cssi/SciSciGPT-SciSciNet huggingface dataset:
A Cooperative Species: Human Reciprocity and Its Evolution

Why do humans, uniquely among animals, cooperate in large numbers to advance projects for the common good? Contrary to the conventional wisdom in biology and economics, this generous and civic-minded behavior is widespread and cannot be explained simply by far-sighted self-interest or a desire to help close genealogical kin. In A Cooperative Species, Samuel Bowles and Herbert Gintis--pioneers in the new experimental and evolutionary science of human behavior--show that the central issue is not why selfish people act generously, but instead how genetic and cultural evolution has produced a species in which substantial numbers make sacrifices to uphold ethical norms and to help even total strangers. The authors describe how, for thousands of generations, cooperation with fellow group members has been essential to survival. Groups that created institutions to protect the civic-minded from exploitation by the selfish flourished and prevailed in conflicts with less cooperative groups. Key to this process was the evolution of social emotions such as shame and guilt, and our capacity to internalize social norms so that acting ethically became a personal goal rather than simply a prudent way to avoid punishment. Using experimental, archaeological, genetic, and ethnographic data to calibrate models of the coevolution of genes and culture as well as prehistoric warfare and other forms of group competition, A Cooperative Species provides a compelling and novel account of how humans came to be moral and cooperative.
Height Representation, Critical Exponents, and Ergodicity in the Four-State Triangular Potts Antiferromagnet

We study the four-state antiferromagnetic Potts model on the triangular lattice. We show that the model has six types of defects which diffuse and annihilate according to certain conservation laws consistent with their having a vector-valued topological charge. Using the properties of these defects, we deduce a (2+2)-dimensional height representation for the model and hence show that the model is equivalent to the three-state Potts antiferromagnet on the Kagome lattice and to bond-coloring models on the triangular and honeycomb lattices. We also calculate critical exponents for the ground-state ensemble of the model. We find that the exponents governing the spin–spin correlation function and spin fluctuations violate the Fisher scaling law because of constraints on path length which increase the effective wavelength of the spin operator on the height lattice. We confirm our predictions by extensive Monte Carlo simulations of the model using the Wang–Swendsen–Kotecký cluster algorithm. Although this algorithm is not ergodic on lattices with toroidal boundary conditions, we prove that it is ergodic on lattices whose topology has no noncontractible loops of infinite order, such as the projective plane. To guard against biases introduced by lack of ergodicity, we perform our simulations on both the torus and the projective plane.
Investigation of IGES for CAD/CAE data transfer

The intent of this work is to present test data on translating design product data from a CAD/CAE system to itself and to translate data initially prepared in IGES (Initial Graphics Exchange Specification) format to various native design formats. This information can be utilized in planning potential procurement and developing a design discipline within the CAD/CAE community. IGES problems are discussed along with test procedures. >
Subsidy Incidence in Agricultural Land Markets: An Experimental Investigation

We use laboratory market experiments to control for market power and social norms in order to evaluate market outcomes associated with subsidy incidence. We estimate the incidence of a stylized agricultural subsidy in laboratory land rental negotiations and compare the market behavior of university students to agricultural professionals. In separate sessions with both subject groups, 21.5 percent of a per-unit subsidy paid to the buyer (tenant) was passed on to sellers (landlords). The consistent treatment effect between students and professionals is encouraging, particularly in the use of experimental laboratory methods for ex ante analyses of agricultural policy impacts.
On the bosonic spectrum of QCD (1+1) with SU(N) currents

Abstract In this note we calculate the spectrum of two-dimensional QCD. We formulate the theory with SU(N c ) currents rather than with fermionic operators. We construct the Hamiltonian matrix in DLCQ formulation as a function of the harmonic resolution K and the numbers of flavors N f and colors N c . The resulting numerical eigenvalue spectrum is free from trivial multi-particle states which obscured previous results. The well-known 't Hooft and large N f spectra are reproduced. In the case of adjoint fermions we present some new results.
Belief Disagreements and Collateral Constraints

Belief disagreements have been suggested as a major contributing factor to the recent subprime mortgage crisis. This paper theoretically evaluates this hypothesis. I assume that optimists have limited wealth and take on leverage so as to take positions in line with their beliefs. To have a significant effect on asset prices, they need to borrow from traders with pessimistic beliefs using loans collateralized by the asset itself. Since pessimists do not value the collateral as much as optimists do, they are reluctant to lend, which provides an endogenous constraint on optimists' ability to borrow and to influence asset prices. I demonstrate that the tightness of this constraint depends on the nature of belief disagreements. Optimism concerning the probability of downside states has no or little effect on asset prices because these types of optimism are disciplined by this constraint. Instead, optimism concerning the relative probability of upside states could have significant effects on asset prices. This asymmetric disciplining effect is robust to allowing for short selling because pessimists that borrow the asset face a similar endogenous constraint. These results emphasize that what investors disagree about matters for asset prices, to a greater extent than the level of disagreements. When richer contracts are available, relatively complex contracts that resemble some of the recent financial innovations in the mortgage market endogenously emerge to facilitate betting.
Missing credit markets and commodity marketing behavior

