gebhart/patrepeval huggingface dataset:
ACORN: An Auto-Configuration Framework for 802.11n WLANs (2012)

The wide channels feature combines two adjacent channels to form a new, wider channel to facilitate high-data-rate transmissions in multiple-input-multiple-output (MIMO)-based IEEE 802.11n networks. Using a wider channel can exacerbate interference effects. Furthermore, contrary to what has been reported by prior studies, we find that wide channels do not always provide benefits in isolation (i.e., one link without interference) and can even degrade performance. We conduct an in-depth, experimental study to understand the implications of wide channels on throughput performance. Based on our measurements, we design an auto-configuration framework called ACORN for enterprise 802.11n WLANs. ACORN integrates the functions of user association and channel allocation since our study reveals that they are tightly coupled when wide channels are used. We show that the channel allocation problem with the constraints of wide channels is NP-complete. Thus, ACORN uses an algorithm that provides a worst-case approximation ratio of O(1/Δ + 1), with Δ being the maximum node degree in the network. We implement ACORN on our 802.11n testbed. Our evaluations show that ACORN: 1) outperforms previous approaches that are agnostic to wide channels constraints; it provides per-AP throughput gains ranging from 1.5 × 6×; and 2) in practice, its channel allocation module achieves an approximation ratio much better than the theoretically predicted O(1/Δ + 1).
Investigation of broadband electromagnetic induction scattering by highly conductive, permeable, arbitrarily shaped 3-D objects (2004)

Operating as low as tens of hertz and as high as hundreds of kilohertz, new broadband electromagnetic induction (EMI) sensors have shown promise for classification of unseen buried metallic objects. The three-dimensional (3-D) and bodies-of-revolution (BOR) numerical studies reported here are designed to explain key scattering sensitivities that may either be useful in or may limit object classification capability. The target is excited either by a spatially uniform oscillating primary magnetic field or by the oscillating field from a loop antenna. The problem is formulated in terms of Poison's equation for scalar potential outside the object, where conductivity and electric field values are low and consequent conduction currents are generally negligible. The Helmholtz equation for vector potential applies inside the highly conducting and permeable object. In both regions, the electromagnetic phenomena of interest are magneto-quasi-static (MQS). The simulation algorithm uses the method of auxiliary sources (MAS), with auxiliary magnetic charges and auxiliary magnetic current elements distributed on auxiliary surfaces. These surfaces generally conform to but do not coincide with physical surfaces, providing extraordinarily efficient and accurate 3-D solutions. Comparisons to available analytical solutions and experimental data validate the solutions. The simulations and data illuminate broadband MQS scattering phenomenology for both magnetic and nonmagnetic metallic objects. Distinctive sensitivities are shown and signature effects analyzed relative to the scatterer's shape and aspect ratio, orientation, sharp points and edges, finite wall thickness in hollow bodies, and compound structure in which a geometrically complex body consists of a number of distinct sections, e.g., fins.
A novel matrix metalloprotease-like enzyme (karilysin) of the periodontal pathogen Tannerella forsythia ATCC 43037 (2009)

Proteases of Tannerella forsythia, a pathogen associated with periodontal disease, are implicated as virulence factors. Here, we characterized a matrix metalloprotease (MMP)-like enzyme of T. forsythia referred to as karilysin. Full-length (without a signal peptide) recombinant karilysin (49.9 kDa) processed itself into the mature 18-kDa enzyme through sequential autoproteolytic cleavage at both N- and C-terminal profragments. The first cleavage at the Asn14-Tyr15 peptide bond generated the fully active enzyme (47.9 kDa) and subsequent truncations at the C-terminus did not affect proteolytic activity. Mutation of Tyr15 to Ala generated a prokarilysin variant that processed itself into the final 18-kDa form with greatly reduced kinetics. Inactive prokarilysin with the mutated catalytic Glu residue (E136A) was processed by active karilysin at the same sites as the active enzymes. Karilysin proteolytic activity and autoprocessing were inhibited by 1,10-phenanthroline and EDTA. Calcium ions were found to be important for both the activity and thermal stability of karilysin. Using CLiPS technology, the specificity of karilysin was found to be similar to that of MMPs with preference for Leu/Tyr/Met at P1' and Pro/Ala at P3. This specificity and the ability to degrade elastin, fibrinogen and fibronectin may contribute to the pathogenicity of periodontitis.
Vibrational and electronic spectra of tetrasulfatodiplatinate(2-) complexes (1991)

