Zero Point Research Articles

Design of HTS linear phase bandpass filter based on the inline topology

Abstract Inline topology filters have the advantages of a simple structure and fewer coupling coefficients. Based on the inline topology, this paper constructs a phase compensation topology of the filter, which can independently and controllably introduce two types of transmission zeros (TZs), and is convenient to realize the Chebyshev-like function response and compensate group delay. The finite frequency transmission zero is directly introduced through the source and load (S/L), and the real zero point is introduced and adjusted through the cross-coupling unit of the main path in this inline phase compensation topology. The two types of TZs can be introduced and regulated independently, so the side-band suppression and group delay compensation can be freely adjusted. A High-temperature superconducting (HTS) filter with inline is designed and processed with a typical structure based on application requirements. The filter introduces two pairs of symmetrical real TZs to improve sideband rejection and a pair of real TZs to control group delays to realize the linear phase. In addition, it has a small size and straightforward construction, and the results of the full-wave analysis method and the theoretical analysis approach match well with the measured results of the frequency response characteristics.

Fast and robust analog in-memory deep neural network training

Analog in-memory computing is a promising future technology for efficiently accelerating deep learning networks. While using in-memory computing to accelerate the inference phase has been studied extensively, accelerating the training phase has received less attention, despite its arguably much larger compute demand to accelerate. While some analog in-memory training algorithms have been suggested, they either invoke significant amount of auxiliary digital compute—accumulating the gradient in digital floating point precision, limiting the potential speed-up—or suffer from the need for near perfectly programming reference conductance values to establish an algorithmic zero point. Here, we propose two improved algorithms for in-memory training, that retain the same fast runtime complexity while resolving the requirement of a precise zero point. We further investigate the limits of the algorithms in terms of conductance noise, symmetry, retention, and endurance which narrow down possible device material choices adequate for fast and robust in-memory deep neural network training.

Migrant necropolitics in No Man’s Land camps

Abstract Through genealogical explorations of the understudied No Man’s Land camps at Rukban and Zero Point, this paper aims to contribute a decolonial, South-centric perspective to critical refugee politics literature. The two No Man’s Land camps are conceptualized here as necropolitical spaces of migrant abandonment and containment, where States effectively determine ‘who may live and who must die’ through their violent expulsion of unwanted populations, securitized border policies and restrictions on life-saving aid. Despite their immobilization, the paper highlights how the displaced migrants formed self-government and engaged in claim-making for aid, rights, and homeland political change, thus transforming the death worlds of the No Man’s Land camps into spaces of vibrant political contention. This necropolitical resistance comes with the risk of death or redisplacement, but it provides tantalizing clues of the possibilities of living, even if only momentarily, beyond the law and the State.

Using Göbeklitepe, the Zero Point of History, in Cultural Heritage Education

Cultural heritage education plays a crucial role in sparking curiosity about historical cultural elements, preserving and evolving cultural traditions, strengthening national identity, and cultivating engaged citizens. In light of this, this study aims to determine the educational outcomes of incorporating Göbeklitepe, a historical site, into the cultural heritage education component of the fifth grade Social Studies course. In this research, the most common type of qualitative research, the basic interpretive research approach, was preferred. The study group, comprising 22 fifth-grade students from a middle school, was selected through the use of criterion sampling, case sampling, and purposeful sampling. The data collection tools employed in the study included clay studies, talking object worksheets, student diaries, a Göbeklitepe newspaper, and a self-assessment form. The data were subjected to content analysis and descriptive statistical analysis. The findings of the study indicated that engagement in cultural heritage activities enhanced students' comprehension of the historical development of Göbeklitepe. They acquired knowledge about the historical trajectory of the site and were able to contextualize this process within the broader historical context of Şanlıurfa. In accordance with the nature of history, it was determined that students realized the impossibility of acquiring exhaustive knowledge about Göbeklitepe. In their diaries, students proposed the implementation of further research, excavations, and the utilization of knowledgeable individuals to elucidate the enigma of Göbeklitepe's history. However, it was determined that students encountered challenges in applying the skills of perceiving change and continuity.

Three Dimensions of<b></b> Fan Reconnection

Many celestial occurrences, including solar flares and the solar corona and modifications to the magnetosphere of Earth, are thought to be caused by the reconnection process. This process occurs in highly conductive plasmas. One of the candidate places for this process is the three-dimensional zero points, in this process, stored energy is transformed into new types of energy Aims. Magnetic reconnection at a single null point: influence of magnetic field symmetry. Methods. We discussed a stable solution to several of the resistivity MHD formulations. Results. The field's asymmetry (k) may impact the propagation area dimensions and rate of reconnection in a variety of ways, depending on the parameters we choose.

