bluuebunny/crossref_metadata_2025 huggingface dataset:
On Numerical Ranges and Spectra of Norm Attaining Operators in C*-Algebras
Authors: Omaoro Sabasi , Okelo Benard , Ongati Omolo
Published: August 2023

In this paper, we study norm attaining operators in C∗-algebras. We characterize their numerical ranges and spectra. In particular, we show that if a norm-attaining operator S is self-adjoint, then its spectrum lies in the interval [−||S||, ||S||].
Analisis Campuran Etanol Dan Gasolin Mobil 92r Terhadap Emisi Gas Buang Pada Motor 4 Tak
Authors: Nur Nanang M , Pratiwi Yeni Ratih
Published: August 2023

Perkembangan teknologi dari era ke era semakin pesat, semakin meningkat pula kebutuhan manusia akan kendaraan untuk transportasi, Sehingga meningkatnya polusi yang di sebabkan oleh asap kendaraan  Polusi akibat Emisi gas buang hasil pembakaran kendaraan bermotor yang berupa karbondioksida (CO2), karbonmonoksida (CO), Oksida Nitrogen (Nox), hidrokarbon yang tidak terbakar, serta unsur metalik seperti timbal (Pb) menjadi perhatian serius karena dampak kinerja gas tersebut yang dapat menurunkan tingkat kesehatan dan mencemari lingkungan, Penurunan emisi gas buang dapat di lakukan dengan mengembangkan bahan bakar alternatif yang ramah lingkungan. Dalam penelitian ini di lakukan pengujian campuran gasoline mobil 92r dan etanol, penelitian ini merupakan penelitian deskriptif kuantitatif dengan metode experiment yang membandingkan hasil satu dengan hasil lainnya untuk mengetahui emisi gas buang dan konsumsi bahan bakar, kemudian di uji menggunakan motor megapro 160 cc tahun 2004, dan gas analyzer untuk mengetahui emisi gas buang, hasil dari penelitian ini menunjukan bahwa campuran bahan bakar terendah pada campuran E-30 dengan nilai 415 ppm untuk gas HC, E-30 04.18 % untuk gas Co, E-20 dengan nilai 0.0399 ml/s untuk konsumsi bahan bakar.
ANALISIS NILAI DRL PARAMETER ESAK/INAK PEMERIKSAAN THORAX AP/PA X-RAY CANON
Authors: Khoirot Reni Muasisatul , Hakim Muhammad Helmi , Alam Yuniar , Ananingtyas Ratika Sekar Ajeng
Published: August 2023

DRL (Diagnostic Reference Level), merupakan suatu alat bantu sebagai alat optimasi untuk melindungi pasien dari radiasi guna mencegah paparan radiasi yang berlebihan pada pasien. DRL juga diterapkan pada modalitas  radiografi umum pemeriksaan Thorax AP (Anterior-Posterior)/PA. Penelitian ini bertujuan untuk menentukan dan menganalisiss nilai DRL yang sesuai dengan aturan BAPETEN yang bermanfaat sebagai referensi pada pemeriksaan radiografi umum. Menggunakan data sekunder untuk mengetahui cara menentukan nilai DRL  (Diagnostic Reference Level), pada parameter INAK  (Incident Air Kerma) dan ESAK (Entrance Surface Air Kerma.) Menghitung nilai kuartil ketiga untuk DRL lokal dengan DRL yang sesuai dengan acuan BAPETEN. Hasil penelitian ini menunjukkan nilai DRL pada parameter INAK 0,22 mGy dan ESAK 0,32 mGy. Nilai dosis yang diterima pasien pada pemeriksaan thorax AP/PA salah satu instalasi rumah sakit di Srengat berada ditingkat aman dimana nilai dosis lebih kecil dari ambang batas yang telah ditetapkan oleh BAPETEN.
TÜRKMEN TÜKÇESİ VE TÜRKİYE TÜRKÇESİNDE AT İLE İLGİLİ ATASÖZLERİ
Authors: ÖZDEMİR Ahmet
Published: August 2023

