bluuebunny/crossref_metadata_2025 huggingface dataset:
Modal Reduction of Fatigue Sensitive Components for Comprehensive Rotorcraft Dynamics Simulation
Authors:   University of Maryland, Sonneville Valentin , Sinotte Tyler , Bauchau Olivier
Published: August 2024

Rotorcrafts often involve fatigue sensitive components that present complex three dimensional geometries and undergo small deformations, such as a fuselage, a swashplate and pitch link rods. For those components, two questions must be answered: (1) what is the impact of the flexibility of the component on the dynamic response of the overall system and (2) what is the three-dimensional stress field in such component? The prediction of the three-dimensional stress fields in these complex components and the assessment of their fatigue life require the use of three-dimensional finite element models of the components. Nevertheless, the fine mesh sizes often necessary to capture complex geometries and intricate material property distributions result in a set of algebraic equations that is prohibitively large for direct dynamics simulation. In addition, geometric complexity does not imply a complex dynamic response of the structure, which can often be captured accurately by a small number modes whereas fine mesh sizes result in the appearance of spurious, high-frequency modes that are of little physical relevance.
Engineering challenge - Start of S-70i BLACK HAWK International Production at PZL Mielec, a Sikorsky Company Poland
Authors:   Polskie Zakłady Lotnicze, Gałaczyński Tomasz
Published: August 2024

The paper presents quantitively the range of challenges that attend the S-70i Black Hawk start production - from prototype building to serial production. This article focuses not only on engineering tasks however partially also describes challenges connected to the following areas: business, quality, logistic, manufacturing planning and organization, ground and flight testing, pilots and mechanics training and jobs, PR activity. The volume of presented information are regulated and limited by the ITC regulations and IP protections.
Machining Cold Spray Additive Manufacture for the UH-60 Main Transmission Sump
Authors:   US Army, Cass Wesley
Published: August 2024

A new additive manufacturing (AM) process, high pressure cold spray, has shown to provide structural integrity along with improved machining characteristics compared to existing thermal spray processes. The U.S. Army overhauls the UH-60 Black Hawk helicopter components including the transmission and gearboxes. When performing the overhaul of the transmission assembly, corrosion has been found on the transmission housings. The cold spray AM process was used to repair corrosion to an existing sump housing. Using inspection, stress analysis, and testing, the cold spray AM was qualified from an airworthiness perspective as a replacement to thermal (flame) spray processes. Re-establishing blueprint tolerances on an existing operational sump housing required employing techniques not used at initial manufacture and gave improvements on the setup and final surface finish. The cold spray repair was found to be cost effective. This repair can be employed on other similar magnesium alloy housings and aluminum alloy housings.
Characterization of Fabrication Induced Defects and Assessment of Their Effects on Integrity of Composite Structures
Authors:   Global Engineering and Materials Inc., Lua Jim ,   Wichita State University, Seneviratne Waruna ,   Naval Air Warfare Center (PAX), Phan Nam , Pham Dinh , Sadeghirad Alireza , Karuppiah Anand , Cui Xiaodong
Published: August 2024

Voids and ply waviness are the most common types of fabrication process induced defects in composite structures that can have detrimental effects on their load bearing capacity. To date, extensive works have been done on the characterization of fabrication induced defects on the mechanical properties of composites but less study has been performed to determine the effects of defects on the failure progression. Given the durability and damage tolerance requirements for certification and design of composite structures, it is important to evaluate the effects of these defects on the damage initiation and failure progression of a loaded composite structure. In this study, void and ply waviness information are extracted from X-ray computed tomography (CT) and optical microscopy and an efficient image-to-numerical solution is developed to map the detected voids and ply waviness into a finite element based progressive failure analysis model. An interlaminar tensile (ILT) test specimen under four point bending is used to demonstrate the capability of our response and progressive damage prediction.
Preliminary Progress in Establishing Motion Fidelity Requirements for Maritime Rotorcraft Flight Simulators
Authors:   University of Liverpool, Memon Wajih ,   Kopter Group AG, Robinson Sophie , White Mark , Owen Ieuan
Published: August 2024

The research presented in this paper is part of a project underway at the University of Liverpool (UoL) which aims to develop overall simulation fidelity requirements for maritime rotorcraft flight simulators. This requires a structured examination of individual Modelling and Simulation (M&S) elements, such as motion and visual cues, flight dynamics model and ship airwake integration. The paper reports the initial results of motion cueing research that has been conducted to assess and optimise the motion drive laws and determine high fidelity motion cueing for simulated shipboard operations. To do this, an objective technique, Vestibular Motion Perception Error (VMPE), has been developed. The technique was utilised to optimise the motion cues in UoL's Heliflight-R simulator for a simulated helicopter landing on an aircraft carrier in a turbulent environment. Four motion tuning sets were derived offline and experimentally tested. Results show the influence of different motion cues and airwake conditions on the pilot's overall self-motion perception, control strategy and task performance. It was found that high-fidelity motion cueing becomes more desirable for the pilot at higher airwake wind conditions, for which an 'Optimised' motion setting was obtained using the new technique, than at lower airwake turbulence conditions.
Gear and Bearing Tribology Contact Simulation for Advanced Propulsion and Drive Systems
Authors:   Wedeven Associates Inc., Wedeven Lavern ,   US Army - Aviation Development Directorate, Fetty Jason , Kratz Steve , Wedeven Graham , Homan Robert , Kratz Douglas
Published: August 2024

