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2681.全球公司网络会议市场报告(2015-2019年)
[信息传输、软件和信息技术服务业,科学研究和技术服务业] [2015-09-14]
Online corporate meetings in enterprises have changed the method of business communication.
关键词:网络会议;线上会议;商务模式
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2682.通过动态生态系统发展促进纳米生物技术商业化:桥接创新政策、利益相关者和知识
[科学研究和技术服务业] [2015-09-08]
The application of nanotechnology in the field of biology has given rise to a host of innovations ranging from diagnostics, biomedical sensors, targeted drug delivery systems, to the creation of integrated chips with scalable memory. Recently, increased investments in basic nanotechnology research and demand for improved convergence based product development, have led to the organization of national innovation ecosystems such as the National Nanotechnology Initiative in the United States, National Nanotechnology Initiative and associated National Nanotechnology Centre in Malaysia and the Australia Nanotechnology Network in Australia to name a few. While academic laboratories and spin-offs have served as epicenters of nanobiotechnology commercialization across these countries, the extent of commercialization of products across developed and emerging economies is largely driven by the maturity of innovation networks and knowledge flows surrounding the nanobiotechnology initiatives. In the wake of the global market challenges of the biopharmaceuticals, successful deployment of nanobiotechnology innovations in regional economies will depend on inclusive and adaptable innovation models that can be replicated globally. To that end, this commentary discusses the design of a hybrid innovation ecosystem that captures nanotechnology policy, stakeholders, and knowledge to facilitate accelerated nanobiotechnology commercialization. Examples of innovation ecosystems in the US, Malaysia and Australia are used to demonstrate the emergence of this hybrid model where research and human capacity development including knowledge dissemination between the participating stakeholders, are the overarching goals of the designed ecosystems. Objective of Commentary: In the context of the limitations of existing innovation models as static entities that have failed to accelerate innovation and commercialization of nanotechnology innovations in medicine, an adaptable hybrid ecosystem or AHE for effective commercialization of nanomedicine and emerging technologies is proposed . The adaptable hybrid ecosystem builds upon the concepts of National Systems of Innovation, Triple Helix Model and strategic arenas-a broad area of focus that engages contributions from multidisciplinary areas. The multistakeholder participatory approach of the AHE model is suggestive of a dynamic asset pool comprising customers, industries, universities and international governments that enable technology commercialization in emerging areas such as nanomedicine and nanotechnology by the influence of fundamental paradigm shifts discussed in this paper.
关键词:芯片设备;创新三螺旋模型;混合模型
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2683.金砖四国生物识别技术市场报告(2015-2019年)
[科学研究和技术服务业,信息传输、软件和信息技术服务业] [2015-09-06]
A rise in instances of security breaches and transactional fraud in many sectors has increased the need for reliable authentication and identification systems. Biometrics are based on the unique behavioral and physiological characteristics of an individual, which are difficult to replicate. They authenticate an individual through voice recognition, palm geometry, DNA identification, gait recognition, fingerprint matching, facial recognition, iris recognition, signature verification, and vein recognition. Biometric technologies are considered to be more reliable than checks that use physical devices or numeric authentication codes. With advances in hardware, sensors, readers, pattern recognition, and signal and image processing technologies, a number of biometric.
关键词:安全漏洞;交易欺诈;身份验证;识别系统;生物识别技术;独特的行为;生理特点;信号和图像;处理技术
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2684.转基因微藻生物燃料生产的优化
[电力、热力、燃气及水生产和供应业,科学研究和技术服务业] [2015-09-02]
We have compared the proteomes and transcriptomes of Chlorella induced to produce oil in the presence of glucose at various time points. These results lead to the identification of several proteins when over-expressed in transgenic algae enhance photosynthesis by up to 80%. We have also completed the proteome analysis for the diatom Cyclotella when induced to accumulate oil after silicon starvation. The results of these studies are currently being analyzed. We have completed generation of Chlamydomonas transformants expressing carbonic anhydrase to increase the CO2 concentration near the active site of Rubisco so as to inhibit photorespiration. These transgenics have on average a 30% increase in photosynthetic rates. We have also show that by reducing chlorophyll b levels we can tune the light harvesting antennae size for increased photosynthetic efficiency and growth (30% increase) in algal monocultures. Finally, we have demonstrated that the biocompatible solvent, decane, rapidly induces oil accumulation in Chlorella shortening the time to produce oil with a glucose boost from 24 to 2 hours. This process also elevates oil accumulation in single cells in addition to autospores. As a result oil accumulation is increased 10X relative to glucose alone within the first 4 hours after treatment.
关键词:藻类;燃料;基因工程;二氧化碳;碳酸酐
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2685.二氧化钛纳米颗粒和纳米结构的光催化应用
[科学研究和技术服务业,化学原料和化学制品制造业,电气机械和器材制造业] [2015-09-02]
Titanium dioxide (TiO_2) is the most intensely investigated photocatalyst and until today the only one that has already been commercialized and that is involved in many applications such as self-cleaning materials, dye-sensitized solar cells, as well as water and air purification. Consequently, an exponential growth of research activities concerning the nanoscience and nanotechnology of TiO_2 has been observed during the last decades. These raising research activities have recently lead to the synthesis of nanosized TiO_2 nanoparticles and nanostructures with different shapes, morphologies and phase compositions. Thus, the present chapter focuses mainly on the synthesis of these nanomaterials. The thermodynamic stability, the transition between different TiO_2 polymorphs and the surface properties of these polymorphs are presented with the aim to utilize this information for a better understanding of the mechanism of the formation of TiO_2 nanomaterials. The photocatalytic applications of these TiO_2 nanomaterials are also discussed.
