bluuebunny/crossref_metadata_2025 huggingface dataset:
Occurrence and Prediction of Flare After Tapering of Tumor Necrosis Factor Inhibitors in Patients With Axial Spondyloarthritis
Authors: Wetterslev Marie , Georgiadis Stylianos , Christiansen Sara Nysom , Pedersen Susanne Juhl , Sørensen Inge Juul , Hetland Merete Lund , Duer Anne , Boesen Mikael , Gosvig Kasper Kjærulf , Møller Jakob Møllenbach , Bakkegaard Mads , Brahe Cecilie Heegaard , Krogh Niels Steen , Jensen Bente , Madsen Ole Rintek , Christensen Jan , Hansen Annette , Nørregaard Jesper , Røgind Henrik , Østergaard Mikkel
Published: October 2023

Objective

Patients with axial spondyloarthritis (axSpA) in clinical remission tapered tumor necrosis factor inhibitor (TNFi) therapy according to a clinical guideline. Over a 2-year follow-up period, we aimed to investigate flare frequency, dose at which flare occurred, type of flare, and predictors thereof.

Methods

Patients in clinical remission (Bath Ankylosing Spondylitis Disease Activity Index [BASDAI] < 40, physician global score < 40, and without disease activity the previous year) tapered TNFi to two-thirds the standard dose at baseline, half at week 16, one-third at week 32, and discontinued at week 48. Flares were defined as BASDAI flare (BASDAI ≥ 40 and change ≥ 20 since inclusion), and/or clinical flare (development of inflammatory back pain, musculoskeletal or extraarticular manifestations, and/or Ankylosing Spondylitis Disease Activity Score [ASDAS] ≥ 0.9), and/or magnetic resonance imaging (MRI) flare (≥ 2 new or worsened inflammatory lesions).

Results

Of 108 patients, 106 (99%) flared before 2-year follow-up: 29 patients (27%) at two-thirds standard dose, 21 (20%) at half dose, 29 (27%) at one-third dose, and 27 (25%) after discontinuation. Regarding type of flare, 105 (99%) had clinical flares, 25 (24%) had BASDAI flares, and 23 (29% of patients with MRI at flare available) had MRI flares. Forty-one patients (41%) fulfilled the Assessment of SpondyloArthritis international Society (ASAS) definition of clinically important worsening (≥ 0.9 increase since baseline). Higher baseline physician global score was an independent predictor of flare after tapering to two-thirds (OR 1.19, 95% CI 1.04-1.41,P= 0.01). Changes in clinical and/or imaging variables in the 16 weeks prior to tapering did not predict flare.

Conclusion

Almost all (99%) patients with axSpA in clinical remission experienced flare during tapering to discontinuation, but in over half of these patients, flare did not occur before receiving one-third dose or less. Higher physician global score was an independent predictor of flare.
Splittings of triangle Artin groups
Authors: Jankiewicz Kasia
Published: October 2023

We show that a triangle Artin group

\mathrm{Art}_{MNP}

, where

M\leq N\leq P

, splits as an amalgamated product or an HNN extension of finite rank free groups, provided that either

M>2

or

N>3

. We also prove that all even 3-generator Artin groups are residually finite.
A dichotomy on the self-similarity of graph-directed attractors
Authors: Falconer Kenneth J. , Hu Jiaxin , Zhang Junda
Published: October 2023

This paper seeks conditions that ensure that the attractor of a graph directed iterated function system (GD-IFS) cannot be realised as the attractor of a standard iterated function system (IFS). For a strongly connected directed graph, it is known that, if all directed circuits go through a particular vertex, then for any GD-IFS of similarities on

\mathbb{R}

based on the graph and satisfying the convex open set condition (COSC), its attractor associated with that vertex is also the attractor of a (COSC) standard IFS. In this paper we show the following complementary result. If there exists a directed circuit which does not go through a certain vertex, then there exists a GD-IFS based on the graph such that the attractor associated with that vertex is not the attractor of any standard IFS of similarities. Indeed, we give algebraic conditions for such GD-IFS attractors not to be attractors of standard IFSs, and thus show that ‘almost-all’ COSC GD-IFSs based on the graph have attractors associated with this vertex that are not the attractors of any COSC standard IFS.
Sobolev algebras on Lie groups and noncommutative geometry
Authors: Arhancet Cédric
Published: October 2023

We show that there exists a quantum compact metric space which underlies the setting of each Sobolev algebra associated to a subelliptic Laplacian

\Delta=-(X_1^2+\cdots+X_m^2)

on a compact connected Lie group

G

if

p

is large enough, more precisely under the (sharp) condition

p > \frac{d}{\alpha}

, where

d

is the local dimension of

(G,X)

and where

0 < \alpha \leq 1

. We also provide locally compact variants of this result and generalizations for real second-order subelliptic operators. We also introduce a compact spectral triple (= noncommutative manifold) canonically associated to each subelliptic Laplacian on a compact group. In addition, we show that its spectral dimension is equal to the local dimension of

(G,X)

. Finally, we prove that the Connes spectral pseudo-metric allows us to recover the Carnot–Carathéodory distance.
Post-Hopf algebras, relative Rota–Baxter operators and solutions to the Yang–Baxter equation
Authors: Li Yunnan , Sheng Yunhe , Tang Rong
Published: October 2023

In this paper, first, we introduce the notion of post-Hopf algebra, which gives rise to a post-Lie algebra on the space of primitive elements and the fact that there is naturally a post-Hopf algebra structure on the universal enveloping algebra of a post-Lie algebra. A novel property is that a cocommutative post-Hopf algebra gives rise to a generalized Grossman–Larson product, which leads to a subadjacent Hopf algebra and can be used to construct solutions to the Yang–Baxter equation. Then, we introduce the notion of relative Rota–Baxter operator on Hopf algebras. A cocommutative post-Hopf algebra gives rise to a relative Rota–Baxter operator on its subadjacent Hopf algebra. Conversely, a relative Rota–Baxter operator also induces a post-Hopf algebra. Finally, we show that relative Rota–Baxter operators give rise to matched pairs of Hopf algebras. Consequently, post-Hopf algebras and relative Rota–Baxter operators give solutions to the Yang–Baxter equation in certain cocommutative Hopf algebras.
Geometry of Diophantine exponents
Authors: German Oleg Nikolaevich
Published: October 2023