The development of a Wedeven Associates Machine (WAMmp) for micro-pitting utilizes an advanced gearbox design and other support components to apply high loads and precision surface velocities while measuring traction under incipient sliding conditions. It is intended to evaluate oil and material pairs for specific performance characteristics related to high cycle fatigue and micropitting. Testing and modeling from WAMmp data creates the opportunity to predict the performance of bearing/gear materials, surface processing, and lubricants during the component design phase. Wedeven Associates, Inc. (WAI) has developed surface finishing processes to axially hone test articles to represent gear tooth finishing. The development of this method provides a meaningful tool for evaluation of new technologies and for predictive modeling for advanced gearbox and drive system designs.
Variable Speed Turbine Technology Development and Demonstration
Authors:   NASA Glenn Research Center, Suder Kenneth ,   US Army Aviation and Missile Research Development Command (AMRDEC), Durbin Kenneth ,   Vantage Partners LLC, Giel Paul ,   US Army Research Laboratory, Thurman Douglas ,   Ohio State University, Ameri Ali , Poinsatte Phil
Published: August 2024

The objective of this technical report is to provide a summary of the research performed under the NASA Revolutionary Vertical Lift (RVLT) Project to develop and demonstrate required engine technologies and designs for achieving a 50% reduction in rotor rotational speed via engine speed changes alone with a fixed ratio drive system while maintaining high engine efficiency over the wide operational speed range. This research culminated in a joint effort between the ARMY and NASA to develop and demonstrate a Variable Speed Power Turbine (VSPT) with an efficiency of 1) 92% or better at the Maximum Rated Power (MRP) condition corresponding to operation at sea-level conditions to hover at 100% rotational speed and 2) Efficiency of 90% or better at the Maximum Continuous Power (MCP) corresponding to cruise at 25000ft at Mach 0.5 at 55% rotational speed.
NASA VSPT blade cascade testing at high and low inlet turbulence levels over a large range of Mach numbers, Reynolds numbers, and incidence provided a benchmark data base to validate the ability of CFD analysis codes to predict the VSPT losses over the entire flight operating envelope. These test results were also used to validate the ability of models to predict flow separation and laminar-to-turbulent flow transition. To demonstrate the VSPT technology, a notional engine was developed and the power turbine was designed to meet the NASA/Army performance requirements under the Army's Advanced Variable Speed Power Turbine (AVSPOT) program. Based on the notional engine a VSPT component test rig was designed, fabricated, and tested to demonstrate that their design would meet the performance requirements. The tested VSPT exceeded the efficiency goals of the design. Furthermore, the lapse between the MCP and MRP conditions was closely matched by CFD predictions, providing confidence in using these predictive tools in future applications. The technology development work completed on this contract is expected to transition to a viable engine demonstration in the future.
High Temperature Ceramic Matrix Composite Materials Research for Next Generation Army Propulsion System
Authors:   U.S. Army Research Laboratory, Ghoshal Anindya ,   Oak Ridge Institute for Science and Education, Mock Clara , Murugan Muthuvel , Nieto Andy , Walock Michael , Bravo Luis , Pepi Marc , Swab Jeffrey , Hirsch Samuel , Dowding Robert
Published: August 2024

Aviation propulsion system structures are subjected to challenging conditions such as extremely high velocities, ultra-high/low temperatures, and excessive dust/sand/smoke/volcanic ash conditions during military operations. Therefore, the research and development of high-performance engine materials with superior characteristics such as great mechanical strength, high fatigue resistance and creep resistance, good tolerance to wide temperature variations, and excellent resistance to corrosion and oxidation is essential to the evolution of highly robust and efficient propulsion systems without a compromise on capabilities, even in hostile environments. The goal of this collaborative program within United States Army Research Laboratory (ARL) is to establish a generalized fundamental physics-based approach and probabilistic-based lifing method to extrapolate thermal loading performance and material characterization results from high performance high temperature ceramic materials such as ceramic matrix composites (CMC) based flat specimens and engine component representative specimens. High temperature structural integrity and durability and probabilistic-based lifing assessment will be evaluated both analytically and experimentally under thermal shock, thermal cycling, and combined thermo-mechanical loadings. This paper presents the ARL CMC propulsion materials strategy in each of the identified thrust areas and present some results from some of the ongoing research at ARL and its research partners.
Robust Autonomous Landing of a Quadrotor on a Moving Target
Authors:   Texas A&M University, Gautam Alvika ,   IIIT-Delhi, Sujit P.B. ,   IISC Bangalore, Ratnoo Ashwini , Saripalli IIIT-Delhi;
Published: August 2024

Autonomous landing is the most difficult maneuver in a quadrotor mission because of challenges like (i) external disturbances and localization error both of which cause deviation from the desired trajectory and may result in a crash. In this paper, we use onboard vision to detect and estimate the landing target parameters accurately. We present a guidance framework to land on a moving target accurately. We discuss the advantages and present the simulation results for a simple 2D scenario for the proposed framework. We present implementation of the proposed algorithm for a quadrotor vehicle simulated in Microsoft Airsim using unreal engine as base and discuss various cases to evaluate robustness of the landing algorithm in presence of disturbances.
Initial Steps Towards Quadcopter-based Brick Placement for Construction
Authors:   The Pennsylvania State University, Hagaribommanahalli Sachin , Wagner Alan
Published: August 2024

