Miracle-dz/UniFAR-FTUs huggingface dataset:
Copy number variation in small nucleolar RNAs regulates 1 personality behavior

20 Animals show behavioral traits that can collectively be called personality. We focus here on the role 21 of the Prader-Willi Syndrom gene region in regulating personality behavior. It includes two clusters of 22 tandem repeats coding for small nucleolar RNAs, SNORD115 and SNORD116. SNORD115 is 23 known to regulate splicing of the serotonin receptor Ht2cr and SNORD116 is predicted to interact 24 with the transcript of the chromatin regulator Ankrd11 . We show that both snoRNA clusters display 25 major copy number variation within and between populations, as well as in an inbred mouse strain 26 and that this affects the expression of their specific target genes. Using a set of behavioral scores 27 related to personality in populations of two species of wild mice, guinea pigs and humans, we find a 28 strong correlation between the snoRNA copy number and these scores. Our results suggest that the 29 SNORD clusters are major regulators of personality and correlated traits. 30
An Isolated Multi-Port Converter with Hybrid Power Flow Control

An isolated multi-port converter (IMPC) with hybrid power flow control is proposed in this paper. Three input/output ports are included in the IMPC. The first input of the IMPC can be connected to PV array or other dc sources. The second input will be connected to the battery, whereas the second input can be acted as the load according to different operating scenarios. The output will be connected to the load. Besides, the hybrid power flow control will be developed and realized by the digital signal processor (DSP). With this proposed circuit and control strategy, the energy between the PV array, the battery and the load can effectively be regulated. If the demanded load power is greater than the supplied power from the PV array, the inadequate power can be provided by the battery. On the contrary, if the demanded load power is lower than the PV power, the battery will be charged. Hardware experiments are presented to verify the feasibility of the proposed IMPC. Finally, a 150W prototype circuit is designed and implemented. The voltage/current of the first and the second input ports are set as 60V/2.5A and 100V/1.5A, respectively. The output voltage and current are set as 100V/1.5A.
Magnetic properties of dust core without binder

Iron dust core is the iron core which is made of iron powder coated with an insulating film and molded under pressure. Iron dust core was conventionally formed using binder to bind the particles together. However, our laboratory has succeeded in forming an iron dust core without binder by using SiO2 as insulating film. This reduces the proportion of nonmagnetic material and allows to make higher-density iron cores. In this study, influences of particle size and thickness of insulating film for magnetic properties of iron dust core without binder was investigated.
OCR Optimization Setting on Industry System PT. Petrokimia Gresik Considering Inrush Current Using Adaptive Modified Firefly Algorithm

In the industry, frequent load changes make the potential for short-circuit disturbances considerably. Therefore, an effective protection coordination system is required to secure the industrial equipment. A protective system must properly and securely reduce disturbances to avoid unexpected effects such as more severe equipment failures, power outages, and human safety risks. Protection coordination that integrates with another is necessary to create a more reliable protection system. The best protection has a structure that works quickly to secure disturbances so that they do not spread to other networks and has excellent coordination for identifying the types of disturbances. The leading benchmark for setting protection relays is TDS. The TDS (Time Dial Setting) parameter must be filled in while coordinating protection, especially in the overcurrent relay. TDS controls how long the relay operates for resolving a fault. The TDS value is typically calculated and analyzed to get the minimum TDS value. Despite this, considering the inrush current transformer. However, PT Petrokimia Gresik electricity system demonstrates the trial-and-error method of changing the curve until the CTI is used to obtain the correct TDS value in collaboration with other relays. An algorithm can be used to simplify and provide accurate TDS results. This final project will discuss calculating the TDS inverse time overcurrent relay with the Adaptive Modified Firefly Algorithm (AMFA) method on the electricity system at PT Petrokimia Gresik to get the minimum TDS value. This study used 2 typical with a radial system, and its network contains 3 transformers. If a disturbance occurs, this authorizes an inrush current to flow. Consequently, it is evaluated. The results of the study obtained the relay TDS value using the AMFA algorithm to get the optimum value below the specified maximum limit, considering inrush current.
A Control-Oriented Voltage Tracking Design for Grid-Forming Based Modular Multilevel Converter

Modular multilevel converters (MMCs) based on grid-forming control as a converter-driven interface for renewable energy sources are the development trend of the future electronics-dominated power grids. MMC offers outstanding voltage quality without an AC filter, which is very distinct from the AC topology of conventional two-level converters (TLC). However, most literature that studies the grid-forming MMC directly follows the voltage tracking control (VTC) principle of TLC and does not involve the voltage controller specifically for the MMC topology. In this paper, the design of the voltage controller is step-by-step deduced based on the topological properties of MMC. According to the analysis findings, the proportional link of the voltage loop can result in high-frequency oscillation and the proposed VTC with a sole integral link cooperating with inner current-loop control presents excellent dynamic performance. Finally, the proposed VTC is realized robustly in the laboratory prototype.
High reliable transformer-less deadtime less Inverter for Grid-connected Applications