Diophantine exponents are some of the simplest quantitative characteristics responsible for the approximation properties of linear subspaces of a Euclidean space. This survey is aimed at describing the current state of the area of Diophantine approximation that studies Diophantine exponents and relations they satisfy. We discuss classical Diophantine exponents arising in the problem of approximating zero with the set of the values of several linear forms at integer points, their analogues in Diophantine approximation with weights, multiplicative Diophantine exponents, and Diophantine exponents of lattices. We pay special attention to the transference principle.
Bibliography: 99 titles.
Computational Assessment of Occupant Injury Caused by Mine Blasts underneath Infantry Vehicles
Authors: Nilakantan Gaurav , Tabiei Ala
Published: October 2023

Anti tank (AT) mines and improvised explosive devices (IED) pose a serious threat to the occupants of infantry vehicles. The detonating explosives create shock waves, which induce large acceleration impulses and deformations in the vehicular structure. These impulse loads are transmitted to the occupant through vehicle-occupant contact interfaces such as the floor and seat. If the resulting loads and accelerations transmitted to the occupant are not sufficiently attenuated to values below thresholds set by occupant injury criteria, they can lead to severe injury and fatality. The occupant’s feet are usually in direct contact with the floor and therefore lower extremity injuries are very common during AT and IED explosions. This study focuses on the assessment of acceleration-induced injuries of lower extremities during a mine blast underneath an armoured vehicle, where the occupant's torso is shielded from the direct effects of the mine blast. Numerical models of the mine blast experimental test set-up are created using the dynamic finite element code LS-DYNA®. A numerical HYBRID III dummy is used to simulate the occupant’s response. Simulations results are compared with experimental data to validate the use of the HYBRID III dummy for injury assessment in such an application. The occupant lower extremity response to varying magnitudes of vehicle floor impact velocities caused by mine blasts is parametrically studied to lend insight into the maximum sustainable and survivable loading conditions as well as the design of protective structures that can be incorporated into the vehicle structure to attenuate these loads. Characteristic trends in the occupant response are used for predicting the response for new loading conditions. The effect of initial position of the occupant's lower extremities on the impact response and associated injury levels is also studied.
Self-Healing Performance of Carbon Fibre Reinforced Composite Containing Microcapsules under Tensile Load
Authors: Jhanji Kanu Priya , Asokan R. , Kumar R. Amit , Ramesh C.
Published: October 2023

Self-healing is fascinating research due to its distinctiveness in automatically mending the damages. A great deal of work has been done using the self-healing concept in polymers. However, there is limited research on fibre reinforced polymer composites. Adding microcapsules during fabrication of the composites is one of the methods which is capable of carrying out the healing of damage autonomously. This research work takes into account the preparation of fibre reinforced composites with incorporation of two types of microcapsules i.e., healing agent carriers and curing agent carriers in the course of fabrication to mend the damages generated. The work experiments the impact of inclusion of microcapsules on the tensile properties of host composite laminate. Results of tensile tests indicate that a significant amount of tensile strength of the specimens was restored by healing and curing agents present in microcapsules. The healing efficiency was observed as 61.3%. It has also been noted that, the presence of these capsules does not significantly alter the original performance of the laminate as the effect of capsule inclusion on properties of the laminate is negligible.
Convective Heat Transfer Study with an Array of Air Jets
Authors: Murthy Niranjan
Published: October 2023

The primary goal of this experimental investigation is to study the effects of various geometrical factors on heat transfer. The tests were performed by changing the heat flux from 0.025 to 0. 2K W/cm^2 and a jet Reynolds number from 2500 to 4500 with a jet exit to target object distance of 10 and 20mm.The test plate is a copper material of size 2mm by 2mm with a negligible thickness, a copper material is taken for its good thermal properties. In all the tested cases it is noticed that as the heat flux surges the plate temperature rise which in turn increase the heat transfer co-efficient. The value of h increases slowly with rise in Reynolds number in all the cases tested. The heat transfer results obtained from this research work is related by means of the simple relationship Nuavg =0.7 q^0.8 Re^0.25.
Addition of Coconut Shell Ash Particle with AZ31 Magnesium Alloy - Assessment of Tribological and Mechanical Behaviour
Authors: Kanthasamy S. , Ravikumar T.S. , Tamilanban T. , Hariram V. , Parthasarathy C. , Sriram K. Eswar , Basha S.K. Siraj , Khan Pathan Sajid
Published: October 2023

Desires of materials with lesser weight made wide spread use of alloys based on magnesium in automobiles and aerospace applications in the view of overcoming lower strength of these materials when compared to aluminium, these materials are added with some hard materials like ceramics, metal oxides or natural remaining as a reinforcing phase with a proof for improvement in properties. In the present work AZ31 alloy is strengthened by adding Coconut Shell Ash particles (CSAp) by means of powder metallurgy and the examinations like microstructure, micro hardness, compressive strength and wear are conducted. The ash particles content as reinforcement has not imparted larger variation in the strength and hardness, the wear resistance is increased with the addition of ash particles and the addition of CSAp exceeding 3% leads to crack.
Effect of Fiber Length and Loading on the Mechanical Characterization of Cyperus Pangorei Fiber Reinforced Vinyl Ester Composites
Authors: Balaji N. , Arul T.G. , Madhloom M.A. , Wadki Venkatesh , Kumar Ashok , Saravanakumar S. , Santhanam Raghavan , Krishnan V.K.
Published: October 2023

