Cicadulina (Idyia) fijiensis Linnavuori (Hemiptera: Cicadellidae: Deltocephalinae: Macrostelini), a new leafhopper record for China

Cicadulina (Idyia) fijiensis Linnavuori, bisher nur aus dem paszifischen Raum und aus Nepal bekannt, wird hier erstmals für China angegeben. Neue intraspezfische Variabilität in den männlichen Genitalien der Art und von C. bipunctata (Melichar) werden diskutiert, einschließlich der Ähnlichkeiten einer Population dieser Art mit der pazifischen Art C. bimaculata (Evans). Abbildungen und ein Schlüssel zur Trennung der beiden chinesischen Arten weren vorgestellt.Cicadulina (Idyia) fijiensis Linnavuori, formally known only from the Pacific and Nepal, is reported for the first time from China. New intraspecific variation in the male genitalia of this species and C. bipunctata (Melichar) is discussed, including the similarity of a population of the latter species to the Pacific C. bimaculata (Evans). Figures and a key to separate the two Chinese species are provided

When Attackers Meet AI: Learning-empowered Attacks in Cooperative Spectrum Sensing

Defense strategies have been well studied to combat Byzantine attacks that aim to disrupt cooperative spectrum sensing by sending falsified versions of spectrum sensing data to a fusion center. However, existing studies usually assume network or attackers as passive entities, e.g., assuming the prior knowledge of attacks is known or fixed. In practice, attackers can actively adopt arbitrary behaviors and avoid pre-assumed patterns or assumptions used by defense strategies. In this paper, we revisit this security vulnerability as an adversarial machine learning problem and propose a novel learning-empowered attack framework named Learning-Evaluation-Beating (LEB) to mislead the fusion center. Based on the black-box nature of the fusion center in cooperative spectrum sensing, our new perspective is to make the adversarial use of machine learning to construct a surrogate model of the fusion center's decision model. We propose a generic algorithm to create malicious sensing data using this surrogate model. Our real-world experiments show that the LEB attack is effective to beat a wide range of existing defense strategies with an up to 82% of success ratio. Given the gap between the proposed LEB attack and existing defenses, we introduce a non-invasive method named as influence-limiting defense, which can coexist with existing defenses to defend against LEB attack or other similar attacks. We show that this defense is highly effective and reduces the overall disruption ratio of LEB attack by up to 80%

Plasmonic Thin Film Solar Cells

Thin film solar cell technology represents an alternative way to effectively solve the world’s increasing energy shortage problem. Light trapping is of critical importance. Surface plasmons (SPs), including both localized surface plasmons (LSPs) excited in the metallic nanoparticles and surface plasmon polaritons (SPPs) propagating at the metal/semiconductor interfaces, have been so far extensively investigated with great interests in designing thin film solar cells. In this chapter, plasmonic structures to improve the performance of thin film solar cell are reviewed according to their positions of the nanostructures, which can be divided into at least three ways: directly on top of thin film solar cell, embedded at the bottom or middle of the optical absorber layer, and hybrid of metallic nanostructures with nanowire of optical absorber layer

Biowall Development for the West Lafayette Public Library

A group of multidisciplinary Purdue students are working together to design, assemble, and install a Biowall in the Children’s section of the West Lafayette Public Library. A Biowall is a plant-based filter that improves Indoor Environmental Quality by cleaning indoor air and adding a natural aesthetic to the building space. Purdue has been developing Biowall technology since 2012, and this project involves redesigning it to fit into the available space at the library. The new Biowall design incorporates a watering mechanism that allows for children to get actively involved in maintaining the Biowall and learning about sustainability. This project also allowed university students to participate in the design process, manufacturing, and commissioning of the Biowall. Future add-ons to the design include a display to show current Indoor Environmental Quality, buttons to light different sections of the Biowall for an immersed learning experience. The project involved the participation of two student organizations, the American Society of Heating, Refrigerating & Air-Conditioning Engineers (ASHRAE) and Boiler Green Initiative (BGI). The students from these organizations were able to learn about the designing and assembly process, while also learning how a Biowall works. The team involved in the project includes Ph.D., Masters, and Undergraduate students. The students involved came from Mechanical Engineering, Mechanical Engineering Technology, Environmental Engineering, and Construction Management Technology. The project involves working with a community partner, West Lafayette Public Library, and working with Purdue Facilities Service Building (PSFB) to assemble the equipment. An undergraduate class also benefitted from the Biowall by leaning the commissioning process by taking measurements of the different components in the Biowall. Once assembled and tested at the Environmental Chamber in the Applied Energy Lab located at the Knoy Building, the Biowall will be moved and installed in the West Lafayette Public Library. The location allows for the public to learn about the research done by Purdue, the Biowall will be a tool for everyone to learn about the importance of Indoor Environmental Quality, contaminants in the indoor air, and plants that improve Indoor Air Quality. A website which includes more information about the Biowall will also be active with the installation of the Biowall, the website provides for more outreach opportunities. Detailed documentation will be provided to the Library with Standard Operating Procedures

Research and Development of 3D Module Design System in Nuclear Power Engineering

ABSTRACT In order to meet the requirement of independent research and development of modular technology in nuclear power project, a set of convenient and efficient 3D module design system is supplied to the designer with the support of CPR1000 and on the basis of module 3D design system researched and developed by PDMS 3D cooperative design platform. The function and applying effect of 3D module design system can be referred to the research of the second function of PDMS 3D cooperative design platform