bluuebunny/crossref_metadata_2025_split huggingface dataset:
Analysis of relationship between mangrove ecology to fish cultivator in Kertomulyo, Pati
Authors: Putri A P , Susiloningtyas D , Handayani T 
Published: July 2021

Abstract
Kabupaten Pati is located at north coast of java which has abundant fishery potential. This potential is built by too many factors, and one of them is mangrove ecosystem. Mangrove ecosystem are complex and dynamic. The purposes of this study is to analyze the relationship of mangrove ecosystems on ecological between fish production by fish cultivator at Kertomulyo Pati. The research is located at Kertomulyo Village, Pati. This study uses a quantitative descriptive approach with questionnaire and interview, observation and documentations methods and the target is fisherman who lives near the mangrove ecosystem. The data needed by this research were devided into two sources, primary data and secondary data. Primary data includes the production from fish cultivator and their perception?? about mangrove, secondary data is image from Google Earth and Landsat 8 for vegetation which is needed to know the changes of mangrove’s thickness and growth. The next step is running the data using ArcGis. Then the result of this analysis can be associated with fish cultivator’s production. So, there will be results which is answering the purposes.
Fe (III) adsorption using Fe (III) ionic imprinted polymer from polyeugenoxy acetate crosslinked with ethylene glycol dimethacrylate (EGDMA)
Authors: Djunaidi M C , Aini A Q , Widodo D S , Lusiana R A , Suseno A 
Published: July 2021

Abstract
Ionic Imprinted Polymer (IIP) with polyeugenoxy acetate (PA) as the base polymer, EGDMA as the crosslinking agent, and AIBN as the initiator have been synthesized to adsorb Fe(III) metal ions. NIP (non-imprinted polymer) was used as a comparison for this study. The produced polymer was characterized using FTIR spectroscopy and SEM-EDX. Adsorption rate and capacity were examined through adsorption isotherm and kinetics studies for all adsorbents. The adsorption selectivity test was done with mixed-metal solutions of Zn(II), Cu(II), Cd(II), and Ag(I). The results of SEM analysis on IIP-PA show a more uniform and regular size than NIP-PA. Adsorption of Fe(III) in IIP-PA and NIP-PA follows pseudo-second-order kinetics, and the adsorption isotherm both follow the Langmuir theory. The adsorption capacity of Fe(III) metal ions in IIP-PA is 10.88 mg/g, and the adsorption capacity of NIP-PA is 7.94 mg/g. The mechanism of adsorption of Fe(III) metal ions in IIP-PA and NIP-PA was dominated by hydrogen bonds between the -COOH groups and Fe(III). In binary solutions, IIP-PA adsorption selectivity coefficient is higher than NIP-PA with the order of Fe(III)/Zn (II)>Fe(III)/Cu(II)>Fe(III)/Cd(II)>Fe(III)/Ag(I)
Solanum lycopersicum and Daucus carota: effective anticancer agents (a mini review)
Authors: Ademosun O T , Adebayo A H , Ajanaku K O 
Published: July 2021

Abstract
The high cost, scarce availability, and some extraneous side effects of some pharmaceuticals have diverted the majority’s mindset towards the use of nutraceuticals as both prophylactic and therapeutic alternatives. The cancer incidence in the low and middle-income countries has risen due to several factors, but notably, it has been due to poverty and the non-availability of screening centers. The non-toxic nature, high availability, and low cost of food-based nutraceuticals have been a significant advantage to its users. Solanum lycopersicum is well-known to possess excellent antioxidant, anti-inflammatory, and anticancer potential, and this has been attributed to its potent bioactive compound, lycopene. The presence of β-carotene in Daucus Carota has also contributed immensely to its antioxidant and anticancer properties. Nutraceuticals are considered suitable for anticancer drug development due to their pleiotropic actions on target sites with multiple effects. This short review has explored the dietary characteristics, bioactive components and mild anticancer effects of tomatoes and carrots.
The protection of fish gelatine and arabic gum as coating materials to the quality chlorophyll Caulerpa racemosa encapsulation
Authors: Dewi E N , Perdana N E , Purnamayati L 
Published: July 2021

