Ultrafast laser synthesis of zeolites

Research demonstrates that zeolite nucleation and growth can be controlled by fine-tuning chemical composition, temperature, and pressure, resulting in structures with diverse porosities and functionalities. Nevertheless, current energy delivery methods lack the finesse required to operate on the femto- and picosecond timescales of silica polymerization and depolymerization, limiting their ability to direct synthesis with high precision. To overcome this limitation, an ultrafast laser synthesis technique is introduced, capable of delivering energy at these timescales with unprecedented spatiotemporal precision. Unlike conventional or emerging approaches, this method bypasses the need for specific temperature and pressure settings, as nucleation and growth are governed by dynamic phenomena arising from nonlinear light-matter interactions, such as convective flows, cavitation bubbles, plasma formation, and shock waves. These processes can be initiated, paused, and resumed within fractions of a second, effectively "freezing" structures at any stage of self-assembly. Using this approach, the entire nucleation and growth pathway of laser-synthesized TPA-silicate-1 zeolites is traced, from early oligomer formation to fully developed crystals. The unprecedented spatiotemporal control of this technique unlocks new avenues for manipulating reaction pathways and exploring the vast configurational space of zeolites.European Research Council (ERC) ; TÜBİTAKPublisher versio

A Jungian psychosocial approach to entrepreneurship: The case of woman entrepreneurs in Turkey

Purpose - The relationship between feminine and masculine qualities is usually seen as a hierarchy and dichotomy, and what affects people's choices of these qualities remain largely unanswered. Through this study, we aim to elucidate variations in women entrepreneurs' entrepreneurial behaviour and definitions of success by using the Jungian psychosocial framework. Design/methodology/approach - Through 28 semi-structured in-depth interviews, we investigated female entrepreneurs' entrepreneurial behaviour in Turkey's unique, non-western, developing-economy context, surrounded by mixed cultural values melding East and West. Findings - In brief, we found that women entrepreneurs, being greatly affected by their psychosocial contexts, use different archetypal masculine and feminine qualities with various degrees during their entrepreneurial journeys. Thus, entrepreneurial behaviour results from deliberate choices of archetypal masculine and feminine qualities existing on a continuum and shaped by the specific psychosocial context of the individual entrepreneur. Moreover, the choices of different archetypal qualities play a significant motivational role in the construction of entrepreneurs' definitions of success, which seems to align with the individuation phenomenon Jung described as the life purpose of every individual. Originality/value - The Jungian framework we introduce to the field offers an alternative, yet comprehensive and enriching solution, to the problematic dichotomy of the qualities underlying entrepreneurship behaviour and offers a solid theoretical base in expanding the definition of success

The rubber tool illusion reveals how body image modifies body schema

Rubber hand illusion and tool-use paradigms have been extensively used to investigate body representation. Although both approaches rely on multisensory integration and external object incorporation, they are typically studied in isolation. Here, we introduce a novel paradigm that combines these methods to investigate whether perceptual modifications to body representation can induce motor changes, and vice versa. First, participants completed a tool-use task, actively using a short or long grabber tool to move cubes. When asked to point toward the forearm midpoint, only long tool users exhibited a distal shift, denoting an expansion in motor representation. Next, participants experienced the "rubber tool illusion" by passively holding the same tool while observing a rubber hand grasp an identical-looking tool. Notably, participants holding a short tool exhibited an expanded forearm representation when they observed a synchronously stroked long tool during illusion. Control experiments revealed that this effect depended on prior active tool use, embodiment of the observed rubber hand/tool, and a length mismatch between the held and observed tools. These findings reveal for the first time that motor representation of forearm length, a component of body schema, can be modulated by changes in body image. Public Significance Statement Over the past 25 years, research on how the brain represents the body has identified (at least) two distinct systems: body image, which governs conscious perception, and body schema, which guides unconscious movement. While body schema is known to influence body image, evidence for the reverse has been limited. This study provides new evidence that changes in body image can, in fact, alter body schema. By combining two classical methods for studying the embodiment of external objects-tool use and the rubber hand illusion-we found that merely perceiving a longer tool as part of the body had a similar effect on unconscious motor responses as actively using it. These findings challenge traditional views by showing that conscious body perception can shape unconscious movement.TÜBİTAK ; Bogazici Universit

The Turkish Constitutional Court’s struggle with the European human rights law: An evaluation of the court’s case-law on the crime of ‘Defamation against the President’ in light of the jurisprudence of the European Court of Human Rights

This paper evaluates the Turkish Constitutional Court's norm review and individual application decisions concerning Article 299 of the Turkish Penal Code containing the crime of 'Defamation against the President'. The evaluation is conducted within the context of international human rights law, specifically on the European Court of Human Rights' jurisprudence on crimes that protect heads of state. While the Turkish Constitutional Court did not see an existential problem with Article 299, this paper argues that the Court overlooks significant issues regarding the provision's legality, purpose and proportionality. The view presented is that the Constitutional Court's open disregard of the European Court of Human Rights' judgments, even when these judgments specifically focus on the Turkish crime of 'Defamation against the President' is an example of judicial restraint in which the Court refrains from contesting the President's standing in the current political setting. According to this paper, such a stance cannot be taken, especially in light of the problems of the provision, and the Court should acknowledge that the only way to protect the freedom of expression effectively is to get rid of Article 299

From managers to employees to customers: The hidden toll of technology-induced workload