Our model of the agricultural household’s dynamic market participation decisions depends upon four principal features that result in the household’s per period optimal demand, supply, and storage decisions and therefore to their ultimate observed behavior: consumption smoothing, liquidity constraints, marketing regime choice and seasonal price patterns.
Intrusion detection and response for real-time distributed naval systems

Information security in naval environments is becoming increasingly important with the move towards distributed engineering and computing, increased automation, and systems based upon non-developmental items (NDI). Naval applications have a broad range of communication timing requirements, from tens of seconds to sub-seconds For example, the communication between geographically dispersed operational sites may require responses in the seconds or tens of seconds range, while the communication between applications in a shipboard combat system that are responsible for targeting weapons have much more constrained timing requirements. Additionally, there are mission critical applications that have hard real-time requirements in which the reception of data outside of specific timing limits results in system failure, as well as mission critical applications with near real-time requirements that can tolerate a wider boundary of communication response times. The integration of information securivy services in such an environment invariably conflicts with the timing requirements of these applications. However, security services are arguably needed most in environments with the tightest communication requirements (e.g., while engaging hostile targets). NSWC-DD has begun evaluating the applicability of Intrusion Detection Systems (IDS) in naval environments. This paper describes current security architectures of naval platforms, potential future architectures, and desirable features of an IDS that may be integrated into these architectures.
Self-stabilizing deterministic TDMA for sensor networks

An algorithm for time division multiple access (TDMA) is found to be applicable in converting existing distributed algorithms into a model that is consistent with sensor networks. Such a TDMA service needs to be self-stabilizing so that in the event of corruption of assigned slots and clock drift, it recovers to states from where TDMA slots are consistent. Previous self-stabilizing solutions for TDMA are either randomized or assume that the topology is known upfront and cannot change. Thus, the question of feasibility of self-stabilizing deterministic TDMA algorithm where topology is unknown remains open. In this paper, we present a self-stabilizing, deterministic algorithm for TDMA in networks where a sensor is aware of only its neighbors. This is the first such algorithm that achieves these properties. Moreover, this is the first algorithm that demonstrates the feasibility of stabilization-preserving, deterministic transformation of a shared memory distributed program on an arbitrary topology into a program that is consistent with the sensor network model.
On zero-error source coding with feedback

We consider the problem of zero error source coding with limited feedback when side information is present at the receiver. First, we derive an achievable rate region for arbitrary joint distributions on the source and the side information. When all pairs of source and side information symbols are observed with non-zero probability, we show that this characterization gives the entire rate region. Next, we demonstrate a class of sources for which asymptotically zero feedback suffices to achieve zero-error coding at the rate promised by the Slepian-Wolf bound for asymptotically lossless coding. Finally, we illustrate these results with the aid of three simple examples.
Multi-class Graph Mumford-Shah Model for Plume Detection Using the MBO scheme

We focus on the multi-class segmentation problem using the piecewise constant Mumford-Shah model in a graph setting. After formulating a graph version of the Mumford-Shah energy, we propose an efficient algorithm called the MBO scheme using threshold dynamics. Theoretical analysis is developed and a Lyapunov functional is proven to decrease as the algorithm proceeds. Furthermore, to reduce the computational cost for large datasets, we incorporate the Nystrom extension method which efficiently approximates eigenvectors of the graph Laplacian based on a small portion of the weight matrix. Finally, we implement the proposed method on the problem of chemical plume detection in hyper-spectral video data.
Intuitions about ordered beliefs leading to probabilistic models

The general use of subjective probabilities to model belief has been justified using many axiomatic schemes. For example, 'consistent betting behavior" arguments are well-known. To those not already convinced of the unique fitness and generality of probability models, such justifications are often unconvincing. The present paper explores another rationale for probability models. "Qualitative probability,' which is known to provide stringent constraints on belief representation schemes, is derived from five simple assumptions about relationships among beliefs. While counterparts of familiar rationality concepts such as transitivity, dominance, and consistency are used, the betting context is avoided. The gap between qualitative probability and probability proper can be bridged by any of several additional assumptions. The discussion here relies on results common in the recent AI literature, introducing a sixth simple assumption. The narrative emphasizes models based on unique complete orderings, but the rationale extends easily to motivate set-valued representations of partial orderings as well.
Plücker Relations on Schur Functions

We present a set of algebraic relations among Schur functions which are a multi-time generalization of the “discrete Hirota relations” known to hold among the Schur functions of rectangular partitions. We prove the relations as an application of a technique for turning Plucker relations into statements about Schur functions and other objects with similar definitions as determinants. We also give a quantum analogue of the relations which incorporates spectral parameters. Our proofs are mostly algebraic, but the relations have a clear combinatorial side, which we discuss.
Unpacking youth unemployment in Latin America