This paper presents a transformer-less inverter topology that brings out the high-performance for grid connected inverters. The main advantages of this inverter eliminate the dead-time requirement, and allows both top and bottom switch from being on at same time, and thus shorting the DC bus supply to ground. This avoids the freewheeling diodes connected across the switches for loads other than purely resistive. Low output voltage distortion and low fundamental and common voltages losses result in high efficiency and high output power density. The input dc source and the output ac voltage share the same ground in proposed inverter, which effectively eliminates the leakage current caused by the DC source (PV panel, battery bank etc.). Analysis and simulation results are presented to demonstrate the effectiveness of the proposed inverter. Compared to the prior literature mentioned in this paper, 75– 86% reduction of semiconductor components is achieved with proposed inverter topology.
A Low-Loss and High Phase Matching Balun Chip Based on Integrated Passive Technology for S-band RF System

With the rapid development of 5G and mobile wireless communication systems, the market demand for high-performance RF front-end devices is increasing dramatically. As a balanced-unbalanced signal converter, the balun has attracted the attention of many researchers because of its widely-used advantages in various circuit systems. In this paper, we propose a miniaturized RF balun chip based on integrated passive technology, which can transmit signals in two different transmission environments with less loss. The designed balun chip consists of a T-type lowpass filter, a $\pi-$type highpass filter, transmission line, and coplanar waveguide feedline. The cut-off frequency of the T-type lowpass filter is larger than that of the $\pi-$type highpass filter, so the input signal can pass through the T-type lowpass filter and the $\pi-$type highpass filter to complete the transmission of the balanced signal to two unbalanced signals with a phase difference of 180° in microwave frequency band. The combination of T-type and $\pi$-type filters can reduce the phase mismatch and misalignment, reduce the layout area, which are conducive to miniaturized design and improve the transmission performance. Simulation results indicate the insertion loss is low to -35.56dB in 2.4 GHz, and the die is only 940 $\mu \mathrm{m}\times 907\mu \mathrm{m}$. The RF balun chip based on the integrated passive process proposed in this paper can be applied to the S-band RF system and effectively integrated into active or passive circuit systems.
Data-Driven Electrolyzer Modeling: Adaptive Model Considering Operating Conditions using K-means Clustering

This paper proposes a data-driven method for modeling electrolyzers at the cell level that takes into account operating conditions such as pressure, temperature, and current. To achieve this, operating conditions were categorized into optimal clusters using the K-means clustering algorithm. A deep neural network (DNN) was used to map the complex nonlinear input-output relationships arising from the electrolyzer's thermodynamic and electrochemical reactions. The study used a dataset of experimental data obtained from various specifications and operating conditions installed in different regions, with the goal of creating an adaptive electrolyzer model. The results showed that the proposed model outperformed physical-based and data-driven models that did not consider operating conditions in all evaluation indices. Specifically, the modeling error was MSE 0.15V/cell, RMSE 12.15mV/cell, MAE 8.14mV, and RE 0.49%. Therefore, the proposed model is suitable for energy grid research such as digital twins in future studies.
Alignment of Wireless Power Transfer System for Implantable Medical Device using Permanent Magnet

Recently, research on applying wireless power transfer (WPT) technology has been actively conducted to improve the stability and convenience of implantable medical devices (IMD) inserted into the human body for direct treatment of diseases. However, in the case of the WPT system for IMD, misalignment is likely to occur due to the miniaturization of the receiving coil and difficulty in locating the receiving coil. In this paper, we propose a WPT system alignment method for implantable medical devices using permanent magnets (PM). The effect of permanent magnets on the WPT system is analyzed in terms of system efficiency and electromagnetic field (EMF), and the PM is designed based on this. The proposed method is analyzed and verified through simulation.
Thermal Impedance Computation of a SiC Power Module for Traction Inverter in Electric Vehicle Applications

In this work, a method to thermally characterize a power semiconductor module based on silicon carbide for traction inverters is presented. In general, this is important in order to determine the real thermal behavior of the system and, consequently, to forecast the application reliability performances. Thermal impedance is measured by a dedicated bench, capable to heat power module by applying a constant current, yet ensuring a controlled liquid cooling environment. The obtained experimental curve is then translated into a system made by several RC ports, obtained employing convolution’s algorithms. Solving the related differential equations, temperature profile can be obtained as function of time. Considering the actual application power loss, the related temperature profile can be calculated and collected in a discrete number of different load cases characterized by a duration and a thermal swing.
Research on Control Method of Photovoltaic Inverter Based on PIR