At, insanlık tarihi boyunca gerek ulaşım aracı olarak gerekse sadakat, güç ve özgürlüğün sembolü olarak önemli bir yer tutmuş hayvanlardan biridir. Türklerle at arasında ilişki çok eski dönemlere dayanır. Atın evcilleştirme süreci ile başlayan bu ilişki aynı zamanda kültürel, sosyal ve edebi bir mirasın da temelini oluşturmuştur. At, Türkler için sadece bir hayvan değil, adeta bir dost, bir yol arkadaşı olmuş, Türk kültür ve edebiyatında önemli bir rol oynamıştır. At ile ilgili atasözleri, Türk halkının atla olan duygusal bağını ve ona verilen değeri anlatırken aynı zamanda toplumsal normları, değerleri ve ahlaki öğretileri de yansıtmaktadır. Atasözleri, sözlü halk kültürünün en önemli unsurlarından biri olarak, Türk halkının ortak hafızasını yansıtan veciz ifadelerdir. Atasözleri, sadece dilin zenginliğini ve estetik gücünü değil, aynı zamanda toplumun düşünce yapısını, değerlerini ve hayata bakış açısını yansıtır. Sözlü kültür geleneğimize baktığımızda atasözlerinin bu gelenek içerisinde önemli bir yer kapladığını ve sosyal hayatta etkili bir şekilde kullanılmaya devam ettiğini görürüz. Bu çalışmada, Türk kültür ve edebiyatında önemli yeri “at” ve “atasözleri” ele alınmış, çalışmanın zenginleşmesi adına Türkiye Türkçesindeki atasözleriyle birlikte Türkmen Türkçesindeki atasözleri de incelenmiştir. At ile ilgili bu atasözleri incelenirken Anadolu’da yaşayan Türkler ile Türkmenler arasındaki kültürel birlikteliğin ne derece aktif olduğu bu atasözleri bağlamında tespit edilmek istenmiştir. At ile ilgili atasözleri üzerine yapılan bu araştırma sonucunda iki toplum arasında kültürel birlikteliğin ileri düzeyde olduğu, atasözlerinin ve atın her iki toplumun sosyal hayatında önemli bir yer edindiği tespit edilmiştir.
Development of Liveworksheets-Based Electronic Student Worksheets (E-LKPD) to Improve Science Learning Outcomes
Authors: Ghaisani Nabeella Rachma Tika , Setyasto Novi
Published: August 2023

The lack of use of Student Worksheets (known with LKPD) at SDN Demaan has an impact on student learning outcomes. This research is Research and Development which refers to the Borg and Gall model. This study aims to develop and test the feasibility, practicality, and effectiveness of liveworksheet-based E-LKPD. The population in this study amounted to 30 with 8 small-scale test subjects in VB class students and 22 large-scale test subjects in VA class SD Negeri Demaan. Data collection techniques used test techniques (pretest-posttest) and non-tests in the form of observations, questionnaires, interview results, and document data. The validation results by the material, media, and language expert validators show that the liveworksheet-based E-LKPD has met the valid criteria. Based on the results of the pretest-posttest, it is known that the E-LKPD based on liveworksheets is effective for improving student learning outcomes as indicated by the results of an increase in the average pretest score by 57 to, and 84 during the posttest and the n gain test results obtained  gain value of 0 .62 in the medium category. Based on the results of the response questionnaire that was distributed, a very positive response was obtained from teachers and students. From these results, it can be concluded that the E-LKPD based on liveworksheets is effective for improving science learning outcomes and is feasible and practical to use in the learning of class V students at SD Negeri Demaan.
Persepsi Mahasiswi Fakultas Ilmu Komunikasi Angkatan 2019 tentang Peraturan Rektor Penggunaan Busana Islami di Lingkungan Universitas Islam Bandung
Authors: Aliyah Ruhiyatul , Khuz'ai Rodliyah , Kamil Parihat
Published: August 2023