The vibrational and electronic spectra of axially ligated sulfate-bridged binuclear platinum complexes ([Pt2(SO4)4L2]n-: L = OH2, DMSO, n = 2; L = Cl, Br, n = 4) have been studied. Raman spectra acquired with near-UV excitation show bands assigned to Pt-O(sulfate) stretching (300-350-cm-1 region) for all complexes, while bands assigned to Pt-Pt and Pt-L stretching are seen for complexes (L = Cl, Br) that display preresonance Raman scattering within intense near-UV absorption bands assigned to the σ(L) → σ*(Pt2) electronic transition. Weaker electronic absorptions are assigned as metal-metal 1(σ→σ*) (near 220 nm for L = OH2, Cl) and dπ → dσ*(Pt2) (350-500 nm). Single-crystal polarized absorption spectra (L = OH2, DMSO) show that the weak absorption system in the 350-500-nm region consists of three x,y-polarized (metal-metal axis) bands and an x,y-polarized band. The L = OH2, Cl complexes show weak emission bands in the 695-750-nm region when excited at 77 K with near-UV light. These emission bands are similar to those observed for [Pt2(HPO4)4L2]n- (L = OH2, n = 2; L = Cl, n = 4) complexes. The emission lifetimes for the sulfate-bridged complexes (450 ± 50 ns, L = OH2; 290 ± 20 ns, L = Cl) are much shorter, and the emission intensities are much weaker, than the corresponding properties of the phosphate-bridged complexes. © 1991 American Chemical Society.
Three-Dimensional Analysis of Syncytial-Type Cell Plates during Endosperm Cellularization Visualized by High Resolution Electron Tomography (2001)

Marisa S. Otegui, David N. Mastronarde, Byung-Ho Kang, Sebastian Y. Bednarek, L. Andrew Staehelin, Three-Dimensional Analysis of Syncytial-Type Cell Plates during Endosperm Cellularization Visualized by High Resolution Electron Tomography, The Plant Cell, Vol. 13, No. 9 (Sep., 2001), pp. 2033-2051
Improving Passenger Comfort by Exploiting Hub Motors in Electric Vehicles: Suspension Modeling (2020)

Abstract This paper examines using electric vehicles with independently actuated wheels and anti-squat/lift/dive suspensions to improve passenger comfort by reducing the lift, pitch, and roll motion of the vehicle chassis. Anti-squat/lift/dive suspensions use an angled suspension bar to transfer a portion of the longitudinal driving force into a vertical reaction force on the chassis. Using this effect, we derive a control-oriented model of the lift, pitch, and roll of the chassis where the steering angle and the four driving forces of the individual wheels are the control inputs and the road-height is a disturbance. The model is simplified under the assumption that the suspension deflections are small during normal, comfortable driving. Finally, we use steady-state analysis and open-loop simulations to provide intuition about the relationship between the driving forces and the chassis motions.
Using Dynamics of Eye Movements, Speech Articulation and Brain Activity to Predict and Track mTBI Screening Outcomes (2021)

Repeated subconcussive blows to the head during sports or other contact activities may have a cumulative and long lasting effect on cognitive functioning. Unobtrusive measurement and tracking of cognitive functioning is needed to enable preventative interventions for people at elevated risk of concussive injury. The focus of the present study is to investigate the potential for using passive measurements of fine motor movements (smooth pursuit eye tracking and read speech) and resting state brain activity (measured using fMRI) to complement existing diagnostic tools, such as the Immediate Post-concussion Assessment and Cognitive Testing (ImPACT), that are used for this purpose. Thirty-one high school American football and soccer athletes were tracked through the course of a sports season. Hypotheses were that (1) measures of complexity of fine motor coordination and of resting state brain activity are predictive of cognitive functioning measured by the ImPACT test, and (2) within-subject changes in these measures over the course of a sports season are predictive of changes in ImPACT scores. The first principal component of the six ImPACT composite scores was used as a latent factor that represents cognitive functioning. This latent factor was positively correlated with four of the ImPACT composites: verbal memory, visual memory, visual motor speed and reaction speed. Strong correlations, ranging between <i>r</i> = 0.26 and <i>r</i> = 0.49, were found between this latent factor and complexity features derived from each sensor modality. Based on a regression model, the complexity features were combined across sensor modalities and used to predict the latent factor on out-of-sample subjects. The predictions correlated with the true latent factor with <i>r</i> = 0.71. Within-subject changes over time were predicted with <i>r</i> = 0.34. These results indicate the potential to predict cognitive performance from passive monitoring of fine motor movements and brain activity, offering initial support for future application in detection of performance deficits associated with subconcussive events.
A Nonlinear Compensator for Zero-Power Control and Its Application to Vibration Isolation System (2005)

