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arXiv 2024年

作者： Avila, Bryant Augusto, Pedro Phillips, David Gili, Tommaso Zimmer, Manuel Makse, Hernán A. Levich Institute and Physics Department City College of New York New YorkNY10031 United States Vienna Austria Vienna Biocenter PhD Program Doctoral School the University of Vienna Medical University of Vienna Vienna Austria Mechanical Engineering Department University of New Mexico AlbuquerqueNM87131 United States Networks Unit IMT Scuola Alti Studi Lucca Piazza San Francesco 15 Lucca55100 Italy Department of Radiology Neuroradiology Service Memorial Sloan Kettering Cancer Center New YorkNY10065 United States CUNY Neuroscience Graduate Center City University of New York New YorkNY10031 United States

Understanding the dynamical behavior of complex systems from their underlying network architectures is a long-standing question in complexity theory. Therefore, many metrics have been devised to extract network features like motifs, centrality, and modularity measures. It has previously been proposed that network symmetries are of particular importance since they are expected to underly the synchronization of a system’s units, which is ubiquitously observed in nervous system activity patterns. However, perfectly symmetrical structures are difficult to assess in noisy measurements of biological systems, like neuronal connectomes. Here, we devise a principled method to infer network symmetries from combined connectome and neuronal activity data. Using nervous system-wide population activity recordings of the *** backward locomotor system, we infer structures in the connectome called fibration symmetries, which can explain which group of neurons synchronize their activity. Our analysis suggests functional building blocks in the animal’s motor periphery, providing new testable hypotheses on how descending interneuron circuits communicate with the motor periphery to control behavior. Our approach opens a new door to exploring the structure-function relations in other complex systems, like the nervous systems of larger animals. © 2024, CC BY.

关键词： Synchronization

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New paradigm to understanding turbidite sediment in Banyumas basin

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AIP Conference Proceedings 2019年第1期2094卷

作者： Eko Bayu Purwasatriya Sugeng Sapto Surjono D. Hendra Amijaya 1Geological Engineering Faculty of Engineering Universitas Jenderal Soedirman Jl. Mayjen Sungkono Km.5 Blater Purbalingga Indonesia 2Doctoral Program Student of Geological Engineering Department Faculty of Engineering Universitas Gadjah Mada Jl. Grafika No.2 Yogyakarta Indonesia 3Geological Engineering Department Faculty of Engineering Universitas Gadjah Mada Jl. Grafika No.2 Yogyakarta Indonesia

Banyumas basin is one of sedimentary basin in Central Java. Based on surface geological mapping we can found many turbidite sediment in this area. Turbidite sediment is a sedimentary rocks with certain sedimentary structure such as graded bedding, paralel lamination, cross lamination or wavy lamination. Turbidite sediment formed by turbidity current which is caused by the existing of a slope. Several depositional environment which is have a slope can be a candidate as depositional environment of turbidite sediment in Banyumas Basin. Previous researcher always refer it to submarine fan depositional environment, because it is believed that Banyumas is a deep marine in the past time. But in the recent research, we found a buried volcanic arc in the middle of Banyumas Basin, that means there are several volcano formed at the middle of sea in the past time. Turbidity current cause by the slope of volcano’s flank not the submarine slope. So the new paradigm to understanding the turbidite sediment in Banyumas Basin is Flysch and molasse turbidite sediment. Flysch is a turbidite sediment related to an orogenic process or the birth of a volcano, and molasse is a turbidite sediment related to reworked process of a volcano, such as weathering, erosion, transportation and then re-sedimentation.

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REDUCTION METHOD OF TRACKING ERRORS DUE TO MULTIPATH WAVES IN DIRECT SEQUENCE SPREAD SPECTRUM SYSTEMS.