On Dancer’s conjecture for stable solutions with sign-changing nonlinearity

We establish a Liouville type result for stable solutions for a wide class of second order semilinear elliptic equations in R n \mathbb {R}^{n} with sign-changing nonlinearity f f . Under the hypothesis that the equation does not have any nonconstant one dimensional stable solution, and a further nondegeneracy condition of f f at its zero points, we show that in any dimension, stable solutions of the equation must be constant. This partially answers a question raised by Dancer.

Just the facts: integrating human and environmental factors in trauma resuscitation with Zero Point Survey.

Just the facts: integrating human and environmental factors in trauma resuscitation with Zero Point Survey.

Analysis of Characters and Characteristics in The Novel "Perempuan di Titik Nol" By Nawal El Saadawi Using A Feminism Approach

This article analyzes the characters and characterization in the novel "Women at Zero Point" by Nawal El Saadawi using a feminist approach. This novel depicts women's struggle in facing oppression, violence and gender injustice in a patriarchal society. A feminist approach is used to analyze how the female characters in this novel face these problems and struggle to find freedom. This analysis uses a literature review method by referring to the novel "Perempuan di Titik Zero" and relevant feminist literature studies. Focus is given to the main character, Firdaus, as well as other female characters in this novel. The results of the analysis show that the female characters in this novel face oppression and violence carried out by the patriarchal system. Firdaus, as the main character, faces various forms of sexual exploitation, domestic violence, and objectification by the surrounding community. However, this novel also highlights women's solidarity as a source of strength and support in their struggle against gender injustice. A feminist approach helps in seeing how the author criticizes patriarchal norms that limit women. Firdaus and other female characters challenge narrow social expectations and attempt to shape their identities outside these constraints. In conclusion, This analysis confirms that the novel "Women at Point Zero" is a reflection of women's struggle to seek freedom and overcome gender injustice in a patriarchal society. Women's solidarity and criticism of patriarchal norms are important themes in this novel, inviting readers to consider the role and influence of patriarchy in women's lives.

Multilayered Ru/TiO[formula omitted] hyperbolic material for nonlinear optics

In this work we present the design, fabrication and study of the optical properties of hyperbolic materials based on multilayered metal–dielectric Ru/TiO2 structures. The samples were fabricated using the Atomic Layer Deposition technique, and their structure was designed to have an Epsilon Near Zero point near 800 nm to match the laser wavelength employed to study their response. The linear optical properties were studied using spectrophotometry and spectral ellipsometry. The nonlinear response was studied as a function of incident irradiance using the z-scan technique with fs pulses as a function of wavelength throughout the visible, allowing the determination of the refractive and absorptive contributions to the nonlinear response. Given that a high pulse repetition rate was employed, cumulative pulse to pulse thermal effects can be present, because of this, a modification of the z-scan technique allowed the resolution of the electronic and thermal contributions to the response.

A Critical Review on Superconducting Semi-Cryogenic Fuels for Advanced Space Propulsion and Deep Space Missions

The exploration of deep space necessitates revolutionary propulsion technologies to overcome the vast distances involved. This review critically evaluates the potential of superconducting semi-cryogenic fuels as a game-changing approach for spacecraft propulsion. Superconductors, exhibiting zero electrical resistance at low temperatures, offer significant advantages for efficient electromagnetic thrust generation. However, achieving the ultra-low temperatures typically required for superconductivity presents logistical challenges for spacecraft. This review explores the use of semi-cryogenic fuels like liquid hydrogen and methane, enabling operation at more manageable temperatures while leveraging the benefits of superconductivity. The review delves into the challenges of boil-off loss and analyzes various mitigation techniques like multilayer insulation, 3M glass bubbles, active cooling systems, and Zero Point Boil Off (ZBO). Furthermore, it highlights the potential performance gains of superconducting semi-cryogenic propulsion systems, including significant weight reduction and improved efficiency. Critical considerations such as radiation exposure and the need for further research in high-temperature superconductors and computational modeling are discussed. Overall, this review underscores the promising path that superconducting semi-cryogenic fuels offer for advancing deep space exploration.

