17315 research outputs found
Sort by
Between Gaps And Backlashes: b Unpacking Türkiye’sMigration Governance And Domestic Implications
Get PDFTürkiye has long served as a country of emigration, transit, and increasingly immigration,positioning it at the centre of regional migration governance. From hostingdisplaced populations in the early republican era to acting as a buffer zone duringthe Syrian refugee crisis, Türkiye has functioned both as a place of refuge and astrategic partner in migration management.This dissertation develops a two-level theoretical framework in which anti-immigrantparties seek to elevate the political visibility of migration, while governing partiesadopt selective restrictions to ease local pressures without altering their ideologicalstance. It traces four transformations in Türkiye’s migration governance since the2010s: legislative activity, institutionalisation, politicisation, and securitisation.Empirically, Chapter 3 examines the government’s dispersal policy using a differencein-differences design, showing that restrictions on immigrant settlement reducerental prices but do not erode support for the incumbent AKP. Chapter 4 appliesspatial voting models to national survey data, finding that incumbent voters discountPresident Erdoğan’s migration stance, whereas opposition voters reward restrictivealternatives.Overall, the findings reveal widespread anti-immigrant sentiment across party lines,shaped by fragmented governance that strains local communities but generates onlylimited electoral backlash. The study contributes to debates on restrictive migrationpolicies, their domestic political consequences, and partisan dynamics in host states
Forgiveness In Intimate Partner Violence: Love,Self-Making And Justice
Get PDFThis thesis examines the experiences of women and LGBTQ+ individuals in Turkeywho have faced intimate partner violence (IPV) in non-marital and financially independentrelationships. In a context where IPV is widespread yet often studiedwithin marriage, it highlights narratives that remain outside institutional recognition.Participants describe violence as deeply entangled with love and intimacy,where the boundaries between forgiveness and endurance are often blurred. Forgivenessappears less as a moral resolution than as an ambivalent practice shapedby cultural scripts and the pressures of staying. The analysis traces how survivorsnegotiate the emotional grammar of love: how pain is romanticized, how fantasiesof “the one” persist, and how love becomes both labor and social investment. Itfurther shows how survivors navigate stigma, shame, and contradictory expectations,reshaping their own subjectivities in the process. The role of communityand instutional responsibility emerges as central to how violence is endured andhow justice is imagined beyond formal institutions. By attending to the emotional,relational, and narrative dimensions of IPV, this study contributes to feminist debateson endurance, forgiveness, and justice. It shows how survivors live with harm,love despite it, and articulate selves that unsettle binary framings of weakness and empowerment
Becoming Human At The Reptile Center: An Ethnography Of The Psychıc Life Of Conservation
Get PDFThis thesis is an ethnography of a reptile conservation center employing a Lacanian-Zizekian theoretical stance to study the narrative frames through which conservationworkers relate to the environment, reptiles, conservation, in addition to their articulationof environmental ethics. Focusing on Lacanian concepts of alienation andfantasy, this thesis problematizes how the conservation narratives of green fantasyand conservation fantasy structure the workers’ meaning-making processes. It arguesthat while the direct contact with the reptiles they seek to protect enablesthe workers to feel themselves to be ethical and agentive, the neoliberal orderingof the conservation context challenges these beliefs. The resulting tension enablesus to observe the layered and situational articulation of environmental ethics at theintersection of fantasy and desire
Spectrotemporal Studies Of Magnetar Bursts And Their Origin Through Crustal Yielding