High youth unemployment rates may be a signal of difficult labor market entry for youth or may reflect high churning. The European and United States literature finds the latter conclusion while the Latin American literature suggests the former. This paper uses panel data to examine whether Latin American youth follow OECD patterns or are, indeed, unique. By decomposing transition matrices into propensity to move and rate of separation matrices and estimating duration matrices, the authors find that Latin American youth do follow the OECD trends: their high unemployment reflects high churning while their duration of unemployment is similar to that of non-youth. The paper also finds that young adults (age 19-24) have higher churning rates than youth; most churning occurs between informal wage employment, unemployment, and out-of-the labor force, even for non-poor youth; and unemployment probabilities are similar for men and women when the analysis control for greater churning by young men. The findings suggest that the"first employment"programs that have become popular in the region are not addressing the key constraints to labor market entry for young people and that more attention should be given to job matching, information, and signaling to improve the efficiency of the churning period.
Nanotechnology and Developing Countries – Part 2: What Realities?

Drawing on search-engine data gained from combining the term ‘nano’ with the title of every economy recognised by the World Bank, the research to be described here highlights a widespread developing country engagement with nanotechnology research and development. Subsequent investigation reveals that the orientation of developing country engagement is distant from nanotechnology’s ‘social development’ applications, often cited as most applicable to developing countries. The ability of less-developed countries to engage with nanotechnology R&D is explored along with current mechanisms to facilitate partnerships and access to information. The additional analysis of health-related patents confirms that the ‘nano-divide’ is already here. With China constituting the bulk of patents from the South, the divide is not just between the developed and developing world, it extends to within the developing world. An assessment of participation in international nanotechnology policy and dialogue highlights low levels of developing country representation, supporting the overall argument that nanotechnology may be set to follow the path of past technologies in creating a greater global technological divide.
Do Government Payments Influence Farm Business Survival

Using a unique farm-level panel data set derived from three U.S. Agricultural Censuses, we estimate a Cox proportional hazard model to examine the effect of direct government payments on the survival of farm businesses, paying particular attention to the differential effect of payments across farm size categories. For identification the study exploits variation in payments resulting from historical differences in 'base acreage' in otherwise similar farms. We find an increase in government payments has a small but statistically significant positive effect on the rate of farm survival, and the magnitude of this effect increases with farm size.
FANNIE MAE AND FREDDIE MAC: LEGAL IMPLICATIONS OF A SUCCESSOR COOPERATIVE

A financial cooperative of mortgage originators is capable of assuming the core securitization functions of Fannie Mae and Freddie Mac as part of a scheme to dismantle these institutions. Such a cooperative would offer advantages in maintaining adequate capitalization and could provide an effective governance structure. A federally chartered, Subchapter T cooperative appears preferable for that purpose.
Rapid and highly-sensitive detection using Fano resonances in ultrathin plasmonic nanogratings

We developed a nanoplasmonic sensor employing extraordinary optical properties of 30nm-thick ultrathin Ag nanogratings. An order-of-magnitude improvement in the temporal and spatial resolutions was achieved relative to state-of-the-art nanoplasmonic sensors, for comparable detection resolutions.
Very large array observations of disturbed ion flow from the plasmasphere to the nighttime ionosphere

[1] We present the results of a multiscale analysis of TEC fluctuations using a roughly five-hour observation of the bright radio source Virgo A with the Very Large Array (VLA) at 74 MHz in its B configuration. Our analysis combines data sensitive to fine-scale structure (∼10 km and <0.001 TECU in amplitude) along the line of sight to Virgo A as well as larger structures (hundreds of km) observed using several (∼30) moderately bright sources in the field of view. The observations span a time period from midnight to dawn local time during 1 March 2001. Several groups of magnetic eastward directed (MED), wavelike disturbances were identified and determined to be located within the plasmasphere (2.1 < L < 2.9). We have also detected evidence of non-wavelike structures associated with these disturbances which are propagating roughly toward magnetic north. These likely represent a non-uniform density flow from the plasmasphere toward the nighttime ionosphere. AE andKp indices and GPS TEC data indicate that during the observations, there were low levels of geomagnetic activity accompanied by somewhat localized depletions in ionospheric density. Thus, the observed plasmaspheric disturbance may be part of a flow triggered by these ionospheric depletions, likely associated with forcing from the lower atmosphere which is typically more prominent during quiet geomagnetic conditions. In addition, we have also observed several roughly westward directed and southeast directed waves located within the ionosphere. They are coincident in time with the plasmaspheric disturbances and may be related to the deposition of material onto the nighttime ionosphere.
Near-perfect simultaneous measurement of a qubit register

