Miracle-dz/UniFAR-FTUs huggingface dataset:
Coordination of Joint Search in Distributed Innovation Processes: Lessons from the Effects of Initial Code Release in Open Source Software Development

This paper casts light on the role of initial code release for providing coordination of joint search processes, i.e., search processes that involve several agents who search together. We develop hypotheses about the role of initial code release for providing coordination, and for whether development projects remain active. We test these hypotheses on a dataset of 5703 open source software projects registered on SourceForge during a two-year period. We find that initial code release is indeed associated with improved coordination, and a higher chance that software development projects will actually release further code subsequently. We contribute to theory on coordination in joint search, common in distributed innovation settings.
Environment-Based Strategic Management Model for Indonesia’s Medium-Sized Shipyards

Since the nature of the shipyard differs from general industry, a shipyard strategy formulation model has been developed based on its own business characteristics. This paper presents a proposed environment-based strategy formulation model for medium-sized shipyards. A questionnaire survey of the industry's stakeholders was carried out to identify the internal and external strategic factors of the shipyard's businesses. By using multivariate factor analysis, the strategic factors were identified in both new building and ship repair. The results were then used to develop business environment submodels and a shipyard business matrix. These industry-based models were integrated into a shipyard strategy formulation model called YARDSTRAT. Its application and evaluation in two shipyards show that the proposed model could produce more comprehensive strategic options to sustainable competitive advantage for the companies.
Condition monitoring of machinery using motor current signature analysis

Motor current signature analysis (MCSA) is a powerful monitoring tool for motor-driven equipment that provides a nonintrusive means for detecting the presence of mechanical and electrical abnormalities in the motor and the driven equipment, including altered conditions in the process ''downstream'' of the motor-driven equipment. It was developed at the Oak Ridge National Laboratory as a means for determining the effects of aging and service wear systems, but it is applicable to a broad range of machinery. MCSA is based on the recognition that an electric motor (ac or dc) driving a mechanical load acts as an efficient and permanently available transducer by sensing mechanical load variations, large and small, long-term and rapid, and converting them into variations in the induced current generated in the motor windings. These motor current variations are carried by the electrical cables processes as desired. Motor current signatures, obtained in both time and over time to provide early indication of degradation. Successful applications of MCSA technology (patent applied for) include not only motor-operated valves but also pumps of various designs, blowers, and air conditioning systems. Examples are presented briefly, and speculation regarding the applicability of MCSA to a broader range of equipment monitoring and productionmore » line testing is also given. 1 ref. , 13 figs.« less
Optimisation of dynamic characteristics of a MDOF system by mass and stiffness modification

An analytical approach is presented in this paper for determining multiple mass or stiffness modifications of an undamped structural system in terms of relocating a resonance. This approach is straightforward and simple. It is suitable for both small modifications (by means of preserving subset or entire mode shapes of the original system) and large structural modifications. This approach does not require the complete eigenvalue solution of the original system to provide exact solution. It requires only the receptance data at designated modification points which makes the approach particularly practical. Numerical examples and finite element implementation of the methods developed in this work are given and numerical results are provided to demonstrate the feasibility of the methods.
Behavior and strength of welded stud shear connectors in composite beam

In this paper the behaviour of stud shear connectors in composite structures is analysed. The composite section is formed by steel profiles connected to solid concrete slabs. Some effective numerical models using the finite element method to simulate the push-out test are proposed. The results obtained from the numerical analysis were verified against experimental results. The material nonlinearities were considered in the models. A bilinear model for steel was considered, and a model of plastic damage (Concrete Damaged Plasticity) in concrete was also adopted. The shear connection capacity obtained from the finite element analysis is compared with the connection strength calculated using the American Specification and the European Code for headed stud shear connector in solid slab composite section. Modifications to existing expressions in these codes are proposed. New factors that improve the prediction of the shear connection capacity are considered.
Development of lentiviral vectors to study the influence of angiogenic molecules on glioma growth

