Current Placement Research Articles

A mobile electrical stimulator for therapeutic modulation of the vestibular system — design, safety, and functionality

Low-intensity noisy galvanic vestibular stimulation (nGVS) is a promising non-invasive treatment for enhancing vestibular perceptual performance and postural control in patients with chronic vestibular hypofunction. However, this approach has so far been studied mainly under laboratory conditions. Evidence indicates that continuous application of nGVS in daily life is necessary for it to be effective. To address this need, we have developed a mobile nGVS stimulator and conducted a series of pilot studies to evaluate its safety, tolerability, functionality, and therapeutic effects. The device is a lightweight, compact, and portable AC stimulator featuring a user-friendly interface for the individualized adjustment of nGVS parameters. It includes an integrated motion sensor that automatically activates stimulation during body movement and deactivates it during inactivity, optimizing its practical use in real-world settings. The stimulator adheres to strict safety standards and, in initial long-term use, has exhibited only mild side effects (e.g., skin irritation and headaches), likely attributable to the current electrode placement, which requires further optimization. As expected, the device consistently elicits known vestibular sensorimotor reflex responses in healthy individuals. Importantly, further pilot studies in healthy participants demonstrate that the device can reliably replicate known facilitating effects on vestibular perception and postural control. Together, these findings suggest that this mobile stimulation device can facilitate the translation of nGVS into therapeutic everyday use.

Italian Evaluation and Excellence in REMS (ITAL-EE-REMS): appropriate placement of forensic patients in REMS forensic facilities

BackgroundWe set out to assess the appropriateness of current placement of mentally disordered offenders allocated by the courts in Italy to REMS or to forensic community residences. We hypothesised that as in other countries, the match between a standardised assessment and the decision of the court would be imperfect.MethodsThe DUNDRUM Toolkit was translated into Italian. The translation had good psychometric properties. In order to compare the current level of therapeutic security with a calculated safest current placement, we compared the DUNDRUM-1 triage security assessment of need for therapeutic security prior to treatment, with evidence for progress made in treatment (DUNDRUM-3) and forensic recovery (DUNDRUM-4). The more conservative of these two would be taken as the safe current level of need for therapeutic security.ResultsThe Italian translation of the DUNDRUM Toolkit had good internal consistency and mean scores had a Reliable Change Index less than one unit. 3.7% of those in REMS (medium security) were assessed as needing high security and 38% were ready to move to a less secure place. In low secure places, 56% were assessed as needing a higher level of therapeutic security and 6% could have moved to open non-secure places.ConclusionsThe Italian translation of the DUNDRUM Toolkit allows an assessment of the current working of the model of care for forensic psychiatry following the reforms of 2015. Most patients are safely placed. A small but important proportion needed high secure places that are not currently available. (3.7% of 604 nationally, 95% Confidence Interval 1.2% to 8.4%, 7 to 50). A greater use of such measures would enable better health gains and safer outcomes.Trial registration ClinicalTrials.gov ID: NCT06018298 Unique Protocol ID: ITAL-EE-REMS.

On some Calcaronea (Porifera: Calcarea) from the Barents Sea and adjacent Polar Basin

Four common calcareous sponge species from the Arctic are described. One species, Sycandra rappi Morozov sp. nov. is new to science. It differs in the complement of spicules from S. utriculus (Schmidt, 1869). In the latter case, there is an additional kind of spicule, small sickle-shaped diactines, in the distal cones; these spicules are absent in the new species. Additionally, current placement of the genus Sycandra Haeckel, 1872 in the family Grantiidae Dendy, 1892 is discussed. Sycetta asconoides (Breitfuss, 1896) has been relocated to the genus Grantia Fleming, 1828, as we found cortical triactines in the examined material, including type specimen slides. The fourth species, Grantia arctica (Haeckel, 1872), is described from the Franz Joseph Land for the first time. The biogeography of the Arctic calcareous sponges is also briefly discussed.

