gebhart/patrepeval huggingface dataset:
Modeling and predicting temporal patterns of web content changes (2015)

The technologies aimed at Web content discovery, retrieval and management face the compelling need of coping with its highly dynamic nature coupled with complex user interactions. This paper analyzes the temporal patterns of the content changes of three major news websites with the objective of modeling and predicting their dynamics. It has been observed that changes are characterized by a time dependent behavior with large fluctuations and significant differences across hours and days. To explain this behavior, we represent the change patterns as time series. The trend and seasonal components of the observed time series capture the weekly and daily periodicity, whereas the irregular components take into account the remaining fluctuations. Models based on trigonometric polynomials and ARMA components accurately reproduce the dynamics of the empirical change patterns and provide extrapolations into the future to be used for forecasting.
Optimal Stratification of Item Pools in α-Stratified Computerized Adaptive Testing (2003)

A method based on 0-1 linear programming (LP) is presented to stratify an item pool optimally for use in α-stratified adaptive testing. Because the 0-1 LP model belongs to the subclass of models with a network flow structure, efficient solutions are possible. The method is applied to a previous item pool from the computerized adaptive testing (CAT) version of the Graduate Record Exams (GRE) Quantitative Test. The results indicate that the new method performs well in practical situations. It improves item exposure control, reduces the mean squared error in the θ estimates, and increases test reliability. Index terms: computerized adaptive testing, α-stratified adaptive testing, item pool stratification, 0-1 linear programming
[Stereotaxic resection of intracerebral tumors]. (1996)

Stereotactic computerized technology providing a goal-oriented and low-traumatic access to small intracerebral tumors and their precision microsurgical removal has been developed. A specialized programme implemented on an IBM PC/AT makes a whole set of stereotactic calculations based on computerized tomography (CT). With this, a three-dimensional volumetric tumor reconstruction is conducted by interpolating the tumor outlines which can be seen on consecutive stereotactic CT sections. The system provides laminar visualization of the tumor outlines in the distal aperture plane of an original tubular retractor which makes an access to the tumor and its removal and coincides these sections with the aperture projection. Thus, each discrete unit of tumor volume (minimum 1 cubic mm) proves to be stereotactically oriented against the retractor both in the plane of its aperture and along its trajectory. Examining the images prio and during surgery simulates an operational field, thus computerally supporting the resection of a tumor strictly in the range of CT-defined outlines. A total of 15 patients aged 3 to 52 years who had hemispheric tumors were treated. Five patients presented with cancer metastases (one of them had multiple ones), 7 had gliomas and 1 displayed a radiation necrotic focus at the site of the irradiated glial tumor that was verified by stereotactic biopsy, 2 cases had cavernous angiomas. The use of stereotactic techniques for tumor removal in these patients was determined by their location and small sizes. Eight cases presented with in-depth tumors located in the area of subcortical ganglions, the visual tuber, and the internal bursa. In 7 patients there were a comparatively superficial tumors afflicting the cortex and substantia alba in the projection of central gyri or temporoparietal regions in the predominant hemisphere. The maximum dimensions of tumors varied 10 to 35 mm without exceeding 25 mm in most (14) patients. A small circulatory trephination with a crown cutter, 35 mm in diameter, was employed in the majority of cases (in 13 patients). In 3 cases, there was a slight and transient aggravation of the existing focal symptomatology followed by regression and return to the preoperative values during 5-6 days. Following surgery, 10 had either improved status or no additional iatrogenic defect or they underwent outpatient treatment within 6-7 days after intervention. In 2 cases, a steady-state aggravation of focal symptoms was associated with surgery. Control studies by CT and MRT provided evidence for no residual tumor tissue in all cases except one.
Ignition and extinction in the catalytic oxidation of hydrocarbons over platinum (1996)

