (1991)

Journal Article Direct selection of stabilised yeast URA3 transformants with 5-fluorouracil Get access Michael A. Romanos, Michael A. Romanos * Wellcome Research LaboratoriesLangley Court, Beckenham, Kent BR3 3BS, UK * To whom correspondence should be addressed Search for other works by this author on: Oxford Academic PubMed Google Scholar Katrina M. Beesley, Katrina M. Beesley Wellcome Research LaboratoriesLangley Court, Beckenham, Kent BR3 3BS, UK Search for other works by this author on: Oxford Academic PubMed Google Scholar Jeffrey J. Clare Jeffrey J. Clare Wellcome Research LaboratoriesLangley Court, Beckenham, Kent BR3 3BS, UK Search for other works by this author on: Oxford Academic PubMed Google Scholar Nucleic Acids Research, Volume 19, Issue 1, 11 January 1991, Page 187, https://doi.org/10.1093/nar/19.1.187 Published: 11 January 1991 Article history Received: 13 November 1990 Published: 11 January 1991
Dispersal from Microbial Biofilms (2015)

One common feature of biofilm development is the active dispersal of cells from the mature biofilm, which completes the biofilm life cycle and allows for the subsequent colonization of new habitats. Dispersal is likely to be critical for species survival and appears to be a precisely regulated process that involves a complex network of genes and signal transduction systems. Sophisticated molecular mechanisms control the transition of sessile biofilm cells into dispersal cells and their coordinated detachment and release in the bulk liquid. Dispersal cells appear to be specialized and exhibit a unique phenotype different from biofilm or planktonic bacteria. Further, the dispersal population is characterized by a high level of heterogeneity, reminiscent of, but distinct from, that in the biofilm, which could potentially allow for improved colonization under various environmental conditions. Here we review recent advances in characterizing the molecular mechanisms that regulate biofilm dispersal events and the impact of dispersal in a broader ecological context. Several strategies that exploit the mechanisms controlling biofilm dispersal to develop as applications for biofilm control are also presented.
Time delay estimation using the cross bispectrum (1992)

The cross bispectrum phase can be effectively used to estimate the time required for a nonGaussian signal to propagate between a pair of spatially separated sensors in the presence of highly correlated Gaussian noise. The authors present a consistent estimator of the phase of the cross bispectrum, derive the exact distribution of the phase of a complex Gaussian sample bispectrum, and show that in most cases the exact distribution can be approximated by a Gaussian distribution. Using this Gaussian approximation, the authors derive the variance of the time delay estimate computed from the sample cross bispectrum of a signal in additive correlated noise. These results allow the performance of time delay estimators based on the cross bispectrum phase to be quantified as a function of the sample size, the skewness of the signal, the signal-to-noise ratio (SNR), and the noise correlation.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">></ETX>
AppEcho: a user-driven, in situ feedback approach for mobile platforms and applications (2014)

Mobile platforms and applications are an exciting and important phenomenon in today's software and business world. They are being woven into the fabric of daily life faster than expected. Continuous collection of user feedback enabling the improvement of platforms and applications becomes critical to support the continuous evolution of mobile systems. Particularly user feedback is needed to provide systems that best fit user needs. We have designed a mobile feedback approach, which enables users to document individual feedback on mobile systems in situ. This information can then be evaluated and used as new requirements by developers. Based on this solution we have developed a feedback app for two different mobile platforms. Furthermore, we have conducted a study with smartphone users applying this approach and communicating feedback on a mobile platform and pre-installed apps. The study revealed that users were able to give individual feedback and that a large amount of this feedback was considered to be useful for mobile system improvement by a platform developer.
Isolation and Characterization of Metabolites from<i>Pseudomonas fluorescens</i>-D7 for Control of Downy Brome (<i>Bromus tectorum</i>) (1994)

Downy brome is a grassy weed that infests millions of acres of winter wheat in the Western United States and costs farmers millions of dollars in lost yields. It can not be controlled consistently using chemicals or cultural practices. Isolates of naturally occurring rhizobacteria have shown potential as biological control agents for downy brome. Centrifuged supernatant from aerobic shake cultures of Pseudomonas fluorescens strain D7 suppressed germination of seeds and reduced root and shoot growth of downy brome in agar diffusion assays. The present article relates to the isolation and characterization of active compounds from strain D7. The active compounds were denatured and lost activity with commonly used techniques of extraction, concentration, and purification of microbial products. Two unusual techniques for isolation and partial purification of the active compounds from supernatant of strain D7 were developed. With one technique, supernatant was concentrated at 30 to 35 C under vacuum to 10% of the initial volume. Subsequently, the concentrate was chromatographed on sephadex gels to separate the active fraction. With the second technique, cell-free supernatant was frozen, with or without prior concentration, at −12 C for 12 to 24 h. The frozen supernatant was then thawed at 2 to 4 C, resulting in precipitation and crystallization of the active fraction. The active fraction isolated with either method inhibited downy brome. Inhibition was complete at concentrations as low as 1 mg total dry matter L -1 agar. Also, the active fraction inhibited the plant pathogenic fungus Gaeumannomyces graminis var. tritici. Chemical analysis of the active fraction complex revealed the presence of chromopeptides and other peptides, fatty acid esters, and a lipopolysaccharide matrix. Separation of any of the components from the complex resulted in nearly complete loss of activity against downy brome.
Diagnosis of dysplasia in Barrett's oesophagus with in-situ elastic-scattering spectroscopy (2000)

