gebhart/patrepeval huggingface dataset:
Improved privacy of dynamic group services (2017)

We consider dynamic group services, where outputs based on small samples of privacy-sensitive user inputs are repetitively computed. The leakage of user input data is analysed, caused by producing multiple outputs, resulting from inputs of frequently changing sets of users. A cryptographic technique, known as random user selection, is investigated. We show the effect of random user selection, given different types of output functions, thereby disproving earlier work. A new security measure is introduced, which provably improves the privacy-preserving effect of random user selection, irrespective of the output function. We show how this new security measure can be implemented in existing cryptographic protocols. To investigate the effectiveness of our security measure, we conducted a couple of statistical simulations with large user populations, which show that it forms a key ingredient, at least for the output function addition. Without it, an adversary is able to determine a user input, with increasing accuracy when more outputs become available. When the security measure is implemented, an adversary remains oblivious of user inputs, even when thousands of outputs are collected. Therefore, our new security measure assures that random user selection is an effective way of protecting the privacy of dynamic group services.
Fluorenone Polymers and Fibers (1984)

Fluorenone polymers as typified by bisphenol fluorenone copolyester of terephthalic and isophthalic acids have many outstanding properties, e.g., heat resistance and high glass transition temperature. They do not generate HCN during burning since the polymer structure does not contain nitrogen and this is a potential advantage in fire-resistant fiber applications. Fluorenone polyesters can be toughened with minor percentages of ethylene/vinyl acetate/vinyl alcohol terpolymer. Potentially they also can be toughened with small amounts of an acetylene terminated bifunctional monomer of fluorenone which can react at high temperatures to form an improved thermally stable product.
Three Dimensional Shape Modeling: Segmentation, Reconstruction and Registration (2002)

Accounting for uncertainty in three-dimensional (3D) shapes is important in a large number of scientific and engineering areas, such as biometrics, biomedical imaging, and data mining. It is well known that 3D polar shaped objects can be represented by Fourier descriptors such as spherical harmonics and double Fourier series. However, the statistics of these spectral shape models have not been widely explored. This thesis studies several areas involved in 3D shape modeling, including random field models for statistical shape modeling, optimal shape filtering, parametric active contours for object segmentation and surface reconstruction. It also investigates multi-modal image registration with respect to tumor activity quantification. Spherical harmonic extensions over...
Telemedical System "Pulmotel-2010" for Monitoring Patients with Chronic Pulmonary Diseases (2010)

Telemedicine is one of the most innovative and promising applications of technology in contemporary medicine. Telemedical systems, a sort of distributed measurement systems, are used for continuous or periodic monitoring of human vital signals in the environment of living. This approach has several advantages in comparison to traditional medical care: e.g. patients experience fewer hospitalizations, emergency room visits, lost time from work, the costs of treatment are reduced, and the quality of life is improved. Currently, chronic respiratory diseases comprise one of the most serious public health problems. Simultaneously patients suffering from these diseases are well suitable for home monitoring. This paper describes the design and technical realization of a telemedical system that has been developed as a platform suitable for monitoring patients with chronic pulmonary diseases and fitted to Polish conditions. The paper focuses on the system's architecture, included medical tests, adopted hardware and software, and preliminary internal evaluation. The performed tests demonstrated good overall performance of the system. At present further work goes on to put it into practice.
Modeling and Design for Low Power and Variation Tolerance in Integrated Circuits (2017)