Abstract The ignition–extinction behavior in the oxidation of methane, ethane, propane and isobutane, as well as of ethylene and propylene over a platinum‐foil catalyst was studied over the entire range of fuel/air ratios at atmospheric pressure. Ignition and extinction of the heterogeneous surface reaction, homogeneous ignition and the autothermal behavior of these fuel–air mixtures were investigated. The results show a common trend in the ignition extinction behavior of the alkanes and a different trend for the olefins. This is discussed in terms of a simple model, which correctly predicts the composition dependence of the surface ignition curve for reasonable values of parameters, indicating a mainly oxygen‐covered surface during ignition of the alkanes and a mainly hydrocarbon‐covered surface in the case of the olefins. Different branches of the complete bifurcation diagrams are discussed separately, allowing qualitative conclusions about the catalytic activity of Pt for the oxidation reactions of different fuels.
[Psychosocial stress and essential hypertension]. (1991)

A case-control study of 72 pairs indicated that stress events in daily life stimulative factor might induce the development of hypertension in susceptible persons. The sustained stress of tension and anxiety and passive mood of psychodefence could be the psychological factors inducing hypertension. Personality, as a mediated variable, has an important influence on the initiation and progress of hypertension.
Conditioning Multilayered Geologic Models to Well-Test and Production-Logging Data Using the Ensemble Kalman Filter (2010)

Abstract Reservoir models utilize highly heterogenous permeability and porosity fields embedded in a structural model derived from geophysical and geological data. It is not uncommon for permeabilities in the initial model derived from static data to differ significantly from values obtained from the interpretation of well-test data. This paper presents the application of the ensemble Kalman Filter (EnKF) to assimilate pressure transient and production-logging data to update permeabilities, estimate layer skin factors and "effective" well skin factor in multilayered reservoir models. The methodology is applied to two synthetic cases and a field case. For the field case application, we consider two approaches. In the first approach we simply use multipliers to adjust the heterogeneous permeability field in each layer. In the second approach, we adjust the prior mean of each layer log-permeability field together with individual gridblock log-permeabilities.
Topology of bonding in π-electron systems (1985)

Delocalization in conjugated π-electron systems is shown to be closely related to the topological concept of connectivity. A topological bond order is defined as a quantitative measure of the extent to which the subspace of a pair of adjacent atoms approximates a disconnected component of the molecular topological space. The agreement between this measure and molecular-orbital bond orders in the ordering of bond strengths within molecules is near perfect. There is also excellent quantitative agreement between these two measures of bond strength. Bond orders appear to be primarily determined by molecular topology. A new type of intramolecular equivalence relation between bonds, called “coresiduality,” emerges from the topological analysis. Two bonds are coresidual if the residues remaining when each pair of adjacent atoms is excised from the molecule are isomorphic. Coresidual bonds have equal bond orders. Coresiduality includes, but is more general than, equivalence due to symmetry.
College Students Reading to Preschoolers (1984)

It is not enough to expose future teachers and parents to good literature for children. It is important that they see young children reacting to books being read to them, an opportunity education majors get during preservice training. Non-education majors enrolled in my children's literature class were given, as an alternative to a traditional term paper, a chance to interact with preschoolers through the medium of books. Twenty-one students chose to participate in this project.
Summary Report: Systematic IPT Integration in Lean Development Programs (1997)

Integrated product development (IPD) has been established as a salient aspect of the lean enterprise paradigm. The drive towards IPD includes an impetus to organize around integrated product teams (IPTs), cross-functional groups responsible for developing a particular element of a system product. The use of IPTs has brought with it many issues, including those at the IPT interfaces. The goal of this research is to provide insight into the integration of multiple IPTs in programs.
Cancer in migrants to Australia: extending the descriptive epidemiological data. (1988)

Australia experienced a large influx of European migrants during the period 1950-1975. The descriptive epidemiological data on cancer rates within the major migrant groups, reviewed here, provide strong evidence of environmental and behavioral influences on the etiology of various cancers. The opportunity to extend the conventional type of data analysis, to include an examination of the effect of duration of residence upon cancer risk, provides further insight into cancer etiology. The possibilities of further exploring the descriptive data are also discussed, and both the desirability and the timeliness of mounting analytical studies of the Southern European migrants to Australia are emphasized.
Skin mini-erosion technique for monitoring metabolites in interstitial fluid: its feasibility demonstrated by OGTT results in diabetic and non-diabetic subjects (1999)