We propose the possibility of using an autonomous quadcopter in a construction setting to build meaningful structures. In this paper we demonstrate these ideas using a quadcopter tasked with carrying bricks to locations specified by a notional blueprint. In our demonstrations, the quadcopter carries a foam brick to a predetermined position and places it with respect to the other bricks to create a 2-dimensional structure as specified by the blueprint. Computer vision techniques are used to verify brick positions and motion capture is used to localize the quadcopter. A custom-built 3D printed pick up/drop mechanism is used to carry the brick from the initial point to the final point. We demonstrated that a variety of structures can be created autonomously in practice using a quadcopter. We measure performance in terms of positional correctness of the structure as measured by the lateral placement error and orientation angle error. This paper discusses the theoretical approach to path generation and control systems, computer vision algorithms, blueprint algorithms, and the pick-up and drop mechanism.
Modeling and Simulation of sUAS Impact Characteristics Following In-Flight Failures
Authors:   The University of Alabama, Goli Nishanth , Arterburn David , Duling Chris , Sallis Chris
Published: August 2024

The injury potential to a human from a descending small Unmanned Aerial System (sUAS) following an in-flight failure has a large impact on how the FAA chooses to regulate sUAS flight over people. The impact characteristics of any sUAS post in-flight failure must be known before operating over people to determine how much impact energy the vehicle may introduce during the collision. This paper focuses on Modeling and Simulation of sUAS post in-flight failure to estimate its impact characteristics. Quadrotor models of three commercial UAVs are developed. Their post failure trajectories are simulated and validated from flight tests conducted at University of Alabama in Huntsville. Monte Carlo Simulation are also performed to estimate the worst-case impact for each vehicle and identify the effects of UAV flight altitude, velocity at the instant of failure, vehicle attitude, failure types and wind conditions on the UAV impact energy, impact orientation and horizontal displacement. Results from modeling agree very closely with flight tests. Modeling and Simulation results highlight the maximum velocities reached, impact angles, tumbling behavior of UAVs, and the effect of size, shape and mass of the UAV.
Interrogating the epistemic dimension for new beginnings in early childhood care and education
Authors: Ebrahim Hasina B.
Published: August 2024

Background: Currently, the globe is at the crossroads of a polycrisis where multiple shocks and interdependencies play out in an ever-evolving integrated world. Young children and their families bear the brunt of these realities through stresses that have a negative impact on them. In seeking better worlds in early childhood care and education (ECCE), it is imperative that universalised quick-fix solutions that sideline multiple perspectives and multivocality do not become the norm.Aim: This conceptual article aims to interrogate the epistemic dimension in ECCE by analysing resistance to dominant framings and possibilities for new beginnings.Methods: Specific concepts from decolonial literature are unpacked and operationalised through a collective case study. Cases were purposively selected for their pushback elements from literature and the author’s experiences. The cases from the United States of America, Africa and South Africa were analysed for patterns of resistance and possibilities.Results: The findings reveal that the resistance efforts from different geographical regions emanate from intentional actions to contest dominant perspectives in ECCE, and to reorient the epistemological space with affirming alternatives. As a collective, the case studies can be read as relational experiences that resist elimination and assimilation into universalised framings of ECCE.Conclusion: The focus on the epistemic dimension from different geographical spaces, and more importantly from similar relational experiences, points to the importance of expanding a network of solidarity for a more inclusive ECCE science.Contribution: This study contributes to filling the gap in knowledge in ECCE through a focus on how the epistemic dimension has the potential to be skewed in the current polycrisis unless concerted action is undertaken to develop polycentres that include multiple ways of knowing, thinking and feeling in ECCE.
The Relative Impact of Clinical and Investigational Factors to Predict the Outcome in Stroke Patients
Authors: Shahid Rizwana , Zafar Azra , Nazish Saima , Shariff Erum , Alshamrani Foziah , Aljaafari Danah , Soltan Nehad Mahmoud , Alkhamis Fahad A , Albakr Aishah Ibrahim , Alabdali Majed , Saqqur Maher
Published: August 2024

Objective:

As stroke is still considered a significant cause of mortality and morbidity, it is crucial to find the factors affecting the outcome in these patients. We aimed to interpret the various clinical and investigational parameters and establish their association with the outcome in stroke patients.

Materials and Methods:

This is a retrospective, cross-sectional study, conducted in the Department of Neurology between June 2019 to November 2021. The study involved the review and analysis of medical records pertaining to 264 patients, admitted with the diagnosis of stroke. Various clinical, radiological, and electroencephalographic (EEG) patterns in stroke patients were analyzed and their association with outcome was established. The association between the studied variables was performed by the logistic regression (LR) and presented as odds ratio (OR) and 95% confidence interval (CI).

Results:

The study sample consisted of 264 patients. Males comprised 165 (62.5%) with the mean participant age of 57.17 ± 18.7 3 years (range: 18–94). Patients younger than 50 years had a better likelihood of a good outcome in comparison to patients older than 50. The admission location was the most significant factor in predicting the outcome (P = 0.00) in favor of inpatient department and outpatient department (OPD), in contrast to patients admitted directly to intensive care unit (ICU). Normal EEG was associated with good outcome (P = 0.04; OR, 3.3; CI, 1.01–10.88) even after adjustment of the confounders, whereas patients having marked EEG slowing had a poor outcome (P = 0.05; OR, 2.4; CI, 0.65–8.79). Among the clinical parameters, hemiparesis (P = 0.03), trauma (P = 0.01), generalized tonic-clonic seizures (GTC) (P = 0.00), and National Institutes of Health Stroke Scale of more than 4 were more likely associated with a poor outcome as well as the presence of intracranial hemorrhage (ICH) or infarction in the cortical and cortical/subcortical locations were associated with poor outcomes. After adjustment of confounders, the factors found to have prognostic significance in favor of good outcomes were inpatients or OPD referrals and normal EEG while direct admission to ICU, marked slowing on EEG, and presence of ICH were found to be associated with poor outcome.

