Exploration of the consideration factors of pure e-commerce business for transforming into new retail model

Since the outbreak of COVID-19 in the early year 2020, many businesses and industries have encountered serious impact on their operation and maintenance, but the significant growth rate of e-Commerce industries has caught all people’s eyes. Many domestic and foreign leading businesses are forced to speed up their configuration for moving into e-Commerce and m- Commerce. For e-Commerce businesses, they do not have much physical communication and interaction with consumers, it may eliminate the expensive management costs, but they cannot provide customers with good opportunities for experiencing. So, how to pure e-Commerce transform into the New Retail Omnichannel operating model is an important research issue. In view of all, this study intends to apply Analytic Hierarchy Process (AHP) in combination with the Fuzzy Theory to analyze a decision-making issue, namely, what factors are deemed important or concerns to “the pure e-Commerce businesses” in their future transformation into New Retail Omnichannel operating model. In the results of this study, “increase revenue”, “develop customer’s potential market”, “increase stock turnover, “reduce reverse logistics costs”, and “increased management costs” are the five consideration factors most important to transformation into new retail model. The results from this study provide the pure e-Commerce businesses with considerably useful reference in the issue of transformation into New Retail operating model in their future

An attribution model of trust extension across group boundaries

We reasoned that observing high levels of cooperation among outgroup members might be threatening, causing perceivers to expect little cooperation across group boundaries. Alternately, cooperation among outgroup members might be interpreted dispositionally, causing perceivers to expect cooperation to extend across group boundaries. Across two studies, participants were assigned to a minimal group and observed a series of players - either outgroup-pairs, ingroup-pairs or intergroup-pairs - play prisoner\u27s dilemma games and make overwhelmingly cooperative decisions (90%). Results were consistent with the dispositional rather than the threat hypothesis. Positive cooperative expectations and dispositional inferences for outgroup targets were greatest in the outgroup-pairs condition, followed by the intergroup condition, followed by the ingroup-pairs condition. Effects were not moderated by a possible situational attribution (presence of a third party punisher). Without stereotypes or intergroup conflict, perception of outgroup targets was based on individual-level behavioral evidence - more instances of cooperation translated into stronger dispositional inferences

The two-phase model for calculating thermodynamic properties of liquids from molecular dynamics: Validation for the phase diagram of Lennard-Jones fluids

We propose a general approach for determining the entropy and free energy of complex systems as a function of temperature and pressure. In this method the Fourier transform of the velocity autocorrelation function, obtained from a short (20 ps) molecular dynamics trajectory is used to obtain the vibrational density of states (DoS) which is then used to calculate the thermodynamic properties by applying quantum statistics assuming each mode is a harmonic oscillator. This approach is quite accurate for solids, but leads to significant errors for liquids where the DoS at zero frequency, S(0), remains finite. We show that this problem can be resolved for liquids by using a two phase model consisting of a solid phase for which the DoS goes to zero smoothly at zero frequency, as in a Debye solid; and a gas phase (highly fluidic), described as a gas of hard spheres. The gas phase component has a DoS that decreases monotonically from S(0) and can be characterized with two parameters: S(0) and 3Ng, the total number of gas phase modes [3Ng0 for a solid and 3Ng3(N–1) for temperatures and pressures for which the system is a gas]. To validate this two phase model for the thermodynamics of liquids, we applied it to pure Lennard-Jones systems for a range of reduced temperatures from 0.9 to 1.8 and reduced densities from 0.05 to 1.10. These conditions cover the gas, liquid, crystal, metastable, and unstable states in the phase diagram. Our results compare quite well with accurate Monte Carlo calculations of the phase diagram for classical Lennard-Jones particles throughout the entire phase diagram. Thus the two-phase thermodynamics approach provides an efficient means for extracting thermodynamic properties of liquids (and gases and solids)

Two-Phase Thermodynamic Model for Efficient and Accurate Absolute Entropy of Water from Molecular Dynamics Simulations

Presented here is the two-phase thermodynamic (2PT) model for the calculation of energy and entropy of molecular fluids from the trajectory of molecular dynamics (MD) simulations. In this method, the density of state (DoS) functions (including the normal modes of translation, rotation, and intramolecular vibration motions) are determined from the Fourier transform of the corresponding velocity autocorrelation functions. A fluidicity parameter (f), extracted from the thermodynamic state of the system derived from the same MD, is used to partition the translation and rotation modes into a diffusive, gas-like component (with 3Nf degrees of freedom) and a nondiffusive, solid-like component. The thermodynamic properties, including the absolute value of entropy, are then obtained by applying quantum statistics to the solid component and applying hard sphere/rigid rotor thermodynamics to the gas component. The 2PT method produces exact thermodynamic properties of the system in two limiting states: the nondiffusive solid state (where the fluidicity is zero) and the ideal gas state (where the fluidicity becomes unity). We examine the 2PT entropy for various water models (F3C, SPC, SPC/E, TIP3P, and TIP4P-Ew) at ambient conditions and find good agreement with literature results obtained based on other simulation techniques. We also validate the entropy of water in the liquid and vapor phases along the vapor−liquid equilibrium curve from the triple point to the critical point. We show that this method produces converged liquid phase entropy in tens of picoseconds, making it an efficient means for extracting thermodynamic properties from MD simulations