Polymer composites fabricated using plant fibers have become a dominant role in number of industries due to the outstanding results of their physical and mechanical characteristics when compared to traditional materials. The current study aims to develop lightweight and affordable composite materials using Cyperus pangorei fiber (CPF) and a vinyl ester (VE) resin matrix. Comparing the characteristics of composite materials created with different fiber lengths (3 to 11 mm) and contents (10 to 50% weight). The composite with 7mm fiber length and 40% of fiber content demonstrated the highest level of stability among the various fiber weight and lengths percentages tested. A composite system's fiber contents have a significant impact on its overall performance. The bonding of fibers and matrix of the specimens were good, according to SEM analysis. As a result, the current study suggests that the optimal CPF-reinforced VE composites would be a capable substitute to traditional materials for value-added engineering products.
Effects of Al2O3 Concentration in Ethylene Glycol on Convection Heat Transfer Coefficient
Authors: Basavaraj Kusammanavar , Elangovan K. , Shankar S. , Satyanarayan S.
Published: October 2023

The energy demand is more in the world due to increase in the populations. The sustainable and clean renewable energy is required to meet the demand. The solar energy with nanofluid used as heat transfer medium is the best alternative source to enhance the rate of heat transfer. The nanofluids are the suspended nano sized particles in the water, ethylene glycol or oil. The stability analysis of Al2O3 ethylene glycol carried out using zeta potential method. The 20nm sized Al2O3 nanoparticles with volume concentration from 0.01% to 1% in ethylene glycol is used as nanofluid to study the effects of concentration on convective heat transfer coefficient (HTC) and wall function HTC at temperature 298K and mass flow rate 0.033kg/s. The investigation also carried out to study the effects of concentration on its thermophysical properties of nanofluid. ANSYS fluent software used to carry out the numerical analysis with suitable thermal boundary conditions.
GWO based Robust Stabilization of DC Motor Fractional Order Speed Control System with Interval Coefficients
Authors: Silas Manjusha , Bhusnur Surekha
Published: October 2023

Robust stability analysis (RSA) is of significant concern for the robust behaviour of real-world control system applications. A stabilization strategy that assures stability and exhibits robust performance for a specified limit of system perturbations is necessary. This article presents an optimal robust stabilization method for a closed loop fractional order proportional integral derivative (FOPI^λD^µ) system involving DC motor with interval parametric uncertainty. To determine the optimum value of parameters for a FOPI^λD^µ controller to control the speed of a DC motor, Grey Wolf Optimizer (GWO), Genetic Algorithm (GA), Nelder-Mead (NM), Jaya and Whale Optimizer Algorithm (WOA) are applied with the same objective function involving ITAE criterion. FOPI^λD^µ offers two additional tuning parameters unlike a nominal PID controller and hence the former gives more flexibility in controller design than the latter in terms of transient response. The FOPID controller provides a faster closed-loop output augmented with improved robust properties of the system. Despite inherent non-linearities and time variation in system parameters, FOPI^λD^µ controllers depict enhanced performance. Using the concept of conformal mapping, robust stability analysis of fractional order polynomials is done with uncertain interval structure using Vertex and Edge theorem. Based on the value set, this paper demonstrates numerical and graphical optimal robust stability analysis of a system with variations observed in five parameters, considering the minimum argument root of the polynomial of the aforementioned closed-loop system.
Coordination Control Algorithm for Wheel Torque of Parallel Hybrid Vehicle
Authors: Ma J.X. , Lu B.B. , Lin X.F.
Published: October 2023

When the Parallel Hybrid Vehicle (PHV) wheel’s torque is coordinated and controlled, the issue of coordination control of wheel torque under mode switching has some limitations. Therefore, the experiment proposed a novel wheel torque coordination control technique for parallel hybrid vehicles. The feedforward and feedback joint control technique of the Wheel Drive Torque (WDT) control algorithm may be used to implement the wheel torque drive control. The technique for the wheel braking Torque Control (TC) is applied to obtain the wheel braking torque through the Fuzzy PID controller (F-PID). A Dynamic Coordination Controller (DCC) is created and the engine output torque is adjusted using the PID control technique of wheel angular velocity difference. The motor provides the compensation torque. The deviation of the intended angular velocity from the actual angular velocity is adjusted intime to realize the wheel's dynamic coordination while being controlled by a mode switch. The results demonstrates that the reaction time of the proposed algorithm can be reduced to 0.08s; The overall output TC precision is improved by 11.1%. The precision of the predicted velocity of vehicle speed tracking has risen by 8.0%. The vehicle dynamics during the transition procedure is improved by 4.4%, which enhances the ride comfort and the PHV’s power.
Regenerative Braking of BLDC Motor applied to Electric Vehicles
Authors: Doss M. Arun Noyal , Anuja T.A. , Eswar K.N.D.V. Sai , Raja M. Vinoth , Ramasubramanian V.S. , Shalini E. , Priya S.
Published: October 2023

Vehicle uses mechanical brakes to increase friction of wheels for deceleration purposes. However, kinetic energy is converted into thermal energy which reduces the wastage of energy. To avoid this condition regenerative braking scheme has been employed in electric vehicles. This paper proposes a simple method of braking with energy regeneration using BLDC motor for electric vehicles (EVs). Regenerative braking is a procedure in which energy is recovered while brakes are applied. Hence slowing the car, kinetic energy of the car is converted into electrical energy which in turn is used to top up the battery. Due to these, electric vehicles can run for a longer time and extended range without the need of being plugged into an external charger. Usage of brushless DC motor (BLDC) is recommended for implementing the regenerative braking scheme where it can improve efficiency and can extend the driving distance of electric vehicles.
Analysis of Tubular Visco-Elastic Suspension based Vibration Isolation in Wheeled Construction Vehicles
Authors: Yan Bijuan , Sun Dagang , Zhang Wenjun , Li Zhanlong
Published: October 2023

