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GNSS L5/E5a Code Properties in the Presence of a Blanker
No full textModern global navigation satellite system L5/E5a code families offer improved correlation properties, with lower auto-correlation sidelobes and cross-correlations, compared with legacy Global Positioning System L1 coarse/ acquisition (C/A) codes. However, these codes encounter unique L5/E5a interference environments, particularly those including interference due to pulses from distance-measuring equipment and tactical air navigation systems. In civil aviation, temporal blanking is the assumed countermeasure. In temporal blanking, incoming samples are set to zero when the peak envelope power exceeds a threshold, blanking the codes within the sampled signals and affecting their correlation with non-blanked replicas. Through extensive simulations, this study analyzes L5/E5a code properties under blanking duty cycle (bdc) values of 0%-75% over a 1-ms integration time. Results indicate reduced auto-correlation and cross-correlation protections, although these effects remain superior to those of L1 C/A codes until bdc reaches approximately 60%. Further increases in bdc to 75%, likely due to increasing air traffic, diminish these advantages. Additionally, simulations show that Doppler residuals have a minimal impact on L5/E5a correlation properties.
Neural Face Skinning for Mesh-agnostic Facial Expression Cloning
No full textAccurately retargeting facial expressions to a face mesh while enabling manipulation is a key challenge in facial animation retargeting. Recent deep-learning methods address this by encoding facial expressions into a global latent code, but they often fail to capture fine-grained details in local regions. While some methods improve local accuracy by transferring deformations locally, this often complicates overall control of the facial expression. To address this, we propose a method that combines the strengths of both global and local deformation models. Our approach enables intuitive control and detailed expression cloning across diverse face meshes, regardless of their underlying structures. The core idea is to localize the influence of the global latent code on the target mesh. Our model learns to predict skinning weights for each vertex of the target face mesh through indirect supervision from predefined segmentation labels. These predicted weights localize the global latent code, enabling precise and region-specific deformations even for meshes with unseen shapes. We supervise the latent code using Facial Action Coding System (FACS)-based blendshapes to ensure interpretability and allow straightforward editing of the generated animation. Through extensive experiments, we demonstrate improved performance over state-of-the-art methods in terms of expression fidelity, deformation transfer accuracy, and adaptability across diverse mesh structures.
COMPUTER SYSTEM FOR INTELLIGENT STRESS PREDICTION AND MANAGEMENT BASED ON SMARTPHONE DATA, AND METHOD OF THE SAME
No full text다양한 실시예들은 스마트폰 데이터 기반 지능형 스트레스 예측 및 관리를 위한 컴퓨터 시스템 및 그의 방법에 관한 것으로, 미리 정해진 기간 동안 사용자에 의해 입력되는 스트레스 자가 보고 데이터를 기반으로, 사용자에 대해 개인화된 스트레스 예측 모델을 구축하고, 개인화된 스트레스 예측 모델을 이용하여, 사용자의 스트레스를 이해 및 관리하도록 구성될 수 있다. 다양한 실시예들에 따르면, 사용자의 스트레스를 이해 및 관리하기 위해, 개인화된 스트레스 예측 모델을 이용하여, 사용자의 스트레스를 예측하고, 사용자의 스트레스 해소를 돕기 위한 스트레스 중재 방안을 설정 및 제공하고, 사용자의 날짜 별 스트레스 수준을 캘린더 형태로 제공할 수 있다
A Multi-Rectenna, Single-Output, Power Combine-and-Regulate Boost Converter for 5.8GHz Wireless Power Receiver Achieving 3.1W Over 50m-Distance
Get PDFThis paper presents a multi-input single-output power combine-and-regulate (MISO-PCR) converter chip for a 5.8GHz WPT receiver (Rx). The MISO-PCR simultaneously collects, combines, and converts the multiple power from 30 GaAs rectennas into a single regulated output (28V). Fabricated in a 180nm BCD, the chip enables the Rx system—paired with a beamforming Tx—to deliver a 3.1 W power at a 50m distance
OPTOELECTRONIC DEVICE WITH SURFACE TREATED PEROVSKITE LAYER
No full text본 개시는 표면처리 페로브스카이트층을 포함하는 광소자에 관한 것이다. 표면처리 페로브스카이트층을 포함하는 광소자는 제1 전극, 제1 전극 상에 형성된 제1 전하수송층, 제1 전하수송층 상에 형성되는 페로브스카이트층, 페로브스카이트층 상에 형성된 제2 전하수송층, 제2 전하수송층 상에 형성된 제2 전극을 포함하고, 페로브스카이트층의 표면을 포스폰산(phosphonic acids)으로 표면 처리한다
Virtual language exchange for STEM students: Enhancing cross-cultural communication
No full textThis proposal presents the outcomes of a virtual language exchange program between an American culture course at a Korean science and engineering university (UK-SE) and a Korean language course at an American science and engineering university (UA-SE). The program aimed to foster cross-cultural understanding, improve language skills, and build rapport between the Korean and American university students.