Simultaneous measurement of multiple qubits stored in hyperfine levels of trapped 111Cd+ ions is realized with an intensified charge-coupled device (CCD) imager. A general theory of fluorescence detection for hyperfine qubits is presented and applied to experimental data. The use of an imager for photon detection allows for multiple qubit state measurement with detection fidelities of greater than 98%. Improvements in readout speed and fidelity are discussed in the context of scalable quantum computation architectures.
An application of the photometric stereo method

The idea of photometric stereo is to determine the surface orientation of the points of an object in a picture using several views of an object taken with varying illumination, but from the same viewing direction. We can implement this method using reflectance map techniques. In order to calculate the reflectance map, we consider primarily the specular compenent of surface reflectance, since most industrial materials are very specular. The technique has been demonstrated by experiment.
Exploratory models of long-term crustal flow and resulting seismicity across the Alpine-Aegean orogen

[1] Long-term crustal flow is computed with a kinematic finite element model based on iterated weighted least squares fits to data and prior constraints. Data include 773 fault traces, 106 fault offset rates, 510 geodetic velocities, 2566 principal stress azimuths, and velocity boundary conditions representing the rigid parts of the Eurasia, Africa, and Anatolia plates. Model predictions include long-term velocities, fault slip rates, and distributed permanent strain rates between faults. One model assumes that geodetic velocities measured adjacent to the Aegean Trench reflect a temporarily locked subduction zone; in this case, long-term subduction velocity averages 45 mm/yr and rapid crustal extension is predicted in the southern Aegean Sea. Another model assumes steady creeping subduction; in this case, subduction velocity averages only 29 mm/yr, and the eastern Aegean Seafloor is predicted to be more nearly rigid. Long-term seismicity maps are computed for each model on the basis of the SHIFT hypotheses and previous global calibrations of plate boundary earthquake production. Retrospective comparisons to seismic catalogs are encouraging: map patterns, spatial distribution functions, and total earthquake counts are all comparable. While neither model accurately predicts earthquake rates at all magnitudes, the creeping subduction model is more accurate for strong m6+ events, which dominate the seismic hazard.
Seeking the general explanation: A test of inductive activities for learning and transfer

Evaluating the relation between evidence and theory should be a central activity for science learners. Evaluation comprises both hypothetico-deductive analysis, where theory precedes evidence, and inductive synthesis, where theory emerges from evidence. There is mounting evidence that induction is an especially good way to help learners grasp the deep structure (i.e., underlying principles) of phenomena. However, compared to the clear falsification logic of hypothetico-deductive analysis, a major challenge for induction is structuring the process to be systematic and effective. To address this challenge, we draw on Sir Francis Bacon's original treatise on inductive science. In a pair of experiments, college students used a computer simulation to learn about Faraday's law. In the inductive conditions, students sought a general explanation for several cases organized according to Bacon's tenets. In contrast, other students used a more hypothetico-deductive approach of sequentially testing (and revising) their hypotheses using the simulation. The inductive activity led to superior learning of a target principle measured by in-task explanations and posttests of near transfer and mathematical understanding. The results provide two important pieces of information. The first is that inductive activities organized by Bacon's tenets help students find the deep structure of empirical phenomena. The second is that, without an inductive “push,” students tend to treat instances separately and fail to search for their underlying commonalities. © 2014 Wiley Periodicals, Inc. J Res Sci Teach 52: 58–83, 2015
On the Approximability of Geometric and Geographic Generalization and the Min-Max Bin Covering Problem

We study the problem of abstracting a table of data about individuals so that no selection query can identify fewer than k individuals. We show that it is impossible to achieve arbitrarily good polynomial-time approximations for a number of natural variations of the generalization technique, unless P = NP , even when the table has only a single quasi-identifying attribute that represents a geographic or unordered attribute: - Zip-codes : nodes of a planar graph generalized into connected subgraphs - GPS coordinates : points in R2 generalized into non-overlapping rectangles - Unordered data : text labels that can be grouped arbitrarily. These hard single-attribute instances of generalization problems contrast with the previously known NP-hard instances, which require the number of attributes to be proportional to the number of individual records (the rows of the table). In addition to impossibility results, we provide approximation algorithms for these difficult single-attribute generalization problems, which, of course, apply to multiple-attribute instances with one that is quasi-identifying. Incidentally, the generalization problem for unordered data can be viewed as a novel type of bin packing problem---min-max bin covering ---which may be of independent interest.
The influence of pregnancy upon blood coagulation and plasma fibrinolytic enzyme function

Abstract Fibrinogen catabolism has been studied in 27 patients from early pregnancy through delivery and up to 4 months post partum using the noninvasive technique of plasma fibrinogen chromatography. This technique quantifies in plasma the percentage and concentration of high-molecular weight fibrinogen or fibrinogen/fibrin complexes (HMWFC), which reflect the rate of fibrin formation in vivo, native fibrinogen, and derivatives of fibrinogen smaller than the native molecule resulting from the actions of the enzyme plasmin on fibrinogen, an assay reflecting the rate of fibrinogenolysis. Plasma fibrinogen chromatographic findings were similar to control findings during the first gestational month but during the second gestational month plasma HMWFC percentage and concentration were elevated twofold to threefold over control values and thereafter increased with gestational age, being fivefold control values prior to delivery. Plasma fibrinogen increased by the third month and its increase was significantly (p
A multilevel-cell 32 Mb flash memory