Modern integrated circuits (ICs) ranging from ultra-low power (ULP) internet-of-things (IoT) devices to high-performance (HP) processors, cater to a wide spectrum of applications and notably aid in revolutionizing human life-style. To cite a few instances, wearable technology is a ubiquitous IoT application that has made great strides in the health-care and fitness domain, HP chips such as graphics processing units enable an efficient computation platform for various scientific applications, etc. However, together with an ever-increasing scope of applications that ICs like these can support, they are also faced with a multitude of design challenges. In this work, we aim to address two such design challenges namely power consumption and tolerance to circuit or environmental variations. Low-power operation is a crucial requirement in modern IC design. In self or battery-powered IoT devices that are required to have a long lifetime, ULP design is of utmost importance due to limited battery capacities and efficiency of current energy harvesting technologies. In the HP domain, low power is necessary in portable devices such as tablets and laptops, and to reduce the need for heat-sinks to cool thermal hot-spots in processors. Tolerance to the effects of process and environmental variations are also crucial to both ULP and HP designs. In ULP designs, a critical obstacle to lowering the supply voltage to reduce power, is the increased sensitivity of circuits to process, voltage, and temperature variations. These variations affect circuit delays and limit product yield. Similarly, in HP designs, performance can be degraded due to workload variations that can cause power supply noise and temperature gradients. Toward the above goals of lowering power and tolerating variations, we explore design techniques for self-powered, IoT chips that provide a flexible platform capable of gathering, processing, and transmitting data. We specifically target reliable and ULP circuits for data and clocking. We build a modeling framework to enable variation tolerance analysis of ULP and HP ICs. In the ULP domain, we analyze the potential of a post-silicon hold time closure technique to overcome the impact of variations in digital circuits. In the HP domain, we analyze the potential of a fine-grained GALS scheme to overcome the effects of power supply noise. We also present designs of a temperature sensor and a supply voltage monitor, which are crucial to enabling variation tolerance in ULP chips. Finally, we delve into a tool-flow to make the design of variation tolerant digital components feasible.
A Simple Method for the Synthesis of Silicon Carbide Nanorods (2002)

SiC nanorods were synthesized by a reaction at a temperature of 1200 degrees C, under an argon gas atmosphere, from silicon and amorphous carbon powders mixed by ball milling. The reaction product, which contain SiC nanorods and nanoparticles, has been characterized by high-resolution transmission electron microscopy, X-ray diffraction, and micro-Raman spectroscopy. The synthesized nanorods are more than 1 micron long with a mean diameter of about 10-30 nm. The nanorods possess a well-defined crystalline structure with a thin layer of amorphous SiO2 on the surface. Raman shifts of SiC nanorods and the role of structural defects are discussed.
Organizational strategies to address stakeholder relationships: a customer portal perspective (2004)

The purpose of this study is to understand how portals impact stakeholder relationships within the electronic business environment. The study extends the understanding of information systems through the application of portals as critical stakeholder communication and information channels. 
The research questions were derived from the literature in the areas of organizational strategy, Internet driven strategies, strategic uses of information systems, as well as stakeholder and portal strategies. The seven primary research questions addressed the areas of strategy, organization and portals. 
Strategies - How do organizations address stakeholders? (1) What are the strategies for creating customer value? (2) How are customer relationships managed? 
Organization - What does the organization adapt? (3) How do organizations design their organizational/administrative infrastructure to address customers? (4) How do the organizations design their technological infrastructure to address customers? 
Portals - What is the role of portals? (5) What portal models are appropriate for addressing customers? (6) What customer attributes affect portal strategies? (7) How do organizations use portals to respond to particular customers? 
The investigation was carried out using a multiple case study methodology. Eight companies were studied with the exploratory information for four of the companies coming primarily from published data (Amazon, Barnes & Noble, Cisco, and Dell) and the confirmatory information for the remaining companies coming primarily from interviews (Lowe's, NetBank, SAIC, and WC Bradley Company). Individual cases were created and analyzed for each company. To aid in the selection and analysis of the companies a focus format matrix was utilized. This focus format matrix placed each company in one of four quadrants based on the company's focus (consumer or business) as well the business focus (e-commerce or multichannel). 
The findings of this study suggest that companies are utilizing portals, and portal technologies, in unique ways to address customers directly. Portals appear to enhance a company's ability to be customer-centric and augment the overall customer experience. Portals also enable the organization's information system strategy to become better aligned with the organization's strategy.
Polycaprolactone Scaffolds Fabricated with an Advanced Electrohydrodynamic Direct-Printing Method for Bone Tissue Regeneration (2011)

