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(R1513) The Dynamical Study of Variable Mass Test Particle in Nonlinear Sense of Restricted 3-body Problem with Heterogeneous Primaries
Get PDFThe main idea of this paper is to study the non-linear stability property of the motion of the test particle which is moving under the influence of heterogeneous primaries having N-layers with different densities as well as varying its mass according to Jeans law. The system is also perturbed by the small perturbations in Coriolis as well as centrifugal forces. We evaluate the equations of motion of the test particle under the influence of the above said perturbations. From this system of equations of motion, we reveal analytically the locations of stationary points as well as the non-linear stability
Advancing Semen Evaluation Using Lipidomics
No full textDeveloping a deeper understanding of biological components of sperm is essential to improving cryopreservation techniques and reproductive technologies. To fully ascertain the functional determinants of fertility, lipidomic methods have come to the forefront. Lipidomics is the study of the lipid profile (lipidome) within a cell, tissue, or organism and provides a quantitative analysis of the lipid content in that sample. Sperm cells are composed of various lipids, each with their unique contribution to the overall function of the cell. Lipidomics has already been used to find new and exciting information regarding the fatty acid content of sperm cells from different species. While the applications of lipidomics are rapidly evolving, gaps in the knowledge base remain unresolved. Current limitations of lipidomics studies include the number of available samples to analyze and the total amount of cells within those samples needed to detect changes in the lipid profiles across different subjects. The information obtained through lipidomics research is essential to systems and cellular biology. This review provides a concise analysis of the most recent developments in lipidomic research. This scientific resource is important because these developments can be used to not only combat the reproductive challenges faced when using cryopreserved semen and artificial reproductive technologies in livestock such as cattle, but also other mammals, such as humans or endangered species
An Examination Of Police Perceptions And Attitudes Toward Juveniles In Texas
Get PDFThe purpose of this study was to examine police officers’ perceptions (opinions) and attitudes when interacting with juveniles given the officers’ individual demographics and organizational/departmental characteristics. Also, this study examined the officers’ reported demographics of the juveniles with whom they interacted to understand any possible influence on the interactions. This quantitative study involved officers completing a survey consisting of 42 questions divided into four sections that included: (1) demographics, (2) organization, (3) interaction with juveniles, and (4) police perceptions and attitudes. The organizational section addressed two sub-categories—cynicism and isolation. The 125 police officers in this study were solicited from 16 different police departments, both urban and rural in the State of Texas.
Through exploring officers’ age, race/ethnicity, socioeconomic status, education, experience, marital status, current rank/position as well as officers’ cynicism and isolation when interacting with juveniles, this study found that the demographic characteristics of officers were not significant except for amount of education and years iv of experience. Officers who had a high school or less level of education exhibited more favorable attitudes toward juveniles than those who had a bachelor’s degree as well as those with a graduate degree. Also, officers who had five or less years of experience possessed more favorable perceptions toward juveniles than those with 16 or more years of experience. Officers’ positions did not significantly impact their perceptions and attitudes when interacting with juveniles. The officers’ cynicism and isolation did significantly impact their perceptions toward juveniles. In addition, a significant linear relationship was found between police officers’ cynicism, isolation, and their attitudes toward juveniles. On the other hand, reported juvenile demographic characteristics, such as race, and gender had no impact on police officers’ perceptions and attitudes when interacting with juveniles. However, when the variables officer’s years of policing experience, juvenile’s race, and juvenile’s gender were controlled, the variable juvenile’s age contributed significantly to police attitudes toward juveniles
Microgrid Optimum Identification Location Using Standard and Accelerated Particle Swarm Optimization Techniques based on SCADA system
No full textIn recent years, a Microgrid has become significant and commonly use. A Microgrid has localized electricity sources and loads that connect to a centralized electrical power network when the need arises and disconnect to island mode. In this case, a microgrid can effectively integrate various sources of distribution generators that can supply, improve the voltage level on the transmission line by reducing the real power losses on it and providing emergency power, and improve the voltage level at the consumer end.