Retailers like Walmart, Target, and Home Depot have adopted Enterprise Resource Planning (ERP), leading to cost savings and efficient inventory and supply chain management. However, some companies, such as Nike, Waste Management, and Lidl, have faced challenges in transitioning from old to new systems, marked by changes in employee behavior, increased workload, and rising stress levels. Although extant literature focuses on employees' technology-induced workload, limited insight exists into whether and how such workload transpired by ERP is transmitted from managers to employees and the implications on customer service. To address these gaps, we draw on the conservation of resources theory, utilizing multilevel and multirespondent data collected during the initial phases of ERP implementation in retail stores. We find an indirect crossover effect of technology-induced workload from managers to employees, mediated through manager close monitoring, and an indirect effect of manager technology-induced workload on customer-directed sabotage, serially mediated by manager close monitoring and employee technology-induced workload. Furthermore, surface acting amplifies the impact of employee technology-induced workload on customer-directed sabotage. The study contributes to the discourse between technology-induced workload as a technology-related stressor and customer service, two areas that have evolved in parallel fashion without much cross-pollination

Integrating user needs with collection mapping: A definitive case study of Özyeği̇n University Library

In this study, the collection mapping method aims to evaluate the efficiency and adequacy of Özyeğin University Library's collection. Collection mapping has revealed to what extent the collections align with academic programs and changing user profiles. In recent years, user profiles in university libraries have undergone significant changes. This study aims to address this need while increasing the collection's visibility. Search in the LC web Classification. The Library of Congress Classification System is used in the collection mapping process. All classification numbers from A to Z were scanned using the LC Classification Search. Additionally, based on the faculties of Ozyeğin University, currency, and subject distribution were analysed, and strengths and areas for improvement were identified. The collection scope was limited to printed books and ebooks accessed through the ownership model. This study provides quantitative evidence on faculty course content, addressing user needs and academic expectations

Multiple item economic lot sizing problem with inventory dependent demand

We consider a multiple item Economic Lot Sizing problem where the demands for items depend on their stock quantities. The objective is to find a production plan such that the resulting stock levels (and hence demands) maximize total profit over a finite planning horizon. The single item version of this problem has been studied in the literature, and a polynomial time algorithm has been proposed when there are no bounds on production. It has also been proven that the single item version is NP-hard even when there are constant (i.e., time-invariant) finite capacities on production. We extend this single item model by considering multiple items and production capacities. We propose a Lagrangian relaxation method to find an initial solution to the problem. This solution is a hybrid solution obtained by combining two distinct solutions generated in the process of solving the Lagrangian dual problem. Starting with this initial solution, we then implement a Tabu Search algorithm to find better solutions. The performance of the proposed solution method is compared with the performance of a standard commercial software that works on a mixed integer programming formulation of the problem. We show that our solution approach finds better solutions within a predetermined time limit in general.TÜBİTAKPublisher versio

A robust and gain-free direct model predictive control for nine-level t-type converter

Model predictive control (MPC) is a powerful strategy for tackling multiobjective control challenges, but it often involves a laborious process of tuning weighting factors. This article proposes a gain-free MPC method for a recently developed nine-level T-type converter (9L-T-2C), which offers advantages over traditional topologies, such as fewer components and improved efficiency. Drawing inspiration from Lyapunov's theory, this method avoids the use of weighting factors while effectively handling three targets, including current tracking, balancing of flying capacitors (FCs), and regulation of the neutral point (NP). Comparable with the traditional finite-control-set MPC (FCS-MPC), the proposed controller demonstrates high performance concerning all objectives. Additionally, it showcases superior resilience against model uncertainties when compared with the traditional approach. Experimental validation of the proposed MPC method is conducted in grid-connected operation under several conditions. The proposed method is subjected to a comparative analysis via the experimental implementation, where it is compared with a proportional-resonant (PR) controller and other state-of-the- art MPC methods. This analysis reveals the advantages of the proposed method, including eliminating the need for gains or weighting factors, improved robustness, and effective control of the FCs.Deutscher Akademischer Austauschdienst ; German Academic Exchange Service ; Technische Universität München ; Agencia Nacional de Investigación y Desarrollo ; Agencia Nacional de Investigación y Desarroll

Through-the-thickness investigation of grain structure and microhardness of ni-based and mg-based laminated composites for dental applications

Nowadays, metal-based composites are utilized in medical applications such as dental implant, oral surgery, and dentistry. This work looks into the evolution of grain structure and hardness of Ni and Mg layers from the surface to the center of Ni-based and Mg-based laminated composites processed by eight cycles of accumulative roll bonding (ARB) technique. The findings showed a gradual decrease in grain size from the surface to the center of composites. Moreover, the lowest grain sizes of Ni and Mg were obtained when they were in the matrix of composites that were closer to rollers. Also, the hardness of layers grew by increasing the cycles. The layers closer to the surface of composites showed higher hardness. Nonetheless, the variations of hardness values were also observed because of the slicing and re-stacking of composites prior to each cycle

Correction: ProbC: Joint modeling of epigenome and transcriptome effects in 3D genome

Following publication of the original article it was reported there was a missing declaration of funding in the Funding declaration. The updated Funding declaration with the newly added text in bold is given below. Ozyegin University Research Grant. This research was funded by TUBITAK (Scientific and Technological Research Council of Turkey) 3501 Project with grant number 122E706. The original article has been updated.TÜBİTAKPublisher versio