University of Palangka Raya

Monitoring of aquatic environments contaminated with heavy metals requires rapid, selective, and sensitive analytical methods. This study reports the development of a novel paper-based colorimetric sensor utilising silver nanoparticles (AgNPs) synthesised via a green route and stabilised by beta-Cyclodextrin (beta-CDs). The AgNPs were synthesised under optimised conditions (1.5 & times; 10-4 M AgNO3, 5.0 & times; 10-3 M beta-CDs, and pH 12) and adsorbed onto a paper substrate. The synthesised nanomaterials were characterised using UV-Visible (UV-Vis) spectrophotometry, Fourier-transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), field emission scanning electron microscopy with energy-dispersive X-ray analysis (FESEM-EDX), particle size analysis (PSA), and zeta potential analysis. The AgNPs exhibited a maximum absorbance at 407 nm, spherical morphology with diameters of 17.06-29.5 nm, and a zeta potential of -15.5 +/- 0.1 mV, indicating moderate colloidal stability. The developed sensor demonstrated rapid and highly selective detection of Pd2+ ions within 10 minutes, driven by an aggregation-induced colorimetric transition from yellowish-orange to greyish-white. Digital image analysis of red, green, and blue (RGB) intensities revealed a strong linear correlation (R2 = 0.9994) within the optimal working range of 1-5 ppm, achieving low limits of detection (0.11 ppm) and quantification (0.38 ppm). Furthermore, application to real lake water samples confirmed excellent recovery and precision, consistent with Inductively Coupled Plasma Mass Spectrometry (ICP-MS) validation. This simple, selective, and low-cost sensor demonstrates strong potential for sustainable, on-site monitoring of Pd2+ contamination in aquatic systems.

IntroductionThis study investigated the effectiveness of multimedia resources integrated with local cultural content in teaching English narrative texts to Indonesian EFL students. The study aimed to examine whether multimedia materials based on local folk stories could enhance students' reading comprehension, understanding of narrative elements, and engagement in learning.MethodsThe study employed a one-group pre-test-post-test quasi-experimental design supported by a descriptive survey. The participants were 40 ninth-grade students aged 14-15 from a public secondary school in Indonesia. The intervention utilized videos and e-books containing local cultural narratives. Data were collected through a reading comprehension test, a narrative element comprehension test, and a 15-item Likert-scale questionnaire measuring engagement in terms of attitudes, interest, and motivation. The pre-test and post-test scores were analyzed using paired-samples t-tests, while the questionnaire data were analyzed descriptively.ResultsThe findings revealed significant improvements in students' reading comprehension, which increased from the pre-test (M = 84.03, SD = 2.96) to the posttest (M = 86.83, SD = 3.45), t(39) = 4.914, p < .001, Cohen's dz = 0.78. Students' understanding of narrative elements also improved significantly from the pre-test (M = 82.65, SD = 4.15) to the post-test (M = 84.95, SD = 5.81), t(39) = 3.269, p = .002, Cohen's dz = 0.52. In addition, the questionnaire results demonstrated positive learner engagement, with mean scores of 3.98 for attitudes, 3.89 for interest, and 3.72 for motivation.DiscussionThe findings suggest that multimedia resources enriched with local cultural content can effectively support both cognitive and affective dimensions of EFL narrative learning. The integration of multimedia learning and culturally responsive pedagogy contributed to improved comprehension, narrative understanding, and learner engagement. This study provides pedagogical implications for EFL teachers seeking to incorporate culturally meaningful multimedia resources into narrative text instruction.