The aim of this study was to evaluate a new interstitial fluid (IF) sampling technique and its application in diabetology. IF and venous whole blood were sampled serially during an oral glucose tolerance test (OGTT) on days 1 and 3 after formation of a mini-erosion in eight non-diabetic controls and eight Type 2 diabetic subjects. Glucose, lactate, glycerol, 3-hydroxybutyrate and insulin were assayed in IF and plasma. With solitary exceptions, the IF sample volumes were in excess of those required for measurement of all five substances. However, mean IF sampling rates differed significantly both between the non-diabetic and diabetic groups and between days 1 and 3 (p < 0.001 in all cases). In both groups, the OGTT curves of glucose, glycerol and 3-hydroxybutyrate were similar to the respective curves for plasma, whereas for lactate concentrations they were markedly greater in IF than in plasma (40% and 93% in the control group and 57% and 100% greater in the diabetic group on days 1 and 3, respectively). The reverse was true of insulin concentrations in the non-diabetic group, which were 57% and 74% lower in IF than in plasma on days 1 and 3, respectively. In the non-diabetic group, the baseline (pre-OGTT) insulin level in IF increased from 49 +/- 22% (SD) of that in plasma on day 1 to 74 +/- 19% of that in plasma on day 3 (p=0.005). Sampling site re-epithelialization was rapid. In conclusion, the feasibility of transdermal sampling of IF via a skin mini-erosion has been demonstrated in both diabetic and non-diabetic subjects.
A novel parameter design method of dual-loop control strategy for grid-connected inverters with LCL filter (2009)

LCL filter is applied to reduce the high harmonic originated from grid-connected inverters, which could reduce value of inductance and improvement system dynamic performance. Account of the resonance problem of LCL filter, a current dual-loop control strategy is introduced. The current-mode dual-loop control strategy based on capacitor current loop which is chosen as the inner loop to damp the resonance. The implementation of this strategy is easy and the system performance is good. However, the tuning procedure is complex since the outer and inner controller can not cooperate well if the parameters of the controllers are not suitable and there is no one paper which provides a method to calculate the exact value of the two-current-loop controller's parameters. This paper proposed a pole assignment method based on deficient degreed of freedom (DOF). The design method is feasible and superior to traditional trial-and-error method. Finally experimental results verify the availability and correctness of the proposed method.
İLETİŞİM FAKÜLTELERİ VE SORUNLAR (2001)

İletişim Fakültelerinde öğrenci alımından mezuniyet sonrasına kadar bir dizi yanlış uygulamalar söz konusudur. Mesleki ve teknik ortaöğretimin bazı bölümlerinden mezun olanlar, eğer kendi alanları ile ilgili bir yükseköğretim programını tercih ediyorlarsa, ortaöğretim başarı puanları 0,5&#039;lik bir katsayı haricinde, 0,15&#039;lik ikinci bir ek çarpan daha uygulanarak, alanla ilgili yükseköğretim programlarına girişleri önemli ölçüde desteklenmektedir. Bu uygulamanın bazı çelişkiler içerdiği örneklerle açıklanacaktır. Çelişkilerin giderilmesi için ek puan verilebilecek mesleki ve teknik ortaöğretim programlarının neler olabileceği, ayrıca Anadolu İletişim ve Basın Yayın Meslek Liselerindeki alan öğretmeni açığının kapatılabilmesi için çözüm önerileri sunulacaktır. İletişim fakültesi ders müfredatlarının gelişen teknolojiye paralel olarak güncelleştirilmesi, ÖSS&#039;de sözel puan türü yerine EA ile öğrenci alınmasının faydaları, mezunlarının istihdam alanlarının nasıl arttırılabileceği bu çalışmanın konularını içermektedir.
Dedicated module access in dynamically reconfigurable systems (2006)

Modern FPGAs, such as the Xilinx Virtex-II series, offer the feature of partial and dynamic reconfiguration, allowing to load various hardware configurations (i.e., HW modules) during run-time. To enable communication with these modules and for controlling purposes, dedicated access to each module as well as dedicated signals to control the global communication are required. This paper discusses several ways of implementing dedicated signals and addresses the impact on dynamically reconfigurable systems. Two new approaches are introduced, which allow a permanent access to the modules and to the communication infrastructure even during reconfiguration.
Continuing controversy on the falling rate of profit: fixed capital and other issues (1979)