In this work, new technologies will permit power grids to be better prepared for future requirements. More flexible network management makes rising proportions of renewable energy supply compatible with conventional power plant infrastructure. The numbers and diversity of such decentralized power plants require a new type of management in the operation of power grids - an intelligent network or smart grid. Using a SCADA system will improve coordination between power demand and generation and use of modern information technology such as the Internet, sensors, controllers, and wireless transmission equipment and used Smart metering. In essence, digital electricity meters measure power consumption at the power grid\u27s endpoints. The Accelerated Particle Swarm Optimization technique will apply. It is a modern technique that appeared for optimization. It will compare with the standard Particle Swarm Optimization technique to perform the optimization operation of power flow in the transmission line by selecting the optimum location of distribution generator installed in power network considering minimum power losses with optimal operation consideration the no. of iteration, the execution time of program and capacity. One Wind Turbine DG (WTDG) is considered for the analysis. The entire study is carried out in MATLAB. Also, another optimization will use to select the type and location of FACTs devices to improve the system\u27s power flow and transient stability. The simulation results obtained for optimizing the nonlinear objective functions using the MATLAB program designates that APSO accomplishes roughly developments regarding computation time and best fitness
PROTOCOL: Effectiveness of parent-engagement programs to reduce truancy and juvenile delinquency: A systematic review
No full textThis review aims to synthesize the evaluation evidence for parent-engagement programs that focus on reducing juvenile truancy as the primary outcome. Delinquent behavior will be assessed as a secondary outcome when included. This objective is guided by the following research questions: (1) what is the effectiveness of parent-engagement programs for children in preschool (ages 4–5) through secondary education (ages 13–19) on primarily (a) reducing student truancy (i.e., unexcused or unauthorized absence) and secondarily (and when included) (b) reducing delinquent behaviors? (2) Is there variability in the effectiveness of parent-engagement programs across moderators such as gender, age, grade levels, settings, and contexts? (3) What factors (e.g., groups, settings, and contexts) explain the variability in the effectiveness of engagement programs in a multivariate framework?
Impact of interfacial barriers onthe oxidative stability of lipophilicbioactive compounds in oil-in-wateremulsions - The case of lutein
No full textOils, which consist of fatty acids (FA), are dispersed in the aqueous phase of food emulsions. Under food processing conditions (e.g., high heat, shear forces), and in the presence of oxygen, polyunsaturated fatty acids (PUFA) may become oxidized. It is generally accepted that the interfacial region, which is the contact region between the oil phase and the aqueous phase, represents a critical area in the emulsion system with regard to the development of oxidation. A better understanding of the relationship between the interfacial region (oil droplet size) and interfacial composition (emulsifier type) may allow the creation of stable food emulsions against oxidation. Emulsifiers work by stabilizing oils suspended in water, and this is achieved electrostatically. A part of an emulsifier is attracted to water while its other part is attracted to the oil. The effects of emulsifiers in limiting the transport of free radicals across the emulsion interface and its impact on the oxidative stability of lipophilic bioactive compounds is an area of active research. The transport of free radicals across the emulsion interface can be measured using a peroxide method. The free radicals are generated in the aqueous phase using 2,2\u27-azobis (2-amidinopropane) dihydrochloride (AAPH). The peroxide method can reveal the barrier properties of emulsifiers towards a water-soluble radical initiator (AAPH) in emulsion systems. Lutein, a xanthophyll carotenoid, was selected as a lipophilic bioactive compound (phytonutrient) model to evaluate the interfacial barrier properties of emulsifiers in an emulsion-based delivery system prepared with corn oil, which is high in PUFA. The lutein-loaded emulsions were formulated with the following emulsifiers: bovine casein; caprine casein (αs1-I); and caprine casein (as1-II). The peroxide value (PV) demonstrated that lutein-loaded emulsions stabilized with caprine casein (αs1-II) provided a significantly (p \u3c 0.05) enhanced interfacial barrier limiting the transport of peroxyl radicals across the oil-water interface. In agreement with PV measurements, chemical (color) stability results showed that lutein was most stable (p\u3c0.05) under the photo-oxidative conditions when emulsions were stabilized by caprine casein (αs1-II). The better interfacial barrier properties exhibited by caprine casein (αs1-II) can be used to create lutein-loaded emulsion formulations with improved chemical (color) stability for food and beverage applications.