Pengelolaan urusan pemerintahan konkuren merupakan salah satu pilar utama dalam penyelenggaraan desentralisasi dan otonomi daerah di Indonesia. Pembagian urusan antara pemerintah pusat dan pemerintah daerah diharapkan mampu mendorong efektivitas penyelenggaraan pemerintahan serta meningkatkan kualitas pelayanan publik sesuai dengan prinsip Good Governance. Namun dalam praktiknya pengelolaan urusan konkuren masih menghadapi berbagai permasalahan normatif dan administratif yang berimplikasi pada rendahnya akuntabilitas transparansi dan kepastian hukum. Penelitian ini bertujuan untuk menganalisis pengaturan normatif urusan pemerintahan konkuren dalam sistem ketatanegaraan Indonesia serta melakukan evaluasi normatif terhadap pengelolaannya oleh pemerintah daerah dalam mewujudkan Good Governance. Penelitian ini menggunakan metode penelitian hukum normatif dengan pendekatan perundang undangan dan konseptual. Hasil penelitian menunjukkan bahwa meskipun pengaturan urusan konkuren telah diatur secara komprehensif dalam peraturan perundang undangan masih terdapat ketidaksinkronan dan tumpang tindih kewenangan yang menghambat efektivitas penyelenggaraan pemerintahan daerah. Selain itu penerapan prinsip Good Governance dalam pengelolaan urusan konkuren belum optimal akibat keterbatasan kapasitas kelembagaan lemahnya mekanisme pengawasan serta kurangnya partisipasi publik yang substantif. Penelitian ini merekomendasikan perlunya harmonisasi regulasi penguatan kapasitas pemerintah daerah serta optimalisasi fungsi pembinaan dan pengawasan sebagai langkah strategis untuk mewujudkan pengelolaan urusan pemerintahan konkuren yang akuntabel transparan dan berkeadilan.

This article examines the transformation of the Dayak Customary Council (DAD) in Central Kalimantan in the post-Reformasi decentralisation era using institutional isomorphism. It argues that DAD's change is shaped by coercive pressures from regional regulations, mimetic pressures from state bureaucracy and market governance, and normative pressures from Dayak cultural values. Rather than producing uniformity, these pressures generate institutional hybridity that strengthens Dayak political representation. At the same time, this hybridity creates tensions, including elite co-optation, dependence on capital, gender asymmetry and the narrowing of customary values. The study extends institutional isomorphism theory by highlighting hybridity as a negotiated governance outcome.

Kepemimpinan transformasional berpengaruh terhadap kinerja karyawan dan mutu layanan perguruan tinggi, namun konsistensi temuan empiris menunjukkan variasi yang dipengaruhi kompleksitas mekanisme psikologis, organisasional, dan kontekstual, sehingga keterbatasan model linier dalam menjelaskan fenomena tersebut semakin nyata. Penelitian ini bertujuan menganalisis dan mensintesis berbagai temuan empiris dan teoritis untuk merumuskan model konseptual integratif yang menjelaskan pengaruh kepemimpinan transformasional terhadap kinerja karyawan dan mutu layanan di perguruan tinggi. Penelitian ini menggunakan pendekatan kajian pustaka (literature-based study) melalui sintesis tematik terhadap studi empiris dan konseptual yang relevan dalam bidang kepemimpinan, kinerja, dan manajemen mutu pendidikan tinggi. Hasil kajian menunjukkan bahwa pengaruh kepemimpinan transformasional tidak bersifat langsung, melainkan dimediasi oleh motivasi intrinsik, kepuasan kerja, pemberdayaan psikologis, self-efficacy kreatif, kepercayaan, dan berbagi pengetahuan, serta diperkuat oleh iklim inovasi dan orientasi belajar. Selain itu, keadilan organisasional berfungsi sebagai moderator kunci yang menentukan arah dan kekuatan pengaruh tersebut. Kinerja karyawan tidak hanya berperan sebagai output, tetapi juga sebagai mekanisme umpan balik yang memperkuat keberlanjutan kepemimpinan dan berkontribusi pada peningkatan mutu layanan secara sistemik dan berkelanjutan. Oleh karena itu, diperlukan model integratif psikologis–organisasional yang mampu menangkap kompleksitas relasi kepemimpinan, kinerja, dan mutu layanan. Kepemimpinan transformasional tidak dapat dipahami secara linier, melainkan sebagai sistem penggerak multilevel yang dinamis, kontekstual, dan adaptif terhadap perubahan ekosistem pendidikan tinggi yang terus berkembang.