Get PDFOne of the most distinctive features of magnetars − the highly magnetized neutronstars − is their recurring emission of brief yet highly luminous bursts in hard Xrays/soft γ-rays. Once an active episode begins, a few to thousands of such burstscan occur over timescales from days to months. The temporal clustering of these recurrentbursts suggests an underlying mechanism triggering multiple bursts in rapidsuccession, which is likely crucial for understanding the processes driving magnetaractivity. In this thesis, we investigate the “triggering” mechanism of short magnetarbursts by modeling repetitive burst behavior through crustal interactions and employinga cellular automaton model for the magnetar crust. Our simulations, basedon physically motivated criteria, successfully reproduce burst clustering. Additionally,the durations and energetics of active episodes in our simulations agree wellwith observational data. Based on our results, we discuss the potential physicalmechanisms underlying burst clusters observed in numerous magnetars, as well asthe reactivations of an individual magnetar.We also investigate how the “triggered” system generates radiation (bursts) and howthis radiation evolves within the magnetosphere via time-resolved spectral analysisof 51 bright bursts from the magnetar SGR J1935+2154. Unlike conventional studiesin the literature, we follow a two-step approach to probe true spectral evolution. Foreach burst, we first extract spectral information from overlapping time segments, fitthem with three continuum models, and employ a machine-learning-based clusteringalgorithm to identify time segments that provide the largest spectral variationsduring each burst. We then extract spectra from those non-overlapping (clustered)time segments and fit them again with the three models: the exponential cutoffpower-law model, the sum of two blackbody functions, and the model consideringthe emission of a modified black body undergoing resonant cyclotron scattering,which is applied systematically at this scale for the first time. Our novel techniqueallowed us to establish the genuine spectral evolution of magnetar bursts. We discussthe implications of our results and compare their collective behavior with theav
Black Hole Solutions In Extended Metric-Palatini Gravity
Get PDFExtended metric-Palatini gravity, quadratic in the antisymmetric part of the affinecurvature, is known to lead to the general relativity plus a geometric Proca field.The geometric Proca, equivalent of the non-metricity vector in the torsion-free affineconnection, qualifies to be a distinctive signature of the affine curvature. In thisthesis, we explore how photon and particle motion near black holes can be used toprobe the geometric Proca field. To this end, we derive static spherically symmetricfield equations of this Einstein-geometric Proca theory, and show that it admitsblack hole solutions in asymptotically AdS background. We perform a detailedstudy of the optical properties and shadow of this black hole and contrast themwith the observational data by considering black hole environments with and withoutplasma. As a useful astrophysical application, we discuss constraints on the Procafield parameters using the observed angular size of the shadow of supermassiveblack holes M87∗ and Sgr A∗ in both vacuum and plasma cases. We then performa detailed analysis using the observational quasiperiodic oscillations (QPOs) data.We use the latest data from stellar-mass black hole GRO J1655-40, intermediatemassblack hole in M82-X1, and the super-massive black hole in SgA* (our MilkyWay) and perform a Monte-Carlo-Markov-Chain (MCMC) analysis to determine orbound the model parameters. Our results shed light on the allowed ranges of theProca mass and other parameters. The results imply that our solutions can coverall three astrophysical black holes. Overall, we find that the geometric Proca can beprobed via the black hole observations. Our analysis can also be extended to moregeneral metric-affine gravity theories
Torsion Points On Hyperelliptic Jacobian Varieties
Get PDFThis thesis presents a detailed study of explicit methods for constructing hyperellipticcurves over the rationals with new torsion orders on the Jacobian. We mentiontwo methods for this purpose.First, we utilize the relation between hyperelliptic curves and continued fractionsof power series. We find that for any integer N in the interval [3g,4g +1], g ≥3, satisfying specific partition constraints, there exist infinitely many families ofJacobians of hyperelliptic curves of genus g possessing a rational torsion point oforder N. We found some original examples of 1-parameter families of hyperellipticcurves. For example, hyperelliptic curves of genus 3 with the Jacobian possessingtorsion divisor of order 13, genus 4 with order 15, genus 5 with order 17, 18, and 21.In the second part, we present another method to construct hyperelliptic curvesfor which the Jacobians contains a torsion divisor of order quadratic in genus g.For any integer g ≥ 2, we construct hyperelliptic curves of genus g over Q whoseJacobian varieties contain rational torsion points of order N where N = 4g2+2g−2, respectively 4g2+2g−4. These curves introduce previously unobserved quadratictorsion orders and provide new torsion orders. For example, rational torsion pointsin the Jacobians of hyperelliptic curves of genus 4 with torsion order 70, and genus3 with torsion order 20.In the last chapter we work on elliptic curves. It was established which groups canoccur as torsion subgroups of elliptic curves over quartic number fields. Except forsome higher-order groups, we identify the quartic field with the smallest absolutediscriminant such that an elliptic curve over this field has the given torsion
