Software for Wearable Devices: Challenges and Opportunities

Wearable devices are a new form of mobile computer system that provides exclusive and user-personalized services. Wearable devices bring new issues and challenges to computer science and technology. This paper summarizes the development process and the categories of wearable devices. In addition, we present new key issues arising in aspects of wearable devices, including operating systems, database management system, network communication protocol, application development platform, privacy and security, energy consumption, human-computer interaction, software engineering, and big data.Comment: 6 pages, 1 figure, for Compsac 201

A Data-Centric Analysis on Stem Majoring and Success: Attitude And Readiness

This research studies attitude and readiness of STEM majoring and success with the data from a survey with a total of 501 viable responses, with respect to STEM (science, technology, engineering, and mathematics) related majors that are essential and fundamental to skills relevant to big data business analytics. Recruiting and keeping students in STEM areas have attracted a large body of attention in pedagogical studies. An effective way of achieving such a goal is to show them how rewarding and self-fulfilling STEM careers can be toward perspective students. One example of the abundance of STEM careers is the rapid growth of business analytics positions in the job market, which is a major motivation of this study. Business analytics makes extensive use of data, including data mining, statistical analysis, quantitative modeling, and explanatory and predictive analytics, in order to help make actionable decisions and to improve business operations. We found that there is a statistically significant correlation between STEM interests and success factors of majoring in STEM, which is a natural step forward to filling in the talent gap business analytics. Practical implications are also discussed

Optimization design for ultrasonic horn with large amplitude based on genetic algorithm

With the functions of amplitude amplification, impedance matching and protecting the transducer in ultrasonic machining system, ultrasonic horn is an important component in design of power ultrasonic vibration system. A new horn with large amplitude is designed. The profile of the horn is a cubic Bezier Curve. Based on genetic algorithm, the horn with large vibration amplitude ratio was obtained by optimizing the control points at the starting point and the end point of Bezier Curve. Simulation comparison was also carried out on the vibration performances of other four kinds of horns. Bezier horn and conical horn were manufactured by numerical control (NC) technology, in addition, measurement and comparison were carried out on their performances by combining with a vibrator. Results show that the amplitude of the optimized Bezier horn is 73.5 % larger than that of conical horn. Under the excitation voltage of 200 Vp-p, the amplitude of the Bezier horn can reach 108 µm

Reconstruction of relativistic modified Newtonian dynamics for various cosmological scenarios

In this paper, we present several explicit reconstructions for a novel relativistic theory of modified Newtonian dynamics (RMOND) derived from the background of Friedmann-Lema$\hat{\text{\i}}$tre-Robertson-Walker cosmological evolution. It is shown that the Einstein-Hilbert Lagrangian with a positive cosmological constant is the only Lagrangian capable of accurately replicating the exact expansion history of the $\Lambda$ cold dark matter ($\Lambda$CDM) universe filled solely with dust-like matter and the only way to achieve this expansion history for the RMOND theory is to introduce additional degrees of freedom to the matter sectors. Besides, we find that the $\Lambda$CDM-era also can be replicated without any real matter field within the framework of the RMOND theory and the cosmic evolution exhibited by both the power-law and de-Sitter solutions also can be obtained

Mining Online Hotel Reviews: A Case Study from Hotels in China

Online customer reviews could shed light into their experience, opinions, feelings, and concerns. To gain valuable knowledge about customers, it becomes increasingly important for businesses to collect, monitor, analyze, summarize, and visualize online customer reviews posted on social media platforms such as online forums. In this paper, we present a case study that analyzes English-written online hotel reviews we gathered from 58 three to five-star hotels in China. The study identified a number of categories from the online hotel reviews, sentiment of each category as well as the correlations among the categories. The study also found that the overall review star rating correlates pretty well with the sentiment scores for both the title and the full content of the online customer review

(Z)-3-(4-Chloro­phen­yl)-1-(2,4-difluoro­phen­yl)-2-(1H-1,2,4-triazol-1-yl)prop-2-en-1-one

The asymmetric unit of the title compound, C17H10ClF2N3O, contains three independent mol­ecules. In each mol­ecule, the C=C bond has a cis conformation with respect to the triazole and chloro­phenyl groups. The dihedral angles formed by the triazole ring with the diflurophenyl and chloro­phenyl benzene rings, respectively, are 20.10 (14) and 73.22 (15), 25.31 (15) and 84.44 (15), and 16.44 (13) and 61.72 (14)° in the three mol­ecules while the dihedral angles between the benzene rings are 66.54 (13), 85.82 (12) and 58.37 (12)°

Realizing and detecting Stiefel-Whitney insulators in an optical Raman lattice

We propose a feasible scheme to realize a four-band Stiefel-Whitney insultor (SWI) with spin-orbit coupled ultracold atoms in an optical Raman lattice. Four selected spin states are coupled by carefully designed Raman lasers, to generate the desired spin-orbit interactions with spacetime inversion symmetry. We map out a phase diagram with respect to the experimental parameters, where a large topological phase region exists. We further present two distinct detection methods to resolve the non-abelian band topology, in both equilibrium and dynamical ways. The detection relies on the spin textures extracted from the time-of-flight imaging, showing the tomographic signatures in the ground states and long-time averaged patterns on certain submanifold via a bulk-surface duality. Our work paves a realistic way to explore novel real topology with quantum matters

T-cell lymphoblastic lymphoma presenting with pleural effusion: A case report

AbstractAdult lymphoblastic lymphoma (LBL) is an aggressive form of non-Hodgkin lymphoma occurring in predominantly adolescent and young adult men, accounting for 1% to 2% of all non-Hodgkin's lymphomas. In contrast to B-LBL, T-cell LBL is much more common, accounting for up to 90% of disease in adults. Mediastinal mass, pleural and/or pericardial effusions are the major characteristics of T-LBL. We report an 18-year-old male with a pleural effusion, mediastinal mass, a light pericardial effusion, and a normal hemogram. The cytology of the pleural effusion initially suggested malignancy, but definitive diagnosis was unclear. After a medical thoracoscopy, the partial pleura was picked and immunophenotypic study revealed the following: CD3+, TdT+, CD99+, CD20−. The patient was finally diagnosed with T-LBL and died only 6 months after that. The case highlight the point that medical thoracoscopy is a safe and accurate diagnostic procedure for pleural diseases, and partial pleura biopsy with immunophenotyping was essential for achieving the correct diagnosis of LBL