Optimal Guidance Laws for Aircraft and Drones along Specified Flight Paths in the Presence of Wind

In this paper the methodology presented earlier, based on the open loop control approach for real time optimal trajectory synthesis for an unmanned aerial vehicle in UAM applications, is extended to trajectory tracking and feedback control. The reference trajectory was synthesized earlier using the kinematic relations the vehicle must satisfy and a disturbance free ideal point mass model in flight. The feedback control laws, synthesized in this paper, seek to track the reference trajectory, in real time. Although the tracking control laws are based on either linear optimal control or Lyapunov's second method, they are used to control the nonlinear dynamics of the vehicle, with disturbances, in real time. Since it is assumed that the dynamics associated with the horizontal and vertical translation are relative fast, the controls associated with pitch attitude can be independently designed, without altering the altitude (but definitely altering the speed) to maintain the pitch attitude and pitch stability. The additional feedback required for controlling the slower pitch attitude dynamics is obtained and the closed loop pitch attitude stability is also demonstrated with an example. Typical examples demonstrate the application of the method, the aircraft trajectory response and stability

‘Is it me, or is it getting crazier out there?’: The psyche of the interior in Joker: An analysis of psychological space in Todd Phillips Joker (2019) through collage

Encounters with interior spaces are influenced by past experiences and state of mind. Much of how architecture is experienced therefore is not readily apparent and is sensed rather than seen. Psyche impacts this experience of lived space, from an individual’s awareness of themselves within it, to the perception of space itself. Film offers a distinctive representation of this subjective experience through its narrative form and command of visual, audio and temporal language. The emotive and visceral power of film render it an accessible and immersive medium, and as such make it uniquely placed to communicate less tangible qualities of space and character. This paper analyses the use of interior space in the film Joker (Todd Phillips, 2019). The acutely intimate discernment of the protagonist’s interior environment is the result of environmental and psychological disruption, where boundaries break down between the real and imaginary, and the surreal intrudes upon the tangible depiction of the interior. The exposition of the character’s damaged psyche within space is analysed at key points within the narrative, using collage as an exploratory, visual methodology to analyse and experiment with, to potentially reveal the less perceivable, yet invasive intangible layers of lived space. This article addresses the frequent oversight of psychological qualities of the interior in architectural discourse, through an analytical and experimental method rendering the psychological content of space visible. Defining this intangible nature of architecture as the psychosphere (or the psychological atmosphere), I term this technique the ‘psychospheric collage method’. The process consists of interrogating expressive film language and content through an architectural lens documented through sketching, storyboarding and textual enquiry. From these fragmented components I compose a new visual language capable of signifying the layered psychological atmosphere in which a character resides, thus facilitating its consideration within architectural design and enabling articulation of our intimate encounter with the interior

Potential conservation of circadian clock proteins in the phylum Nematoda as revealed by bioinformatic searches

Although several circadian rhythms have been described in C. elegans, its molecular clock remains elusive. In this work we employed a novel bioinformatic approach, applying probabilistic methodologies, to search for circadian clock proteins of several of the best studied circadian model organisms of different taxa (Mus musculus, Drosophila melanogaster, Neurospora crassa, Arabidopsis thaliana and Synechoccocus elongatus) in the proteomes of C. elegans and other members of the phylum Nematoda. With this approach we found that the Nematoda contain proteins most related to the core and accessory proteins of the insect and mammalian clocks, which provide new insights into the nematode clock and the evolution of the circadian system.Fil: Romanowski, Andrés. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Instituto de Investigaciones Bioquímicas de Buenos Aires. Fundación Instituto Leloir. Instituto de Investigaciones Bioquímicas de Buenos Aires; Argentina. Universidad Nacional de Quilmes. Departamento de Ciencia y Tecnología. Laboratorio de Cronobiología; ArgentinaFil: Garavaglia, Matías Javier. Universidad Nacional de Quilmes. Departamento de Ciencia y Tecnología. Laboratorio de Ing.genética y Biolog.molecular y Celular. Area Virus de Insectos; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Goya, María Eugenia. Universidad Nacional de Quilmes. Departamento de Ciencia y Tecnología. Laboratorio de Cronobiología; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Ghiringhelli, Pablo Daniel. Universidad Nacional de Quilmes. Departamento de Ciencia y Tecnología. Laboratorio de Ing.genética y Biolog.molecular y Celular. Area Virus de Insectos; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Golombek, Diego Andres. Universidad Nacional de Quilmes. Departamento de Ciencia y Tecnología. Laboratorio de Cronobiología; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentin

The Influence Of Socıo-Demographıc Factors On Organizational Alienation Of Accommodation Businesses Employees

In this study, the concept of alienation is analyzed in terms of organizational behavior discipline frame. As part of organizational behavior discipline, alienation is expressed as the server’s losing control over the product he produces or the service or inability of self-expression in business life. Basically, the concept of alienation is used to express alienation from the institution, occupation his own being, his valves, and society; in one sense it means a breakdown in all relations. The science of statistics plays an important role to identify the variable or variables effect the event in scientific studies and to determine their grades. Analysis of CHAID firms sub-sets by grouping the factors affecting the dependent variable in view of their importance level. In this term, the purpose of the research is to form to identify the employees’ organizational alienation level; demographic variables combined categories and sub-sets, working in accommodation services by using CHAID analysis technique

Machine Learning-Driven Conservative-to-Primitive Conversion in Hybrid Piecewise Polytropic and Tabulated Equations of State