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Electronics and Communications in Japan, Part I: Communications (English translation of Denshi Tsushin Gakkai Ronbunshi) 1987年第9期70卷 118-126页

作者： Maruyama, Satoshi Iwanami, Yasunori Ikeda, Tetsuo Faculty of Engineering Nagoya Institute of Technology Nagoya Japan 486 Satoshi Maruyama graduated 1983 Dept. Electrical Eng. Fac. Eng. Nagoya Inst. Technology. Completed Master's program 1985 Grad. School and affiliated with Fujitsu Co. Engaged in researches in distance measurement by spread spectrum technique. Tetsuo Ikeda graduated 1961 Dept. Comm. Eng. Fac. Eng. Tohoku University. Completed doctoral program 1966 Grad. School. Assistant 1966 and Assoc. Prof. 1968 Fac. Eng. Tohoku University. Assoc. Prof. 1973 and Prof. 1977 Nagoya Inst. Technology. Engaged in researches in network theory computer networks communication system and electromagnetic environment. Doctor of Eng. Member I.E.E.E. Japan TV Soc. Jap. Inf. Proc. Soc. Jap. Soc. Inf. Comm. and I.E.E.E.

The spread spectrum (SS) communication is a communication system which has excellent characteristics against noise and is suited to the code-division multiplex. This paper describes a method which reduces the tracking phase error in DLL due to multipath waves in SS communication system. The method is based on the model with a single multipath wave.

关键词： RADIO TRANSMISSION

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INTERCOMPARTMENTAL FLUID SHIFTS IN HEMODIALYSIS-PATIENTS

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BIOTECHNOLOGY PROGRESS 1987年第2期3卷 69-73页

作者： HEINEKEN, FG EVANS, MC KEEN, ML GOTCH, FA COBE Laboratories Inc. Lakewood Colorado Fred G. Heineken is currently Program Director for Biotechnology within the Emerging Engineering Technologies Division of the Engineering Directorate of the National Science Foundation. He received his B.Sc. degree in Chemical Engineering from Northwestern University and his Ph.D. degree in the same discipline from the University of Minnesota. His work experience includes fermentation research at Monsanto teaching and research in respiration physiology at the University of Colorado and hemodialysis product design and evaluation at COBE Laboratories. Hemodialysis Treatment and Research Center Franklin Hospital Ralph K. Davis Medical Center San Francisco California Mary C. Evans has a BS degree in Chemistry from the University of Florida. She has held positions in the artificial kidney development group at Dow Chemical Company and the new product development group of Cordis-Dow Corporation. She is currently working in clinical research in the Hemodialysis Treatment & Research Center at Franklin Hospital in San Francisco. Marcia Keen is currently a doctoral student at the University of California San Francisco and serves as Clinical Research Supervisor at the Hemodialysis Treatment & Research Center at Franklin Hospital in San Francisco. She received her MS at the University of California San Francisco. Her thesis research developed a non-invasive Doppler technique to quantitate vascular access graft flow in hemodialysis patients. Her research interests include physiologic responses to dialysis therapy manipulations. Frank Gotch is an Associate Clinical Professor of Medicine at the University of California San Francisco. He received his BA and MD from the University of California and is currently Medical Director of the Hemodialysis Treatment & Research Center at Franklin Hospital in San Francisco. His research has addressed such issues as adequacy of dialysis and mathematical modeling of hemodialysis and associated therapies. He is a past president of the American

Hemodialysis is a therapeutic procedure for replacing some functions of the natural kidney. As such, it is capable of allowing people with little or no residual kidney function to survive and in some cases to lead productive lives. There are, unfortunately, a number of side effects associated with this procedure (shock, muscle cramps, fatigue, etc.). In order to minimize these side effects, we have undertaken to model shifts of fluid between the intracellular and extracellular fluid spaces in hemodialysis patients. Fluid shifts are primarily a function of osmolality differences between these fluid spaces. Changes in osmolality are caused mainly by changes in urea and salt concentrations. Least squares analysis of patient data has been used to estimate the appropriate ultrafiltration and urea mass transfer coefficients for each patient. The model has then been used to find a dialysate sodium concentration profile that will minimize fluid shifts into and out of the intracellular fluid space.