On Variance and Average Moduli of Zeros and Critical Points of Polynomials

This paper investigates various aspects of the distribution of roots and critical points of a complex polynomial, including their variance and the relationships between their moduli using an inequality due to de Bruijn. Making use of two other inequalities-again due to de Bruijn-we derive two probabilistic results concerning upper bounds for the average moduli of the imaginary parts of zeros and those of critical points, assuming uniform distribution of the zeros over a unit disc and employing the Markov inequality. The paper also provides an explicit formula for the variance of the roots of a complex polynomial for the case when all the zeros are real. In addition, for polynomials with uniform distribution of roots over the unit disc, the expected variance of the zeros is computed. Furthermore, a bound on the variance of the critical points in terms of the variance of the zeros of a general polynomial is derived, whereby it is established that the variance of the critical points of a polynomial cannot exceed the variance of its roots. Finally, we conjecture a relation between the real parts of the zeros and the critical points of a polynomial.

OPTIMASI PENDISTRIBUSIAN BERAS DENGAN PENERAPAN METODE IMPROVED ZERO POINT METHOD PADA PERUM BULOG KANTOR CABANG MEDAN

This study discusses the Implementation of the Improved Zero Point Method in optimizing the distribution of rice at Perum Bulog Medan Branch Office with the goal to be achieved, namely, optimizing or minimizing the cost of distributing rice. In this study, problem solving was solved using the North West Corner Method as the initial solution, and the Improved Zero Point Method as the optimal solution. The results of this study obtained an initial solution, namely, Rp. 11,619,850, then we calculate using the optimal solution we get a reduction in distribution costs of Rp. 8,089,900.

Cyclic projection methods for solving the split common zero point problem in Banach spaces

Cyclic projection methods for solving the split common zero point problem in Banach spaces

Noise reduction method for ship radiated noise signal based on modified uniform phase empirical mode decomposition

Noise reduction of underwater acoustic signal is of great significance in improving signal recognition capabilities of sonar system. In this paper, as a new decomposition algorithm, modified uniform phase empirical mode decomposition (MUPEMD) is proposed to improve the calculation efficiency and alleviate mode aliasing problem. After being decomposed by MUPEMD, mode components can be classified adaptively through critical entropy value. Dynamic zero point interval filtering method based on genetic algorithm (GA-DZPIF) is proposed to filter single mode component. Structure similarity of phase diagram is established as a new evaluation index to avoid the subjective difference which can enhance the persuasiveness of experimental result. Finally, a new noise reduction method for ship radiated noise signal based on MUPEMD, GA-DZPIF and entropy cross curve is proposed. Good denoising performance has been achieved for measured ship radiated noise signal, and it has a wide range of practical application.

Random Dirichlet series with [formula omitted]-stable coefficients

Let P be a set of non-negative real numbers, we consider a class of random Dirichlet series D(s)=∑p∈Pξpps with symmetric α-stable (0<α⩽2) coefficients. Real zero point problem of D is studied firstly. We prove that, if Z(τz)<∞, then with a positive probability there are no real zero points in the interval [τz/α,∞), while if Z(τz)=∞, for any ɛ>0, almost surely D has infinite number of real zeros in the interval s=(τz/α,τz/α+ɛ). Here, Z(s)=∑p∈P1ps and τz is its abscissa of convergence (see Section 1). In the proof, we find that lim sups→1/α+D(s)=∞ almost surely under the condition Z(τz)=∞. Finally, to get more asymptotic information for D(s), under P=N, some asymptotic properties for D(s) compared with Z(αs) are explored as s→1/α+.

Inertia I: The global MSp-SUSY induced uniform motion

In this communication our main emphasis is on the review of the foundations of standard Lorentz code (SLC) of a particle motion. To this aim, we develop the theory of global, so-called, `double space´- or master space (MSp)-supersymmetry, subject to certain rules, wherein the superspace is a 14D-extension of a direct sum of background spaces M4⊕ MSp by the inclusion of additional 8D fermionic coordinates. The latter is induced by the spinors θ and ¯θ referred to MSp. While all the particles are living on M4, their superpartners can be viewed as living on MSp. This is a main ground for introducing MSp, which is unmanifested individual companion to the particle of interest. Supersymmetry transformation is defined as a translation in superspace, specified by the group element with corresponding anticommuting parameters. The multiplication of two successive transformations induce the motion. As a corollary, we derive SLC in a new perspective of global double MSp-SUSY transformations in terms of Lorentz spinors (θ, ¯θ). This calls for a complete reconsideration of our ideas of Lorentz motion code, to be now referred to as the individual code of a particle, defined as its intrinsic property. In MSp-SUSY theory, obviously as in standard unbroken SUSY theory, the vacuum zero point energy problem, standing before any quantum field theory in M4, is solved. The particles in M4 themselves can be considered as excited states above the underlying quantum vacuum of background double spaces M4⊕ MSp, where the zero point cancellation occurs at ground-state energy, provided that the natural frequencies are set equal (q 2 0 ≡ νb = νf ), because the fermion field has a negative zero point energy while the boson field has a positive zero point energy. On these premises, we derive the two postulates on which the Special Relativity (SR) is based.