Abstract. Referring to the Chancellor's regulation no: 252/F.04/REK/VI/2022 concerning the use of Islamic clothing for students in the Unisba Campus environment. It also departs from the reality of female students who take off their headscarves while on campus. So that is the background for the authors to be interested in knowing how their perceptions of the regulations for the use of Islamic clothing at Unisba. The research object is the 2019 batch of students at the Faculty of Communication Sciences. Using qualitative research with the theory of perception. Data collection techniques through observation, interviews and documentation.The results of the study show that female students of the Faculty of Communication Studies understand how to dress in Islam. However, their perceptions of these regulations varied, some female students considered these regulations appropriate and appropriate for Islamic tertiary institutions. but there are also female students who think that this regulation is a form of coercion or a formality that must be carried out as a student at Unisba. Opportunities are seen from the Chancellor who supports the implementation of this regulation. Challenges include student awareness of implementing regulations, dissemination of the contents of regulations, and the lack of officers who control the implementation of regulations.

Abstrak. Mengacu pada peraturan Rektor no: 252/F.04/REK/VI/2022 tentang penggunaan busana Islami bagi mahasiswa di lingkungan Kampus Unisba. Juga berangkat dari realita mahasiswi yang melepas pasang kerudungnya selama berada di lingkungan kampus. Sehingga melatarbelakangi penulis untuk tertarik mengetahui bagaimana persepsi mereka terhadap peraturan penggunaan busana Islami di Unisba. Objek penelitian yaitu mahasiswi Fakultas Ilmu Komunikasi angkatan 2019. Menggunakan penelitian kualitatif dengan teori persepsi. Teknik pengumpulan data melalui observasi, wawancara dan dokumentasi.Hasil penelitian menunjukan, mahasiswi fakultas Ilmu Komunikasi memahami cara berbusana dalam Islam. Namun persepsi mereka terhadap peraturan ini beragam, beberapa mahasiswi menganggap peraturan ini sesuai dan sudah seharusnya bagi perguruan tinggi Islam. tapi ada pula mahasiswi yang menganggap bahwa peraturan ini merupakan bentuk paksaan atau formalitas yang harus dilaksanakan sebagai seorang mahasiswa di Unisba. Peluang terlihat dari Rektor yang mendukung terlaksananya peraturan ini. Tantangan meliputi, kesadaran mahasiswa menjalankan peraturan, sosialisasi isi pertaturan, dan kurang nya petugas yang mengontrol jalannya peraturan.
Nilai-Nilai Dakwah pada Kesenian Kuda Lumping Puja Lestari di Desa Kesuma Riau
Authors: Ramdan Fauzi  , Ida Afidah  , Asep Ahmad Siddiq
Published: August 2023

Abstract. This research focuses on the da'wah values ​​of the sustainable lumping puja horse art in Kusuma village. Art at the time of the saints became a medium of propaganda, including the art of lumping horses. The sustainable puja lumping horse art has the intention that lumping horse art can become one of the propaganda media as done by the trustees. Where in the sustainable lumping puja horse art there are da'wah values ​​in the implementation of sustainable lumping puja horse art. This study uses a type of qualitative research with descriptive analysis method. By collecting data in the form of interviews, observation and documentation. Where researchers go directly to the community to get data. In the results of the study it was found that the sustainable lumping puja horse art has missionary values. What is contained in the poetry of tombo ati and poetry of lir ilir in its implementation which has a good meaning and the meaning of every sustainable lumping puja horse dance movement which contains the value of da'wah.

Abstrak. Penelitian ini berfokus pada nilai-nilai dakwah kesenian kuda lumping puja lestari di desa Kusuma. Kesenian di zaman para wali menjadi salah satu media dakwah, termasuk seni kuda lumping. Seni kuda lumping puja lestari memiliki niat untuk seni kuda lumping dapat menjadi salah satu media dakwah sebgaimana yang dilakukan oleh para wali. Dimana pada kesenian kuda lumping puja lestari terdapat nilai-nilai dakwah dalam pelaksanan seni kuda lumping puja lestari. Penelitian ini menggunakan jenis penelitian kualitatif dengan metode deskriptif analisis. Dengan pengumpulan data berupa wawancara,observasi dan dokumentasi. Dimana peneliti langsung turun ke masyarakat untuk mendapatkan data.  Pada hasil penelitian didapati bahwa seni kuda lumping puja lestari terdapat nilai-nilai dakwah. Yang terdapat pada syair tombo ati dan syair lir ilir dalam pelaksaan nya yang memiliki makna baik  serta makna dari setiap gerak tari kuda lumping puja lestari yang mengandung nilai dakwah.
Analisis Undang-Undang Nomor 41 Tahun 2004 Tentang Wakaf Terkait Penyelesaian Sengketa Tanah Wakaf Sawah Di Sindangwargi Kecamatan Cipongkor Kabupaten Bandung Barat
Authors: ROSIDAH AI , Shindu Irwansayh  , Yandi Maryandi
Published: August 2023