PROCEEDINGS PAPER A Nonlinear Compensator for Zero-Power Control and Its Application to Vibration Isolation System Md. Emdadul Hoque, Md. Emdadul Hoque Saitama University, Saitama, Japan Search for other works by this author on: This Site PubMed Google Scholar Tetsuro Kamiya, Tetsuro Kamiya Saitama University, Saitama, Japan Search for other works by this author on: This Site PubMed Google Scholar Takeshi Mizuno Takeshi Mizuno Saitama University, Saitama, Japan Search for other works by this author on: This Site PubMed Google Scholar Author Information Md. Emdadul Hoque Saitama University, Saitama, Japan Tetsuro Kamiya Saitama University, Saitama, Japan Takeshi Mizuno Saitama University, Saitama, Japan Paper No: DETC2005-85175, pp. 223-228; 6 pages https://doi.org/10.1115/DETC2005-85175 Published Online: June 11, 2008
Applied Industrial Augmented Reality (2017)

The goal of our project was to create an application that demonstrates the usefulness of augmented reality within an industrial context. In order to align our project goals with those of our sponsor, Newport News Shipbuilding, we created an augmented reality application to supplement a chainsaw’s instruction manual. Using an instruction manual for a Stihl MS361 chainsaw, we adapted the material into a digital context. In the application, we included step-by-step instructions for starting the chainsaw and changing the chain. In addition, we included an augmented part identification mode, where the user can identify parts of the chainsaw by touching them on the screen. Through the use of a mobile device’s camera and fiducial markers, the user is able to see the functionality of the instruction manual superimposed directly over the chainsaw. We created the application using Unity, a cross-platform game engine. We used a set of Unity plugins from Vuforia, an Augmented Reality Software Development Kit (SDK) for mobile devices. Vuforia provided us the tools for image target identification and tracking, allowing us to easily show augmented content on a digital device. Our application aims to maximize safe and proper chainsaw use, demonstrates the potential of augmented reality for future industrial applications and exemplifies a paperless and eco-friendly guide.
Voltage analytics to infer customer phase (2014)

Utilities world wide are introducing advanced automation in planning, operations, and maintenance of their distribution networks. However, most of these automation solutions rely on an accurate connectivity model of the distribution network, which can easily become outdated due to system changes. This work presents novel analytics techniques that can infer the connectivity model from electrical voltage measurements. The techniques may be used to infer phase connectivity either solely from customer voltage data, or in combination with measurements from the medium voltage network and any existing but partly accurate phasing information. We report analysis results based on customer and feeder voltage measurements collected from a large distribution circuit that serves more than 1.5K single-phase customers. Our results indicate that voltage measurements spanning a few days could be utilized to infer customer phase with high accuracy (93%). To the best of our knowledge, this is the first measurement study of voltage data collected from low and medium voltage segments of a feeder circuit and its use in estimating customer phase.
Measurement of the Bubbly Flow Beneath Partial Attached Cavities Using Electrical Impedance Probes (1999)

Surface electrical impedance probes are used to examine the bubbly flow beneath and in the closure region of partial attached cavities. A series of electrodes were mounted flush to the surface of a cavitating hydrofoil to detect the presence of liquid or vapor through changes in the impedance of the local fluid medium. Signals from the electrical probes were used to determine the near-surface gas-phase velocity and the shedding frequency of the gas phase. The impedance technique is shown to have the potential to measure advection velocities within a partial cavity, and the frequency content of the signal is used to determine the dynamics of the vapor shedding process. [S0098-2202(00)00501-0]
Importance of boundary conditions for fluctuation-induced forces between colloids at interfaces (2007)