A flash memory with multilevel cell significantly reduces the memory per-bit cost. A 32 Mb multilevel-cell (MLC) flash memory storing two bits of data per cell achieves 32 Mb memory storage capacity using 16 M flash memory cells. This 32 Mb flash memory on a 0.6 /spl mu/m process has a 2.0/spl times/1.8 /spl mu/m/sup 2/ flash cell. In MLC operation, the logical flash memory cell achieves two bits per cell using four possible states, defined by four flash cell threshold voltage ranges. The relationship between the threshold voltage ranges stored in the first memory cell and the corresponding logic levels is shown in this paper, which also shows a plot of the four threshold voltage distributions, each with a separation range.
Statistical-computational tradeoffs in planted problems and submatrix localization with a growing number of clusters and submatrices

We consider two closely related problems: planted clustering and submatrix localization. In the planted clustering problem, a random graph is generated based on an underlying cluster structure of the nodes; the task is to recover these clusters given the graph. The submatrix localization problem concerns locating hidden submatrices with elevated means inside a large real-valued random matrix. Of particular interest is the setting where the number of clusters/submatrices is allowed to grow unbounded with the problem size. These formulations cover several classical models such as planted clique, planted densest subgraph, planted partition, planted coloring, and the stochastic block model, which are widely used for studying community detection, graph clustering and bi-clustering. For both problems, we show that the space of the model parameters (cluster/submatrix size, edge probabilities and the mean of the submatrices) can be partitioned into four disjoint regions corresponding to decreasing statistical and computational complexities: (1) the impossible regime, where all algorithms fail; (2) the hard regime, where the computationally expensive Maximum Likelihood Estimator (MLE) succeeds; (3) the easy regime, where the polynomial-time convexified MLE succeeds; (4) the simple regime, where a local counting/thresholding procedure succeeds. Moreover, we show that each of these algorithms provably fails in the harder regimes. Our results establish the minimax recovery limits, which are tight up to universal constants and hold even with a growing number of clusters/submatrices, and provide order-wise stronger performance guarantees for polynomial-time algorithms than previously known. Our study demonstrates the tradeoffs between statistical and computational considerations, and suggests that the minimax limits may not be achievable by polynomial-time algorithms.
Learning the Parameters of Determinantal Point Process Kernels

Determinantal point processes (DPPs) are well-suited for modeling repulsion and have proven useful in applications where diversity is desired. While DPPs have many appealing properties, learning the parameters of a DPP is difficult, as the likelihood is non-convex and is infeasible to compute in many scenarios. Here we propose Bayesian methods for learning the DPP kernel parameters. These methods are applicable in large-scale discrete and continuous DPP settings, even when the likelihood can only be bounded. We demonstrate the utility of our DPP learning methods in studying the progression of diabetic neuropathy based on the spatial distribution of nerve fibers, and in studying human perception of diversity in images.
Limited angle tomography via multiresolution analysis and oversampling

A method is presented for reconstructing a function from its line integrals. This problem arises in imaging whenever the physical constraints of the system prohibit the gathering of the line integrals over the angles - pi /2 >
How Far Have Public Financial Management Reforms Come in Africa

This paper asks how strong African Public Financial Management (PFM) has become, after a decade and more of reform. How well do African PFM systems in place now facilitate effective public financial management? Where are the next challenges and how can they be met? It analyzes recent PFM assessments in 31 governments to answer these questions, identifying patterns of strengths and weaknesses across the PFM system and across countries. In respect of the former, the study finds that budgets are made better than they are executed, practice lags behind the creation of processes and laws, and processes are stronger where concentrated actors are engaged. In respect of the latter, the study finds that different countries fall into different 'PFM performance leagues' and countries in the different leagues look very different to each other. A range of factors influence which league a country is associated with; including economic growth, stability, reform tenure and colonial heritage. On the basis of this evidence, the paper argues that existing reforms face limits that can only be overcome with adjustments in reform approach; with less focus on pushing reform technicalities and more on creating 'space' in which reform takes place, less concentration of engagements with small sets of actors and more on expanding engagements, and less emphasis on reproducing the same reform models and more on better understanding what context-appropriate reforms look like.
Asymptotic analysis of Vlasov-type equations under strong local alignment regime