Effect of fasting prior to electroejaculation on behavioral responses and reproductive parameters in young Simmental bulls
No full textThe objective of the present study was to evaluate the effect of 24 h\u27 fasting prior to semen collection by electroejaculation on behavioral responses, volume of rectal fecal content, bladder size, penis protrusion, erection, ejaculation stimuli, and ejaculate parameters in young Simmental bulls. Twenty-two Simmental beef bulls with an age of 13.2 ± 1.2 mo (mean ± SD) were used in a prospective randomized blinded controlled cross-over design with two pens fasted for 24 h (n = 9; FAS group), and the other three pens were non-fasted (n = 13; CON group). The bulls were maintained under confined conditions without access to pasture. One week later, the pen treatments were inverted, and semen was collected again under the same conditions and by the same team. The behavioral responses, volume of fecal rectal content, bladder size, as well as the number of stimuli required to obtain penis protrusion, erection, and ejaculation to electroejaculation were measured. The following ejaculate parameters were measured: volume, concentration, spermatozoa motility, and morphology. The behavioral response of the bulls to electroejaculation was not different between the CON group and the FAS group (3.2 ± 0.5 and 3.0 ± 0.7, respectively; P = 0.36). Bladder size was significantly reduced in the FAS group compared with the CON group (2.3 ± 0.8 vs. 2.8 ± 0.9, respectively; P = 0.02). The volume of feces in the rectum was not different between the two groups (CON was 2.3 ± 1.7 and FAS was 3.0 ± 1.8; P = 0.23). Compared with the CON group, the FAS group showed a higher proportion of penis protrusion (100% versus 81.8%, P = 0.10), erection (100% versus 81.8%; P = 0.10), and ejaculation (100% versus 90.9%; P = 0.49). The combined efficiency of penis protrusion, erection, and ejaculation (CE-PPEE) in the FAS group was superior to that of the CON group (P = 0.001). The number of stimuli necessary for penis protrusion, erection, and ejaculation for the CON group were 13.5 ± 3.7, 14.9 ± 3.7, and 20.8 ± 5.8, and they were 15.0 ± 4.2, 16.6 ± 4.2, and 20.2 ± 8.1 for the FAS group. The number of stimuli for penis protrusion (P = 0.09), erection (P = 0.08), and ejaculation (P = 0.77) were no different between the two groups. Ejaculate volume was 4.0 ± 2.6 ml and 4.1 ± 2.3 ml for the CON and FAS groups, respectively (P = 0.90). The motility was 1.4 ± 0.7 and 1.4 ± 0.8 for the CON and FAS groups, respectively (P = 0.72). The concentration of spermatozoa was 336.2 ± 273.1 million and 421.1 ± 300.6 million for the CON and FAS groups, respectively (P = 0.31). The percentage of normal spermatozoa was 50.9 ± 18.8 and 45.6 ± 14.3 for the CON and FAS groups, respectively (P = 0.16). It was concluded that fasting for 24 h prior to semen collection by electroejaculation reduced the bladder size and increased the proportion of bulls with penis protrusion, erection, and ejaculation without any difference detected in behavioral responses, volume of rectal fecal content, and ejaculate parameters
The mental health clinician’s role in advocacy for survivors of human trafficking: Treatment and management
No full textHuman trafficking (HT) affects a large number of populations worldwide, including men, women, and children. The traffickers exploit the vulnerability of the victims, including their poor socioeconomic status, political instabilities in their countries, and existing mental illness. They use fraud and coercion to involve these victims in forced labor or commercial sex. The victims encounter significant physical, emotional, and sexual trauma resulting in posttraumatic stress disorder along with depression, anxiety, and substance use disorder. Standard treatment protocols to man age the victims of HT do not exist. Trauma-informed care is key, as it provides the victims a sense of empowerment and safety while preventing retraumatization and enhancing treatment adherence. Mental health clinicians can play a significant role in providing services to the victims of HT. They can take the lead role in the integrated care model, which collaborates services with other stakeholders. They can also help provide training to other health care providers in identifying the victim, providing trauma-centered care, and establishing continuity of services. [Psychiatr Ann. 2021;51(8):373-377.]
Fourier transform method for the electrostatic self-energy of a solid sphere with uniform volume charge density
No full textThe problem of a solid sphere with uniform volume charge density is encountered in virtually all undergraduate calculus-based physics textbooks dealing with the topic of electromagnetism. This example illustrates well the use of Gauss\u27s law and from there one can easily derive all the quantities of interest such as electrostatic field, potential, self-energy, and so on. Undergraduate physics majors are also well aware of the theory of Fourier transforms from having taken mathematics courses. Nevertheless, despite its great utility, the Fourier transform method is rarely mentioned as a powerful tool to solve physics problems at this level. To address this shortcoming, in this work we propose a possible scenario which may allow an instructor to introduce this powerful method to a proper undergraduate audience without any major pedagogical drawback. The case study that we choose is that of a solid sphere with uniform volume charge density. Specifically, we show the calculation of its electrostatic self-energy by using Fourier transform techniques. The main idea of this work is to draw reader\u27s attention to the versatility of the approach that can, in principle, be applied to other more geometrically complicated bodies where Gauss\u27s law does not lead to simple solutions. Concurrently, this work also provides instructional approaches that intertwine content-specific and pedagogical viewpoints that can be useful to all undergraduate students and teachers who wish to enhance their command of the subject
CAHS researchers receive provisional patent for potential plant sweetener
Get PDFThe plant is a perennial herb native to southern Mexico, the Caribbean, Central America, Colombia, and Venezuela. It is commonly known as the Aztec sweet herb, bushy lippia, honey herb, or hierba dulce, used as a natural sweetener and medicinal herb in its native Mexico and parts of Central America. The Aztecs used it and introduced it to the Spanish when they arrived. A compound called Hernandulcin, whose sweetness is about 1,000 times higher than in sucrose, provides the plant’s sweet taste.The plant has low Hernandulcin production in its tissues. Despite its sweetness, it isn’t used in the natural sweetener industry due to its complexity, difficulty in chemical synthesis, and the presence of another camphor. This aromatic compound gives an unpleasant taste to the natural extract.https://digitalcommons.pvamu.edu/datasets-collection/1000/thumbnail.jp