Electricity-powered artificial root nodule.

Root nodules are agricultural-important symbiotic plant-microbe composites in which microorganisms receive energy from plants and reduce dinitrogen (N2) into fertilizers. Mimicking root nodules using artificial devices can enable renewable energy-driven fertilizer production. This task is challenging due to the necessity of a microscopic dioxygen (O2) concentration gradient, which reconciles anaerobic N2 fixation with O2-rich atmosphere. Here we report our designed electricity-powered biological|inorganic hybrid system that possesses the function of root nodules. We construct silicon-based microwire array electrodes and replicate the O2 gradient of root nodules in the array. The wire array compatibly accommodates N2-fixing symbiotic bacteria, which receive energy and reducing equivalents from inorganic catalysts on microwires, and fix N2 in the air into biomass and free ammonia. A N2 reduction rate up to 6.5 mg N2 per gram dry biomass per hour is observed in the device, about two orders of magnitude higher than the natural counterparts

Generation Y’s Behavioural Usage of Small Businesses’ Retail Websites in Canada

This research delves into the factors that influence Generation Y’s usage of Canadian small businesses’ retail websites in order to suggest how they can be attracted to use them more. Based on the Use of Technology Two (UTAUT2) theory, questionnaire survey and semi-structured interviews revealed linkages between Behavioural Intention, Habit, Facilitating Conditions and Use Behaviour with demographic variables moderating some relationships. Improving the website designs and social media marketing can entice Generation Y consumers

V2X Content Distribution Based on Batched Network Coding with Distributed Scheduling

Content distribution is an application in intelligent transportation system to assist vehicles in acquiring information such as digital maps and entertainment materials. In this paper, we consider content distribution from a single roadside infrastructure unit to a group of vehicles passing by it. To combat the short connection time and the lossy channel quality, the downloaded contents need to be further shared among vehicles after the initial broadcasting phase. To this end, we propose a joint infrastructure-to-vehicle (I2V) and vehicle-to-vehicle (V2V) communication scheme based on batched sparse (BATS) coding to minimize the traffic overhead and reduce the total transmission delay. In the I2V phase, the roadside unit (RSU) encodes the original large-size file into a number of batches in a rateless manner, each containing a fixed number of coded packets, and sequentially broadcasts them during the I2V connection time. In the V2V phase, vehicles perform the network coded cooperative sharing by re-encoding the received packets. We propose a utility-based distributed algorithm to efficiently schedule the V2V cooperative transmissions, hence reducing the transmission delay. A closed-form expression for the expected rank distribution of the proposed content distribution scheme is derived, which is used to design the optimal BATS code. The performance of the proposed content distribution scheme is evaluated by extensive simulations that consider multi-lane road and realistic vehicular traffic settings, and shown to significantly outperform the existing content distribution protocols.Comment: 12 pages and 9 figure

Induced Stem Cells as a Novel Multiple Sclerosis Therapy.

Stem cell replacement is providing hope for many degenerative diseases that lack effective therapeutic methods including multiple sclerosis (MS), an inflammatory demyelinating disease of the central nervous system. Transplantation of neural stem cells or mesenchymal stem cells is a potential therapy for MS thanks to their capacity for cell repopulation as well as for their immunomodulatory and neurotrophic properties. Induced pluripotent stem cell (iPSC), an emerging cell source in regenerative medicine, is also being tested for the treatment of MS. Remarkable improvement in mobility and robust remyelination have been observed after transplantation of iPSC-derived neural cells into demyelinated models. Direct reprogramming of somatic cells into induced neural cells, such as induced neural stem cells (iNSCs) and induced oligodendrocyte progenitor cells (iOPCs), without passing through the pluripotency stage, is an alternative for transplantation that has been proved effective in the congenital hypomyelination model. iPSC technology is rapidly progressing as efforts are being made to increase the efficiency of iPSC therapy and reduce its potential side effects. In this review, we discuss the recent advances in application of stem cells, with particular focus on induced stem/progenitor cells (iPSCs, iNSC, iOPCs), which are promising in the treatment of MS

Marketing strategy of organic agricultural products on e-commerce platforms

With the strong growth of China economy in the dozens of years, there has been increasing demand of products and services of high quality from Chinese consumers with rising salary and disposable income. Despite recent concerns of economy slowdown and softening currency, Chinese consumer confidence still keep upbeat and resilient with strong interest of shifting spending to premium segment. This trend is especially phenomenal when it comes to spending on agricultural products. Chinese consumers tend to choose products with clear and credible indication of Non-GMO and organic label. However, despite of strong demand, it has been a long existing challenge of insufficient supply of organic products in China agricultural market without a well-guarded and reliable system of quality assurance. With E-Commerce platform, a new advent of technology that bridges supply and demand of niche and emerging segment, more opportunities are exposed to both consumers and suppliers in increasing the outreach of organic agricultural products and consumers willing to pay extra. This study analyses pricing, branding and distribution strategy for organic agricultural products and devises a portfolio of integrative marketing strategies and tactics that is applicable in the new era of digital marketing, built from the case of JD.com, one of the largest B2C E-commerce platform in China

Hierarchical Attention Network for Visually-aware Food Recommendation

Food recommender systems play an important role in assisting users to identify the desired food to eat. Deciding what food to eat is a complex and multi-faceted process, which is influenced by many factors such as the ingredients, appearance of the recipe, the user's personal preference on food, and various contexts like what had been eaten in the past meals. In this work, we formulate the food recommendation problem as predicting user preference on recipes based on three key factors that determine a user's choice on food, namely, 1) the user's (and other users') history; 2) the ingredients of a recipe; and 3) the descriptive image of a recipe. To address this challenging problem, we develop a dedicated neural network based solution Hierarchical Attention based Food Recommendation (HAFR) which is capable of: 1) capturing the collaborative filtering effect like what similar users tend to eat; 2) inferring a user's preference at the ingredient level; and 3) learning user preference from the recipe's visual images. To evaluate our proposed method, we construct a large-scale dataset consisting of millions of ratings from AllRecipes.com. Extensive experiments show that our method outperforms several competing recommender solutions like Factorization Machine and Visual Bayesian Personalized Ranking with an average improvement of 12%, offering promising results in predicting user preference for food. Codes and dataset will be released upon acceptance

How Social Experience Encourages Donation Intention to Charitable Crowdfunding Projects on Social Media: Empathy and Personal Impulsiveness

Embedding charitable crowdfunding into social media is a new practice that encourages prosocial behaviors. The rich social experience in charitable crowdfunding on social media distinguishes this context from other conventional contexts like charity fundraising websites. Specifically, this study incorporates social experience, empathy and personal impulsiveness to investigate donation intention in this new context. By analyzing survey data collected in China, this study finds that empathy mediates the effects of interaction with fundraiser and perceived proximity with donatee on a user’s donation intention. Social influence on social media platform is found to have positive influences on empathy and on donation intention. This study also investigates how empathy’s influence on donation intention varies by personal impulsiveness. It contributes to extant literature by highlighting the mediating role of empathy and the moderating role of personal impulsiveness. It also provides practical insights to encourage pro-social behaviors