We consider the hydrodynamic limit of a collisionless and non-diffusive kinetic equation under strong local alignment regime. The local alignment is first considered by Karper, Mellet and Trivisa in [On strong local alignment in the kinetic Cucker–Smale model, in Hyperbolic Conservation Laws and Related Analysis with Applications, Springer Proceedings in Mathematics & Statistics, Vol. 49 (Springer, 2014), pp. 227–242], as a singular limit of an alignment force proposed by Motsch and Tadmor in [A new model for self-organized dynamics and its flocking behavior, J. Statist. Phys. 141 (2011) 923–947]. As the local alignment strongly dominates, a weak solution to the kinetic equation under consideration converges to the local equilibrium, which has the form of mono-kinetic distribution. We use the relative entropy method and weak compactness to rigorously justify the weak convergence of our kinetic equation to the pressureless Euler system.
Noncooperative Games for Autonomous Consumer Load Balancing over Smart Grid

Traditionally, most consumers of electricity pay for their consumptions according to a fixed rate. With the advancement of Smart Grid technologies, large-scale implementation of variable-rate metering becomes more practical. As a result, consumers will be able to control their electricity consumption in an automated fashion, where one possible scheme is to have each individual maximize its own utility as a noncooperative game. In this paper, noncooperative games are formulated among the electricity consumers in Smart Grid with two real-time pricing schemes, where the Nash equilibrium operation points are investigated for their uniqueness and load balancing properties. The first pricing scheme charges a price according to the average cost of electricity borne by the retailer and the second one charges according to a time-variant increasing-block price, where for each scheme, a zero-revenue model and a constant-rate revenue model are considered. The Nash equilibrium is shown to exist for four different combined cases corresponding to the two pricing schemes and the two revenue models, and is unique for three of the cases under certain conditions. It is further shown that both pricing schemes lead to similar electricity loading patterns when consumers are only interested in minimizing the electricity costs without any other profit considerations. Finally, the conditions under which the increasingblock pricing scheme is preferred over the average-cost based pricing scheme are discussed.
Three‐dimensional hydrodynamic simulations of accretion in short‐period Algols

Recent observations have shown that the direct-impact Algol systems U CrB and RS Vul possess gas located outside of the orbital plane, including a tilted accretion disc in U CrB. Observations of circumstellar gas surrounding the mass donor in RS Vul suggest magnetic effects could be responsible for deflecting the accretion stream out of the orbital plane, resulting in a tilted disc. To determine whether a tilted disc is possible due to a deflected stream, we use three-dimensional hydrodynamic simulations of the mass transfer process in RS Vul. By deflecting the stream 45° out of the orbital plane and boosting the magnitude of the stream's velocity to Mach 30, we mimic the effects of magnetic activity near the first Lagrange point. We find that the modified stream parameters change the direct-impact nature of the system. The stream misses the surface of the star, and a slightly warped accretion disc forms with no more than 3° of disc tilt. The stream–disc interaction for the deflected stream forces a large degree of material above the orbital plane, increasing the out-of-plane flow drastically. Plotting the Hα emissivity in velocity space allows us to compare our results with tomographic observations. Deflecting and boosting the stream increases the emissivity in each vz slice of the out-of-plane flow by at least three and up to eight orders of magnitude compared to the undeflected case. We conclude that a deflected stream is a viable mechanism for producing the strong out-of-plane flows seen in the tomographic images of U CrB and RS Vul.
Family Caregiving Challenges in Advanced Colorectal Cancer: Patient and Caregiver Perspectives

Purpose Family caregivers of advanced colorectal cancer patients may be at increased risk for psychological distress. Yet their key challenges in coping with the patient’s illness are not well understood. Soliciting both patient and caregiver perspectives on these challenges would broaden our understanding of the caregiving experience. Thus, the purpose of this research was to identify caregivers’ key challenges in coping with their family member’s advanced colorectal cancer from the perspective of patients and caregivers.
Is GeV emission from Gamma-Ray Bursts of external shock origin?

Recent observations of Gamma-Ray Bursts (GRBs) by the Fermi Large Area Telescope (LAT) revealed a power-law decay feature of the high-energy emission (above 100 MeV), which led to the suggestion that it originates from an external shock. We analyse four GRBs (080916C, 090510,090902B and 090926A) jointly detected by Fermi LAT and Gamma-ray Burst Monitor (GBM), which have high-quality light curves in both instrument energy bands. Using the MeV prompt emission (GBM) data, we can record the energy output from the central engine as a function of time. Assuming a constant radiative efficiency, we are able to track energy accumulation in the external shock using our internal/external shell model code. By solving for the early evolution of both an adiabatic and a radiative blastwave, we calculate the high-energy emission light curve in the LAT band and compare it with the observed one for each burst. The late time LAT light curves after T 90 can be well fitted by the model. However, due to continuous energy injection into the blastwave during the prompt emission phase, the early external shock emission cannot account for the observed GeV flux level. The high-energy emission during the prompt phase (before T 90 ) is most likely a superposition of a gradually enhancing external shock component and a dominant emission component that is of an internal origin.
Dense Optical Flow Prediction from a Static Image