We calculate the effective fluctuation-induced force between spherical or disklike colloids trapped at a flat, fluid interface mediated by thermally excited capillary waves. This Casimir-type force is determined by the partition function of the system which in turn is calculated in a functional integral approach, where the restrictions on the capillary waves imposed by the colloids are incorporated by auxiliary fields. In the long-range regime the fluctuation-induced force is shown to depend sensitively on the boundary conditions imposed at the three-phase contact line between the colloids and the two fluid phases. Separating the colloid fluctuations from the fluctuations of the capillary wave field leads to competing repulsive and attractive contributions, respectively, which give rise to cancellations of the leading terms. In a second approach based on a multipole expansion of the Casimir interaction, these cancellations can be understood from the vanishing of certain multipole moments enforced by the boundary conditions. We also discuss the connection of the different types of boundary conditions to certain external fields acting on the colloids which appear to be realizable by experimental techniques such as the laser tweezer method.
Electrodic voltages in the presence of dissolved sulfide: Implications for monitoring natural microbial activity (2008)

Abstract There is growing interest in the development of new monitoring strategies for obtaining spatially extensive data diagnostic of microbial processes occurring in the earth. Open-circuit potentials arising from variable redox conditions in the fluid local-to-electrode surfaces (electrodic potentials) were recorded for a pair of silver-silver chloride electrodes in a column experiment, whereby a natural wetland soil containing a known community of sulfate reducers was continuously fed with a sulfate-rich nutrient medium. Measurements were made between five electrodes equally spaced along the column and a reference electrode placed on the column inflow. The presence of a sulfate reducing microbial population, coupled with observations of decreasing sulfate levels, formation of black precipitate (likely iron sulfide),elevated solid phase sulfide, and a characteristic sulfurous smell, suggest microbial-driven sulfate reduction (sulfide generation) in our column. Based on the known sensitivity of a silver electrode to dissolved sulfide concentration, we interpret the electrodic potentials approaching 700mV recorded in this experiment as an indicator of the bisulfide (HS−) concentration gradients in the column. The measurement of the spatial and temporal variation in these electrodic potentials provides a simple and rapid method for monitoring patterns of relative HS− concentration that are indicative of the activity of sulfate-reducing bacteria. Our measurements have implications both for the autonomous monitoring of anaerobic microbial processes in the subsurface and the performance of self-potential electrodes, where it is critical to isolate, and perhaps quantify, electrochemical interfaces contributing to observed potentials.
Karyotype plus NPM1 mutation status defines a group of elderly patients with AML (≥60 years) who benefit from intensive post‐induction consolidation therapy (2016)

Although it is generally appreciated that a subset of elderly patients with acute myeloid leukemia (AML) may benefit from intensive consolidation, little is known about variables predicting such benefit. We analyzed 192 consecutive patients with de novo AML aged ≥60 years who were treated with intensive chemotherapy. About 115 patients (60%) achieved complete hematologic remission (CR). Among several parameters, the karyotype was the only independent variable predicting CR (P < 0.05). About 92% (105/115) of the CR-patients received up to four consolidation cycles of intermediate dose ARA-C. Median continuous CR (CCR) and disease-free survival (DFS) were 1.3 and 1.1 years, respectively. CCR, DFS, and survival at 5 years were 23%, 18%, and 15%, respectively. Only karyotype and mutated NPM1 (NPM1mut) were independent predictors of survival. NPM1mut showed a particular prognostic impact in patients with normal (CN) or non-monosomal (Mkneg) karyotype by Haemato-Oncology Foundation for Adults in the Netherlands (HOVON)-criteria, or intermediate karyotype by Southwest Oncology Group (SWOG)-criteria. The median CCR was 0.94, 1.6, 0.9, and 0.5 years for core-binding-factor, CN/Mkneg-NPM1mut, CN/Mkneg-NPM1-wild-type AML, and AML with monosomal karyotype, respectively, and the 5-year survival was 25%, 39%, 2%, and 0%, respectively (P < 0.05). Similar results (0.9, 1.5, 0.9, and 0.5 years) were obtained using modified SWOG criteria and NPM1 mutation status (P < 0.05). In summary, elderly patients with CN/Mkneg-NPM1mut or CBF AML can achieve long term CCR when treated with intensive induction and consolidation therapy whereas most elderly patients with CN/Mkneg-NPM1wt or Mkpos AML may not benefit from intensive chemotherapy. For these patients either hematopoietic-stem-cell-transplantation or alternative treatments have to be considered. Am. J. Hematol. 91:1239-1245, 2016. © 2016 Wiley Periodicals, Inc.
Synthesis of a Colorless Suspension Using Surface Modified TiO2 Nanoparticles (2013)