Current potential patches

A novel form of the current potential, a mathematical tool for the design of stellarators and stellarator coils, is developed. Specifically, these are current potentials with a finite-element basis, called current potential patches. Current potential patches leverage the relationship between distributions of magnetic dipoles and current potentials to explore limits of the access properties of stellarator coil sets. An example calculation is shown using the Helically Symmetric Experiment (HSX) equilibrium, demonstrating the method's use in coil design and understanding the limits of the access properties of coil sets. Current potential patches have additional desirable properties such as of promoting sparse current sheet solutions and identifying crucial locations of shaping current placement. A result is found for the HSX equilibrium that shaping currents covering only 22% of the winding surface are sufficient to produce the equilibrium to a good accuracy, provided a toroidal field is generated by an exterior coil set.

Experiences of Using a Digital Guidance and Assessment Tool (the Technology-Optimized Practice Process in Nursing Application) During Clinical Practice in a Nursing Home: Focus Group Study Among Nursing Students.

Nursing students' learning during clinical practice is largely influenced by the quality of the guidance they receive from their nurse preceptors. Students that have attended placement in nursing home settings have called for more time with nurse preceptors and an opportunity for more help from the nurses for reflection and developing critical thinking skills. To strengthen students' guidance and assessment and enhance students' learning in the practice setting, it has also been recommended to improve the collaboration between faculties and nurse preceptors. This study explores first-year nursing students' experiences of using the Technology-Optimized Practice Process in Nursing (TOPP-N) application in 4 nursing homes in Norway. TOPP-N was developed to support guidance and assessment in clinical practice in nursing education. Four focus groups were conducted with 19 nursing students from 2 university campuses in Norway. The data collection and directed content analysis were based on DeLone and McLean's information system success model. Some participants had difficulties learning to use the TOPP-N tool, particularly those who had not attended the 1-hour digital course. Furthermore, participants remarked that the content of the TOPP-N guidance module could be better adjusted to the current clinical placement, level of education, and individual achievements to be more usable. Despite this, most participants liked the TOPP-N application's concept. Using the TOPP-N mobile app for guidance and assessment was found to be very flexible. The frequency and ways of using the application varied among the participants. Most participants perceived that the use of TOPP-N facilitated awareness of learning objectives and enabled continuous reflection and feedback from nurse preceptors. However, the findings indicate that the TOPP-N application's perceived usefulness was highly dependent on the preparedness and use of the app among nurse preceptors (or absence thereof). This study offers information about critical success factors perceived by nursing students related to the use of the TOPP-N application. To develop similar learning management systems that are usable and efficient, developers should focus on personalizing the content, clarifying procedures for use, and enhancing the training and motivation of users, that is, students, nurse preceptors, and educators.

Ripples in the Water: Physical Education Teacher Education Program Influence on Graduates’ Perceptions of Expanded Physical Activity Programming

Physical educators are often asked to promote whole-school physical activity programming beyond their scheduled class times. Previous research has supported that training in expanded roles would be beneficial during university-based physical education teacher education (PETE) training. In this qualitative study, 13 graduates from a single PETE program that has integrated expanded physical activity into programming shared information about their current programming as physical education teachers in K–12 schools. Campus visits and one-on-one interviews were included. Some practices and values learned during participants’ PETE training were evident in graduates’ current practices. Aligning with previous studies of professional socialization of physical educators, the resulting themes concluded that (a) strategies and resources gained during PETE training were valued and still used and (b) other ripples of influence, such as administrators and other teachers at their current placement, influenced programming. PETE programming with whole-school physical activity can lead to expanded teaching practices in schools.

Comparative sperm morphology of 15 species of limpet (Mollusca: Patellogastropoda: Lottioidea) and correlation with current systematics and phylogenies

ABSTRACT The spermatozoa of 14 species (four genera) of Lottiidae and one species of Acmaeidae are described by transmission electron microscopy. All have ect-aquasperm, which are relatively small, morphologically simple, free-swimming sperm produced by species with external fertilization. Based on the size, shape and structure of the nucleus and acrosome, as well as features of the mid-piece, several morphological sperm ‘types’ are recognized within the species of Lottioidea described by the present and several previous studies. Sperm morphology largely supports current taxonomy as well as systematic and phylogenetic relationships. However, the morphology of the sperm of Lottia dorsuosa suggests that its generic status should be re-examined. The sperm morphology of Niveotectura pallida (formerly Acmaea pallida) is more similar to that of species of Tectura than of Acmaea mitra, supporting the current placement of N. pallida in the Lottiidae. This result is at odds with the close relationship between N. pallida and A. mitra indicated by recent phylogenies based on molecular data.