Power Consumption and Processing Time Estimation of CNC Machines Using Explainable Artificial Intelligence (XAI)

Due to environmental issues such as climate change, companies are required to optimize their resource and energy consumption in their production process. Predicting power consumption and processing time of all production facilities is essential for manufacturing to develop mechanisms to prevent energy and resource waste and optimize their use. Machine learning is a powerful tool for prediction tasks using data in digitalized environments. In this paper, we present power consumption and processing time prediction of CNC milling machines using five machine learning regression models, i.e., decision tree, random forest, support vector regression (SVR), extreme gradient boosting (XGBoost), and artificial neural network (ANN). Since most of those models are black-box, we applied two explainable artificial intelligence (XAI) approaches, SHapley Additive exPlanations (SHAP) and Local Interpretable Model-Agnostic Explanations (LIME), to give post-hoc explanations of the predictions given by the machine learning models. Our experiments indicated that random forest regression performed the best in predicting power consumption and processing time. The explanation showed that the number of axis rotations and the number of travels to the machine's zero point in rapid traverse were the most important factors that affected the processing time and power consumption. The companies using CNC milling machines can use our prediction models to optimally plan and schedule the operation of the milling machines in a time and energy-efficient manner. They can also optimize the factors that affect power consumption and processing time the most.

Transforming Quantum Scalar Potential into Kinetic Motion

There are three processes involved in deriving Kinetic Motion/Energy from Scalar Potential (aka Quantum Scalar Potential, Zero Point, Source, Dirac Sea, etc.) • This presentation discusses these three processes but not the countless details. All three processes have been discovered in the literature. It would take days or weeks to discuss each one of these processes. This presentation is as a simplified "snap shot".

Reviewing the Role of Virtual Particles in the Vacuum

Experimental evidence has established the existence of virtual particle pairs (VP) in the vacuum of space. The origin of these Virtual Particles is traced to the interacting waves of the Zero Point Energy (ZPE). The strength of the ZPE has been shown to increase with cosmic expansion, meaning the VP numbers would also increase simultaneously. Classical theory states that every time a charged particle undergoes an acceleration, it emits secondary radiation. The random waves of the ZPE impacting on all subatomic particles causes them to jitter (the ‘zitterbewegung’). This jitter results in extremely rapid and continuous changes in direction for all subatomic particles and thus ongoing accelerations. As a consequence, all particles will emit secondary radiation which, in turn, boosts the ZPE strength locally around massive objects (along with a corresponding increase in VP numbers). The role played by the ZPE and associated Virtual Particles in the vacuum is then explored in relationship to the speed of light as well as some other effects that were predicted by relativity. These effects can now be shown to have an actual physical cause related to the ZPE and associated Virtual Particles.

A CuO-modified ultrafiltration ceramic membrane inducing micro-nano bubble collapse to generate hydroxyl radicals for enhancing pollutant removal

It is desirable to develop ceramic membranes with functional performances for wastewater treatment. This work developed a CuO-modified Al2O3 ceramic membrane (CuO/Al2O3 CM) via a sol-gel method. The coated CuO particles provided hydrophobicity and a high zero point of charge for CM, which could accumulate H+ ions and form a liquid depletion layer on the membrane surface. When coupled with micro-nano bubbles (MNBs) in a neutral aqueous solution, the modified CM led to MNBs collapse through the accumulation of H+ and uneven expansion. This collapse generated high temperature sites that activated the CuO particles, leading to the production of reactive oxygen species (ROSs) through the interaction of CuO and surface OH–. Therefore, the modified CM could remove model pollutants (methylene blue) in a stable and high efficiency (88.91 %) through inducing MNBs collapse. Besides, the tests on the pure water flux, reusability and leaching revealed the modified CM had good fouling resistance, stability, and environmental friendliness. Mechanism analysis showed the ROSs, mainly hydroxyl radicals (·OH), were responsible for the methylene blue degradation. This work provides valuable insights into the development of functionalized membranes that can induce MNB collapse to enhance pollutant removal in wastewater treatment.