Conclusion:

Certain patterns are predictive of good or worse outcomes in stroke patients. Early identification of these factors can lead to early intervention, which in turn might help in a better outcome. The results of the study, therefore, have some prognostic significance.
Hirayama Disease: Neutral and Flexion Magnetic Resonance Imaging Manifestations and Single Tertiary Care Center Analysis on 3T Scanner
Authors: Kaira Pankaj , Kaira Vaanika , Verma Sameer R. , Kumar Sunil
Published: August 2024

Background:

Hirayama disease (HD) is a rare benign type of cervical cord myelopathy occurring commonly in young males as unilateral or bilateral asymmetrical amyotrophy of the hand and forearm muscles in C8–T1 distribution. Magnetic resonance imaging (MRI) is the best technique for the evaluation and imaging of this entity.

Materials and Methods:

This is a retrospective review of cervical magnetic resonance images of patients that were taken for clinically suspected and diagnosed HD on 3T MRI in postcontrast neutral and flexion (30°–40°) positions from July 2019 to January 2024 at Shri Ram Murti Smarak Institute of Medical Sciences, Bareilly.

Results:

Fourteen patients included in the study were males less than 34 years of age. MRI findings of cord atrophy in the lower cervical region/cervico-dorsal junction, abnormal cervical curvature, loss of attachment of the dorsal dural sac and subjacent laminae with anterior displacement, and a prominent intense enhancing posterior epidural space were observed in all 14 patients. The minimum anteroposterior cord diameters in the neutral and flexion positions were 2.9 and 2.8 mm, respectively (mean thickness of laminodural space on flexion – 5.2 mm). Other MRI findings showed variable representations.

Conclusions:

Flexion-position MRI has emerged as the gold standard for establishing and validating the diagnosis of HD in clinically suspected cases and should be an essential part of the protocol for the screening of clinically suspected cases of HD to aid in early treatment and therapeutic intervention. Complimentary newer sequences such as the Three-dimensional (3D)-Constructive interference in Steady State (CISS)/Fast Imaging Employing Steady-state Acquisition Cycled Phases (FIESTA-C) may reinforce better appreciation of epidural flow voids.
Correlation between clinicopathological indices and expression of cluster of differentiation 24 and cluster of differentiation 44 biomarkers in oral epithelial dysplasia and oral squamous cell carcinoma patients: A follow-up study
Authors: Ghazi Narges , Saghravanian Nasrollah , Anvari Kazem , Mirhashemi Majid , Erfanian Mohammadhadi
Published: August 2024

Background:

Oral squamous cell carcinoma (OSCC) is the most common oral cavity cancer and may occur following oral epithelial dysplasia (OED). Cancer stem cells (CSCs) can self-renew and multi-directionally differentiate to promote tumorigenesis with high expression of cluster of differentiation (CD) 24 and CD44 markers. CSCs play a pivotal role in tumor development, drug resistance, and relapse after treatment. We aimed to evaluate the correlation between both marker expressions and clinicopathological indices in OED and OSCC patients.

Materials and Methods:

In this follow-up study, we could access 37 patients, including 12 OEDs and 25 OSCCs (Grade I: n = 9, Grade II: n = 8, and Grade III: n = 8). Data were analyzed using SPSS software (version 26) and log-rank tests, Fisher’s exact test, Chi-square, and one-way ANOVA. P < 0.05 was considered statistically significant.

Results:

There was no significant difference in the expression of CD24 and CD44 markers between the study groups (P > 0.05) and the expression of both markers and clinicopathological indices in the study groups (P > 0.05). The mean and standard deviation of overall survival (OS) were 54.46 ± 43.08 with a range of 6–193 months, and they were 8.24 ± 15.34 months with a range of 0–70 months for disease-free survival (DFS) in patients, respectively. The average of DFS in Grade I was significantly lower than the OED (P = 0.002) and Grade II (P = 0.039) groups. The OS average in the Grade I (P = 0.014) and Grade III (P = 0.004) groups was statistically lower than the OED group.

Conclusion:

Although more than half of the patients demonstrated high expression of both markers, there was no statistically significant difference between them and clinicopathological indices.
Patient Satisfaction Related to Nurse’s Specific Aspects of Communication and Nursing Care
Authors: Ao Bendangmenla
Published: August 2024

Background:

Nurses spend most of their time with the patient while admitted to the hospital, so it is essential and the patient’s perception to recognise, value and identify their needs and experiences during their hospital stay.

Objectives:

A descriptive study was undertaken to assess the level of patient satisfaction related to nurses’ specific aspects of communication and nursing care provided in a secondary hospital in Northeast, India.

Methods:

Using a simple random sampling technique, 140 patients were recruited for the study. Data were collected using a structured interview method designed by the investigator and validated by experts.

Results:

Analysis revealed that 43.6% scored >81 on the satisfaction level, and about 7.9% scored <50. Four domains were clubbed for assessments, of which 36% of the patients were slightly satisfied with the nurses related to the information and education given to them. About 46% were extremely satisfied with care and communication, 46% with respect and courtesy shown by nurses and 48% of the patients were extremely satisfied with nurses’ availability and timeliness. About 71% of the patients will come back to the hospital if required, and 76% will recommend the hospital to others. No significant association was found between patient satisfaction and demographic variables.