Revision of the Neotropical Obscure Genus Ebenia Macquart 1846 (Diptera, Tachinidae, Dufouriini)

The Neotropical genus Ebenia Macquart, 1846, is a member of the tribe Dufouriini (Dexiinae), and before the current work, comprised four species, viz. E. claripennis Macquart 1846, E. fumata (Wulp, 1891), E. neofumata Santis & Nihei, 2022 and E. trichopoda (Wulp, 1891). The present taxonomic revision results in a new generic synonymy: Comyops Wulp, 1891 syn. nov. of Ebenia. The following two new combinations result from this act: E. nigripennis (Wulp, 1891) comb. nov. and E. striaticollis (Wulp, 1891) comb. nov. both originally described in Comyops. In addition, the species originally described as Homodexia spinosa Bigot, 1889 is moved from its current placement in Thelairodes Wulp, 1891 to Ebenia as Ebenia spinosa (Bigot, 1889) comb. nov. A new specific synonymy is proposed for this last species: Morinia trichopoda Wulp, 1891, previously treated as a valid species of Ebenia, becomes a junior synonym of E. spinosa. All valid species are redescribed and photographed with the first description and illustration of the male terminalia for E. claripennis, E. neofumata and E. nigripennis and female terminalia for E. spinosa. Additionally, lectotype fixations are made for E. nigripennis and M. trichopoda. Finally, an updated diagnosis for the genus Ebenia and a key to the six known species are provided.

A maximum entropy deep reinforcement learning method for sequential well placement optimization using multi-discrete action spaces

Well placement optimization is a crucial method to solve the planar conflicts in reservoir development, mainly to determine the optimal well locations and drilling sequence to maximize the economic benefits of reservoir development. However, the current well placement optimization methods face the problems of high-dimensional discretization of optimization variables and lack of effective incentives for policy exploration, which make it challenging to improve the global optimization ability (the ability to jump out of locally optimal solutions in time and continuously search for better solutions in the whole optimization process) and real-time adjustability of the well placement optimization methods under limited numerical simulation times. In this paper, we propose a new sequential well placement optimization method, based on the Discrete Soft Actor-Critic Algorithm (DSAC), which incorporates the maximum entropy mechanism to formulate well placement and drilling sequencing schemes more efficiently and maximize the net present value (NPV) over the entire life cycle of reservoir development. Specifically, the method models the well placement optimization problem as a Markov Decision Process (MDP) and achieves sequential well placement optimization by training a Deep Reinforcement Learning (DRL) agent that maps reservoir states to a stochastic policy of well placement variables as well as evaluates the value function of the current policy. The DRL agent can determine the optimal infill well location in real-time based on the reservoir state at different times during the development process, thus obtaining the optimal drilling sequence. The proposed method in this paper has two innovations. First, by reconstructing the large-scale discrete action space of well placement optimization variables into multi-discrete action spaces, and with the maximum entropy mechanism, policy exploration is encouraged to improve the global optimization capability. Second, the trained policy can swiftly adapt the subsequent well placement scheme for a specific state of the target reservoir without the requirement to initiate training from scratch, which can realize the offline application of the trained policy and has better real-time adjustability. To verify the effectiveness of the proposed method, it is tested in 2D and 3D reservoir models. The results show that DSAC not only outperforms the gradient-based optimization method, classical evolutionary algorithms, and existing reinforcement learning proximal policy optimization (PPO) method in terms of global optimization ability but also shows better real-time adjustability of the trained policy when applied offline.