This dispute occurred because the wakif did not have children which resulted in many people taking the opportunity to control it and the implementation of the waqf pledge which was only carried out verbally, so that there was no certificate of waqf land to be used as legal force because the land was carried out long before there was independence which resulted in the waqf not being recorded at the KUA. The purpose of this study was to find out the analysis of law number 41 of 2004 concerning waqf related to the settlement of waqf rice field land disputes in Sindangwargi, Cipongkor District, West Bandung Regency.This research method is qualitative descriptive to analyze related endowments and disputes that occur, using an empirical juridical research approach and this research is a Field Research study, where the data sources used are primary and secondary data.The results of this study indicate that the dispute resolution efforts undertaken by the KUA to resolve this dispute are deliberations, mediation between the two parties at the Cimahi Police Chief, and arbitration by the BPN at the Cimahi Police Chief. It can be concluded that the KUA's efforts in Cipongkor in resolving the waqf rice field land dispute in Sindangwargi, Baranangsiang Village, Kec. Cipongkor Kab. West Bandung is in accordance with Law Number 41 of 2004.

Abstrak. Persengketaan ini terjadi karena wakif tidak memiliki keturunan yang mengakibatkan banyak orang mengambil kesempatan untuk menguasainya dan pelaksanaan  ikrar wakaf yang hanya dilakukan secara lisan, sehingga belum ada sertifikat tanah wakaf untuk dijadikan kekuatan hukum sebab tanah tersebut dilakukan jauh sebelum adanya kemerdekaan yang mengakibatkan wakaf tersebut tidak tercatat  di KUA. Tujuan penelitian ini untuk mengetahui analisis undang-undang nomor 41 tahun 2004 tentang wakaf terkait penyelesaian persengketaan tanah wakaf sawah di Sindangwargi Kecamatan Cipongkor Kabupaten Bandung Barat.Metode penelitian ini bersifat deskriftif kualitatif untuk menganalisis terkait perwakafan dan sengketa yang terjadi, dengan menggunakan pendekatan penelitian yuridis empiris dan penelitian ini merupakan penelitian Field Research, dimana sumber data yang dipakai yaitu data primer dan sekunder. Hasil penelitian ini menunjukkan bahwa upaya penyelesaian sengketa yang dilakukan oleh pihak KUA untuk menyelesaikan sengketa ini adalah musyawarah, mediasi diantara kedua belah pihak di kapolres cimahi, dan arbitrase oleh BPN di kapolres cimahi. Dapat disimpulkan bahwa upaya KUA di Cipongkor dalam menyelesaikan persengketaan tanah wakaf sawah di Sindangwargi Desa Baranangsiang Kec. Cipongkor Kab. Bandung Barat telah sesuai dengan Undang-undang Nomor 41 Tahun 2004.
TINJAUAN UNDANG-UNDANG NOMOR 41 TENTANG WAKAF TERHADAP KEMATIAN NADZIR WAKAF DAN IMPLIKASINYA (Studi Kasus di Masjid Al-Hidayah Desa Margaasih Kecamatan Margaasih Kabupaten Bandung)
Authors: Isnaini Mubarokah
Published: August 2023