关键词:电池材料;光催化剂;纳米材料
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2686.子兆电子伏C_(60)离子无定形Si3N4薄膜的离子轨道
[电气机械和器材制造业,科学研究和技术服务业] [2015-09-02]
When an energetic ion passes through a material, an ion track may be produced along the ion path if the electronic stopping power S_e is larger than a material dependent threshold value. Although there are a number of studies on the ion tracks produced in crystalline materials using transmission electron microscopy (TEM), there are only a limited number of TEM studies on the ion tracks in amorphous materials due to a lack of sufficient contrast. In this report, the ion tracks in amorphous Si_3N_4 films irradiated with 120-720 keV C_(60)~(+,2+) ions were observed with TEM and high-angle annular dark field scanning transmission electron microscopy (HAADF-STEM). The radial density distribution of the ion track was derived from the observed HAADF-STEM images.
关键词:电池材料;化学反应;离子轨道
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2687.金属纳米粒子的催化应用
[科学研究和技术服务业,电气机械和器材制造业] [2015-09-02]
Nanostructured materials have attracted great attention in recent time because of their innovative characteristics and potential applications in the fields of catalysis, drug delivery, sensors and pollution abatement measures. Stabilized metal nanoparticles (size < 10 nm) with very active surface atoms, high selectivity and recyclability have lead to a new generation of 'Nanocatalysts' for sustainable green chemistry for industrial applications like fine and bulk chemicals, Pharmaceuticals, fuel cell, petroleum refineries, environmental catalysis and many other fields. The present chapter summarizes the techniques for preparations, characterizations, and catalytic activities of different metals nanoparticles for organic transformations.
关键词:新型电池;燃料电池;纳米材料
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2688.光噪星体中X射线光谱的来源
[科学研究和技术服务业] [2015-09-02]
Gamma-ray luminosities of some quasar-associated blazars imply jet powers reaching values comparable to the accretion power even if assuming very strong Doppler boosting and very high efficiency of gamma-ray production. With much lower radiative efficiencies of protons than of electrons, and the recent reports of very strong coupling of electrons with shock-heated protons indicated by Particlein- Cell (PIC) simulations, the leptonic models seem to be strongly favored over the hadronic ones. However, the electron-proton coupling combined with the ERC (External-Radiation-Compton) models of gamma-ray production in leptonic models predict extremely hard X-ray spectra, with energy indices (alpha(sup x)) approximately 0. This is inconsistent with the observed 2-10 keV slopes of blazars, which cluster around (alpha(sup x)) approximately 0.6. This problem can be resolved by assuming that electrons can be efficiently cooled down radiatively to non-relativistic energies, or that blazar spectra are entirely dominated by the SSC (Synchrotron-Self Compton) component up to at least 10 keV.
关键词:类星体;X射线谱;加速;伽玛源
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2689.裂变反应碎片行进波直接能量转换的可行性
[科学研究和技术服务业] [2015-09-02]
Fission fragment direct energy conversion has been considered in the past for the purpose of increasing nuclear power plant efficiency and for advanced space propulsion. Since the fragments carry electric charge (typically in the order of 20 e) and have 100 MeV-range kinetic energy, techniques utilizing very high-voltage DC electrodes have been considered. This study is focused on a different approach: the kinetic energy of the charged fission fragments is converted into alternating current by means of a traveling wave coupling scheme (Traveling Wave Direct Energy Converter, TWDEC), thereby not requiring the utilization of high voltage technology.
关键词:能量转换;片段;行波;;粒子能量;原子核裂变
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2690.以人在环的约束最小二乘模式的比较用于仿真的光谱分离的比较来确定地球同步轨道的材料类型
[科学研究和技术服务业] [2015-09-01]
Spectral reflectance data through the visible regime was collected at Las Campanas Observatory in Chile using an imaging spectrograph on one of the twin 6.5-m Magellan telescopes. The data were obtained on 1-2 May 2012 on the 'Landon Clay' telescope with the LDSS3 (Low Dispersion Survey Spectrograph 3). Five pieces of Geosynchronous Orbit (GEO) or near-GEO debris were identified and observed with an exposure time of 30 seconds on average. In addition, laboratory spectral reflectance data was collected using an Analytical Spectral Device (ASD) field spectrometer at California Polytechnic State University (Cal Poly) in San Luis Obispo on several typical common spacecraft materials including solar cells, circuit boards, various Kapton materials used for multi-layer insulation, and various paints. The remotely collected data and the laboratory-acquired data were then incorporated in a newly developed model that uses a constrained least squares method to unmix the spectrum in specific material components. The results of this model are compared to the previous method of a human-in-the-loop (considered here the traditional method) that identifies possible material components by varying the materials and percentages until a spectral match is obtained. The traditional model was found to match the remotely collected spectral data after it had been divided by the continuum to remove the space weathering effects, or a reddening of the materials. The constrained least-squares model also used the de-reddened spectra as inputs and the results were consistent with those obtained through the traditional method. For comparison, a first-order examination of including reddening effects into the constrained least-squares model will be explored and comparisons to the remotely collected data will be examined. The identification of each object s suspected material component will be discussed herein.
关键词:空间碎片;光谱反射率;同步轨道;最小二乘法