In order to improve the vibration-isolation of wheeled construction vehicle, a new type of tubular visco-elastic suspension is proposed in this paper. A half vehicle mathematical model is used to simulate the dynamics of wheeled construction vehicle in its vertical direction. To obtain vibration-buffering properties of the proposed tubular visco-elastic suspension, four different ground profiles are applied as inputs to the model. The vertical accelerations and displacements are analyzed between the tubular visco-elastic suspension and traditional rigid suspension. The analysis results show that the vibration level is decreased by the use of tubular visco-elastic suspension.
Vertical Vibration Analysis of the Flexible Carbody of High Speed Train
Authors: Hui Cao , Weihua Zhang , Bingrong Miao
Published: October 2023

The elastic vibrations in carbody affect the safety of suspension components and the riding comfort of high speed trains. The vertical vibration of a carbody was studied based on a coupled rigid-flexible dynamic model. The vibration characteristics and the transfer relationship under flexible effect were investigated in frequency domain. Analysis results show that the symmetrical and non-symmetric mode responses achieve maximum in specific wavelengths. The resonance speed and resonance wavelength of the first-order vertical bending vibration have significant impact on the operation of the train. When the modal frequencies of the carbody are equal to the natural frequencies, the carbody produces modal resonance. Therefore, high first-order bending frequency improves the safety and the riding comfort.
Computational Fluid Dynamics Analysis and Runner Test of Automobile Engine Intake Manifold Structure
Authors: Xinjie Zhang
Published: October 2023

Computational fluid dynamics analysis for three intake manifold schemes were carried out by STAR-CCM software to obtain the velocity field, pressure field and pressure loss equilibrium. Based on the simulation results, the best scheme was chosen to verify and validate the numerical results through a runner test. The simulation and test results helped the designer to accurately find the unreasonable section of intake manifold with a view to re-design or apply minor modifications followed by re-analysis of the intake manifold which can reduce the number of experiemental tests.
Genetic Algorithm Based Optimization of Box-Cross Section Modulus for Heavy Vehicle Chassis
Authors: Rajasekar K. , Saravanan R. , Sowmyashree S.
Published: October 2023

Chassis is the most important structural member in the on-road vehicles. All the loads generated by other components of the vehicle are transferred to chassis only. So the chassis structure has to be strong enough to withstand the loads. In order to overcome failure in the chassis structure, the variable cross-section chassis structure has to be designed based on the variable loads along the length of the vehicle. In this work genetic algorithm has been used to optimize the chassis cross section height, width and thickness by using their mathematical relationship with section modulus. The objective function is to optimize the section modulus based on bending moment equation. The optimization process is automated using C++language. The optimum values of the chassis cross section parameters were found to be efficient in the design of chassis.
Effect of Catalytic Coatings on the Performance, Emission and Combustion Characteristics of Spark Ignition Engines
Authors: Sakthivel P. , Nedunchezhian N. , Ponnusamy P.
Published: October 2023

This study discusses the effect of copper, nickel and chromium coating on the spark ignition engine performance, emission and combustion characteristics. The maximum brake thermal efficiency for copper coated engine is about 5% higher than standard engine at full load and about 4% higher than the standard engine at 2800 rpm. Nitrogen oxides emission for catalytic coated engine is 7% to 20% higher than standard engine at full load. It was observed that carbon monoxide and carbon dioxide emissions of standard engine were higher than catalytic coated engines at all loads. Copper coated engine has the lowest hydro carbon emission. Catalytic coated engines have 6% to 12% higher cyclinder pressure when compared to the standard engine. The crank angle of heat release values and combustion parameters indicate that a faster heat release occured for catalyst coated engines. Similarly combustion duration of standard engine is higher than that of catalytic coated engines. Catalytic coatings increase the pre-flame reactions which lead to better and faster combustion.
Wet Sliding Wear Optimization of Gray Cast Iron using Taguchi Technique
Authors: Ananth S. , Prakash J. Udaya , Moorthy T.V. , Hariharan P. , Magendran R. , Sivanesh A.R.
Published: October 2023

This paper details the investigation of wear characteristics of gray cast iron under dry, SAE15W40 and SAE20W40 oil lubricated sliding conditions. The effects of applied load, sliding speed and sliding distance on the specific wear rate of gray cast iron were studied using pin-on-disc wear testing machine. The experimental data were analyzed by using the robust technique of Taguchiâ€™s orthogonal arrays. The specific wear rate was analyzed using signal to noise ratio and analysis of variance.
Laboratory Scale Testing of Thermoelectric Regenerative Braking System
Authors: Sevvel P. , Thangaiah I.S. Stephan , Mukesh S. Mars , Anif G. Mohammed
Published: October 2023

Thermoelectric Regenerative Braking System (TERBS) employs an energy recovery mechanism by utilizing the energy conversion at the time of braking in an automobile to generate electricity accordingly. During braking, the kinetic energy of the disc rotor which is transformed into heat energy is recovered using a Thermoelectric Generator (TEG). A comparison of performance between air and water cooled heat sink is made and then the optimum way of cooling is selected for the TERBS. A customized TEG module with water cooled heat sink is designed. The experimental results are analyzed for optimum performance. TERBS evidently increased the life of a battery.
Experimental Investigation of Sisal, Coir and Sugarcane Fibre Reinforced Polymer Matrix Composites
Authors: Gurusamy P. , Bestall Leo C. , Pandian J. Arun
Published: October 2023

The natural fibre-reinforced polymer matrix composites can be used both in industrial applications and in research field. These polymer matrix composites are low cost, renewable and completely or partially recyclable. In this study, hand layup method has been used with the combinations of coir, sisal fibre and sugarcane skin to fabricate composite specimens for tension, compression and flexural strength tests. From the test results, the sisal fibre composites have shown the promising tensile and compressive strengths. Further, it is also shown that the sugarcane fibre has good flexural strength compared to sisal and coir fibre reinforced polymer composite specimens.
Proof of Concept Fabrication of Multi-axis Pneumatic Mechanism for Dumpers
Authors: Sevvel P. , Kannan V. Nirmal , Parameshwaran S. , Kumar Mohan
Published: October 2023