Given a scene, what is going to move, and in what direction will it move? Such a question could be considered a non-semantic form of action prediction. In this work, we present a convolutional neural network (CNN) based approach for motion prediction. Given a static image, this CNN predicts the future motion of each and every pixel in the image in terms of optical flow. Our CNN model leverages the data in tens of thousands of realistic videos to train our model. Our method relies on absolutely no human labeling and is able to predict motion based on the context of the scene. Because our CNN model makes no assumptions about the underlying scene, it can predict future optical flow on a diverse set of scenarios. We outperform all previous approaches by large margins.
Calculated and Experimental Data for a 118-mm Bore Roller Bearing to 3 Million DN

Operating characteristics for a 118-mm bore cylindrical roller bearing were calculated using the computer program CYBEAN. The predicted results of inner and outer-race temperatures and heat transferred to the lubricant generally compared well with experimental data for shaft speeds to 3 million DN (25,500 rpm), radial loads to 8900 N (2000 lb), and total lubricant flow rates to 0.0102 cu m/min (2.7 gal/min).
Social Consequences of Commitment

This paper begins with a detailed computational introduction to a classic ACE model: an evolutionary prisoner's dilemma. The paper presents a simple but fully coded object oriented implementation of this model. (We use the Python programming language, which is shown to be a natural ally for ACE research). Using these tools, we demonstrate that player type evolution is affected by cardinal payoffs. We then explore a possible social benefit to commitment, where 'commitment' denotes an unwillingness to surrender a reciprocal strategy.
Argument Strength, the Toulmin Model, and Ampliative Probability

We argue that Cohen’s concept of inductive or ampliative probability facilitates proper explication of sufficient strength for non-demonstrative arguments conforming to the Toulmin model. The data and claims of such arguments are singular statements. We may epistemically classify the warrants of such arguments as empirical (either physical or personal), institutional, or evaluative. Backing evidence and rebutting considerations vary with the epistemic type of warrant, but in each case the notion of ampliative probability for arguments with warrants of that type can be characterized. We may then use ampliative probability to define sufficient strength and related notions for Toulmin arguments.
An efficient probabilistic context-free parsing algorithm that computes prefix probabilities

We describe an extension of Earley's parser for stochastic context-free grammars that computes the following quantities given a stochastic context-free grammar and an input string: a) probabilities of successive prefixes being generated by the grammar; b) probabilities of substrings being generated by the nonterminals, including the entire string being generated by the grammar; c) most likely (Viterbi) parse of the string; d) posterior expected number of applications of each grammar production, as required for reestimating rule probabilities. Probabilities (a) and (b) are computed incrementally in a single left-to-right pass over the input. Our algorithm compares favorably to standard bottom-up parsing methods for SCFGs in that it works efficiently on sparse grammars by making use of Earley's top-down control structure. It can process any context-free rule format without conversion to some normal form, and combines computations for (a) through (d) in a single algorithm. Finally, the algorithm has simple extensions for processing partially bracketed inputs, and for finding partial parses and their likelihoods on ungrammatical inputs.
Narcissistic personality disorder

Narcissistic personality disorder, NPD, by now a recognized psychiatric condition, has been extensively studied over the past century, but remains challenging both to diagnose and treat. At present, studies within different theoretical and empirical approaches, i.e., psychoanalytic, attachment focused, metacognitive, personality psychological, and neuroscientific, are contributing to advancing the definition and understanding of pathological narcissism and narcissistic personality functioning. This article will provide an overview of some of the latest advances in identifying and differentiating the prime characteristics for NPD in terms of regulation of self and agency, self-esteem, affects, and interpersonal relatedness. NPD focused treatment modalities will be reviewed.
Long-term Survival of Adult Trauma Patients

1.49 (95% CI, 1.14-1.94) for patients aged 66 to 75 years, 1.54 (95% CI, 1.271.87) for patients aged 76 to 80 years, and 1.38 (95% CI, 1.09-1.74) for patients older than 80 years. Other significant predictors of mortality after discharge included maximum head injury score on Abbreviated Injury Score scale (HR, 1.20; 95% CI, 1.13-1.26), Injury Severity Score (HR, 0.98; 95% CI, 0.97-0.98), Functional Independence Measure (HR, 0.89; 95% CI, 0.88-0.91), mechanism of injury being a fall (HR, 1.43; 95% CI, 1.30-1.58), and having Medicare (HR, 1.28; 95% CI, 1.15-1.43) or other government insurance (HR, 1.65; 95% CI, 1.47-1.85). Conclusions Among adults admitted for trauma in Washington State, 3-year cumulative mortality was 16% despite a decline in in-hospital deaths. Discharge to a skilled nursing facility at any age following trauma admission was associated with a higher risk of subsequent mortality.
Study of transients in the propagation of nonlinear waves in some reaction diffusion systems