Conclusion:

Hospitals need to have an approach to measuring patient satisfaction, which could help assess the organisation and individual accountability, thereby increasing satisfaction amongst staff and patients.
Effect of a Self-instructional Module on Clinical Nurses’ Knowledge and Practice Regarding Prevention of Venous Thromboembolism in Post-operative Patients
Authors: Beons Sneha Merin , Mani Asha Liz
Published: August 2024

This pre-experimental study was done to assess the effect of a self-instructional module on clinical nurses’ knowledge and practice regarding the prevention of venous thromboembolism (VTE) in post-operative patients. The sample consists of 30 clinical nurses working in post-operative ICUs selected by purposive sampling technique. The tools used were a self-administered structured questionnaire on socio-demographic data and knowledge and an observation checklist on practice regarding the prevention of VTE. The study findings revealed that there was a significant difference between the pre-test and post-test knowledge and practice scores as the mean knowledge score of the post-test (16.93 ± 2.82) is higher than the pre-test score (13.70 ± 3.35) and the mean practice score of post-test (3.06 ± 1.17) is higher than the pre-test score (2.16 ± 0.74). There was a weak positive correlation between knowledge and practice scores (r = 0.08). The study findings also showed that there was no significant association between the pre-test level of knowledge and practice with selected demographic variables such as age, gender, qualification, total years of experience, previous knowledge on VTE and source of information. It can be concluded that the self-instructional module is effective in improving the knowledge and practice of clinical nurses in the prevention of VTE.
Immune Response to Respiratory Syncytial Virus
Authors: Alqirbi Hujaz Ismail Abdulrazzaq , Mahdi Batool Mutar , Almukhtar Mustafa
Published: August 2024

Respiratory syncytial virus (RSV) is an important cause of respiratory infection among children and infants globally. The first line of the immune response against this virus is neutrophils, macrophages, and innate lymphoid cells. Antigen-presenting cells such as dendritic cells which present the viral antigen to T lymphocytes that mediate viral clearance by T cytotoxic cells and initiate systemic lymphopenia. Humoral immunity will also be stimulated through B-cell-stimulating factors derived from epithelial cells of the respiratory tract that play an important factor in antibody production and induction memory to reinfection through IgG and IgA protective antibodies that are useful in vaccine production.
Knowledge Regarding Osteoporosis Risk Factors, Prevention, and Management in Women of Reproductive Ages; in Diyala, 2019
Authors: Majeed Noor Mohammed , Habib Huda Adnan
Published: August 2024

Background:

Osteoporosis is one of the major public health problems from which more and more people in the world are suffering. There is evidence suggesting that osteoporosis knowledge is one contributor to osteoporosis preventive behavior.

Aim of the Study:

To assess the knowledge regarding osteoporosis risk factors, prevention, and management in women of reproductive ages. To identify any association between knowledge and studied factors.

Methodology:

A cross-sectional study was carried out in three primary health-care centers (Al-Takia, Al-Saray, and Al-Mustafa primary health-care centers) from January 1, 2019, to November 31, 2019. A convenient sample of 400 women of reproductive age was selected. The data were collected using Osteoporosis Knowledge Assessment Tool through a direct interview with the women that included personal data, knowledge regarding osteoporosis risk factors, prevention, and management.

Results:

The majority of participants (56%) had moderate adequate knowledge about osteoporosis. The young age, being highly educated, and good economic status were significantly associated with good knowledge.

Conclusion:

Moderate adequate level of knowledge about osteoporosis was found among included subjects, the majority of subjects obtained their knowledge from Internet and physician. Thus, educational programs at all health-care facilities needed to improve the knowledge of women regarding osteoporosis.
The Outcome of the Laparoscopic Hysterectomy in Al-Yarmouk Teaching Hospital in 2022–2023
Authors: Turfa Abdalrahman Hammad , Tawfeeq Ibtihal Salim , Kadhim Sattar Jabbar
Published: August 2024

Background:

Hysterectomy is a common gynecological procedure used for various benign conditions like abnormal uterine bleeding, uterine prolapse, and fibroids. Different surgical methods, including vaginal, abdominal, laparoscopic, and robotic-assisted approaches, offer unique advantages and disadvantages. Total laparoscopic hysterectomy (TLH), introduced in 1989, offers benefits like smaller incisions, less blood loss, reduced pain, shorter hospital stays, and faster recovery.

Objectives:

The objective of this study was to evaluate patient outcomes, complications, and satisfaction with laparoscopic hysterectomy surgery.

Patients and Methods:

This cross-sectional study was conducted in Al-Yarmouk Teaching Hospital in Baghdad, General Surgery Department, from August 2022 to August 2023. Twenty-five patients who underwent laparoscopic hysterectomy for benign conditions were included. Patients were carefully assessed, ruling out malignancies through extensive clinical and radiological examinations, ultimately qualifying for the procedure. Data on patients’ demographics, comorbidities, previous surgical history, uterine size, indication for hysterectomy, type of procedures performed, and postoperative complications were gathered and subjected to analysis. The follow-up duration extended over 3 months, with assessments done on the 3rd day, 10th day, 1st month, and 3rd month postsurgery.

Results:

The mean age was 51.52 ± 9.47 years. Dysfunctional uterine bleeding was the most common indication (44%), followed by postmenopausal bleeding (32%). Most patients underwent TLH with bilateral salpingo-oophorectomy (BSO) (68%), and the mean operative time was 110 min. Complications were observed in 10 (40%) cases, with common issues being blood transfusion, port-site infection, and bladder injury. Hospitalization lasted 2 days, and postoperative pain reduced gradually over time. Patients who underwent concomitant BSO had significantly higher complications than those with isolated TLH. Postoperative pain levels were comparable between the two groups.