At many building sites there isnâ€™t sufficient space to manoeuvre the dumper in various directions to discharge the material to the front and side ways. In such situations, there is a growing demand of multi-axis articulated dumpers. This work deals with the fabrication of scale down prototype of three way dropping dumper wherein the dumper is operated using pneumatic tilting mechanism. There are three hydraulic cylinders which are operated by motor and gearbox to tilt the dumper body in all three directions. To maintain optimum efficiency of pneumatic system, the pressure drop between generation and consumption of compressed air is kept very low. Based on the initial prototype and tilting trials, it is demonstrated that this multi-axis system can be fully implemented in large scale. Further, the proposed pneumatic system can be automated with additional control system replacing the socket-pin arrangement to change the tilt directions with minimum human intervention.
HİYERARŞİK İŞÇİ ATAMASI İLE TİP-II MONTAJ HATTI DENGELEME PROBLEMİ İÇİN BİR MATEMATİKSEL MODEL
Authors: Karaş Çelik Aslıhan , Özçelik Feriştah
Published: October 2023

Geleneksel montaj hattı dengeleme (MHD) probleminde, görevlerin işlem sürelerinin sabit ve işçiden bağımsız olduğu varsayımı bulunmaktadır. Ancak, işlem süreleri; tecrübe ve yetenek gibi etmenler dolayısıyla işçiler arasında değişkenlik göstermektedir. İşçilerin hiyerarşik seviyelere ayrılarak işlem sürelerinin ve maliyetlerinin seviyeler arasında farklılık gösterdiği problem türü, hiyerarşik işçi ataması ile montaj hattı dengeleme (HİAMHD) problemi olarak bilinmektedir. Bu çalışmada, literatürde ilk kez HİAMHD problemi için iş istasyonu sayısının belirli olduğu durumda, çevrim süresinin ve toplam işçi maliyetinin enküçüklenmesi ele alınmaktadır. Problemin çözümü için bir matematiksel modelleme yaklaşımı geliştirilmiş ve literatürde bulunan test problemleri uyarlanarak önerilen modelin performansı değerlendirilmiştir.
Cerrahi Hemşirelerin Eleştirel Düşünme Eğilimleri ile Kanıta Dayalı Hemşireliğe Yönelik Tutumlarının İncelenmesi
Authors: TAŞÇI Ömer , ÖZER Nadiye
Published: October 2023

Giriş: Perioperatif bakım ortamları zaman zaman karmaşık, hızlı, tempolu ve tahmin edilemeyen durumların meydana gelebildiği yerlerdir. Bu bakım ortamında akılcı karar vermeyi ve en iyi araştırma kanıtlarının kullanımını amaçlayan eleştirel düşünme ve kanıta dayalı hemşireliğin önemi büyüktür.

Amaç: Araştırma, hemşirelerin eleştirel düşünme eğilimleri ile kanıta dayalı hemşireliğe yönelik tutumlarının incelenmesi amacıyla yürütüldü.

Yöntem: Tanımlayıcı türdeki araştırma, Aralık 2017-Aralık 2018 tarihleri arasında gerçekleştirildi. Bir devlet üniversitesi Sağlık Araştırma ve Uygulama Merkezi ile bir devlet hastanesi cerrahi kliniklerinde çalışan 317 hemşireyle yürütüldü. Veri toplamada, tanıtıcı özellikler formu, meslek algısı formu, Kaliforniya Eleştirel Düşünme Eğilimi Ölçeği (KEDEÖ) ve Kanıta Dayalı Hemşireliğe Yönelik Tutum Ölçeği (KDHYTÖ) kullanıldı. Veriler, yüzdelik dağılım, ortalama, bağımsız örneklem t, tek yönlü varyans analizi, Mann Whitney-U, Kruskall Wallis, Cronbach’s α ve Pearson korelasyon testleriyle analiz edildi.

Bulgular: Toplam puan KEDEÖ’de 255.57 ± 27.46 (orta düzey) ve KDHYTÖ’de 59.17 ± 8.43 (olumlu) bulundu. KEDEÖ’nün “Kendine Güven” alt boyutuyla KDHYTÖ’nün “Kanıta Dayalı Uygulama Niyeti” ve “Kanıta Dayalı Hemşirelikle İlgili Duygular” alt boyutları dışında tüm alt boyut ve toplam puan ortalamaları arasında istatistiksel olarak pozitif yönde anlamlı bir ilişki belirlendi (p < .05).

Sonuç: Sonuç olarak, hemşirelerde, iş yoğunluğunun artmasının eleştirel düşünme eğilimini artırdığı; kanıta dayalı uygulamaları sık kullanmanın, kanıta dayalı uygulamalar hakkında bilgi verilmesi gerekliliğine inanmanın, kanıta dayalı uygulamayla ilgili eğitim almanın ve bilimsel çalışmaları takip etmenin kanıta dayalı hemşireliğe yönelik tutumu olumlu etkilediği; eleştirel düşünme eğilimi arttıkça kanıta dayalı hemşireliğe yönelik tutumun pozitif yönde etkilendiği söylenebilir.
Senior Baccalaureate Nursing Students’ Experiences of Self-Compassion: A Qualitative Descriptive Study
Authors: SERÇE YÜKSEL Özgü , GÜNÜŞEN Neslihan , ÇELİK İNCE Sevecen
Published: October 2023

Background: Self-compassion has been discussed in recent years as a concept that can facilitating compassionate care. However, little is known about the meaning of self-compassion and its place within nursing care for nursing students.

Objectives: The aim of the study was to explore the self-compassion experiences, perceptions of the importance of self-compassion in patient care, and barriers to self-compassion of senior baccalaureate nursing students.