Abstract
Chlorophyll from Caulerpa racemosa is a pigment that has the potential to be used as a natural coloring agent. However, chlorophyll is susceptible to high temperatures. Microencapsulation is a technology that can protect chlorophyll degradation. The purpose of this study was to determine the effect protection of fish gelatine and Arabic gum combination as a coating material to the quality of chlorophyll microencapsulation from C. racemosa. Five different combination formulations of coating materials composed by fish gelatine and Arabic gum at ratio (w/w) 0%:10% (A), 0.5%:9.5% (B), 1%:9% (C), 1.5%:8.5% (D), 2%:8% (E) were applied to chlorophyll microencapsulation process. The microcapsules quality were tested for yield, solubility, dissolved solids, bulk density, moisture content, chlorophyll levels, and a degree of lightness test. Other analyses such as FTIR, SEM and DSC confirmed availability of chloropyll in microcapsules. The result showed that the formulation of C (combination of fish gelatine and Arabic gum at ratio (w/w) 1%:9%) has a high solubility of 97.75% and low water content of 3.57%, encapsulation efficiency of 68.95%, the density of 0.427 g/cm3 and chlorophyll level of 18.46 mg/L. The presence of chlorophyll was indicated at wavelengths of 1583–1709, 2809–3012, and 3029–3639 nm−1.
Physicochemical characterization of kappa-iota carrageenan gel with papain enzyme
Authors: Fransiska D , Utomo B S B , Darmawan M , Gozali D , Iqbal M N 
Published: July 2021

Abstract
Carrageenan is a group of galactose polysaccharides extracted from seaweed and has the ability to form a thermo-reversible gel or a viscous solution when added to the salt solution widely utilized as gelling, thickener and stabilizers in various industries such as food, pharmaceuticals, cosmetics, printing, and textiles. Only two types of carrageenan can be used in the manufacture of hydrogels which are kappa and iota. Kappa-carrageenan is produced from the tropical seaweed Kappaphycus alvarezii and Eucheuma denticulatum is the main species producing iota-carrageenan. The aim of this research is to know the composition of kappa-carrageenan and iota-carrageenan mixture as gel base to produce the optimum physical properties and to know the physical properties of optimum formula with the addition of papain enzyme for 4 weeks storage. The determination of the optimum formula of mixed carrageenan kappa and iota gel with Simplex Lattice Design method. The physical properties of the optimum formula with the addition of papain enzyme during 4 weeks storage are viscosity, pH, dispersion, and sineresis of optimum formula were statistically verified using Anova Univariate method of experimental design of two factorial with 95% confidence level. The results showed that the optimal formula of mixed carrageenan kappa and iota respectively concentrations of 0.3%, 1% and the use of 0.8% papain enzyme.
The effectiveness of anode variations for electrocoagulation and its application for laundry wastewater treatment
Authors: Suhartana  
Published: July 2021

AbstractSince Diponegoro University moved its campus to the Tembalang area, it has been full of issues of decreasing groundwater quality and aesthetic decline caused by laundry wastewater and washing and toilet wastewater which has growing rapidly along with the growth of boarding houses in the Tembalang area. This will have an impact on the health quality of the people who live in the Tembalang area. This study aims to reduce the content of dissolved organic matter in laundry wastewater and bath wash also bath, wash and toilet wastewater. The method chosen was the electrocoagulation method, using 2 different electrodes. The electrodes chosen are aluminum metal and ferrous metal (as anode) and carbon (as cathode). With the electrocoagulation method using aluminum electrodes (as anode) and carbon (as a cathode) the amount of organic material that could be removed was 60.1%. Meanwhile, with ferrous metal (as anode) and carbon (as cathode) the amount of organic material that can be removed is smaller, namely 52.2%. The addition of 100 ppm NaCl solution and 100 ppm Na2SO4solution was able to increase the efficiency of organic matter removal by 1.8-2.5%.
Synthesis of sulfonated poly-(eugenol divinylbenzene) nanosilver composite and its application as antibacterial compound of cotton fabric
Authors: Prasetya N B A , Asiyah A , Sarjono P R , Ngadiwiyana N , Ismiyarto I 
Published: July 2021