Conclusion:

Laparoscopic hysterectomy is an effective option for treating benign gynecological conditions, offering benefits like improved postoperative pain control and shorter hospital stays. However, the potential for complications, particularly in cases involving additional procedures, is to be considered.
A case series of melioidosis: An underdiagnosed entity in Kerala
Authors: Puthenpurayil Ebrahimkutty Shanimole , Kurian Pulikottil Shoba , Sam Alexander Vipin
Published: August 2024

Melioidosis is an emerging infection in India and is caused by a Gram-negative oxidase-positive bacilli, Burkholderia pseudomallei which is present in soil and surface water in the endemic region. Clinical manifestations are protean varying from asymptomatic infection, multiple skin abscesses, chronic pneumonia mimicking tuberculosis, and fulminant septic shock with abscesses in multiple internal organs. Isolation of bacilli from aspirated fluids remains the gold standard of diagnosis. Lack of microbiological services in many parts of the state, protean nature of clinical manifestations, lack of awareness among clinicians, and misidentification of the organism as Pseudomonas spp leads to delay in diagnosis and treatment. We have, retrospectively, analyzed 14 cases with culture-proven melioidosis diagnosed during 10 years. Case records of culture-positive patients were retrospectively analyzed for demographic data, clinical characteristics, management, complications, and clinical outcomes. Out of these, 13 cases were male. The most common age group affected was 50–59 years. The major occupation affected was manual laborer. Nonbacteremic melioidosis accounted for 12 cases. Concerning clinical presentations, intra-abdominal abscesses mainly in the liver and spleen accounted for seven cases. All the isolates were susceptible to ceftazidime, meropenem, and doxycycline, whereas 12 isolates were susceptible to chloramphenicol, 11 isolates were susceptible to trimethoprim–sulfamethoxazole combination, and 10 cases were susceptible to amoxicillin–clavulanic acid and ciprofloxacin. Ten cases recovered with ceftazidime administration along with surgical drainage of abscess and three cases recovered with meropenem administration and surgical drainage. One patient expired and was on piperacillin–tazobactam. Melioidosis is a disease of public health importance and early clinical and laboratory diagnosis is crucial in the effective management of melioidosis.
Analysis of Student Study Pattern for Personalized Learning using an Innovative Approach
Authors: Rao Aaryan , Goudar R.H , G M Dhananjaya , Rathod Vijayalaxmi , Kulkarni Anjanabhargavi
Published: August 2024

In an era of rapid technological advancements, the area of Artificial Intelligence and Machine Learning (AIML) is revolutionizing the way we learn and interact with technology. However, this influx of information can be over- whelming for students, making it challenging to absorb and retain knowledge within a short timeframe. Learning preferences vary greatly from individual to individual, with some students preferring video tutorials, others favouring hands- on practical experiences, and still others relying on traditional textbooks. To ad- dress this diverse range of learning styles, i.e., a need for an interactive application that provides regular assessments following each lesson, regardless of the chosen learning method. This application would analyse each student's performance to identify their most effective learning approach. This personalized approach is particularly valuable in large coaching institutes, where a limited number of instructors cannot effectively monitor the progress of thousands of students simultaneously. By incorporating additional learning materials and implementing specific adjustments, this application can significantly enhance the learning experiences to students and adult learners alike, empowering them to navigate the complexities of technology with greater confidence and ease.
IMPLEMENTASI METODE FORECASTING DENGAN MENGGUNAKAN ALGORITMA TIME SERIES DALAM MEMPREDIKSI PERMINTAAN CETAK CV. GRAND GRAFIKA
Authors: Tajrin Tajrin , Kuswoyo Yudyi , Ginting Rido Alfrado
Published: August 2024

Permintaan cetak merupakan salah satu satu hal terpenting dalam industri percetakan. Permintaan cetak yang tidak terduga dapat menyebabkan kelebihan ataupun kekurangan bahan baku serta produk jadi, hal ini lah yang dapat berdampak negatif bagi probabilitas perusahaan. Permintaan cetak juga merupakan tantangan utama bagi industri percetakan dalam memprediksi permintaan cetak yang akurat, hal ini juga lah yang dialami oleh CV. Grand Grafika. Penelitian ini bertujuan untuk mengimplementasikan metode forecasting dengan menggunakan algortima time series dan menggunakan model ARIMA (AutoRegressive Integrated Moving Average) dalam memprediksi permintaan cetak. Dari penelitian ini menghasilkan model ARIMA terbaik yaitu ARIMA (1,0,0) dengan nilai RMSE sebesar 10.69, MAPE sebesar 0.02, dan MAE sebesar 8.69.
MODEL DINAMIK PENGELOLAAN EKOSISTEM MANGROVE BERBASIS SILVOFISHERY DI PANTAI TIMUR SUMATERA UTARA
Authors: Siswoyo Bambang H. , Mardiana Siti , Sabrina Raja
Published: August 2024

