https://hdl.handle.net/20.500.14124/6546 Open Access Articles Wed, 22 Apr 2026 00:55:16 GMT 2026-04-22T00:55:16Z https://hdl.handle.net/20.500.14124/10831 Development of an effective preconcentration strategy for the trace determination of nickel in thyme tea extracts by FeSbO4 nanoparticle-based dispersive solid phase extraction (DSPE) Büyük, Muhammed Ali; Serbest, Hakan; Bakırdere, Sezgin In the present study, an accurate, rapid and green analytical method based on FeSbO4 nanoparticle-assisted dispersive solid phase extraction (DSPE) was developed to determine trace levels of nickel (Ni) by flame atomic absorption spectrophotometry (FAAS). The fabrication of the FeSbO4 nanoparticles was achieved under hydrothermal synthesis conditions and utilized for the first time as sorbent materials for the preconcentration/separation of Ni ions. A univariate optimization approach was applied to determine the optimal conditions for the extraction parameters. Under the optimal conditions, the limit of detection and the dynamic linear range were found to be 0.81 µg L-1 and between 4.0 and 40 µg L-1, respectively. The sensitivity of FAAS was improved by 137.8-fold. Thyme tea samples were spiked to assess the applicability of FeSbO4-DSPE-FAAS, and the percent recovery results between 84.8% and 120.6% obtained with the matrix matching calibration strategy demonstrated that the developed method is feasible for determining nickel ions in thyme tea and similar matrices with high accuracy. The Eco-Scale index was evaluated to determine the greenness of the developed preconcentration protocol, and a net score of 88 was calculated, indicating excellent environmental characteristics. Thu, 01 Jan 2026 00:00:00 GMT https://hdl.handle.net/20.500.14124/10831 2026-01-01T00:00:00Z https://hdl.handle.net/20.500.14124/10745 An Analysis of User Experience Based on Physical Environmental Components in VR-Supported Educational Spaces Using a Mixed-Methods Approach Kurtuluş, Minel; Tekin, Çiğdem Background: Virtual reality (VR) technology offers an innovative learning environment that enriches user experience in education. However, there is limited research on the impact of physical environmental components within VR-supported educational spaces on user perception and satisfaction. Objectives: This study aims to evaluate user experience and satisfaction levels in VR-supported educational environments through a mixed-methods approach, focusing on the influence of physical environmental components. Methodology/Approach: Four distinct VR platforms (Mozilla Hubs, Engage, Meta Horizon, and MeetinVR) were selected as experimental settings. Twenty participants, comprising ten interior architecture students and ten faculty members from Istanbul Gelisim University, received orientation sessions to familiarize themselves with the VR equipment and platforms. Each participant engaged in 10-minute sessions on each platform, experiencing four different virtual environments in total. Following each session, participants completed structured experience questionnaires and open-ended feedback forms addressing physical environmental elements such as material, texture, lighting, form, color, size, and scale. The collected data were analyzed using IBM SPSS and MAXQDA software. Findings and Discussion: The results demonstrate that the design elements of VR-based learning spaces have a direct effect on user perception and satisfaction. In particular, material, lighting, and scale components play a significant role in enhancing users' sense of realism and educational effectiveness. The study offers practical recommendations for the user-centered design of VRsupported educational environments, contributing to the advancement of virtual learning spaces within interior architecture education. Thu, 01 Jan 2026 00:00:00 GMT https://hdl.handle.net/20.500.14124/10745 2026-01-01T00:00:00Z https://hdl.handle.net/20.500.14124/10744 Constructing National Identity Through Museums in Early Republican Turkey: Historical Narrative, Spatial Transformation, Exhibiting Modernity, and Monumentality Atalay Şimşek, Duygu This article examines the role of museums in the construction of national identity during the Early Republican Period in Turkey (1923-1950). Drawing on theoretical approaches that interpret museums as spaces in which collective memory and national identity are materially organized and publicly communicated, the study analyzes museums as key sites through which the ideological foundations of the new nation-state were articulated. The study adopts a qualitative historical approach based on document analysis of representative primary and secondary sources and proposes an analytical interpretation derived from a comparative reading of museum practices and institutional transformations. Its principal original contribution lies in identifying four operational analytical categories: historical narrative, spatial transformation, exhibiting modernity, and monumentality that clarify the structural functions of museums in the nation-building process. Museums are interpreted as spaces through which national identity was constructed along several interconnected dimensions. First, museums functioned as spaces of national memory in which a newly constructed historical narrative was materialized and communicated. Second, the transformation of Ottoman palaces and religious environments into museums symbolized the political and ideological rupture between empire and republic. Third, museums contributed to the dissemination of painting and sculpture as visible expressions of modernization. Finally, museums acquired monumental meanings and functioned as symbolic environments representing the founding leaders and ideals of the Republic. Taken together, these dimensions demonstrate how museums functioned as key cultural spaces through which national identity was structured and communicated in the Early Republican state. Thu, 01 Jan 2026 00:00:00 GMT https://hdl.handle.net/20.500.14124/10744 2026-01-01T00:00:00Z https://hdl.handle.net/20.500.14124/10740 Tümevarım Yöntemiyle Yazılmış Yabancılara Türkçe Öğretimi Kitabı: Inductive Turkish Lessons Işık, Halil İbrahim “Inductive Turkish Lessons” Fred Field Goodsell tarafindan yazılmış ve American Board tarafindan Harf Devrimi’nden bir yıl önce 1927 yılında İstanbul’da yayımlanmıştır. Kitabın yazılış amacı ana dili İngilizce olan kişilere Türkçeyi öğretmektir. Bu çalışmanın gayesi yazar ve eser hakkında bilgi vermenin yanı sıra kitapta uygulanan yöntem ve yöntemin nasıl uygulandığı üzerinde durmaktır. Yeri geldiğinde de günümüzde yabancılara Türkçe öğretiminde en çok bilinen ve kullanılan “İstanbul Yabancılar İçin Türkçe Ders Kitabı” ve “Hitit Yabancılar İçin Türkçe Ders Kitabı” serileri ile karşılaştırma yapılacaktır. Tümevarım yönteminin uygulandığı ve 144 sayfadan oluşan kitapta 60 ders bulunmaktadır. Dersler şu şekilde anlatılmaktadır: Kitabın sol sayfasında dersin başlığı ve örnek cümleler verilir, sayfanın altında ise kural öğretilir. Sol sayfada kullanılan dil tamamen İngilizcedir. Sağ sayfada ise verilen İngilizce örnek cümlelerin Osmanlı Türkçesi ile yazılmış Türkçe karşılıkları bulunmaktadır. Inductive Turkish Lessons kitabında dikkat çeken noktalardan biri hem İngilizceTürkçe, Türkçe-İngilizce sözlüğe hem de dil bilgisi terimleri sözlüğüne sahip olmasıdır. Sözlük bölümündeki Türkçe kelimeler de Osmanlı Türkçesi ile yazılmıştır. Eserde dil bilgisi öğretimi yapılmakla beraber Türkçe öğrenen yabancıların okuma becerisini geliştirmeye yönelik okuma dersleri de mevcuttur. Günümüzde yabancılara Türkçe öğretimi kitaplarında edebî metinlerden de faydalanılmaktadır. Inductive Turkish Lessons kitabında da şiir, hikâye ve mektup gibi edebî metinler kullanılmıştır. Edebî metinler kullanılırken yine kitabın sol tarafinda İngilizce hâli sağ tarafinda ise Türkçe hâli verilmiştir Wed, 01 Jan 2025 00:00:00 GMT https://hdl.handle.net/20.500.14124/10740 2025-01-01T00:00:00Z