Methods: This research constitutes a qualitative descriptive study. The data were analyzed using qualitative content analysis.

Results: Three themes emerged: (1) am I able to show compassion for myself as I show it for others?, (2) barriers to self-compassion, and (3) Improving self-compassion.

Conclusion: It was concluded that self-compassion is important for providing compassionate care from the perspective of senior baccalaureate nursing students. The findings suggest the necessity of integrating the concept of self-compassion into undergraduate education by being aware of any barriers to self-compassion.
Acil Servise Başvuran Hastalarda Covid-19 Korkusu ve Yaşam Doyumu İlişkisi
Authors: TÜRK Aytuğ , ŞAHAN Hatice , ENGİN Esra
Published: October 2023

Giriş: COVID-19 salgını başlangıçta fiziksel sağlık için risk oluşturan küresel bir tehdit olmakla birlikte, sonraki süreç boyunca birçok psikososyal sorunu da beraberinde getirmiştir.

Amaç: Araştırma yetişkin bireylerin yaşadığı COVID-19 korkusu ile yaşam doyumu arasındaki ilişkinin ve etkileyen etmenlerin belirlenmesi amacıyla gerçekleştirilmiştir.

Yöntem: Tanımlayıcı kesitsel nitelikte olan araştırma verileri, Şubat 2021- Haziran 2021 tarihleri arasında bir İlçe Devlet Hastanesi Acil Servisi’ ne ayaktan başvuran, çalışmaya katılmayı kabul eden 185 bireyden elde edilmiştir. Veriler sosyo-demografik veri formu, Korona Korkusu Ölçeği, Yaşam Doyum Ölçeği ile toplanmıştır. Verilerin değerlendirilmesinde ortalama, standart sapma, yüzde, bağımsız gruplarda T testi ve ikiden fazla grupların karşılaştırılmasında One-way ANOVA testi ve ölçekler arasındaki ilişkinin belirlenmesinde Pearson korelasyon analizi kullanılmıştır.

Bulgular: Katılımcıların “COVID-19 Korkusu Ölçeği” puan ortalaması 23.22+7.89, “Yaşam Doyumu Ölçeği” puan ortalamaları ise 12.16+5.07’dir. COVID-19 korkusu ile yaşam doyum düzeyi arasında negatif yönde, ileri düzeyde anlamlı ve orta şiddette korelasyonel ilişkinin varlığı tespit edilmiştir (r = -.372, p<.001). Aynı zamanda COVID-19 korkusu, yaşam doyumu düzeyindeki varyansın anlamlı bir bölümünü (%13.9) açıklamaktadır (R2 = -13.9, F = 29.28, p <.001).

Sonuç: Çalışmamızda, katılımcıların COVID-19 korkusunun orta düzeyin üzerinde, yaşam doyumlarının ise orta düzeyde olduğu saptanmış olup; COVID-19 korkusu arttıkça yaşam kalitesinin azaldığı belirlenmiştir.
0-12 Yaş Çocuğu Olan Ebeveynlerin Sağlık Okuryazarlık Düzeyinin Akılcı Antibiyotik Kullanım Algılarına Etkisi
Authors: GÜRKAN Kübra Pınar
Published: October 2023

Giriş: Antibiyotiklerin yanlış ve gereksiz kullanımı sonucu oluşan antibityotik direnci önemli bir halk sağlığı sorunudur. Çocukların antibiyotik kullanımı aileleri tarafından yönetilmektedir.

Amaç: 0-12 yaş çocuğu olan ebeveynlerin sağlık okuryazarlık düzeylerinin akılcı antibiyotik kullanımına etkisidir.

Yöntem: Tanımlayıcı ve ilişkisel bu araştırma Ocak-Mart 2022 tarihleri arasında üç Aile Sağlığı Merkezi’nde (ASM) 708 ebeveyn ile yürütülmüştür. Veriler; tanımlayıcı bilgi formu, Anne-baba antibiyotik algıları ölçeği, sağlık-okuryazarlık ölçeği ile toplanmıştır. Verilerin değerlendirilmesinde ortalama, bağımlı gruplarda t testi, tek yönlü varyans analizi, pearson korelasyon, ve regresyon analizi kullanılmıştır.

Bulgular: Ebeveynlerin akılcı antibiyotik kullanım algısını en çok sağlık güvencesi varlığı (β=-6.57), anne eğitim düzeyi (β=5.15), son bir yılda antibiyotik kullanımı (β=1.78), yaşanılan yer (β=-1.47) ve sağlık okuryazarlık düzeyi (β= .444) etkilediği saptanmıştır.

Sonuç: Ebeveynlerin akılcı antibiyotik kullanım algıları sağlık okuryazarlık düzeyleri ve bazı sosyo-demografik özelliklerden etkilendiği bulunmuştur. Bu doğrultuda özellikle riskli gruplarda bulunan ebeveynlerin akılcı antibiyotik kullanım algılarını yükseltmek için sağlık okuryazarlık eğitimlerinin verilmesi önerilmektedir.
Psikiyatri Kliniğinde Çalışan Hemşirelerin Hasta Düşmeleri ve Önlenmesine İlişkin Bilgi ve Görüşleri
Authors: ŞEN Elif , ÇETİNKAYA DUMAN Zekiye
Published: October 2023

Giriş: Psikiyatri servislerinde hasta düşmeleri büyük bir güvenlik problemidir.

Amaç: Bu araştırma psikiyatri kliniklerinde çalışan hemşirelerin hasta düşmeleri ve önlenmesi ile ilgili bilgi ve görüşlerini belirlemek amacıyla yapılmıştır.