关键词： BIOMEDICAL EQUIPMENT

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Thermal Activiation of Sr3Fe2O7 Electrocatalysts for Water Oxidation at Neutral pH

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ECS Transactions 2014年第22期61卷

作者： Toshihiro Takashima Koki Ishikawa Hiroshi Irie Clean Energy Reseach Center University of Yamanashi Special Doctoral Program for Green Energy Conversion Science and Technology Interdisciplinary Graduate School of Medicine and Engineering University of Yamanashi Japan Science and Technology Agency (JST) Core Research for Evolutionary Science and Technology (CREST Clean Energy Research Center University of Yamanashi

The Ruddlesden-Popper-type layered perovskite strontium ferrite (Sr3Fe2O7) was studied as an electrocatalyst for water oxidation to molecular oxygen (O2). The electrocatalytic activity of Sr3Fe2O7 was found to be dependent on the temperature, and the overpotential for water oxidation was markedly lower at 70 oC than at 30 oC. Namely, at pH 7, O2 evolution initiated with overpotentials of approximately 100 and 300 mV at 70 and 30 oC, respectively. When lanthanum-substituted Sr3Fe2O7, Sr2.6La0.4Fe2O7, was used to catalyze O2 evolution, the distinctive temperature dependence disappeared and O2 evolution was driven with a low overpotential even at 30 oC. These results suggest that the formation of Fe4+ is important for decreasing the overpotential for water oxidation to produce O2.

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NUMERICAL METHOD FOR ANALYZING TRANSIENT AND STEADY STATES OF SINE WAVE OSCILLATOR CIRCUIT WITH STIFFNESS.

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Electronics and Communications in Japan, Part I: Communications (English translation of Denshi Tsushin Gakkai Ronbunshi) 1987年第10期70卷 1-11页

作者： Okumura, Kohshi Kishima, Akira Yasuda, Hisashi Faculty of Engineering Kyoto University Kyoto Japan 606 Kohshi Okumura graduated 1966 Dept. Electrical Eng. Fac. Eng. Kyoto University. Completed doctoral program 1971 Grad. School and Assistant Kyoto University. Doctor of Engineering. Presently Lecturer Dept. Electrical Eng. Engaged primarily in researches in nonlinear circuits lightning surge performance hysteresis characteristics and so forth. Member IEEJ IECEJ and IEEE. Hisashi Yasuda graduated 1981 Dept. Electrical Eng. Fac. Eng. Kyoto University. Completed Master's program 1983 Grad. School. Presently with Nippon Steel Co. Ltd. Member IECEJ. Nippon Steel Corporation Kitakyushu Japan 805 Akira Kishima graduated 1951 Dept. Electrical Eng. Fac. Eng. Kyoto University. Completed Grad. School 1956. Assoc. Prof. Presently Prof. Dept. Electrical Eng. Fac. Eng. Kyoto University. Doctor of Eng. Engaged in researches in electrical circuit power circuit and systems.

This paper proposes a method for analyzing the transient and steady states of a sine wave oscillator circuit with reactive elements which have large differences in their values. The circuit equation is represented by an autonomous nonlinear differential equation with the values of these elements. First, we describe the method for solving numerically the differential equation regardless of the stiffness by the asymptotic method developed by Krylov, Bogolyubov and Mitropolskiy. Second, we present the method for obtaining solutions of the differential equation with regard to the stiffness by combining the asymptotic method with numerical integration.

关键词： OSCILLATORS

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Architecting a missile system for navy theater ballistic missile defense

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NAVAL ENGINEERS JOURNAL 1997年第3期109卷 373-380页