Cup Placement in Thumb Carpometacarpal Joint Prostheses: The Role of the Guidewire

The increasing use of thumb carpometacarpal joint prostheses for advanced CMC 1 (carpometacarpal) joint arthritis reflects the success of the latest prosthesis generations, which has been achieved through their improved functional outcomes and lower complication rates. Precise alignment of the prosthesis cup parallel to the proximal joint surface of the trapezium is essential for stability and the prevention of dislocation. This is a challenging surgical step, particularly for surgeons new to this technique. Despite adequate positioning of the guidewire, misplacements of the cup may occur, necessitating intraoperative revision. This study examined the deviations in cup and guidewire positioning in thumb carpometacarpal joint prosthesis implantations by inexperienced and experienced surgeons through radiological analysis of 65 prostheses. Both inexperienced and experienced surgeons achieved precise guidewire positioning with mean deviations of<2.2°. Inexperienced surgeons showed significantly larger cup deviations in the dorsopalmar and lateral view (7.6±6.1° and 7.3±5.9°) compared with experienced surgeons (3.6±2.7° and 3.6±2.5°; p=0.012, p=0.017). The deviation of the cup position exhibited by inexperienced surgeons tends to be in the direction opposite to the initial guidewire position (p<0.0038). The results highlight the current challenges in cup positioning depending on a surgeon's level of experience, questioning the reliability of the current guidewire placement.

Novel Resin-Coated Sand Placement Design Guidelines for Controlling Proppant Flowback Post-Slickwater Hydraulic Fracturing Treatments

Summary Resin-coated sand (RCS) is an effective way for controlling post-stimulation proppant flowback. However, with the shift to slickwater treatment fluids, the “tail-in” placement approach has proved to be less efficient for complete flowback control due to the proppant settling characteristics of using low-viscosity fluids. A new RCS placement approach was developed based on the results of several flowback studies. Trial wells were completed in different US basins with successful results. Proppant flowback samples were collected during different stages of drillout and production from wells using slickwater fluid systems. Thirty-five wells, completed by thirteen different operators, within the Permian and MidCon basins were evaluated. All wells were completed using multiple proppant mesh sizes. A total of 375 flowback samples were collected during the drillout and production phases. The samples were sieved, and the results were fed into an in-house material balance model to determine the percentages of different mesh sizes in the flowback samples. The conclusions were used as guidelines for a new placement approach implemented in multiple new wells to control proppant flowback. The flowback samples ranged from predominantly lead proppant to a similar proportion of the pumped mesh sizes. Not one of the 35 wells had flowback samples containing the majority tail-in mesh size. This supports the early sand dune assumption, suggesting that the early proppant forms dunes near the wellbore and late sand settles over the existing proppant beds. The use of late RCS appears to have a minimal effect on preventing flowback of the early proppant within a stage utilizing slickwater fracturing. Therefore, RCS efficiency to control proppant flowback with the tail-in method is reduced when used in such slickwater stimulations. To seal the different proppant beds, the new approach recommends pumping multiple RCS steps within a stage. The first RCS step is recommended within the first 10–20%, the second sequence within the first 40–60% of proppant volume, and the third as a tail-in. The exact percentages and step design were based on the results of flowback samples from neighboring wells. The implementation of this approach in more than 30 wells resulted in superior flowback control compared to offset control wells. In all trials, the proppant flowback completely stopped within 1 to 7 days of starting production. In this paper, we discuss the drawbacks of the current RCS placement practice while suggesting a new practical approach supported by data. RCS tail-in showed successful flowback control with viscous fracturing fluids and hybrid systems. For slickwater systems, an optimized placement design for RCS throughout the pump schedule provided enhanced flowback control compared to RCS tail-in. Finally, we illustrate the results of field trials in which utilizing the new RCS placement approach successfully reduced flowback.