Thermodynamics of liquids: standard molar entropies and heat capacities of common solvents from 2PT molecular dynamics

We validate here the Two-Phase Thermodynamics (2PT) method for calculating the standard molar entropies and heat capacities of common liquids. In 2PT, the thermodynamics of the system is related to the total density of states (DoS), obtained from the Fourier Transform of the velocity autocorrelation function. For liquids this DoS is partitioned into a diffusional component modeled as diffusion of a hard sphere gas plus a solid component for which the DoS(υ) → 0 as υ → 0 as for a Debye solid. Thermodynamic observables are obtained by integrating the DoS with the appropriate weighting functions. In the 2PT method, two parameters are extracted from the DoS self-consistently to describe diffusional contributions: the fraction of diffusional modes, f, and DoS(0). This allows 2PT to be applied consistently and without re-parameterization to simulations of arbitrary liquids. We find that the absolute entropy of the liquid can be determined accurately from a single short MD trajectory (20 ps) after the system is equilibrated, making it orders of magnitude more efficient than commonly used perturbation and umbrella sampling methods. Here, we present the predicted standard molar entropies for fifteen common solvents evaluated from molecular dynamics simulations using the AMBER, GAFF, OPLS AA/L and Dreiding II forcefields. Overall, we find that all forcefields lead to good agreement with experimental and previous theoretical values for the entropy and very good agreement in the heat capacities. These results validate 2PT as a robust and efficient method for evaluating the thermodynamics of liquid phase systems. Indeed 2PT might provide a practical scheme to improve the intermolecular terms in forcefields by comparing directly to thermodynamic properties

Neck mass as the first presentation of metastatic prostatic adenocarcinoma

AbstractAdenocarcinoma of the prostate (CAP) is a rare diagnosis in men younger than 50 years of age; this age group accounts for less than 0.1% of all patients with prostatic cancer. Left supraclavicular lymphadenopathy (LSCL) as the presenting symptom of metastatic CAP is even rarer. No cases of CAP presenting as LSCL in men younger than 45 years have been reported in the literature. Here we report a 42-year-old male with the uncommon presentation of CAP as LSCL. In adult males with persistent LSCL, even if younger than 45 years, measurement of serum prostate specific antigen is warranted at the time of initial presentation, and the lymph node biopsy should be subsequently stained for prostate specific antigen immunohistochemically. These examinations are crucial to establish a definitive diagnosis of CAP and, in turn, to institute appropriate management and achieve the best possible outcome

THE EFFECTS OF GOLF SHAFT AND CLUBHEAD ON THE VELOCITY OF CLUB-HEAD AND BALL

The purpose of this study was to investigate 1) the influence of the bending stiffness of the golf shaft on the velocity of the club-head and the ball, and 2) the influence of different club-heads on the velocity of the club-head and the ball. Four different drivers made up of two different shaft stiffness (R-stiff, L-flexible) and club head (Titanium, Graphite) were used in the experiments. The results showed that the shaft stiffness L resulted in slower before-impact club head velocity than the shaft stiffness R, whereas the shaft stiffness L resulted in higher maximum ball velocity than shaft stiffness R. But the result in the statistics showed no significant club-head material effect on either clubhead velocity or the ball velocity. And there was no significant shaft stiffness effect on either club-head velocity or the ball velocity

CUSHIONING PROPERTIES OF SHOE-SURFACE INTERFACES IN DIFFERENT IMPACT ENERGIES

The purpose of this study was to evaluate the cushioning properties of the various shoesurface interfaces in different impact energies. Five shoe-surface conditions were tested in twelve different impact energies (3.19~6.67 joule). Results showed that higher impact energy increased the peak inertial force in each condition. Larger peak inertial forces were found in C1 (polyurethane only) and C5 (asphalt+shoe2) conditions. In low impact energy, the peak inertial forces were similar in C2 (polyurethane+shoe1), C3 (polyurethane+shoe2) and C4 (Asphalt+shoe1) conditions. The peak forces in C3 or C4 were larger than C2 in high impact energy. It was concluded that people ought to choose at least a well-cushioned shoe or surface when doing low impact energy activities, such as walking or jogging, and must choose both well-cushioned shoe and surface when doing high impact energy activities