We present a novel machine learning (ML)-based method to accelerate conservative-to-primitive inversion, focusing on hybrid piecewise polytropic and tabulated equations of state. Traditional root-finding techniques are computationally expensive, particularly for large-scale relativistic hydrodynamics simulations. To address this, we employ feedforward neural networks (NNC2PS and NNC2PL), trained in PyTorch (2.0+) and optimized for GPU inference using NVIDIA TensorRT (8.4.1), achieving significant speedups with minimal accuracy loss. The NNC2PS model achieves 1 and ∞ errors of 4.54×10−7 and 3.44×10−6, respectively, while the NNC2PL model exhibits even lower error values. TensorRT optimization with mixed-precision deployment substantially accelerates performance compared to traditional root-finding methods. Specifically, the mixed-precision TensorRT engine for NNC2PS achieves inference speeds approximately 400 times faster than a traditional single-threaded CPU implementation for a dataset size of 1,000,000 points. Ideal parallelization across an entire compute node in the Delta supercomputer (dual AMD 64-core 2.45 GHz Milan processors and 8 NVIDIA A100 GPUs with 40 GB HBM2 RAM and NVLink) predicts a 25-fold speedup for TensorRT over an optimally parallelized numerical method when processing 8 million data points. Moreover, the ML method exhibits sub-linear scaling with increasing dataset sizes. We release the scientific software developed, enabling further validation and extension of our findings. By exploiting the underlying symmetries within the equation of state, these findings highlight the potential of ML, combined with GPU optimization and model quantization, to accelerate conservative-to-primitive inversion in relativistic hydrodynamics simulations

Peer Observation of Teaching in E-learning environments in UK Universities

Peer observation of teaching (POT) is presented as a valuable mechanism allowing for the dissemination of best practice within university teaching. With the rapid rise of online learning courses, it could be expected that POT would be extended to the online environment. In practice, however, it appears that this development is inconsistent. Likewise, there has been little research into the experiences of teachers of online teaching, with research focused more on the technological aspects than on the delivery of teaching. Using a document analysis of a sample of UK universities and interviews with academics to assess a cross section of current institutional practice, this paper explores the intersection between POT and the online delivery of teaching and learning. The findings indicate that POT has not yet become a standard evaluative and/or developmental process in e-learning environments, although some universities do implement it within their CPD or teacher training programmes

Comparison of spinal anaesthesia versus ilioinguinal-iliohypogastric nerve block applied with tumescent anaesthesia for single-sided inguinal hernia

Background & aims Primary aim of this study is to determine whether the use of local anaesthesia performed with IINB and IHNB against spinal anaesthesia in inguinal hernia repair is accepted as an alternative medicine. Methods 75 cases in the class of American Society of Anesthesia physical status (ASA) I-III between the ages of 18 and 75 diagnosed with single-sided inguinal hernia and hospitalized for surgery in general surgery clinic were prospectively and randomly included in this study. Results There was statistically significant difference between the groups (30.14 +/- 8.2 and 35.51 +/- 9.39) in terms of the duration of the surgery. The duration was shorter in Group 1 (p < 0.001). There was statistically significant difference between the groups in terms of the duration of the first mobilization. It was significantly shorter in Group 2 than in Group 1 (5.71 +/- 1.7 and 2.70 +/- 1.53 min) (p < 0.001). Mean duration of length of hospital stay criteria was significantly shorter in Group 2 than in Group 1 (26.00 +/- 6.43 and 14.23 +/- 5.40 h) (p < 0.001). Throughout the follow-up period in postoperative 24 h, the number of patients who needed analgesia was significantly higher in Group 1 than in Group 2 (91.4% and 45.7%) There was statistically significant difference between the groups in terms of patient satisfaction and urinary retention development (p < 0.005). Hematoma development or postoperative bleeding was not observed in either group. The time of sensory block onset was significantly higher in Group 2 than in Group 1 (9.66 +/- 1.41 and 9.03 +/- 0.98 min) (p < 0.005) Conclusion The results of our study show that IINB and IHNB applied with local anaesthesia are superior to spinal anaesthesia in unilateral inguinal hernia repairs

Correlation of internal jugular vein, common carotid artery, femoral artery and femoral vein diameters with central venous pressure

Background: This study aimed to detect the correlation of central venous pressure (CVP) with the internal jugular vein (IJV), common carotid artery (CCA), femoral vein (FV), and femoral artery (FA) diameters measured with ultrasound (USG) in patients under mechanical ventilation to evaluate whether they are suitable to be used as an alternative low-cost and noninvasive method for the detection of CVP. Methods: A total of 40 patients aged from 18 to 90 who had been receiving therapy in the intensive care unit (ICU) were included in the study. Central venous catheter was placed into the patients through right IJV or subclavian vein in their first 24-hour of hospitalization and the right atrium pressure (RAP) was measured from the catheter, the tip of which was confirmed to reach right atrium. In the same session, CCA, IJV, FA, and FV diameters were measured with USG and their correlations with CVP were calculated. In addition, correlations of the measured venous and artery diameters between each other were detected as well. Results: There was a significantly high correlation between CVP and CCA diameter (R = 0.603, P < .000). There was a significantly low correlation between CVP and IJV diameter (R = 0.352, P = .026), a significantly low correlation between FA and FV diameters (R = 0.317, P = .047), a significantly low correlation between FA and CCA diameters (R = 0.330, P = .038), and a significantly low correlation between IJV and CCA diameters (R = 0.364, P = .020). Conclusion: CVP and CCA diameters exhibited a high correlation. For detection of CVP, the ultrasonographic CCA diameter measurement can be used as an alternative noninvasive method which is easy to use and minimally affected by measurement errors of individuals and which has low learning curve compared with the other measurement methods