Developing paediatric skills and knowledge in pharmacy education: an exploration of a novel work-based learning experience

Abstract Introduction Pharmacy education in the United Kingdom must adapt to produce independent prescribing pharmacists ready to join an evolving healthcare system. Current placement practices exclude approximately 21% of the population due to a lack of specific recommendations surrounding paediatric experience and knowledge within the MPharm programme.[1] In turn, students’ current experiences may be limited by lack of interaction with unique learning outcomes offered by some healthcare settings, such as paediatric hospitals.[2] To promote student exposure in an overlooked speciality, novel approaches to work-based learning can be utilised. Aim This study aimed to explore pharmacy students’ experiences of work-based learning in a paediatric hospital setting. Methods In October 2022, fourth-year MPharm students at one school of pharmacy were invited to undertake work-based learning sessions across one academic year. The sessions aimed to develop students’ paediatric consultations skills and knowledge. Sessions consisted of a briefing, ward activities, scaffolded consultations with children and carers, and debriefs with a clinical supervisor. Debriefs included students reporting clinical information, required action and learning outcomes. All debriefs provided by students were transcribed by a clinical supervisor using a spreadsheet which recorded the date, ward visited, patient details, student handover, follow-up (if required) and learning outcomes. Data was initially cleaned, quality checked, and underwent content analysis to identify patterns and key themes to describe student experiences. Results Seventy-four students took part in sessions and delivered 233 consultations covering the medical history of the patient (76%, n=177), with varied levels of completeness. Students were exposed to acute conditions (41%, n=96) and chronic conditions (33%, n=76), with 13% (n=30) still awaiting diagnosis. Forty-eight percent (n=81) of learning points related to the pathology, diagnosis and symptoms of conditions, 24% (n=41) to medicines, 15% (n=25) to patient care, 11% (n=18) to non-clinical experiences and 2% (n=4) to other outcomes. In addition to carrying out ward activities, students underwent the processing of experiences during post-session debriefs: “It’s uncomfortable seeing a child struggle to breathe” [P131]. The process of active reflection was also evidenced in debriefs: “I felt very anxious, like a tightness in the chest, to hear that a child had a short life expectancy” [P145]; “I realised they had zero cultural competence after seeing a patient from the Middle East with jaundice” [P233]. Conclusion The study demonstrates a proof of concept that students can be exposed to complex care needs and challenging consultations under indirect supervision, demonstrating the paediatric setting to be a suitable work-based learning host. However, findings are limited to a single cohort of students at a single site, meaning transferability may be limited. Future studies could focus on longitudinal educational and emotional outcomes of students by measuring clinical knowledge, competence and confidence. Utilising post-session debriefs with peers and supervisors created a space to share both pharmaceutical and emotional learning points, aiding in managing the cognitive load of students. This experience not only highlights the requirement of paediatric exposure in pharmacy education programmes to aid the students’ future practice, but the importance of supervised reflective activities following work-based learning experiences.

PLACEMENT PREDICTION SYSTEM USING MACHINE LEARNING

Engineering students are not sure what they want to study after graduation. Students are confused by the many options offered by universities such as postgraduate admissions, and factors such as salaries and different jobs worsen the situation. There is no reliable platform that allows students to predict outcomes from the beginning of engineering and take action to bridge the gap and create a better future. Students studying in engineering faculties need to know where they stand compared to others and what kind of placement they will get. Training and workshops are available when students enter their final year, but these are not useful for students to plan their future studies. Student placement is one of the most important goals of the school. Schools work hard to accommodate students. The aim is to predict the current year's student placement by analyzing the data students have collected from previous years. Prediction of student performance is an important part of the study because today all student development is directly related to the student's success in tests and activities. Therefore, there are many situations where it is necessary to predict student performance, for example, identifying students who are not performing well and taking steps to improve them. There is no platform for girls to review their current work and highlight their strengths. . Currently, there are platforms that are not trained on real and complete data and cannot learn from error prediction, which reduces accuracy in the long run. Our goal is to create one. To ensure the results are acceptable, the model will be trained on real data and a large number of positive and negative results will be obtained. The model proposes an algorithm to estimate the model. Information is collected by the school where the prediction will be made, using the necessary information before the process or by examining the historical data of the previous year's students, and the placement of the current students is predicted and helps to improve the placement percentage of the students. institute. Keywords: task planning, task prediction, data decision making, machine learning algorithms, prediction prediction, student prediction, good study, student learning results, pre-process data, learning results.