Yöntem: Çalışma tanımlayıcı tipte bir araştırmadır. Araştırma Haziran-Eylül 2017 tarihleri arasında İzmir’de iki üniversite hastanesi, iki eğitim ve araştırma hastanesi, bir devlet hastanesi ve bir Ruh Sağlığı ve Hastalıkları Hastanesi’nin psikiyatri kliniklerinde yapılmıştır. Araştırmanın örneklemini 80 hemşire oluşturmuştur. Veriler hemşirelerin hasta düşmeleri ve önlenmesine ilişkin bilgi ve görüşlerini değerlendirme formu ile toplanmıştır. Verilerin değerlendirilmesinde sayı-yüzde, ortalama ve standart sapma kullanılmıştır.

Bulgular: Psikiyatri kliniğinde çalışan hemşirelerin %97.5’i serviste hasta düşmeleriyle karşılaşmıştır. Hemşirelerin %85’i görülmeyen ve bildirilmeyen düşmelerin olabileceğini belirtmiştir. Hemşirelerin %88.8’i hasta düşmelerini önemli bir sorun olarak görmekte ve %87.5’ i düşmelerin önlenmesinde rolü olduğunu düşünmektedir. Hemşirelerin %57.5’ i hasta düşmeleri ve düşmeleri önleme ile ilgili eğitim almaya ihtiyaç duyduklarını belirtmişlerdir.

Sonuç: Psikiyatri kliniklerinde hemşirelerin bildirimlerine göre hasta düşmeleri oldukça fazla olmaktadır. Karşılaşılmayan ve görülmeyen hasta düşmelerinin hemşireler tarafından oldukça fazla olduğunun belirtilmesi bu birimlerde düşme riskinin değerlendirilmesi ve risk düzeyine göre koruyucu önlemlerin alınması gerektiğini göstermektedir. Psikiyatri kliniklerinde çalışan hemşirelere yönelik düşme riskini değerlendirme ve terapötik ortamda düşmeleri önlemeye yönelik önlemler konusunda önleyici programların oluşturulması ve uygulanması önerilir.
Bariatrik Cerrahi Sonrası Hızlandırılmış İyileştirme Protokolleri ve Hemşirelik Bakımı
Authors: YASAK Kübra , VURAL Fatma
Published: October 2023

Son yıllarda tıbbi gelişmelerle birlikte ameliyat öncesi- sırası- sonrası süreçlerinde hasta bakımı kanıta dayalı uygulamalara göre yapılmaktadır. Cerrahi Sonrası Hızlandırılmış İyileşme (Enhanced Recovery After Surgery; ERAS) protokolü kanıta dayalı uygulamalar arasında yer almaktadır. Bu protokoller her alanda özelleştirilmiştir. Bu alanlardan biri ise bariatrik cerrahi sonrası hızlandırılmış iyileştirme protokolleridir. Cerrahi hemşiresi ameliyat öncesi- sırası- sonrası olmak üzere cerrahi sürecin her noktasında aktif rol almaktadır. Bu çalışmada, hemşirelerin bariatrik cerrahi için hastaneye başvuran hastalara verecekleri bakımda kanıta dayalı uygulamalardan yararlanması, ayrıca hemşirelik alanına yeni ve kanıta dayalı bir bakış açısı kazandırması hedeflenmektedir.
INFLUENCE OF THE MULTIPLICITY OF THE EARTH'S SURFACE UNDERMINING ON THE VALUE OF THE SUBSIDENCE ANGLE
Authors:   Institute of Comprehensive Exploitation of Mineral Resources Russian Academy of Sciences, KULIBABA S.B.
Published: October 2023

It is shown that the existing method for determining the boundaries of the hazardous impact of underground mining on the earth's surface using regulated subsidence angles is incorrect. The type and parameters of the dependence of changes in the actual subsidence angles, determined by the criteria of inclinations and relative horizontal deformations of the earth's surface, on the multiplicity of its undermining and the angular characteristics of the displacement process are established.
SOCIO-SPATIAL TRANSFORMATION: PERSPECTIVE OF MANAGEMENT OF COASTAL AREA DEVELOPMENT BASED ON OPTIMISING THE ROLE OF LOCAL COMMUNITIES IN MANADO CITY, INDONESIA
Authors:   Bosowa University, SURIANDJO HENDRIK , SURYA BATARA ,   Bosowa University, SALMAN DARMAWAN ,   Hasanuddin University, BAHRI SYAMSUL ,   Bosowa University, MANAF MURSHAL ,   Bosowa University, MUHIBUDDIN ANDI ,   Bosowa University, YUDONO ANANTO ,   Hasanuddin University, SYAFRI SYAFRI ,   Bosowa University
Published: October 2023

Socio-spatial transformation of urban architecture is a process that changes the elements of urban architecture and its formers. Development in coastal areas always impacts local communities on the coast. Sometimes they experience a process of change that requires them to adapt and even integrate situationally. This study aims to describe the socio-spatial transformation reality of contemporary urban architectural elements through a phased dynamic from the perspective of local communities in urban coastal areas. The method is conducted by qualitative research method. This is a single case study to identify a specific case used to study real-life cases of the initiation of adaptation and integration of local communities. Data were obtained through participant observation, documentation and inductive in-depth interviews and focus group discussions that focused on descriptive theme analysis to understand the process of socio-spatial transformation of urban architectural elements in urban coastal local communities. The result of this study is a cycle of socio-spatial transformation of urban architectural elements is formed, consisting of (1) the natural, normal phase; (2) the adaptation initiation phase; and (3) the integration phase.
ANTECEDENTS OF ORGANIC FOOD PURCHASE INTENTION: DOES IT MODERATE BY THE RECEPTIVITY TO GREEN COMMUNICATION?
Authors:   Universiti Teknologi MARA, ABDUL LATIP MUHAMMAD SAFUAN , TUMIN SITI AISYAH ,   Universiti Teknologi MARA, YONG RACHEL YUEN MAY ,   Universiti Putra Malaysia
Published: October 2023