Model dinamik pengelolaan ekosistem mangrove di Pantai Timur Sumatera Utara Tujuan penelitian ini adalah untuk mengetahui produktivitas ekosistem mangrove melalui produksi serasah yang terdiri dari potensi produksi perikanan melalui pendekatan produksi serasah mangrove, menghitung nilai nilai ekosistem mangrove dari potensi perikanan produksi serasah mangrove, perikanan budidaya tambak silvofishery, dan perikanan tangkap serta menentukan model dinamik nilai ekosistem mangrove untuk perikanan budidaya tambak silvofishery dan perikanan tangkap. Penelitian dilakukan pada bulan Agustus-Desember 2023, dengan lokasi pengambilan sampel di Kabupaten Langkat, Deli Serdang dan Serdang Bedagai. Data yang diperlukan meliputi karakteristik vegetasi mangrove, parameter fisika dan kimia lingkungan perairan, produksi serasah mangrove, data sosial ekonomi terkait pemanfaatan ekosistem mangrove, dan data sekunder. Potensi perikanan yang didukung oleh mangrove dihitung dengan metode yang dikembangkan oleh Mahmudi (2008), nilai perikanan budidaya dan tangkap diperoleh melalui pendekatan surplus konsumen. Berdasarkan penelitian, produksi serasah mangrove yang terdiri dari Avicennia marina, Avicennia alba, Rhizophora mucronata dan Sonneratia alba mencapai 3,67 g/m2/hari atau 13.282 kg/ha/thn. Potensi perikanan  budidaya tambak (udang) sebesar 91833 ton/th dan perikanan tangkap sebesar 8756 ton/th. Hasil simulasi model pada kondisi eksisting (rehabilitasi mangrove 0.7 ha/th), nilai total pemanfaatan mangrove tidak berkelanjutan karena terus mengalami penurunan. Sedangkan rehabilitasi mangrove minimal di atas 2.27 ha/th menghasilkan nilai ekonomi yang berkelanjutan. Rehabilitasi mangrove juga perlu memperhatikan komposisi jenis mangrove untuk menghasilkan potensi perikanan tangkap yang dapat didukung mangrove secara optimal sehingga dapat meningkatkan nilai total pemanfaatan mangrove..
How Do Doctoral Students Perceive Supervision? Lessons Learned from Indonesia
Authors: Nimasari Elok Putri , Irfan Syihabul , Ariyanti Ariyanti , Saifulloh Ahmad Iklil
Published: August 2024

Theorised in Vygotskyan sociocultural and Bakhtinian dialogical perspectives, this article addresses Indonesian postgraduates’ perceptions of their doctoral supervision for their thesis proposal. Twelve Indonesian doctoral students participated in this interpretative phenomenology study. Data were collected from semi-structured interviews lasting eight months. Drawing on interpretative phenomenological analysis, the findings identified four micro themes of sociocultural and dialogical theory (i.e., shared expertise, critical dialogue, constructive feedback, and encouraging diverse perspectives). The present study contributed empirical evidence on how doctoral students benefit from their supervisory process in sociocultural and dialogical perspectives embedded with different supervisory dimensions.
Upaya Membentuk Motivasi Belajar Peserta Didik melalui Model Flipped Classroom dalam Pembelajaran PAI
Authors: Alaniah Almas Sharfina , Soraya Irma , Hamdani Asep Saepul
Published: August 2024

The purpose of this study was to find out and analyze students' learning motivation through the flipped classroom model in PAI learning. This study uses a qualitative approach by uncovering and studying the application of the flipped classroom learning model in PAI learning. Data collection techniques were obtained through interviews and observations in order to gather information related to the implementation of the flipped classroom model. The research results explain that in the application of this learning model it can be carried out in different times and places between educators and students. This model prioritizes students to be more independent in learning. There are obstacles in the application of this learning, namely the difficulty of educators in monitoring students, students' weak memory, lack of support from parents, school facilities and infrastructure, and students' difficulties in understanding the lessons given. The efforts that can be made are to motivate students in overcoming obstacles from the flipped classroom learning model, namely refreshing, parenting counseling, innovation, and skill improvisation.
Implementasi Metode Pembelajaran Ibnu Khaldun dalam Meningkatkan Daya Tanggap Peserta Didik pada Pembelajaran PAI
Authors: Rambe Mgr Sinomba , Firdaus Muhammad , Suhefri Suhefri , Arfani Arlinda Ayu Diah , Atika Faizah Nur
Published: August 2024

The decline in students' responsiveness in understanding learning materials can hinder the achievement of learning objectives, often caused by the selection and use of inappropriate learning methods. This study aims to find learning methods that can improve students' responsiveness in PAI lessons at SD 100390 Sipiongot, based on Ibn Khaldun's learning methods. The research used descriptive qualitative methods with a case study approach through observation, interviews, and documentation. The results showed that some of the learning methods used at SD 100390 Sipiongot are: Repetition Method, which is applied to grades 1-3, improves memory. The Discussion Method, applied to grades 4-6, fosters critical thinking and improves responsiveness. The field trip method increases learners' responsiveness and provides new experiences.
TR81 Bölgesi illerinin Bölgesel Rekabet Edilebilirlik Açısından Analizi ve Karşılaştırması
Authors: Ceyhan Said , Bulbul Furkan
Published: August 2024