With the rapid development of green energy, inverter technology has become a key technology for renewable energy. To solve the problem of low output voltage of photovoltaic panel, a two-stage topology is proposed. The front stage adopts high-frequency isolated phase-shifted full-bridge structure, which can realize soft-switching technology. The last stage is single-phase inverter structure. In order to achieve high efficiency, high quality output and improve the dynamic and static performance of the inverter system, based on the traditional double closed-loop proportional integral (PI) control, the current control loop proportional control and voltage control loop proportional integral resonance (PIR) control method are improved. The parameters are derived by small signal model, and the system is simulated and verified by experiments. The experimental results show that the system has good dynamic and static performance, and can effectively suppress resonance.
Research on Underwater Wireless Power and Information Synchronous Transmission Technology

With the continuous development of underwater unmanned vehicles, they have taken on important underwater tasks, and the requirements for their power and information transmission capabilities have been increasing. The underwater wireless power and information synchronous transmission technology can not only deliver energy, but also transmit information. This paper analyzes and designs a wireless power and information synchronous transmission system. Energy and information are transmitted through different coupling coils, and the coupling coils are analyzed through simulation. Furthermore, the inverter circuit is designed. The field programmable gate array (FPGA) is used to generate square wave signals to drive the inverter to achieve DC to AC conversion and generate modulated signals for information transmission. The correctness of the program is verified. Based on these, the design of the whole underwater wireless power and information synchronous transmission system can be further developed.
Function-Correcting Codes

In this paper we study function-correcting codes, a new class of codes designed to protect the function evaluation of a message against errors. We show that FCCs are equivalent to irregular-distance codes, i.e., codes that obey some given distance requirement between each pair of codewords. Using these connections, we study irregular-distance codes and derive general upper and lower bounds on their optimal redundancy. Since these bounds heavily depend on the specific function, we provide simplified, suboptimal bounds that are easier to evaluate. We further employ our general results to specific functions of interest and compare our results to standard error-correcting codes, which protect the whole message.
Thermal Model for Single-Phase Dual Active Bridge Converter for Future Smart Transformer in Indonesia

The future smart transformer in Indonesia is designed to be efficient by using the dual-active bridge (DAB) converter for its DC-DC converter. A DAB converter has capability of zero-voltage switching (ZVS), which has lower losses than other DC-DC converter design. However, thermal model becomes the key process to calculate the losses of a DAB converter for future smart transformer in Indonesia. This research uses Foster thermal model and PLECS software to estimate and simulate the thermal model to find the thermal losses. Two types of switching devices, IGBT and SiC MOSFET, are used in the DAB converter and then the thermal losses are compared. The simulation model is used to validate that the analytical model of a DAB converter can be used to calculate the total losses of a DAB converter. The results show that the design of future smart transformer in Indonesia with a DAB converter using SiC MOSFET has lower losses than using IGBT as switching in the same switching frequency.
Gravitational Dynamical Systems

Dynamical systems have a centuries-long history with roots going back to the mathematical development for astronomy. In the modern formalism, the present thesis investigates dynamical properties of gravitation at different astrophysical or cosmological scales.In potential theory, isochrony often refers to harmonic oscillations of pendulums. In 1959, the mathematician and astronomer Michel Henon introduced an extended definition of isochrony to characterize orbital oscillations of stars around the center of the system to which they belong. In that case, the period of oscillations can depend on the energy of the star. Today, Michel Henon’s isochrone potential is mainly used for its integrable property in numerical simulations, but is not widely known. In this thesis, we revisit his geometrical characterization of isochrony and complete the family of isochrone potentials in physics. The classification of this family under different mathematical group actions highlights a particular relation between the isochrones. The actual Keplerian nature of isochrones is pointed out and stands at the heart of the new isochronerelativity, which are presented together.The consequences of this relativity in celestial mechanics — a generalization of Kepler’sThird law, Bohlin or Levi-Civita transformation, Bertrand’s theorem — are applied to analyze the result of a gravitational collapse. By considering dynamical orbital properties, an isochrone analysis is developed to possibly characterize a quasi-stationary state of isolated self-gravitating systems, such as dynamically young stellar clusters or galaxies.At a cosmological scale, the dynamics of the universe depends on its energy content. Its evolution can be expressed as an ecological dynamical system, namely a conservative generalized Lotka-Volterra model. In this framework of a spatially homogeneous and isotropic spacetime, named Jungle Universe, the dynamical impact of a non-gravitational interaction between the energy components is analyzed. As a result, effective dynamical behaviors could account for an accelerated expansion of the universe without dark energy.
A Novel Cascaded Multilevel Inverter Topology and Its Control Strategy for Medium-Voltage Direct-Mounted Photovoltaic Grid-Connected System