Given the global environmental degradation due to conventional food consumption and demand, sustainable food consumption (organic food) counters the deterioration by increasing consumers’ sustainable food consumption. As organic food development in Malaysia remains in its infancy as a niche market, research on green marketing with localised applications remains scarce and does not significantly catalyse organic food demand. The study investigates the consumers’ attitudes, perceived social pressure, autonomy, and receptivity to green communication toward organic food purchase intention. The study applied a causal analysis where a quantitative method was employed. Purposive sampling was employed in the study, where primary data was used for analysis through an online survey. The survey employed five Likert scale measurements where data were collected in Malaysia, and 268 valid responses were obtained. The data were analysed using SPSS and AMOS software. The finding revealed a significant influence of personal attitude, perceived autonomy, and receptivity to green communication on organic food purchase intention. Perceived social pressure did not indicate a statistically significant relationship towards organic food purchase intention. Receptivity to green communication was found to be statistically insignificant as a moderator. Stakeholders and organic food producers may benefit from the study’s detailed analysis of the market’s current state to better predict its growth and ensure the industry’s long-term viability.
ASSOCIATION BETWEEN INSULIN THERAPY ADHERENCE AND GLYCATED HAEMOGLOBIN (HbA1c) AMONG PATIENTS WITH TYPE 2 DIABETES MELLITUS ATTENDING A COMMUNITY HEALTH CLINIC
Authors:   Universiti Teknologi MARA, YAHYA NUR SHAZWANIZA ,   Sungai Buloh Health Clinic, AWANG AZLINA ,   Bukit Cherakah Health Clinic, NORDIN ROSWATI ,   Universiti Teknologi MARA
Published: October 2023

Insulin therapy is a recommended treatment for diabetes mellitus. Despite knowing insulin is one of the recommended treatments for glycemic control, adherence to insulin therapy still plays the main challenge in achieving good control of glycated haemoglobin (HbA1c). This study aims to determine adherence and compare HbA1c levels before and after six months of insulin therapy among type 2 diabetes patients (T2DM). This cross-sectional study was conducted among 300 participants with T2DM at Sungai Buloh community health clinic, Selangor. A self-administered questionnaire Morisky Insulin Adherence Scale (MIAS), was used to measure the study adherence variable. Data were analysed using a statistical package for the social science (SPSS) version 23. 11 (3.7%) of respondents had good adherence,109 (36.3%) had moderate adherence, and 180 (60%) were poor adherence. The mean HbA1C at baseline is 9.654 mmol/L and reduced to 9.194 mmol/L after six months of insulin therapy. Education shows an association towards adherence level with p-value = 0.004 and significantly found an association between HbA1c and insulin adherence with p < 0.05. The study found that most respondents have poor adherence to insulin therapy. Therefore, essential to highlight adherence issued to achieve good glycaemic control.
AN ANALYTICAL STUDY OF AWARENESS ABOUT CATARACTS AND VISUAL IMPAIRMENT AMONG UNIVERSITY STUDENTS
Authors:   Universiti Teknologi MARA, SAFFEI NUR SYAWANI , IBRAHIM WAN NUR AMIRAH ,   Universiti Teknologi MARA, WOI PUI JUAN ,   Universiti Kebangsaan Malaysia
Published: October 2023

Cataract is the leading cause of blindness worldwide. This study aimed to assess and compare the awareness levels about cataracts leading to visual impairment between health sciences and non-health sciences university students. A comparative cross-sectional study design was conducted on 432 participants aged 19 to 27 (mean 22.75 ± 1.90), with an equal number of 216 participants from health sciences and non-health sciences students. The data was collected using a questionnaire through an online platform (Google Form). Most respondents (81.5%) had heard about cataracts and knew that cataract incidence increases with age. Most respondents (72.2%) were aware that radiation risks cataracts. 20.1% of the respondents did not aware that cataract surgery is free in government hospitals for certain circumstances. Cataract awareness was statistically higher among health sciences students (1.73 ± 0.13) compared to non-health sciences students (1.52 ± 0.16), t(430) = 13.68, p = 0.001. More than half of the respondents were aware of cataracts and their risk factors, but some still did not know about government hospitals’ free cataract surgery service. High awareness among university students will undoubtedly benefit them and raise awareness of those around them, including their families.
FUNCTIONAL RECOVERY OF DISTAL RADIUS FRACTURE: AN INTERPRETATIVE PHENOMENOLOGICAL ANALYSIS
Authors:   Universiti Teknologi MARA, MD SAZALI NUR ASHYIKIN ,   Hospital Canselor Tuanku Muhriz, AMAN NURUL AFIQ’AH ,   Universiti Teknologi MARA,   Perdana University, MOHAMAD SABRI MOHAMAD QAYUM ,   Universiti Teknologi MARA, ABDUL HALIM MOHD AZAM ,   Universiti Teknologi MARA,   Institut Latihan Kementerian Kesihatan Malaysia, JUDD JENNI ,   Central Queensland University, CHE DAUD AHMAD ZAMIR ,   Universiti Teknologi MARA
Published: October 2023

Distal Radius Fracture (DRF) is the most common upper limb fracture, which reduces independence in daily living activities. This study explored the functional recovery of distal radius fracture six months post-injury. We conducted a qualitative study using an Interpretive Phenomenological Analysis (IPA). 11 adults aged 18 and 59 with DRF participated in face-to face, semi-structured, and in-depth interviews recorded digitally. In addition, transcribed recordings were analysed thematically. Four themes emerged from the analysis: (i) I could do or could not do, (ii) How I live my life, (iii) What I feel like, and (iv) Something is wrong with my hand. Following over six months of injury, all participants experienced physical limitations where most participants reported reduced daily activities performance. Consequently, some participants developed adaptive strategies to enhance their daily activities’ ability. DRF also affected their psychological aspects. Overall, DRF affects individuals’ functioning in daily living activities, work and leisure for over six months post-injury. This study highlights that occupational therapists need to maintain or strengthen functional recovery and support individuals with DRF even for over six months post-injury.