Abstract
In recent years, nano-sized composite particles have been developed as antibacterial agents. We investigated antimicrobial activities of sulfonated poly-(eugenol divinylbenzene) nanosilver composite coated on cotton fabric. Firstly, sulfonated poly-(eugenol divinylbenzene) was synthesized through a cationic copolymerization between eugenol and divinylbenzene, followed by sulfonation using sulfuric acid. Furthermore, the nanosilver material was synthesized by reducing silver nitrate using sodium citrate solution as a reducing agent. The composite formation has been successfully carried out through the interaction of the polymer and nanosilver. The resulting inhibition zone diameter of copolymers and composites shows moderate inhibitory activity. The data shown by SEM-EDX reveals that the spray coating method is successful in making the composites coated well on cotton fabrics. Coated cotton fabric has hydrophobic properties and exhibits good antibacterial activity against E. coli and S. aureus bacteria.
The Cosmological Decrease of Galactic Density and the Induced Retarded Gravity Effect on Rotation Curves
Authors: Yahalom Asher 
Published: July 2021

Abstract
Galaxies are huge physical systems having dimensions of many tens of thousands of light years. Thus any change at the galactic center will be noticed at the rim only tens of thousands of years later. Those retardation effects seems to be neglected in present day galactic modelling used to calculate rotational velocities of matter in the rims of the galaxy and surrounding gas. The significant differences between the predictions of Newtonian instantaneous action at a distance and observed velocities are usually explained by either assuming dark matter or by modifying the laws of gravity (MOND). In this paper we will show that taking general relativity seriously without neglecting retardation effects one can explain the radial velocities of galactic matter without postulating dark matter. However, this will rely on a temporal change of galactic mass. We will compare two different mechanisms of density change, one is local, that is accretion of matter from the intergalactic medium. The other is global, that is the cosmological decrease of density due to the cosmic expansion. It will be shown that local effects are much more important in this respect.
Revisiting two well studied galaxy samples using alternative gravity
Authors: O’Brien James G. , Chiarelli Thomas L. , Kerin William M. , Belanger Jon 
Published: July 2021

Abstract
In the last few years, alternative gravity theories have seen increased interest due to the lack of observational evidence of dark matter. Further, new empirical patterns found in rotation curve data such as the Radial Acceleration Rule (RAR) have given new testable features for gravitational theories. In this paper, we revisit two popular surveys of galaxies (Randriamampandry et al 2013 and Bottema et al 2015) which when published were shown to be problematic for alternative gravity. Here, we apply the most recent observational parameters to the surveys and provide fits of Conformal Gravity, MOND as well as the RAR rotation curve formalism and show how these theories can apply to the new findings. We also provide the fits to the RAR and Tully-Fisher relation for each theory and discuss how the RAR may allow for some confining of parameters in the fitting procedure.
Spin and entanglement in general relativity
Authors: Horwitz Lawrence P. 
Published: July 2021

Abstract
In a previous paper, we have shown how the classical and quantum relativistic dynamics of the Stueckelberg-Horwitz-Piron [SHP] theory can be embedded in general relativity (GR). We briefly review the SHP theory here and, in particular, the formulation of the theory of spin in the framework of relativistic quantum theory. We show here how the quantum theory of relativistic spin can be embedded, using a theorem of Abraham, Marsden and Ratiu, and also explicit derivation, into the framework of GR by constructing a local induced representation. The relation to the work of Fock and Ivanenko is also discussed. We show that in a gravitational field there is a highly complex structure for the spin distribution in the support of the wave function. We then discuss entanglement for the spins in a two body system.
Observers, observations and referencing in physics theories
Authors: Ben-Ya’acov U 
Published: July 2021