Journal Article Continuing controversy on the falling rate of profit: fixed capital and other issues Get access John E. Roemer John E. Roemer Search for other works by this author on: Oxford Academic Google Scholar Cambridge Journal of Economics, Volume 3, Issue 4, December 1979, Pages 379–398, https://doi.org/10.1093/oxfordjournals.cje.a035430 Published: 01 December 1979
Unit treatment processes in water and wastewater engineering (1997)

Elements of Water Science Settling Characteristics of Suspensions Destabilization of Colloidal Suspensions Separation of Suspended Solids by Sedimentation Processes Separation of Suspended Solids by Flotation Processes Separation of Suspended Solids by Sand Filtration Processes Classification of Dissolved Solids Absorption Chemical Precipitation Ion Exchange Membrane Filtration Processes Biological Processes The Activated Sludge Process Aerobic Biofilters Gas-Liquid Transfer Anaerobic Processes Sludge Processing and Disposal Disinfection Fluoridation of Water Supplies.
Hierarchical Editing and Rendering of Subdivision Surfaces (1997)

We describe a system for hierarchical editing of subdivision surfaces based on direct manipulation of control points on the surface. As an improvement over spline-based hierarchical editing, our system is capable of naturally designing piecewise smooth surfaces over arbitrary topological types. Our system is able to naturally model sharp features, and eases the burden of understanding the math when compared to spline-based systems. Because fast display is crucial for interactive editing, we also describe algorithms for efficiently displaying the resulting surface. 1 Introduction 1.1 Motivation We intend to provide an editing system that allows the user to quickly design free-form shapes of any detail, without his needing to worry about mathematical esoterica of continuity, parametrization, or topology. Previous methods of hierarchical editing based on refinement rules of B-spline control vertices [4] or wavelets [3] have proven themselves well suited for editing complex detail on a s...
Phase behavior of ether lipids from Clostridium butyricum (1981)

Ether lipids have been isolated from the phospholipid fraction of Clostridium butyricum IFO 3852 cells which had been grown in media devoid of biotin with added elaidic acid or oleic acid. The plasmalogen form of phosphatidylethanolamine (plasmenylethanolamine) from elaidate-grown cells was highly enriched with 18:1 in both the alk-1-enyl and acyl chains. A transition from the gel to liquid-crystalline state, with a peak maximum (Tm) at 33 degrees C and enthalpy delta H = 5.7 kcal/mol, was observed by differential scanning calorimetry. With the fluorescent probes cis- and trans-parinaric acids, transitions were observed at 33 degrees C on heating and at 29 degrees C on cooling. These transition temperatures are 5-6 degrees C lower than those reported for the corresponding diacyl lipid, dielaidoylphosphatidylethanolamine. A similar study of the phase behavior of both the elaidate-enriched and oleate-enriched glycerol acetal derivative of plasmenylethanolamine from C. butyricum revealed a large hysteresis of 12.5-16 degrees C. Hysteresis in the polar head group motion was also observed by 31P nuclear magnetic resonance. The elaidate-enriched lipid, which melted between 28 and 33 degrees C, appears to undergo supercooling prior to the transition to the gel state at about 18-13 degrees C, depending on the scanning rate. The formation of a more ordered gel state relative to plasmenylethanolamine was indicated by a 2-fold increase in delta H. Electron microscopy revealed a marked reorganization from typical multilamellar liposomes above Tm to large needle-like structures below Tm. The oleate-enriched glycerol acetal lipid formed the gel phase at -4 degrees C, which is 10 degrees C above the transition temperature reported for dioleoylphosphatidylethanolamine. Stabilization of oleate-enriched glycerol acetal lipid bilayers may result from hydrogen bonding between polar head groups. The relationship of the phase behavior of the ether lipids to the lipid composition and phase behavior of C. butyricum membranes is discussed.
Degradation of the Fluoroquinolone Enrofloxacin by the Brown Rot Fungus <i>Gloeophyllum striatum</i> : Identification of Metabolites (1998)