作者： Patel, A Kjos, K Sasso, F Robinson, S Anant Patel:is senior project engineer for the Standard Missile LEAP Progrma (desgnated SM-X) in the Standard Missile/Vertical Launch System Program Office (PMS 422) of the Navy's Program Executive office for Theater Air Defense (PEO TAD). He is responsbile for the integration and test of the SM-X missile including the third stage rocket motor (TSRM) and the kinetic warhead (KW) assemblies. He received his bachelor of science in electrical engineering from the University of Pittsburgh in 1985 Prior to joining PMS 422 he was the project engineer for the shipboard targeting system used during the Terrier LEAP technology demonstration program. he was also tht project manager for the installation and integration of the new threat upgrade (NTU) and cooperative engagement capabilities (CEC) aboard USS Kidd (DDG 993) the first ship to receive CEC during its development test phase. Mr. Patel's other assignments as NTU development lead engineer uncluded providing development and technical direction for modifications to the NTU engagement system for Standard Missile II and III/IIIA compability. kathrin Kjos:is the program development team leader for Hughes Missile Systems Company. She worked on the initial flight demonstraction phase of the program integrating the kill vehicle and advanced solid axial stage into the SM2 Block III ER missile and served as co-chair of the System Safety Working Group. She has thirteen years of experience in system engineering. Previous experience includes missile systems engineering for the Advanced Air-to-Air Missile (AAAM) as well as for laser and radar surveillance systems. She has a bachelor of science degree in chemical engineering from the Illinois Institute of Technology a master of science degree in system engineering from the University of Southern California and is currently a doctoral candidate in systems architecting at the University of Southern California. Felix Sasso is a member of technical staff 11 at Hughes Missile System Company. He has three years of experience in op

While most of the theater ballistic missiles (TBM) in threat countries' inventories are of the shorter range SCUD varieties, mid- to long-range versions are currently in development in a number of third world countries. Threat potential exists in the following three battle spaces: endo-atmosphere (0-30 km), high endo-atmosphere (30-70 km) and exo-atmosphere (greater than 70 km). The inherent short range and low speed of endo-atmospheric threats match well with capabilities of SM-2 Block IVA, which equips the Navy with an area defense capability The exo-atmospheric TBMs are longer range and can threaten more targets which may be widely dispersed. Their higher velocities reduce response times dramatically Therefore, exo-atmospheric TBMs create the need for Standard Missile-3 (SM-3), which provides the Navy with theater wide defense capability. Defining its area and theater wide systems as clearly endo-atmospheric and exo-atmospheric systems allows the Navy to use derivatives of the Standard Missile Block IV to take full advantage of the conditions associated with each of these operating zones. Use of an existing missile and ship system baseline also allows use of the existing interface structure to minimize cost. To counter the endo-atmospheric TBMs, the SM-2 BLK TVA upgrades include an advanced imaging infrared (IIR) seeker, an improved fast-reaction auto pilot and a forward looking RE all in the same volume as the existing missile. The highly responsive SM-2 Block IVA missile, complemented with Aegis weapons systems modifications, provides capability against enemy aircraft and cruise missiles, as well as TBMs. Standard Missile-3 (SM-3) replaces the SM-2 Block TV warhead, radar and guidance section with a boosted third stage and an advanced kinetic warhead (KW). Operation in the exo-atmospheric region permits a KW design with autonomous guidance control and divert thrusters for high maneuverability and has the capability of achieving very high interceptor velocities.

关键词： Missiles

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The effect of ozone exposure to extend the shelf life of carrots (Daucus carrota L.) against vitamin C levels and hardness

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AIP Conference Proceedings 2024年第1期3047卷

作者： Deny Arifianto Yunus Susilo Tri Wahyuni Miratul Khasanah Riries Rulaningtyas Suryani Dyah Astuti Doctoral Program Faculty of Science and Technology Universitas Airlangga Surabaya 60115 Indonesia Faculty of Engineering Universitas Dr Soetomo Surabaya 60118 Indonesia Department of Physics Faculty of Science and Technology Universitas Airlangga Surabaya 60115 Indonesia Department of Chemistry Faculty of Science and Technology Universitas Airlangga Surabaya 60115 Indonesia

Agricultural production is influenced by the handling of post-harvest agricultural products. The handling should prevent factors that can lead to a decrease in the quality of agricultural products. Ozone exposure is done to find out the most effective shelf life of carrots. The sample consisted of 3 groups, namely the control group without ozone treatment (T0), the ozone exposure group through air/spray (T1), the ozone exposure group through immersion in water/soak (T2) and the spray and soak combination group (T3). Ozone exposure time is given for 10 minutes in a closed container, further observed organoleptic changes, pH, hardness and vitamin C levels contained in carrots after 1-5 days of storage. The research results showed that ozone treatment with various methods resulted in significant differences (p=0) in mass loss, pH and hardness of carrots. Ozone treatment with spray and soak on day 1-5 resulted in the stability of mass loss, pH and hardness when compared to other treatment methods. The effect of ozone exposure on carrots by spray and soak can extend shelf life with the smallest percentage decrease based on the results of organoleptic tests, mass loss (58%), hardness (35%) and pH (22%) on the 5th day. So ozone treatment is able to extend the shelf life of carrots based on their organoleptic and physical parameters.