We study the transient dynamics of single species reaction diffusion systems whose reaction terms f(u) vary nonlinearly near u ≈ 0, specifically as f(u) ≈ u2 and f(u) ≈ u3. We consider three cases, calculate their traveling wave fronts and speeds analytically and solve the equations numerically with different initial conditions to study the approach to the asymptotic front shape and speed. Observed time evolution is found to be quite sensitive to initial conditions and to display in some cases nonmonotonic behavior, ascribable to the disparity in time scales between the evolution of the front interior and the front tail.
A human embryonal—yolk sac carcinoma model system in athymic mice

Two new human cell lines (1411H and 1411HRQmet) have been established from a patient with metastatic testicular cancer whose primary and metastatic histology included seminoma, teratoma, embryonal carcinoma (EC), and yolk sac tumor (YST). In vitro, the cells have been maintained for more than 70 passages, produce alpha-fetoprotein (AFP) and human chorionic gonadotropin (hCG), and have a human karyotype. When 2 X 10(7) cells of either line are inoculated into athymic mice, 87.5% of the animals (21/24) develop tumors. Initially 80% to 90% of the mass is EC, whereas the central portion is YST. After 90 to 390 days in vivo, the tumors achieve a large volume (2.13 +/- 0.97 cm3), become cystic, and undergo histologic change. The peripheral rim of the mass remains EC, but the central 80% to 90% becomes YST. The sera of tumor-bearing mice were positive for hCG and AFP in 11% and 38% of animals, respectively. Tumor cyst fluid was positive for hCG and AFP in 87% and 59% of animals, with mean values of 108 mIU/ml and 2,478 ng/ml, respectively. Tumor cyst fluid also contained placental alkaline phosphatase and human fibronectin. These two cell lines are useful for studies on the interrelationship of EC and YST and the differentiation of human germ cell cancer.
Gauged Gromov–Witten theory for small spheres

We relate the genus zero gauged Gromov–Witten invariants of a smooth projective variety for sufficiently small area with equivariant Gromov–Witten invariants. As an application we deduce a gauged version of abelianization for Gromov–Witten invariants in the small area chamber. In the symplectic setting, we prove that any sequence of genus zero symplectic vortices with vanishing area has a subsequence that converges after gauge transformation to a holomorphic map with zero average moment map.
ELECTRICALLY DRIVEN SEPARATION PROCESSES: ANALYTICAL AND PREPARATIVE METHODS*

Reprinted from Separation Processes in Biotechnology; Asenjo, J.A., Ed.; Bioprocess Technology, Vol. 9; Marcel Dekker, Inc.; New York, 1990; 517–568.
Physical observations of (5145) Pholus

We present physical measurements of the newly discovered asteroid, (5145) Pholus, based on seven nights of photometric observations. These observations determine an unambiguous lightcurve period of 9.9825 ± 0.0040 hr with a peak-to-peak amplitude of 0.15 mag. We also report a rotationally independent color of (V − R) = 0.810 ± 0.006 (Kron-Cousins R). The standard IAU two parameter fit versus solar phase angle yields HV = 7.645 ± 0.011 and GV = 0.16 ± 0.08. Except for its color and orbit, (5145) Pholus exhibits normal asteroidal properties.
The Tropical Western Hemisphere Warm Pool

The Western Hemisphere warm pool (WHWP) of water warmer than 28.5°C extends from the eastern North Pacific to the Gulf of Mexico and the Caribbean, and at its peak, overlaps with the tropical North Atlantic. It has a large seasonal cycle and its interannual fluctuations of area and intensity are significant. Surface heat fluxes warm the WHWP through the boreal spring to an annual maximum of SST and areal extent in the late summer/early fall, associated with eastern North Pacific and Atlantic hurricane activities and rainfall from northern South America to the southern tier of the United States. SST and area anomalies occur at high temperatures where small changes can have a large impact on tropical convection. Observations suggest that a positive ocean-atmosphere feedback operating through longwave radiation and associated cloudiness is responsible for the WHWP SST anomalies. Associated with an increase in SST anomalies is a decrease in atmospheric sea level pressure anomalies and an anomalous increase in atmospheric convection and cloudiness. The increase in convective activity and cloudiness results in less longwave radiation loss from the surface, which then reinforces SST anomalies.
A language for computational algebra

This paper reports ongoing research at the IBM Research Center on the development of a language with extensible parameterized types and generic operators for computational algebra. The language provides an abstract data type mechanism for defining algorithms which work in as general a setting as possible. The language is based on the notions of domains and categories. Domains represent algebraic structures. Categories designate collections of domains having common operations with stated mathematical properties. Domains and categories are computed objects which may be dynamically assigned to variables, passed as arguments, and returned by functions. Although the language has been carefully tailored for the application of algebraic computation, it actually provides a very general abstract data type mechanism. Our notion of a category to group domains with common properties appears novel among programming languages (cf. image functor of RUSSELL) and leads to a very powerful notion of abstract algorithms missing from other work on data types known to the authors.