With the increase of the inverter voltage and power, the cascaded multilevel inverter (CMI) becomes an emerging solution owing to its modularity. The output voltage of CMI could be a reasonably high level to mount the medium-voltage grid without transformers directly. Many structures of CMI have been studied in recent years but can not achieve power balance. To realize multi-channel maximum power point tracking (MPPT) and balance the power among H-bridges (HBs) in the three phases, a novel three-stage CMI topology and its control strategy are proposed in this paper. Experiment results proved the effectiveness of the proposed topology and its control strategy.
Optimal Design of the Planar Transformer Based on Its Multi-physics Field Coupling Characteristics

Integration, high reliability and high power density have become the research hotspot of modern high-frequency power converter equipment. More and more research on planar transformers in order to improve the power density of electronic devices. Taking planar transformer as the research object, combined with its technical indicators. This paper is applied to the half-bridge LLC resonant converter system, based on multi-physics simulation and experiments, the design and optimization of planar transformers are realized. The design and optimization of high-frequency PCB planar transformers are taken as the research goal, a high-frequency equivalent model is established, and it is calculated in electromagnetic simulation software. The optimization is carried out from the two aspects of loss characteristics and structural parameters, which has certain reference significance for the design of PCB type planar transformers in similar high-frequency, low-voltage and high-current applications.
A Comparison of Differential Kinematics and Machine Learning Approaches in Motion Planning for Intra-operative Cardiac Ultrasound Robots

Intra-operative cardiac ultrasound robots are emerging as a new tool to assist in cardiac interventional procedures to improve the efficiency of the procedure and reduce the operator’s experience. These robots are often based on a continuum mechanism to achieve end position changes. The central issue for the control of these robots is motion planning. With its flexibility, machine learning-based approaches may provide new ideas for this type of problem compared to traditional differential kinematics, although related research is limited. In this paper, we present specific approaches to achieve the corresponding tasks by differential kinematics, supervised learning and reinforcement learning for specific motion planning problems, and thus analyze the feasibility of different approaches and compare their performance. The results show that differential kinematics is able to perform the best considering all tasks, while both supervised learning and reinforcement learning methods can also accomplish the intended task within a certain error range and with different characteristics. To conclude, the work lays the foundation for further flexibility in solving more complex tasks in motion planning using the combination of conventional kinematics and machine learning-based methods.
The Use of Invasive and Non-Invasive Electrodes in Novel Technology of Upper Limb Prostheses: A Current Review

An amputation is the mutilation of a body part, which can be a limb or part of a limb. For the World Health Organization (WHO), amputees represent approximately 0.25% and 1.25% of the world’s population. Electrodes are used to capture biological signals or biosignals from specific parts of a user’s body for optimal development of devices such as upper limb prostheses. In this review, various electrodes used in upper limb prostheses were identified in categories that are indispensable for their development, such as commercial name or electrode references, the type of electrode (invasive or noninvasive), the number of electrodes used, the control biosignals that are captured by the electrodes and that activate the operation of the prostheses, the location of the electrodes, the advantages and disadvantages, and the level of amputation of the limb. According to the research, the two advantages most mentioned by the authors are that the electrodes are cheap and accurate, while the disadvantages are that they are noisy and imprecise. These depend on the application or objective that the author wanted the electrode to have for the design of bionic hand for people who have suffered an upper limb amputation.
Development of a CAD-based automated worker guidance system

Worker guidance systems are a central element in the ongoing digitalization of factories in the context of Industry 4.0. Their value has already been demonstrated in multiple studies. Typically, worker guidance systems are implemented as standalone systems without interconnections to the enterprise IT architecture and shopfloor environment. As a result, each product variant requires a high maintenance effort compromising the benefits of worker guidance systems especially in high variance production scenarios. This publication proposes a concept to completely integrate such an assistance system into an existing company IT infrastructure. The main goal is to generate the data for worker guidance completely automatically. Interfaces to the ERP and PLM systems make the data sources available. CAD data for augmentation in combination with order details are the backbone for assembly assistance. However, the data has to be prepared, converted, synchronized and merged in order to be processed by the worker guidance system. Integrating microservices at different levels of the automation pyramid make it possible to completely eliminate maintenance efforts that are required in state-of-the-art systems without negatively affecting the quality of worker guidance. In future developments, CAD data should be used for an automatic quality check of the assembly status to upgrade the worker guidance system to a tutorial assistance system.