Barrett's oesophagus is a metaplstic condition resulting from acid reflux that affects a small but significant percentage of the population. Detection of pre-malignant changes within this tissue may allow for preemptive treatment against oesophageal cancer. Optical biopsies using elastic scattering spectroscopy are being investigated as a possible in-situ diagnostic technique.
Fast Traffic Sign Recognition via High-Contrast Region Extraction and Extended Sparse Representation (2015)

In this paper, we propose a high-performance traffic sign recognition (TSR) framework to rapidly detect and recognize multiclass traffic signs in high-resolution images. This framework includes three parts: a novel region-of-interest (ROI) extraction method called the high-contrast region extraction (HCRE), the split-flow cascade tree detector (SFC-tree detector), and a rapid occlusion-robust traffic sign classification method based on the extended sparse representation classification (ESRC). Unlike the color-thresholding or extreme region extraction methods used by previous ROI methods, the ROI extraction method of the HCRE is designed to extract ROI with high local contrast, which can keep a good balance of the detection rate and the extraction rate. The SFC-tree detector can detect a large number of different types of traffic signs in high-resolution images quickly. The traffic sign classification method based on the ESRC is designed to classify traffic signs with partial occlusion. Instead of solving the sparse representation problem using an overcomplete dictionary, the classification method based on the ESRC utilizes a content dictionary and an occlusion dictionary to sparsely represent traffic signs, which can largely reduce the dictionary size in the occlusion-robust dictionaries and achieve high accuracy. The experiments demonstrate the advantage of the proposed approach, and our TSR framework can rapidly detect and recognize multiclass traffic signs with high accuracy.
Depth resolution of the fluorescent confocal scanning optical microscope (1990)

The fluorescent confocal scanning optical microscope is capable of 3-D observation, for which depth discrimination is vital. To characterize the depth discrimination capability of this microscope, intensity variations depending on fluorescence wavelength are simulated for fluorescent films being moved in the depth direction. Also, the resolution between two films is calculated for a range of fluorescence wavelengths. Results of experiments using photoresist films are compared to simulations. As a practical application, through-holes opened in a thick photoresist film are observed by slice images in the depth direction.
Structure and behavior of spermidine siderophores (1980)

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStructure and behavior of spermidine siderophoresT. Peterson, Karl Erik Falk, Sally A. Leong, Melvin P. Klein, and J. B. NeilandsCite this: J. Am. Chem. Soc. 1980, 102, 26, 7715–7718Publication Date (Print):December 1, 1980Publication History Published online1 May 2002Published inissue 1 December 1980https://pubs.acs.org/doi/10.1021/ja00546a013https://doi.org/10.1021/ja00546a013research-articleACS PublicationsRequest reuse permissionsArticle Views520Altmetric-Citations46LEARN 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
The peroxidic species generated by ozonolysis of oleic acid or methyl oleate in a carboxylic acid medium (1992)

The ozonolysis of oleic acid or methyl oleate in a carboxylic acid medium produces three major peroxidic species as well as aldehyde. These peroxidic compounds have been identified as 1‐acyloxyalkyl‐1‐hydroperoxides, 1,2,4‐trioxolanes, and bis(1‐acyloxy‐1‐alkyl) peroxides. The bis(1‐acyloxy‐1‐alkyl) peroxides have not been reported previously as oleic acid or methyl oleate ozonolysis products. A 1 H nuclear magnetic resonance examination of the ozonization products of oleic acid or methyl oleate in carboxylic acids, as well as methanol and iso‐octane, led to the identification of the peroxidic compounds and aldehyde.
Advanced Membrane Technology and Applications (2008)

Advanced membrane technology and applications , Advanced membrane technology and applications , کتابخانه دیجیتال جندی شاپور اهواز
An Automated System for Measuring Elastic Properties by the Piezoelectric Resonance Method and Its Applications to Elastic Phase Transitions (1991)

Experiments have been performed to construct an automated system for measuring elastic constants of piezoelectric substances by the piezoelectric resonance method. The measuring system was automated by introducing a network analyzer controlled through a GP-IB interface by a personal computer. The system was applied for investigating the ferroelectric phase transition of KDP and the ferroelastic phase transition of LAT. Excellent data were obtained for both compounds, and it was confirmed that the measuring system was applicable to the investigation of the phase transitions with large elastic anomalies.
Accelerating Switching Speed of Thermo-optic MZI Silicon-Photonic Switches with “Turbo Pulse” in PWM Control (2017)

We implemented a novel heater control scheme with high-energy header pulses applied to silicon Mach-Zehnder switches. Four to five times faster switching time (5.8 μs and 4.4 μs) was achieved for heating-up and cooling-down operations.
Great Expectations: Private Sector Activity in Tissue Engineering, Regenerative Medicine, and Stem Cell Therapeutics (2008)

This report draws upon data from a variety of sources to provide a detailed estimate of the current scope of private sector development and commercial activity in the aggregate field comprising tissue engineering, regenerative medicine, and stem cell therapeutics. Economic activity has grown a remarkable fivefold in the past 5 years. As of mid-2007 approximately 50 firms or business units with over 3000 employees offered commercial tissue-regenerative products or services with generally profitable annual sales in excess of $1.3 billion. Well over a million patients have been treated with these products. In addition, 110 development-stage companies with over 55 products in FDA-level clinical trials and other preclinical stages employed approximately 2500 scientists or support personnel and spent 850 million development dollars in 2007. These totals represent a remarkable recovery from the downturn of 2000-2002, at which time tissue engineering was in shambles because of disappointing product launches, failed regulatory trials, and the general investment pullback following the dot-com crash. Commercial success has resulted in large measure from identification of products that are achievable with available technology and under existing regulatory guidelines. Development-stage firms have become much more adept at risk management. The resilience of the field, as well as its current breadth and diversity, augurs well for the future of regenerative medicine.