The degradation of enrofloxacin, a fluoroquinolone antibacterial drug used in veterinary medicine, was investigated with the brown rot fungus Gloeophyllum striatum. After 8 weeks, mycelia suspended in a defined liquid medium had produced 27.3, 18.5, and 6.7% 14CO2 from [14C]enrofloxacin labeled either at position C-2, at position C-4, or in the piperazinyl moiety, respectively. Enrofloxacin, applied at 10 ppm, was transformed into metabolites already after about 1 week. The most stable intermediates present in 2-day-old supernatants were analyzed by high-performance liquid chromatography combined with electrospray ionization mass spectrometry. Eight of 11 proposed molecular structures could be confirmed by 1H nuclear magnetic resonance spectroscopy or by cochromatography with reference compounds. We identified (i) 3-, 6-, and 8-hydroxylated congeners of enrofloxacin, which have no or only very little residual antibacterial activity; (ii) 5,6- (or 6,8-), 5,8-, and 7,8-dihydroxylated congeners, which were prone to autoxidative transformation; (iii) an isatin-type compound as well as an anthranilic acid derivative, directly demonstrating cleavage of the heterocyclic core of enrofloxacin; and (iv) 1-ethylpiperazine, the 7-amino congener, and desethylene-enrofloxacin, representing both elimination and degradation of the piperazinyl moiety. The pattern of metabolites implies four principle routes of degradation which might be simultaneously employed. Each route, initiated by either oxidative decarboxylation, defluorination, hydroxylation at C-8, or oxidation of the piperazinyl moiety, may reflect an initial attack by hydroxyl radicals at a different site of the drug. During chemical degradation of [4-14C]enrofloxacin with Fenton's reagent, five confirmatory metabolites, contained in groups i and iv, were identified. These findings provide new evidence in support of the hypothesis that brown rot fungi may be capable of producing hydroxyl radicals, which could be utilized to degrade wood and certain xenobiotics.
Inhibitors of Acetylcholinesterase and Butyrylcholinesterase Meet Immunity (2014)

Acetylcholinesterase (AChE) inhibitors are widely used for the symptomatic treatment of Alzheimer's disease and other dementias. More recent use is for myasthenia gravis. Many of these inhibitors interact with the second known cholinesterase, butyrylcholinesterase (BChE). Further, evidence shows that acetylcholine plays a role in suppression of cytokine release through a "cholinergic anti-inflammatory pathway" which raises questions about the role of these inhibitors in the immune system. This review covers research and discussion of the role of the inhibitors in modulating the immune response using as examples the commonly available drugs, donepezil, galantamine, huperzine, neostigmine and pyridostigmine. Major attention is given to the cholinergic anti-inflammatory pathway, a well-described link between the central nervous system and terminal effector cells in the immune system.
Variable-frequency pulse-width-modulation for zero-voltage switching in a boost DC-DC regulator (1990)

A technique for operating a pulse-width-modulated (PWM) dc-dc regulator in the boost mode while switching the MOSFET when the drain-to-source potential is near zero volts was developed and is described in this thesis. This is accomplished by using frequency-modulation in addition to pulse-width-modulation. Zero-voltage switching will provide power converter designers an alternative for designing high-frequency converters with minimal transient turn-on losses, the predominant form of converter losses experienced in high frequency operation. High frequency operation will result in smaller reactive components, which produce higher power density converters, as well as increasing the transient response of the regulated converter. In addition to allowing for high frequency operation, the design exhibits many desirable power switch properties, such as limiting the peak voltage to the output voltage level and operating with the minimum possible current levels for a given power requirement. A circuit built and tested utilizing zero-voltage switching in a regulated boost converter verified the principles of operation for yielding a high-efficiency, high-frequency converter.
Some experiments with peltier effect (1951)

The Peltier effect has long been neglected by electrical engineers. Lately, however, experiments have been made on new alloys to determine the practicability of using the Peltier effect in a thermoelectric power generator.