Abstract
Is it possible to encompass the full extent of the universe within a theory based on a finite set of first principles and inference rules?
The r^ole of observers and observations in physics theories is considered here in the light of G¨odel’s incompleteness theorem. Physics theories are the sum-total that we – humans, scientists, physicists – can make in interpreting our observations of the universe. We are integral part of the universe, together with our observations, therefore acts of observation are also observables and should become part of the phenomena considered by the theory, especially in view of the fact that arbitrarily chosen modes of observations may essentially determine empirical results.
Incompleteness arises in G¨odel’s theorem with self-referential propositions. Observations and interpretations are acts of referencing, and self-referencing occurs in physics whenever the observer is recognized as being part of the observed system. If self-reference appears in physics in simile to G¨odel’s theorem, then incompleteness seems unavoidable in physics.
The article discusses observers and observations as referencing in physics, culminating with the understanding that they are hierarchically inter-related so that a universal physics theory cannot be complete.
The attributes of the Spin-Charge-Family theory giving hope that the theory offers the next step beyond the Standard Model
Authors: Mankoč Borštnik N.S. 
Published: July 2021

Abstract
The assumptions of the standard model are still waiting for an explanation. The spin-charge-family theory is promising in offering not only the explanation for the standard model postulates for quarks and leptons and vector and scalar gauge fields, but also for the cosmological observations, like there are the appearance of the dark matter, the matter-antimatter asymmetry, making several predictions. This theory assumes that the internal space of fermions (spins, handedness and all the charges) are described by the Clifford algebra in d > (13 + 1)-dimensional space, representing in d = (3 + 1) all by the standard model required properties of quarks and leptons and antiquarks and antileptons, with families included. Fermions interact with gravity only (the vielbeins and the two kinds of the spin connection fields), manifesting in d = (3 + 1) as all the vector gauge fields and the scalar gauge fields (higgs scalars and Yukawa couplings). In this talk I overview shortly the achievements of the spin-charge-family theory so far, explaining in particular the new way of the second quantization of fermions, offered by the description of the internal space of fermions with the anticommuting Clifford algebra objects of the odd character.
Massless particle of any spin in static uncharged spherically symmetric curved spacetimes
Authors: Moalem Amnon , Gersten Alexander 
Published: July 2021

Abstract
Quantum equations for massless particles of any spin in static spherically symmetric spacetimes, namely, the Minkowski, FRW and Schwarzschild spacetimes are considered. The metrics of all three are diagonal and their corresponding E2
2 and E3
3 inverse veirbein fields are identical. Thus the angular wave functions are spherical harmonics spinors corresponding to simple modes specified by orbital angular momenta and their z component. By applying consistently a procedure based on variables separation it is shown that the radial wave functions are second order ordinary differential equations sharing the same homogeneous equation though nonhomogeneous terms are different depending on the characteristic E0
0 and E1
1 of each spacetime.
About stabilization in large of gyrostat programmed motion with cavity filled with viscous fluid
Authors: Bezglasnyi S P 
Published: July 2021

Abstract
This paper is concerned with the control problem of nonautonomous programmed attitude motions around the mass centre of a gyrostat with fluid. The goal of this research is to investigate how to solve the problem of stabilization in large the specified programmed attitude motion of gyrostat. Within the framework of this note, the model of single-rotor dynamically symmetrical gyrostat which includes a spherical cavity filled with highly viscous fluid is considered. The program control forces and the stabilizing control forces acted upon the gyrostat are received. The main research methods proposed in this article are the method of Lyapunov functions and the method of limit equations and limit systems. Numerical simulation results illustrate and verify that stabilizing in large programmed attitude motions problem of a gyrostat with viscous fluid is solved.
Attitude motion control of heavy solid body without velocities measurement
Authors: Bezglasnyi S P , Dorogovtseva E V 
Published: July 2021

Abstract
Attitude motion of solid body around a fixed point in the uniform field of gravity is considered. The main result is that some new control method for attitude motion of rigid body without velocities measurement is presented. Two problems of the arbitrary position stabilization and attitude stationary motion stabilization are solved. The stabilizing controls are constructed by the feedback principle without measurement of velocities. This problem is relevant and has an important applied value in engineering. Main results can be used for gyroscopic control systems designing of aircrafts.
A method of generative model design based on irregular data in application to heat transfer problems
Authors: Bykov Nikolay , Hvatov Alexander , Kalyuzhnaya Anna , Boukhanovsky Alexander 
Published: July 2021