Electrohydrodynamic (EHD) direct writing has been used in diverse microelectromechanical systems and various supplemental methods for biotechnology and electronics. In this work, we expanded the use of EHD-induced direct writing to fabricate 3D biomedical scaffolds designed as porous structures for bone tissue engineering. To prepare the scaffolds, we modified a grounded target used in conventional EHD direct printing using a poly(ethylene oxide) solution bath, elastically cushioning the plotted struts to prevent crumbling. The fabricated scaffolds were assessed for not only physical properties including surface roughness and water uptake ability but also biological capabilities by culturing osteoblast-like cells (MG63) for the EHD-plotted polycaprolactone (PCL) scaffold. The EHD-scaffolds showed significantly roughened surface and enhanced water-absorption ability (400% increase) compared with the pure rapid-prototyped PCL. The results of cell viability, alkaline phosphatase activity, and mineralization analyses showed significantly enhanced biological properties of the scaffold (20 times the cell viability and 6 times the mineralization) compared with the scaffolds fabricated using RP technology. Because of the results, the modified EHD direct-writing process can be a promising method for fabricating 3D biomedical scaffolds in tissue engineering.
Variation of the partition coefficient of phase-partitioning compounds between hydrocarbon and aqueous phases: an experimental study (2021)

Many non-ionic chemical compounds will form real solutions in equilibrium between two immiscible phases in contact. The partition coefficient (K) is defined as the quotient between the equilibrium concentration of the substance in the hydrocarbon and the aqueous phase. The reversible partition of a compound between hydrocarbon and aqueous phases is the basis of the partitioning inter-well tracer test (PITT). PITTs are of high interest for the characterization of oil reservoirs, in hydrogeology for assessment of the contamination of soils by non-aqueous phase liquids (NAPLs), and in process technology. The K value of substance is influenced by the actual chemical and physical conditions of the system where it will be used as phase-partitioning tracer. Thus, it is important to evaluate the extent of variation that the K value can exhibit under different relevant conditions. In the present document, we report the methodology and findings from the experimental determination of the K values of 4-methoxybenzyl alcohol, 3,4-dimethoxybenzyl alcohol, 4-chlorobenzyl alcohol, 2,6-dichlorobenzyl alcohol, pyridine, 2,3-dimethylpyrazine and 2,6-dimethylpyrazine between different hydrocarbon and aqueous phases. These 7 compounds were previously identified as interesting PITT tracer candidates. Individual K-values were determined under different temperatures, compositions of the hydrocarbon phase (synthetic mixtures of toluene, isooctane, and 1-octanol and 5 real crude oils), and different ionic strengths (I) and ionic compositions of the aqueous phase. The reversibility of the partitioning phenomena was also evaluated. The composition of the hydrocarbon phase and the ionic strength of the water phase were found to influence the K values of all seven compounds. Results suggest that the substitution of monovalent ions with divalent ions in the aqueous phase, keeping the ionic strength constant, does not influence the K values. Temperature effects on the K-values are always visible for 3,4-dimethoxybenzyl alcohol, 2,6-dichlorobenzyl alcohol, pyridine, 2,3-dimethylpyrazine and 2,6-dimethylpyrazine. Dependent on the hydrocarbon phase composition, temperature also influences the K-values for 4-methoxybenzyl alcohol and 4-chlorobenzyl alcohol.
Exocyst Sec5 Regulates Exocytosis of Newcomer Insulin Granules Underlying Biphasic Insulin Secretion (2013)