Dünya yerel ve bölgeselden başlayıp küresel boyutlara ulaşan bir ekonomik savaş ile karşı karşıyadır. Bu bağlamda ekonomik politikalarını doğru şekillendirip rekabet gücü yükselten bölgeler ve ülkeler büyümelerini pozitif yönde ilerletirken, ekonomik reformları yapamayıp, düzene ayak uyduramayanlar ise ekonomik ve sosyal krizler, geri kalmışlık, yoksulluk ve siyasal sorunlar ile mücadele etmektedirler. Rekabet gücü olgusunun yüksek olduğu bölge ve ülkeler diğer ülke ve bölgelere göre hızlı, dengeli ve sürdürülebilir gelişme imkanına sahip olmaktadırlar. Ülkelerin ulusal bazda olan bu duruma bazen de bir devletin farklı iki bölgesi arasında da görülmektedir. M. Porter’ın belirttiği gibi faktör ve talep koşulları, ilgili ve destekleyici kuruluşlar varlığı, firma stratejisi ve yapısı ile rekabet boyutu, kamu ve paydaş desteklerinin düzeyi yüksek olan bölge ve ülkelerin gelişmişlik düzeyi yüksekken diğer bölgelerin gelişmişlik düzeyi düşük kalmaktadır. Politika üretenler bu bağlamda gelişmişlik seviyesini yükseltmek ve rekabet edilebilirliğini arttırmak için birçok çalışmalar yapıp teşvik tedbirlerini almaktadırlar. Rekabet edilebilirlik olgusu ilk olarak firma bazında başlamış olsa da daha sonrasında ulusal, bölgesel ve iller arasında bile birçok çalışmalara konu olmuştur. Bu çalışmada Batı Karadeniz Bölgesi illerinin tüm sektörler bazındaki rekabet edilebilirlik gücü bakımından incelemesini yapılarak bölge illerinin kendi aralarında kıyaslama yapılmış ve her üç ilimizin rekabet gücü sıralaması yapılmıştır. Kendilerine has özellikleri olan bu illerin kişi başına düşen GSYİH’sından başlayan bu kıyaslamada illerin ekonomik, sosyal ve kültürel değerlerini de içine alarak rekabet edilebilirlik açısından göreceli sıralamasını yapmış bulunmaktayız. Bu bağlamda yapılan Üç Yıldız analizi neticesinde Bartın ilinde 8, Karabük ilinde 5 ve Zonguldak ilinde 20 sektörün rekabet avantajına sahip olduğu, akabinde yapılan saha çalışması ve Elmas Modeli analizi neticesinde ise göreceli olarak rekabetçilik açısından yüksekten düşüğe sırasıyla Zonguldak, Bartın ve Karabük olarak sıralamak mümkün olduğu ortaya çıkmıştır.
The Influence of Work Life Balance and Work Environment on Employee Performance with Job Satisfaction as a Mediation Variable at UPTD KPH North Bali
Authors:   Universitas Mahasaraswati Denpasar, Devi Putu , Landra Nengah ,   Universitas Mahasaraswati Denpasar, Kepramareni Putu ,   Universitas Mahasaraswati Denpasar
Published: August 2024

Employee performance is the appearance of an employee's work both in quantity and quality and is a measure or measure of whether an employee has carried out the duties and responsibilities given by the company as well as possible. Employee performance is the level of achievement or results of a person's work from targets that must be achieved or tasks that must be achieved or tasks that must be carried out in accordance with their respective responsibilities within a certain period of time. Respondents in this research were employees of UPTD KPH North Bali. The number of respondents in this study was 59 employees at UPTD KPH North Bali using a saturated sampling technique, namely a sampling technique in which all members of the population were used as samples. This research uses Path analysis program SmartPls 4.0. The results of this research show that: 1) work life balance has a significant positive effect on employee performance, 2) The work environment has a significant positive effect on employee performance, 3) Work life balance has a positive effect on job satisfaction, 4) The work environment has a positive effect significant impact on job satisfaction, 5) Job satisfaction has a positive and significant effect on employees, 6) Job satisfaction mediates the influence of work life balance on employee performance, 7) Job satisfaction mediates the influence of the work environment on employee performance
Identification, Detection and Enumeration of Klebsiella based on Culture-Independent Real-Time PCR: “The Klebsiella: ‘An Emerging Environmental Threats’ in Riverine-Systems”
Authors:   Department of Botany, Rastriya Kisan (PG) College, Shamli-247776 UP, India & Department of Botany, Banaras Hindu University, Varanasi-221005, UP, India, Bali Patel Chandra , Upadhyay Ram Sanmukh ,   Department of Botany, Banaras Hindu University, Varanasi-221005, UP, India
Published: August 2024

Klebsiella is one of the fecal coliform bacteria of family Enterobacteriaceae. It is an opportunistic pathogen which previously used as an indicator bacterium along with fecal coliforms namely Escherichia coli, Citrobacter, and Enterobacter, but is now known to cause various diseases in human beings. In present study we collected 126 samples from riverine-systems and confirmed the existence of Klebsiella using the conserved sequence of mdh gene with the application of SYBR green real-time PCR, which demonstrated very high specificity and stringency in detection strategy. The Klebsiella levels in surface water were 8.28 x102 ±17, 4.76 x103 ±122, 6.0 x103±178, 9.96 x103 ±315, 1.27 x104 ±463, 2.76 x104 ±1085, cfu/100ml; associated with hydrophytes were 5.80 x104 ±2320, 2.48x104±806, 2.86x104 ±963, 1.01x104 ±249, 2.62x104 ±830, 2.46x104 ±706 cfu/10g and in sediments were in the range of 1.89 x104 ±408, 2.46 x104 ±530, 3.20 x104 ±1004, 2.71 x104 ±777, 2.82 x104 ±693 and 8.88 x104 ±3214 cfu/10 g (p<0.05) at sampling site # 1, site # 2, site # 3, site # 4, site # 5 and, site # 6, respectively. This assay could be applied in the detection and monitoring of environmental samples to check waterborne diseases and Klebsiella caused outbreaks.