Real-time in-situ process monitoring method based on the self-conductivity of carbon fiber prepreg for automated fiber placement (AFP)

Real-time online monitoring is of great significance for the manufacturing of carbon fiber reinforced composites, contributing to improving and ensuring the quality of the final manufactured part. An in-situ real-time process monitoring method based on the conductivity of continuous carbon fiber reinforced thermoplastic matrix prepreg was proposed for automated fiber placement (AFP). The detection capability of several different defects was investigated, including foreign object debris, tape breakage, weak edge bonding, gaps/overlaps, and even debonding. In addition, the influence of placement speed and laser power on the detection capacity was also discussed. The number, position, length, and width of various interlayer defects were detected through the resistance change between the current placement layer and the laid layers. Furthermore, accurate detection of defects in different layers was also achieved, indicating the detection capability of existing defects. This method of timely defect detection during the manufacturing process allows for an early manual intervention to improve the quality of manufactured structures and the intelligence of AFP technology.

Potential use of poultry farms by wild waterfowl in California's Central Valley varies across space, times of day, and species: implications for influenza transmission risk

Interactions between wildlife and livestock can lead to cross‐species disease transmission, which incurs economic costs and threatens wildlife conservation. Wild waterfowl are natural hosts of avian influenza viruses (AIVs), are often abundant near poultry farms, and have been linked to outbreaks of AIVs in poultry. Interspecific and seasonal variation in waterfowl movement and habitat use means that the risk of disease transmission between wild birds and poultry inevitably varies across species, space, and time. Here, we used GPS telemetry data from 10 waterfowl species in and near California's Central Valley, a region where both wild waterfowl and domestic poultry are abundant, to study selection of poultry farms by waterfowl across diel, seasonal, and annual cycles. We found that waterfowl selected for wetlands, open water, protected areas, and croplands, which meant that they generally avoided habitats that were likely to be used for poultry farming. These selection patterns were linked to species' ecology and diel behavioral patterns, such that avoidance of poultry habitats was stronger for local or partial migrants than for long‐distance migrants, and stronger during daytime than at night. We then combined these habitat selection results with data on poultry farm locations to map risk of waterfowl–poultry contact across the Central Valley. Average selection strength at poultry farms was low, suggesting that current placement of poultry farms is generally effective for limiting risk of contact with wild birds. When we combined these habitat selection results with data on species' abundances and AIV infection prevalence, we found dramatic variation in potential AIV transmission risk among species. These results could be used to prioritize surveillance and biosecurity efforts for regions and times of relatively high risk. More generally, these results highlight that fine‐scale movement data can help identify interspecific, seasonal, and diel patterns in animal behaviors that affect wildlife and poultry health.

Ten-Year Outcomes: Community Health Center/Academic Medicine Partnership for Rural Family Medicine Training.

The widening gap between urban and rural health outcomes is exacerbated by physician shortages that disproportionately affect rural communities. Rural residencies are an effective mechanism to increase physician placement in rural and medically underserved areas yet are limited in number due to funding. Community health center/academic medicine partnerships (CHAMPs) can serve as a collaborative framework for expansion of academic primary care residencies outside of traditional funding models. This report describes 10-year outcomes of a rural training pathway developed as part of a CHAMP collaboration. Using data from internal registries and public sources, our retrospective study examined demographic and postgraduation practice characteristics for rural pathway graduates. We identified the rates of postgraduation placement in rural (Federal Office of Rural Health Policy grant-eligible) and federally designated Medically Underserved Areas/Populations (MUA/Ps). We assessed current placement for graduates &gt;3 years from program completion. Over a 10-year period, 25 trainees graduated from the two residency expansion sites. Immediately postgraduation, 84% (21) were in primary care Health Professional Shortage Areas (HPSAs), 80% (20) in MUA/Ps, and 60% (15) in rural locations. Sixteen graduates were &gt;3 years from program completion, including 69% (11) in primary care HPSAs, 69% (11) in MUA/Ps, and 50% (5) in rural locations. This CHAMP collaboration supported development of a rural pathway that embedded family medicine residents in community health centers and effectively increased placement in rural and MUA/Ps. This report adds to national research on rural workforce development, highlighting the role of academic-community partnerships in expanding rural residency training outside of traditional funding models.