The exocyst complex subunit Sec5 is a downstream effector of RalA-GTPase which promotes RalA-exocyst interactions and exocyst assembly, serving to tether secretory granules to docking sites on the plasma membrane. We recently reported that RalA regulates biphasic insulin secretion in pancreatic islet β cells in part by tethering insulin secretory granules to Ca(2+) channels to assist excitosome assembly. Here, we assessed β cell exocytosis by patch clamp membrane capacitance measurement and total internal reflection fluorescence microscopy to investigate the role of Sec5 in regulating insulin secretion. Sec5 is present in human and rodent islet β cells, localized to insulin granules. Sec5 protein depletion in rat INS-1 cells inhibited depolarization-induced release of primed insulin granules from both readily-releasable pool and mobilization from the reserve pool. This reduction in insulin exocytosis was attributed mainly to reduction in recruitment and exocytosis of newcomer insulin granules that undergo minimal docking time at the plasma membrane, but which encompassed a larger portion of biphasic glucose stimulated insulin secretion. Sec5 protein knockdown had little effect on predocked granules, unless vigorously stimulated by KCl depolarization. Taken together, newcomer insulin granules in β cells are more sensitive than predocked granules to Sec5 regulation.
Ultra-narrow linewidth, stable and tunable laser source for optical communication systems and spectroscopy (2014)

A novel ultra-narrow linewidth, stable and tunable single-line laser source is demonstrated and experimentally performed. The single spectral line laser is achieved by selecting and amplifying one spectral comb line of a femtosecond-fiber laser via polarization pulling assisted stimulated Brillouin scattering. Stabilization and tuning is performed by additional modulation. First proof of concept results show possible linewidths below 1 Hz and an SNR of 47 dB with a tunability of more than 100 nm and a relative stability of ±160 mHz over 5 h. Such a laser source gives high potential for many different applications like spectroscopy and optical communications.
Lung Volume Reduction Surgery (1996)

Lung volume reduction surgery can predictably improve objective and subjective pulmonary function in selected patients with end-stage emphysema with low morbidity and mortality. Careful patient selection, accurate preoperative localization of diseased target areas, skilled anesthetic technique, meticulous operative approach, and intense postoperative support are essential to achieve favorable results.
Color distribution from multicolor LED arrays (2007)

We describe a fully-analytical, simple yet sufficiently accurate method to compute the color pattern of the light emitted from multicolor light-emitting diode (LED) assemblies. Spatial distributions for both color variation and correlated color temperature (CCT) as a function of typical parameters of influence, such as LED spectrum, spatial distribution of LED radiation, target distance, LED-to-LED spacing, and number of LEDs, are shown. To illustrate the method, we simulate and analyze the color patterns of linear, ring, and square RGB (red, green, and blue) arrays for Lambertian-type, batwing, and side emitting LEDs. Our theory may be useful to choose the optimal value for both the array configuration and the array-diffuser distance for lighting systems with color mixing devices.
Collagen XVI induces formation of focal contacts on intestinal myofibroblasts isolated from the normal and inflamed intestinal tract (2009)

In Crohn's disease (CD) the stress-shield of intestinal subepithelial myofibroblasts (ISEMF) provided by intact tissue is disturbed due to inflammation and thus, cells start with remodelling activities. This is characterized by increased numbers of collagen-producing ISEMF causing an uncontrolled, irreversible wound-healing response to the chronic inflammation of the gastrointestinal tract. Reconstitution of the original ECM leads ISEMF to exit this cycle. In contrast, during fibrosis, ISEMF persist. It is known that ISEMF produce and deposit collagen types I, III, IV and V; however synthesis and the role of fibrillar peripheral molecules like collagen type XVI have not been addressed yet. Here, we have analyzed the distribution of collagen XVI in the normal and inflamed bowel wall, its gene and protein expression by ISEMF of different inflammation stages, the cell-matrix interactions in different phases of the inflammatory process and their effect on cell spreading, proliferation and migration. Collagen XVI is deposited in the submucosa of the intestinal wall where it co-localizes with fibrillin-1 and integrin alpha1. ISEMF reveal increasing gene and protein expression of collagen XVI concurrent to increasing inflammation. ISEMF reveal more mature focal adhesion contacts when seeded on collagen XVI resulting in an extensive cell spreading. This involves recruitment of alpha1beta1 integrin, which shows increased cell surface expression on ISEMF in late stages of inflammation. We assume that collagen XVI promotes persistence of ISEMF in the normal and, even stronger in the inflamed bowel wall by stabilizing focal adhesion contacts via cell-matrix interaction preferentially through recruitment of alpha1ss1 integrin into the tips of the focal adhesion contacts.
Silent stores for free (2000)