AbstractThe paper presents the results of applying the generative design method to reconstruct a model driven by irregular data in the form of a partial differential equation. The problem of non-stationary heating of a metal rod is considered as an example. The finite element method is used to construct templates of possible elements of the derived differential equation. The optimization algorithm for determining a model design is based on the procedure of best subset selection. The efficiency of the method for derivating a model of the thermal conduction process based on irregular data is shown. As irregular data, data obtained on spatial meshes with alternating steps of different size, or a step changing in arithmetic progression, are considered.
On the motion of an Earth satellite after fixing the magnitude of its acceleration as a problem with nonholonomic third-order constraint
Authors: Dodonov V V , Kozlova A S 
Published: July 2021

Abstract
The motion of an artificial Earth satellite with constant absolute value of the acceleration is considered. This requirement is equivalent to imposing a second-order nonlinear nonholonomic constraint or a third-order linear nonholonomic constraint. Two theories of motion of nonholonomic systems with high-order constraints are used for solving this problem. According to the first theory, a consistent system of differential equations is constructed with respect to the generalized coordinates and the Lagrange multipliers; the second theory is based on the application of the generalized Gauss principle. The results are different, although the constraints are satisfied in both theories. It turns out that infinitely many solutions can be built, but using these theories one can find two specific solutions. The question of the difference of these two solutions from the set of all other possible solutions is raised. We also simplify the previously obtained differential equations. The transition to dimensionless variables is made. Three parameters of motion prior to imposition of the constraint are single out, which control the motion after the application of the constraint. The solutions obtained from these theories of motion of nonholonomic systems are compared.
Elastic-plastic analysis of reinforced concrete frame buildings: Developing a new software package
Authors: Ibraheem Anas 
Published: July 2021

Abstract
In this work we will explain a new methodology that have been utilized in a new software package (program) to determine the lateral loads at which a 3D reinforced concrete frame building collapses. The solution is represented by forming the capacity curve (force–displacement) of the structure taking into account the elastic-plastic behavior of the element materials represented by plastic hinges positioned at the ends of the linear elements. This work takes into account only the plastic hinges caused by bending moments. The program is based on finite elements method and capable of analyzing and designing three dimensions buildings. The program provides a drawing environment (3D view, plan view, elevation view) with tools to create the model and to perform the structural analysis and design.
Patient-specific simulation of the blood flow in a proximal femoral artery-graft junction
Authors: Ivanova Y F , Tikhomolova L G , Yukhnev A D , Gataulin Y A , Smirnov E M , Kalmikova R V , Morozov A N , Suprunovich A A , Vrabiy A A , Khubulava G G 
Published: July 2021

Abstract

The paper presents a computational procedure developed for patient-specified blood flow simulation in the proximal anastomosis of femoral-popliteal bypass. The calculations are based on a three-dimensional geometric model constructed from a CT angiography scan of the vascular bed in the anastomotic region and boundary conditions obtained by ultrasound Doppler measurements of the velocity in control sections of the bed. A numerical analysis of 3D pulsating flow structure in a particular model of the proximal anastomosis has been carried out. The model includes sections of the common femoral artery (CFA), the graft, the deep femoral artery and the superficial femoral artery. The Reynolds number based on the CFA inner diameter and the inlet bulk velocity is 880. The sizes and location of stagnant zones, areas with low values of the time-averaged wall shear stress modulus and with high values of the oscillatory shear index are determined. It is shown that the results of the prediction of areas with low values of the time-averaged shear stress modulus are in qualitative agreement with the data of local measurements of neointima thickness formed along the graft wall one year after the operation.
On nonlinear oscillations of time-periodic Hamiltonian systems in the presence of double fourth-order resonances
Authors: Kholostova Olga 
Published: July 2021

Abstract
The motion of a time-periodic Hamiltonian system with two degrees of freedom in a neighborhood of a linearly stable equilibrium is investigated. A double fourth-order resonance (of fundamental and combination types) is assumed to be realized in the system, or the parameters of the problem are close to the resonance values. The problem of the existence and number of resonant periodic motions in a small neighborhood of the equilibrium is investigated; the conditions for their stability in the linear approximation are analyzed. The results are applied to the problem of the motion of a dynamically symmetric satellite (a rigid body) near its stationary rotation (cylindrical precession) in the central Newtonian gravitational field in an elliptical orbit of arbitrary eccentricity.