A lucky draw? Theorising how work placements develop diverse university students’ career stories

ABSTRACT Universities can prepare students for work, and universities can educate increasingly diverse student cohorts, but can they do both concurrently? This question of whether universities can offer equitable and inclusive careers education is increasingly under scrutiny. In this study, we address the largely under-theorised area of work-based placements from the perspective of career identity formation for diverse students. We do so through the adoption of Meijers and Lengelle’s theorisation of ‘career stories’ which position the narrative as the mechanism to understand how students’ have developed their career identities and future professional goals. Drawing on longitudinal interviews with disabled students, we explore university placements as ‘boundary experiences’ which can either enable, or disable, the formation of students’ professional selves. Our findings indicate a troubling amount of variability, and indeed, luck within the placement offering, often unsupported by intentional pedagogical design. This suggests that the current university placement experience does little to support the professional identity formation processes of diverse students. Through this study, we further translate a processual learning theory from career learning to support future intentional pedagogical placement design in the university context for diverse students. The article ends with a consideration of how placement experiences can better align to equity goals of the university, and provide scalable, high-quality learning experiences for all students.

A Control Circuit Small Wind Turbines with Low Harmonic Distortion and Improved Power Factor

This paper presents the application of average current mode control to reduce the THDi and increase the PF in a Three-Phase Boost Rectifier driving a small wind turbine. It is used as input stage of small wind turbines with permanent magnet synchronous generators operating at variable speed. The Boost Rectifier´s output is connected to an inverter which feeds the energy to a distribution power grid. The operation in discontinuous conduction mode allows significantly reducing the Total Harmonic Distortion of the current in the small wind turbine. However, it is necessary to add an input filter so that the switching ripple doesn´t arrive to the small wind turbine. It is evaluated the convenience of the current sensors placement in the DC side of the rectifier or at the output of the generator. The results demonstrate that it is better to place the sensors in the output of the generator, because it is achieved smaller THDi and higher PF.

Critical Analysis of Hominidae (Great Ape) Taxonomy

This article is a critical look at the current taxonomic placement of the different species that make up Hominidae (the great ape family) to determine if any biases might be occurring in how humans are described relative to the other great apes and how taxonomic placements are understood across different disciplines. A systematic literature review was conducted to quantify the placement of the human node on the phylogenetic trees that were observed. The qualitative data includes a literature review of the philosophical/religious and linguistic perspectives and noting when the colloquial and scientific terms were used and in what context. Three taxonomic placements were presented in this thesis: the currently accepted Hominidae family, 2) the separated Hominidae-Pongidea families, and 3) an updated taxonomic placement that result from the findings in this research. The data from the quantitative and qualitative analyses were observed and the use of language were used to determine that there is a bias when researchers illustrate the taxonomic relationship of humans and other great apes. The main findings were humans, chimpanzees, bonobos, and gorillas all belong to genus Homo, and failure to group all these organisms in a single genus produces a bias within the research and leads to paraphyletic groupings where humans are perceived as separate from other great apes. This bias reinforces institutional pithecophobia in Western society that perpetuate the belief that humans are separate from other apes.

Revisiting the systematic position of the enigmatic Nicobar Bulbul (Ixos nicobariensis)

The Nicobar Bulbul Ixos nicobariensis is an endemic species found across the central Nicobar Islands whose systematic position has been debated for many decades. Its current placement in the genus Ixos is tentative and is based on morphological similarities and geographical affinities to other members of the genus. We used mitochondrial and nuclear markers to examine its phylogenetic relationship to other members of Ixos and Hypsipetes. Our results indicate that the Nicobar Bulbul is sister to members of the genus Hypsipetes, and not Ixos. We further discuss the origin of this species based on the results of our study.