Virtual language exchange programs (VLEP) have become increasingly significant in promoting language acquisition and intercultural competence, especially in academic contexts. Such exchanges offer students authentic opportunities to practice languages in real-time, regardless of geographical boundaries. Research suggests that virtual exchanges not only enhance language proficiency but also promote cultural empathy and adaptability. Furthermore, studies highlight the importance of technological platforms in facilitating meaningful and effective interactions. However, there are few studies on VLEP on Korean and American university students, and no studies have been reported on VLEP on Korean and American science and engineering (SE) students in particular.
The primary objectives of this study were to (1) enhance participants' language proficiency in English and Korean through interactive virtual exchanges; (2) foster intercultural understanding and cross-cultural communication skills through online interactions; (3) create a digital platform for building interpersonal relationships and cultural rapport across geographical boundaries; and (4) assess the effectiveness of virtual language exchange as a pedagogical tool within credit courses.
The program involved 21 UK-SE students and 15 UA-SE students participating as part of their credit courses. Throughout the semester, six virtual sessions were held, each lasting 30 minutes—15 minutes in Korean and 15 minutes in English—focusing on discussion topics designed to promote intercultural understanding such as popular food, dating culture and living in Korea/the U.S. A post-program survey assessed participant satisfaction and perceived skill development. The survey collected responses from 19 UK-SE and 14 UA-SE students.
The survey results demonstrated high satisfaction levels and significant perceived improvements in various aspects: Overall Satisfaction: UK-SE (4.21/5.00), UA-SE (4.57); Discussion Topics Satisfaction: UK-SE (4.10/5.00), UA-SE (4.07); Language Skill Improvement: UK-SE (3.53/5.00), UA-SE (3.79); Cultural Understanding: UK-SE (4.10/5.00), UA-SE (4.14) and Willingness to Participate Again: UK-SE (4.16/5.00), UA-SE (4.71/5)
The VLEP at the SE institutions proved to be a successful educational initiative, enhancing linguistic competencies, intercultural communication, and cross-cultural relationships among participants. While both groups reported overall satisfaction and skill improvements, the slightly lower scores in language proficiency suggest the need for more targeted language practice components. This study reinforces the value of integrating VLEPs into academic curricula to promote global competence and mutual understanding among students from diverse cultural backgrounds. Educators interested in developing VLEPs will find the session valuable and informative
PSIJ based Integrated Power Integrity Design for HBM using Reinforcement Learning: Beyond the Target Impedance
No full textHydrogen-dependent dissimilatory nitrate reduction to ammonium enables growth of Campylobacterota isolates
No full textDissimilatory nitrate reduction to ammonium (DNRA) is a key process used by diverse microorganisms in the global nitrogen cycle. For long, DNRA has been considered primarily as an organotrophic reaction, despite evidence that oxidation of inorganic electron donors also supports DNRA. Evidence of DNRA coupling with molecular hydrogen (H2) oxidation has been reported for several microbial isolates; however, the underlying physiology of the microbial process remains understudied. In this study, we report the isolation of two Campylobacterota strains, Aliarcobacter butzleri hDNRA1 and Sulfurospirillum sp. hDNRA2, which grow using H2 as the sole electron donor for DNRA, and physiological insights gained from a close examination of hydrogenotrophic DNRA in these isolates. In both batch and continuous cultures, DNRA sensu stricto (i.e. NO3- reduction that includes stoichiometric NO2--to-NH4+ reduction) was strictly dependent on the presence of H2 and exhibited stoichiometric coupling with H2 oxidation, indicating that electrons required for NO2- reduction were unequivocally derived from H2. Successful chemostat incubation further demonstrated that hydrogenotrophic DNRA is viable under NO3--limiting, H2-excess conditions. Genomic and transcriptomic analyses identified group 1b [NiFe]-hydrogenase and cytochrome c552 nitrite reductase as the key enzymes catalyzing hydrogenotrophic DNRA. In addition, metagenomic surveys revealed that bacteria capable of hydrogenotrophic DNRA are taxonomically diverse and abundant in various ecosystems, particularly in the vicinity of deep-sea hydrothermal vents. These findings, integrating physiological, genomic, and transcriptomic analyses, clarify that H2 can solely serve as a growth-supporting electron donor for DNRA and suggest potential significance of this microbial process in nitrogen- and hydrogen-related environmental biogeochemical cycles.