Glioblastomas are highly lethal tumors of the central nervous system characterized by large spread into the surrounding tissues. They modify and migrate along pre-existing blood vessels. This vascular cooption is a process involving the release of angiopoietin-2 (Angpt2) from endothelial cells and binding to the Tie2 receptor. The first goal of this study was to examine the therapeutic potential of two proteins that could interfere with Angpt2, namely Angpt3 and the soluble extracellular domain of Tie2 (sTie2). The second goal was to develop a lentiviral vector capable of delivering such proteins while offering the possibility to identify and destroy the genetically modified cells. To this end, we designed a bicistronic construct expressing the marker enhanced green fluorescent protein (EGFP) fused to the suicide gene herpes simplex virus 1-thymidine kinase (HSVtk). GL261 glioma cells transduced with this vector could be tracked and killed on command by the administration of the prodrug ganciclovir, either in vitro or after implantation into mouse brains. High levels of Angpt3 or sTie2 could be achieved with this vector; however, Angpt3 increased capillary destabilization and glioma growth, whereas sTie2 exerted no effect. Overall, this study helps to understand the importance of the Tie2 signaling pathway in glioma development and the role of Angpt3, but suggests that neither this molecule nor sTie2 are effective agents against malignant gliomas. This study also provides a lentiviral vector design for safer gene therapy.
A novel 1T1C capacitor structure for high density FRAM

In this paper, an etching damage-free 4 Mb ferroelectric random access memory (FRAM) integration technology was for the first time developed using ferroelectric (FE) hole capacitor structure. Since the PZT capacitors are not etched, no etching damage was generated in the novel capacitor structure. The etching process issue, which is one of most critical obstacles for scaling down FRAM device, is completely resolved by using this novel FE hole structure. Therefore, the novel integration technology strongly promises to provide a reliable scaling down of FRAM device beyond 0.25 /spl mu/m technology generation.
Non-linear dynamics of a whole vehicle finite element model using a harmonic balance method

The aim of this paper is to apply the Harmonic Balance Method (HBM) to a finite element model of a complete vehicle (body, engine and engine mounts) to calculate the non-linear response of the assembly. The non-linear effects come from the amplitude-dependent stiffness of the engine mounts. First, the HBM is presented. A condensation process on the non-linear degrees-of-freedom is also proposed. This process reduces the original non-linear system by focusing only on the solution of the non-linear equations associated with the system’s non-linear components. Second, the engine mount stiffness dependency with amplitude is measured on a test bench to estimate a polynomial stiffness law. Finally, the numerical analysis is performed to analyse the non-linear response of the whole vehicle using the HBM algorithm with appropriate condensation located only on the non-linear coordinates of the system to minimise computer time.
STUDY ON THE RESPONSE OF VIETNAMESE INDICA RICE VARIETIES TO Agrobacterium-MEDIATED TRANSFORMATION BY ASSAY OF TRANSIENT GENE EXPRESSION AND ON THE REGENERATION EFFICIENCY OF EMBRYOGENIC CALLI

The response of rice to Agrobacterium-mediated transformation is variety dependent; therefore it is needed to identify the potential varieties to be used for a successful transformation using Agrobacterium method. In this study, we evaluated the response of 51 Vietnamese indica rice varieties to Agrobacterium-mediated transformation by assay of the transient expression of the gusA gene. The gene expression was detected with the blue spots to emerge on the callus transformed with pTOK233 carrying gusA gene by Agrobacterium tumefaciens. There was a variation on the gene expression among the tested varieties. Based on the level of expression quantified by the percentage of calli showing GUS (blue spots), the tested varieties could be classified in five groups: very high, high, average, low and none expression. The potential varieties for transformation were identified and recommended for use in gene transfer by Agrobacterium. It was also noted that up to 28.07% of the tested varieties showed none expression. In this study, we also evaluated the regeneration ability of the embryogenic calli of seven indica varieties cultured onto four different media; each medium differed from the other in terms of plant hormone combination and a few other components like sugar. The results showed that the medium MSReg3 appeared to have the highest regeneration efficiency across the varieties. This medium contained basic MS medium supplemented with 20 gl -1 sucrose, 30 gl -1 sorbitol, 0.5 mgl -1 NAA and 2 mgl -1 BAP. The addition of sorbitol seemed to enhance the regeneration efficiency of indica
A Hybrid Short-Term Wind Speed Forecasting Model Based on Wavelet Decomposition and Extreme Learning Machine

This paper studied the short-term prediction of wind speed by means of wavelet decomposition and Extreme Learning Machine. Wind speed signal was decomposed into several sequences by wavelet decomposition to reduce the non-stationary. Secondly, the phase space reconstructed was used to mine sequences characteristics, and then an improved extreme learning machine model of each component was established. Finally, the results of each component forecast superimposed to get the final result. The simulation result verified that the hybrid model effectively improved the wind speed prediction accuracy.
Image Artifacts by Charge Pocket in Floating Diffusion Region on CMOS Image Sensors