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Techno-economic analysis of a central receiver power plant with different levels of storage capacity and hybridization

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AIP Conference Proceedings 2018年第1期2033卷

作者： Daniel L. C. Costa José H. M. Neto 1Energy Engineering Master’s Degree Mechanical Engineer. Centro Federal de Educação Tecnológica de Minas Gerais Department of Mechanical Engineering – Master Program of Energy Engineering. Address: Av. Amazonas 7675 Belo Horizonte-MG Brazil 30510-000. Phone: +55-31-999986464 2Civil Engineering Doctoral Degree Mechanical Engineering Master’s Degree Mechanical Engineer. Centro Federal de Educação Tecnológica de Minas Gerais Department of Mechanical Engineering – Master Program of Energy Engineering. Address: Av. Amazonas 7675 Belo Horizonte-MG Brazil 30510-000

The energy storage and fossil-backup (fossil-hybridization) systems of a concentrating solar power plant (CSP) provide a continuous production of energy all over the year and satisfy the grid demand even when the sun is not shining. One could ask about the behavior of the energy production, or the levelized energy cost, as a function of the energy storage and of the fossil-hybridization in such plants. This paper tries to answer this question. For this task, there have been performed numerous simulations on a central receiver plant with a fixed nominal power, varying the storage capacity and the level of hybridization. The results showed that these variables impact differently. For the thermal storage, from capacities ranging from 0h to 24h, there is a specific intermediary capacity, 15h, in which the levelized energy cost is minimum. But for the fossil-hybridization, this energy cost always decreases with the increment of the hybrid level. The results also showed that, if a given energy production is supported by a certain level of hybridization, its energy cost would be less than that supported by a storage system. This is due to the relatively high investment costs related to the storage system, and the relatively low cost of fuel.

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Structure and functional group of CuO nanoparticle-reinforced osmosis membrane based on bacterial cellulose from Sargassum sp. extract

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AIP Conference Proceedings 2024年第1期3110卷

作者： Uun Yanuhar Heru Suryanto Muhamad Amin Jibril Maulana Nico Rahman Caesar Department of Aquatic Resources Management Faculty of Fisheries and Marine Science Brawijaya University Jl. Veteran Malang Indonesia Department of Mechanical Engineering Faculty of Engineering Universitas Negeri Malang Malang Indonesia Department of Aquaculture Faculty of Fisheries and Marine Universitas Airlangga Surabaya Indonesia Doctoral Program of Environmental Science Postgraduate School Brawijaya University Malang Indonesia

Osmosis membranes have been widely used in industries for water purification, wastewater treatment, and biomedical applications. However, the current membranes still have some drawbacks, such as water flow resistance and vulnerability to fouling. Therefore, the development of more efficient and durable osmosis membranes is highly necessary. In this research, the researchers used bacterial nanocellulose extracted from Sargassum sp. as a material for producing more efficient osmosis membranes. The methods used in this study were experiments with two treatments: (1) control, and (2) Bacterial cellulose with a concentration of 1.0 wt% CuO nanoparticles. The nanocellulose was produced using a high-pressure homogenizer, followed by the synthesis of acetate nanocellulose and characterization of the nanocomposite membrane functionalized with CuO nanoparticles. The membranes were characterized using FTIR and XRD analysis. Bacterial cellulose from seaweed was successfully formed with a thickness of 1-3 cm. The results of the characterization analysis showed that the formed bacterial cellulose belonged to Cellulose type I with a crystalline degree ranging from 88.7% to 85.7%. The dry osmosis membranes were analyzed based on their functional groups using FTIR. The analysis revealed changes in transmittance at the peaks of O-H at wavenumbers 3122-3414 and Cu-O at wavenumber 424-673, resulting from the addition of CuO nanoparticles and causing changes in the value of the O-H bond in bacterial cellulose.

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