Silent store instructions write values that exactly match the values that are already stored at the memory address that is being written. A recent study reveals that significant benefits can be gained by detecting and removing such stores from a program's execution. This paper studies the problem of detecting silent stores and shows that an average of 31% and 50% of silent stores can be detected for very low implementation cost, by exploiting temporal and spatial locality in a processor's load and store queues. We also show that over 83% of all silent stores can be detected using idle cache read access ports. Furthermore, we show that processors that use standard error-correction codes to protect data caches from transient errors can be modified only slightly to detect 100% of silent stores that hit in the cache. Finally, we show that silent store detection via these methods can result in a 11% harmonic mean performance improvement in a two-level store-through on-chip cache hierarchy that is based on a real microprocessor design.
Detection of Cognitive Interference in Wireless Environments: An IQ Test in the Air (2013)

Cognitive interference, which can adapt its strategy to the states of the environment and legitimate system, is a serious threat to wireless communication systems or even more general systems such as smart grids. The interferer can also disguise itself behind the randomness of the environment, which makes the legitimate system difficult detect the interference. An intelligence detection approach is proposed in this paper, which claims a cognitive interference when the hint of intelligence in the environment against the legitimate system is captured. The mutual information between the legitimate system and the environment is used as the metric measuring the intelligence. Two approaches are proposed to compute the metric in an online manner, namely the k-nearest neighbor algorithm and Gaussian approximation. Numerical simulations in the scenario of cognitive interference against cognitive radio networks demonstrate that the proposed mechanism can effectively detect the cognitive interference.
Low-power wireless advertising software library for distributed M2M and contextual IoT (2015)

Bluetooth Smart is emerging as arguably the first global low-power wireless standard for the Internet of Things, bringing with it billions of devices, or “Things”, capable of spontaneously broadcasting short messages to any potential receiving devices in range. If a widespread infrastructure of such receiving devices were to exist, these broadcast messages could be reliably captured, parsed, and forwarded in IP packets via the Internet to any and all concerned parties, enabling connectionless, distributed low-power M2M networks. In this paper we present advlib, a software library for parsing low-power wireless broadcast (also known as advertising) packets, with this objective. Experimental results indicate that, coupled with the necessary receiver infrastructure, in many cases at least the device vendor can be identified, validating the potential for M2M forwarding. Moreover, results suggest that sufficient semantically-meaningful information may be extracted by the library to support contextual IoT applications even at a local scale. Development continues on extending the support of known protocols and establishing the necessary relationships with device vendors.
Low Head Pico Hydro Turbine Selection using a Multi-Criteria Analysis (2011)

This paper presents the optimization of the consumption and production rates of a steam reforming plant using natural gas as raw material for generating hydrogen as principal product.Different strategies are applied to select the most adequate techniques and to obtain different configurations or alternatives for the process.The methodology used in this work includes both quantitative and qualitative analyses.The aim of this work is to apply various possible alternatives to control emissions and reduce energy inputs, according to the recommendations of the European IPPC Bureau and the United Nations Framework Convention on Climate Change.The actions are oriented towards reducing the consumption of the plant by improving process heat recovery and improving energy integration.The results will be focused on the energy consumption analysis for the different alternatives, showing the best option to design the plant, maximizing production and optimizing energy use.This approach produces large amounts of hydrogen, decreases environmental impacts and increases economical profits.