The effects of N-doping on the bead milling dispersion behaviors and optical properties of anatase TiO2 nanoparticles have been investigated and compared with those of bare TiO2. N-doped TiO2 nanoparticles were prepared by mixing anatase powder with urea, and heating the mixture at 800°C for 3 h. The nitrogen elements in the N-doped TiO2 samples were confirmed by Raman analysis. The N-doped TiO2 nanoparticles were then dispersed by bead milling with small beads (15μm) in diglyme using APS as a dispersing agent. The resulting N-doped TiO2 nanoparticles were transparent and colorless suspensions, whereas the dispersed bare TiO2 nanoparticles were yellow. The formation of colorless suspensions by the N-doping process was investigated using a model of the interaction of the N-doped TiO2 surface with the adsorbed dispersant.
Src Activation in the Induction of Long-Term Potentiation in CA1 Hippocampal Neurons (1998)

Long-term potentiation (LTP) is an activity-dependent strengthening of synaptic efficacy that is considered to be a model of learning and memory. Protein tyrosine phosphorylation is necessary to induce LTP. Here, induction of LTP in CA1 pyramidal cells of rats was prevented by blocking the tyrosine kinase Src, and Src activity was increased by stimulation producing LTP. Directly activating Src in the postsynaptic neuron enhanced excitatory synaptic responses, occluding LTP. Src-induced enhancement of alpha-amino-3-hydroxy-5-methylisoxazolepropionic acid (AMPA) receptor-mediated synaptic responses required raised intracellular Ca2+ and N-methyl-D-aspartate (NMDA) receptors. Thus, Src activation is necessary and sufficient for inducing LTP and may function by up-regulating NMDA receptors.
Analog Coherent Detection for Energy Efficient Intra-Data Center Links at 200 Gbps Per Wavelength (2020)

As datacenters continue to scale in size, energy efficiency for short reach (<; 2 km) links is a major factor for networks that may connect hundreds of thousands of servers. We demonstrate that links based on analog coherent detection (ACD) offer a promising path to simultaneously achieving significantly larger link budgets and improved link energy efficiency. A complete analysis is presented that considers the power consumption of all the photonic and electronic components necessary to realize an ACD link architecture based on 50 Gbaud (GBd) quadrature phase-shift keying (QPSK) signaling combined with polarization multiplexing to achieve 200 Gb/s/λ. These links utilize receivers that incorporate an optical phase-locked loop (OPLL) to frequency- and phase-lock the local oscillator (LO) laser to the incoming signal. QPSK modulation offers compelling advantages both in achievable link budget and in energy efficiency. Indeed, low-complexity electronics based on limiting amplifiers can be used as opposed to the linear front-ends, A/D converters, and digital signal processing (DSP) required for higher-order QAM or PAM formats. Our analysis indicates that links with 13 dB of unallocated budget operating at error rates of <; 10 <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">-12</sup> can be achieved and is compatible with higher error rates that require forward error correction (FEC). We present a comparison of silicon and InP platforms and evaluate both traveling-wave and segmented modulator designs, providing an illustration of the wide design space before converging on the most promising architectures that maximize energy efficiency and minimize laser power. We establish the theoretical potential to achieve picojoule-per-bit energy efficiency targets.
The first 2 years of life: implications of recent findings (2009)

Current management of newly diagnosed children with cystic fibrosis in specialist centres fails to prevent lung damage. In order to better define relations between infection, inflammation and lung damage, simple, sensitive and specific markers of lower airway infection are required. Data emerging from systematic early surveillance programs indicate that measures of lung damage, lung function, airway inflammation and endobronchial infection could be used as outcome measures for early intervention studies to prevent the respiratory sequelae of cystic fibrosis.