Foam-based antibacterial hydrogel composed of carboxymethyl cellulose/polyvinyl alcohol/cerium oxide nanoparticles for potential wound dressing
No full textFoam-based wound dressing materials produced by dispersing gas phases in a polymeric material are soft, adapt to the body shape, and allow the absorption of wound exudate due to their porous structure. Most of these formulations are based on synthetic substances such as polyurethane. However, biopolymers have entered the field as a new player thanks to their biocompatible and sustainable nature. Incorporating biopolymers in formulations is gaining interest in scientific literature, and we extend this approach by adding antibacterial cerium oxide nanoparticles to biopolymer formulation. We introduce a novel biopolymer composite of carboxymethyl cellulose (CMC), polyvinyl alcohol (PVA), and cerium oxide nanoparticles (CeO2 NPs), namely PVA-CMC@CeO2. This mixture was first foamed and then cross-linked with sodium tetraborate solution, followed by a freeze-thaw process. After the novel material's spectroscopic, structural, and morphological characterization, we investigated its swelling, drug-delivery, antibacterial, and biodegradability properties PVA-CMC@CeO2 dressing effectively inhibits Escherichia coli (E. coli) and Staphylococcus aureus (S. aureus) growth and delivers the antibiotic drug silver sulfadiazine for up to 6 h. The antibacterial properties, good swelling, and drug release profile of the blend material show promising potential in wound care applications
On saturated flow boiling heat transfer of deionized water/ferrofluid on structured surfaces with or without external magnetic field
No full textFlow boiling is one of the most effective methods for achieving high heat dissipation rates. The manipulation of magnetic fluids (ferrofluid) is one of the popular approaches for heat transfer enhancement. This study aims to experimentally investigate the effect of magnetic nanoparticles on saturated flow boiling heat transfer (FBHT) on microstructured silicon surfaces. The FBHT performance was assessed in the absence and presence of an external magnetic field with bubble force analysis by considering a single bubble under flow boiling conditions. The experimental setup consisted of a rectangular minichannel with two heating blocks on the bottom and top sides. Two different structures, including square and circular cavities, were tested. SPIONs (superparamagnetic iron oxide nanoparticles) were employed as magnetic nanoparticles. Two different types of working fluid were utilized, including deionized water (DW) and ferrofluid (FF), which contained diluted SPIONs in water. Helmholtz coils were utilized to generate an external magnetic field. Visualization with a high-speed camera enabled the study of boiling heat transfer (BHT) and bubble dynamics characteristics along with parametric effects. Experimental tests were conducted under three conditions: tests with DW, tests with FF, and ferrofluid in the presence of a magnetic field (FF/MF). These tests were carried out at two mass fluxes (300 and 400 kg/m²s) and over a heat flux range of 26.28 - 142.8 W/cm². Adding nanoparticles further enhanced heat transfer and resulted in an increase in heat transfer coefficient (HTC) by up to 21% (from 32 to 38.7 kW/m2K). Moreover, application of an external magnetic field to the ferrofluid resulted in a reduction in the bubble departure size and an increase in HTC on the top surface, especially at high heat fluxes. The maximum HTC enhancement in the presence of the magnetic field was 25% (from 31.7 to 39.7 kW/m2K). These findings demonstrate the potential benefits of the use of magnetic nanoparticles and external magnetic fields to enhance flow boiling heat transfer on microstructured surfaces
Third-party interest, resource value, and the likelihood of conflict
No full textResource wealth induces predation incentives but also conflict-deterring third-party involvement. As a result, the relation between resource value and conflict probability is a priori unclear. This paper studies such relation with a theoretical framework involving a potential aggressor and a powerful third party. First, we show that, if the third party's incentives to intervene are sufficiently strong, conflict probability is hump-shaped in the resource value. Second, we theoretically establish that resource value increases the third party's incentive to side with the resource-rich defendant in case of intervention, providing another mechanism for stabilization when the resource value is high. Third, we explain how our theory relates to policy-relevant case studies involving conflict-ridden areas (including inter-state or civil conflicts) and powerful third parties