Complementary metal-oxide-semiconductor (CMOS) image sensors (CIS) are widely used in applications such as mobile equipment, PC cameras, and portable digital cameras due to their low power consumption and low cost. Today, CIS pixel sizes are being continuously reduced, down to the 1.0 μm level in 90-nm CMOS, as industrial applications require higher pixel density. The industry requests, however, continued good performance even when the pixel dimensions are further reduced. In particular, dark current in CIS is an important parameter that determines the image performance in low light. The dark current component can change the charge capacity in photo diodes (PD) and hence the output signal as a function of location and time (J. P. Albert, 2001 and H.-S. Philip, 1998). An increase in dark current can also affect the dynamic range due to an increase in shot noise (H.Y.Cheng, 2003). By suppressing the dark current, the fixed pattern noise of the imager and the white pixel-defects can be reduced (K. A. Parulski, 1985). Photo diodes and pixel architecture of image sensors have been optimized to reduce image artifacts and hence dark current. (N. V. Loukianova, 2003; H.I.Kwon, 2004). The key technology feature for high image-quality CMOS image sensor is the formation of a low-leakage buried photodiode with a transfer gate (TG). The buried PD is a promising concept to reduce the dark current. Many researchers reported that the vicinity of the shallow-trench isolation (STI) to the PD is the main source of dark leakage. By designing and characterizing special diode test structures, H. I. Kwon et al. (2004) demonstrated that the dark leakage decreases as the distance between STI and PD increases. Takashi Watanabe et al. (2010) showed that dark current can be improvefd by avoiding charge diffusion injection from the PD to the substrate using an optimized well structure under the PD. The effects of area, perimeter, and corner on lekage were, however, not separately investigated. The buried floating diffusion (FD), on the other side of the pass transistor, was also studied by H.I. Kwon et al. (2004) and K. Mabuchi, et al. (2004). H.I. Kwon et al. (2004) explained that
Investigation of a Combustion Chamber Operation in Coal-firing Boiler Using Simulation Modeling Methods

One of the thermal power plants in Bulgaria firing imported coals is TPP “Ruse East”. In 1971 a mono block power unit with a waste heat boiler and nominal steam generation of 365 t/h and 110 MW electrical output turbine started operation. The exploitation of this power unit in present conditions requires compliance with a number of environmental standards as well as an assessment of its performance parameters. In-depth research of the processes in the combustion chamber depends on advanced methods such as computational simulation and also on conventional measurement tests. With the help of specialized software for combustion processes investigation an evaluation of the impact of different operational and structural influences on the coal burning degree and the generated concentrations of nitrogen oxides is performed.
On-line incipient fault detection of induction motors using artificial neural networks

This paper develops a novel approach for online detection of incipient faults in single phase squirrel-cage induction motors through the use of artificial neural nets (ANNs). Two of the most common types of incipient faults are indicated: stator winding fault and bearing wear under constant load torque conditions. From the description of motor dynamics, the nonlinear relation of motor parameters also indicated. Simulation results show that the application of ANN to fault diagnosis of motors is reliable. <<ETX>>
Optimal weatherization of low-income housing in the U.S. : a research demonstration project

This report describes and presents the results of the Community Service Administration's (CSA's) Optimal Weatherization Demonstration Research Project carried out by the National Bureau of Standards (NBS). The CSA/NBS demonstration installed both architectural (building shell) and mechanical systems building weatherization options, and achieved, when both types of options were used, an average reduction in space heating fuel consumption of 41 percent, at an average weatherization cost of $1,862 per house.
Experience with advanced instrumentation in a hot section cascade

The Lewis Research Center gas turbine Hot Section Test Facility was developed to provide a real engine environment with known boundary conditions for the aerothermal performance evaluation and verification of computer design codes. This verification process requires experimental measurements in a hostile environment. The research instruments used in this facility are presented, and their characteristics and how they perform in this environment are discussed. The research instrumentation consisted of conventional pressure and temperature sensors, as well as thin-film thermocouples and heat flux gages. The hot gas temperature was measured by an aspirated temperature probe and by a dual-element, fast-response temperature probe. The data acquisition mode was both steady state and time dependent. These experiments were conducted over a wide range of gas Reynolds numbers, exit gas Mach numbers, and heat flux levels. This facility was capable of testing at temperatures up to 1600 K, and at pressures up to 18 atm. These corresponded to an airfoil exit Reynolds number range of 0.5 x 10(6) to 2.5 x 10(6) based on the airfoil chord of 5.55 cm. The results characterize the performance capability and the durability of the instrumentation. The challenge of making measurements in hostile environments is also discussed. Themore » instruments exhibited more than adequate durability to achieve the measurement profile. About 70 percent of the thin-film thermocouples and the dual-element temperature probe survived several hundred thermal cycles and more than 35 hr at gas temperatures up to 1600 K. Within the experimental uncertainty, the steady-state and transient heat flux measurements were comparable and consistent over the range of Reynolds numbers tested. « less
High-temperature sputtered coatings for optical fiber

We have developed a magnetron sputter coating method to continuously coat silica optical fibers with a dual layer coating of Inconel 625 alloy and platinum. The coating process is performed on-line as the fiber is drawn to minimize the rapid strength degradation of the silica due to attack by moisture in the air. Because of the modular design of the sputter equipment, the process is well suited for the deposition of a wide variety of metals and is readily adapted for scale-up. Multimode optical fibers were produced with coatings up to 0.5 microns in thickness consisting of an adhesion layer of Inconel and an outer layer of platinum. The coatings are adherent and remain mechanically intact after thermal cycling between room temperature and 2000 degree(s)F in vacuum. Approximate tensile strengths of 145 to 290 Kpse have been measured. These attributes make this sputter coated fiber a promising candidate for use in high temperature environments.
Estimation of genetic variation in green tiger prawn,
 Penaeus semisulcatus
 by using random amplified polymorphic DNA, inter simple sequence repeat and simple sequence repeat markers

In this study, three molecular markers including random amplified polymorphic DNA (RAPD), inter simple sequence repeat (ISSR) and simple sequence repeat (SSR) were used to evaluate genetic variation of green tiger prawn Penaeus semisulcatus collected from two geographically isolated environments; located in the Manifa, Arabian Gulf, Saudi Arabia and Ataka, Suez Gulf, Egypt. Genetic parameters included the percentage of polymorphism (P%), effective alleles (Ne), Nei genetic diversity (H) and Shannon index (I), which were calculated based on molecular data. All three marker systems distinguished genetic variation of P. semisulcatus in various levels. The highest polymorphism (91.30%) was obtained with SSR, followed by ISSR (82.26%) and RAPD markers (62.04%), respectively. Our results indicate that SSR appeared to be the best suited molecular assay for assessing the genetic variation between genotypes of P. semisulcatus. The present study indicated that Manifa and Ataka genotypes were closely related. Moreover, the analysis of variability could require more than one DNA‐based molecular marker techniques.
Exploring the International Connectivity of Chinese Inventors in the Pharmaceutical Industry

This paper explores the integration of emerging countries into the global system of innovation, as a channel for their technological catch-up. Using data on the innovative activity in the Chinese pharmaceutical industry, we analyze the geographic dispersion of inventor networks linked to China, as a function of the characteristics of the innovative actors that coordinate their inventive work.
Magnetic Resonant Coupling for Magnetic Induction Wireless Communication

Abstract In the last decade, magnetic induction (MI) communication has drawn the attention of researchers to alternate the EM communication in some environments, such as the underground environment, littoral environment, underwater environment, and caves. By using MI communication, dynamic communication channel, large size antenna and multipath fading can be solved. However, the path loss of MI communication is too high, and limits its transmission range. In this paper, we combine the magnetic resonant coupling method, which is used for wireless power transfer, with the traditional MI communication to reduce the path loss and improve the transmission range. We analyze channel characteristics of this improved MI communication and compare these with those of traditional MI communication. We have also identified two key factors that can increase the receiving power, reduce the path loss, and increase the transmission range.
Patterns of environmental management in the Chilean manufacturing industry: An empirical approach

Purpose – The purpose of this paper is to allow environmental policy makers to identify the sort of problems and obstacles and the kind of influences that firms face from different economic actors, when trying to improve their environmental performance. It aims to identify the actions that are taken by firms to cope with more difficult environmental regulations. These will help the regulator in the design of strategies to foster environmental improvements by firms.Design/methodology/approach – This paper analyses some of the specific questions of an environmental management survey that was carried out in the manufacturing industry in Chile in 2001. A large number of variables from the survey were involved and they are hard to handle in such disaggregated terms. The factor analysis (FA) methodology is thus applied to reduce the information to a manageable number of variables.Findings – The results of the FA methodology provide the regulator with fewer dimensions to concentrate on when designing environment.