Abstrak.  Eksistensi Nadzir pada tanah wakaf sangat dibutuhkan karena merupakan salah satu rukun wakaf. Nadzir sebagai seseorang yang mengelola tanah wakaf harus diberhentikan atau digantikan apabila tidak dapat menjalankan kewajibannya dengan baik. Maka perasalahan yang dirumusakn dalam penelitian ini sebagai berikut : Bagaimana Status Kematian Nadzir pada Tanah Wakaf di Masjid Al-Hidayah Desa Margaasih Menurut Undang-Undang Nomor 41 Tahun 2004 Tentang Wakaf. Penelitian ini dilakukan dengan tujuan untuk mengetahui bagaimana status kematian nadzir terhadap pengelolaan harta benda wakaf di masjid Al-Hidayah serta untuk mengetahui Penelitian ini termasuk kepada penelitian lapangan (field Research) dan menggunakan penelitian kualitatif. Pendekatan yang digunakan yakni pendekatan yuridis empiris. Hasil dari penelitian ini adalah : Masjid Al-Hidayah belum ada penggantian Nadzir semenjak tahun 2007 hingga pada saat ini. Undang-Undang Nomor 41 Tahun 2004 Pasal 45 mengatakan bahwa seorang nadzir diberkentikan atau digantikan apabila sudah meninggal dunia, bubar atau dibubarkan, tidak menjalankan tugasnya sebagai nadzir, atas permintaan sendiri dan dijatuhi hukuman pidana.

Abstract. The existence of Nadzir on waqf land is needed because it is one of the pillars of waqf. Nadzir as someone who manages waqf land must be dismissed or replaced if he is unable to carry out his obligations properly. So the feelings formulated in this study are as follows: What is the Status of Nadzir's Death on Waqf Land in Al-Hidayah Mosque Margaasih Village According to Law Number 41 of 2004 concerning Waqf. This study was conducted with the aim of knowing how the status of nadzir death on the management of waqf property in Al-Hidayah mosque and to find out This research includes field research and uses qualitative research. The approach used is an empirical juridical approach. The results of this study are: Al-Hidayah Mosque has not replaced Nadzir since 2007 until now. Law Number 41 of 2004 Article 45 states that a nadzir is terminated or replaced when he has died, disbanded or disbanded, does not carry out his duties as a nadzir, at his own request and is sentenced to criminal punishment.
Analyzing Criteria Affecting Decision-Making Processes of Human Resource Management in the Aviation Sector - A Fuzzy Logic Approach
Authors: MIZRAK Filiz
Published: August 2023

In today's fast-paced and ever-changing business landscape, effective decision-making is paramount to achieving success and maintaining a competitive edge. This holds particularly true in the aviation sector, where Human Resource Management (HRM) plays a pivotal role in optimizing workforce performance and ensuring operational efficiency. However, HRM decision-making processes are often confronted with multifaceted challenges that encompass various criteria and encompass both objective and subjective factors. To tackle this complexity, a novel and adaptive approach is needed. In this study, we employ a Fuzzy Logic Approach to analyze the criteria influencing decision-making processes in HRM within the aviation sector, aiming to provide a comprehensive and flexible decision-support system for HRM practitioners and contribute to the sector's overall performance and success. The contribution of this study lies in its innovative application of Fuzzy Logic to HRM decision-making in the aviation sector. By capturing the inherent uncertainties and vagueness that HRM practitioners encounter, the proposed Fuzzy Logic-based model offers a more robust and context-sensitive decision-support system. Based on the Fuzzy Logic application and sensitivity analysis, the findings reveal the significance of employee satisfaction as the most influential criterion in HRM decision-making within the aviation sector. The Fuzzy Logic model demonstrated a strong positive correlation between high employee satisfaction levels and favorable HRM Decision Outcomes. This finding emphasizes the pivotal role of employee satisfaction in shaping HRM strategies and outcomes within aviation organizations.
Research Status, Problems and Direction of Soil Organic Carbon in Zoige Peat Wetland
Authors: Ma Chanhua , Xu Zhengqiang
Published: August 2023

Peatlands, as a special type of wetland, occupy only 3% of the Earth’s surface, but bear about one-third of the world’s soil carbon storage and play an important role in the global carbon cycle. The Zoige Wetland is located on the eastern edge of the Qinghai-Tibet Plateau, and its peat reserves are up to 1.9 billion tons, accounting for more than 40% of the country’s peat resources, which is an important support for China to achieve the “double carbon” goal. This paper reviews the research status and storage estimation of soil organic carbon in Zoige Wetland. The statistical results show that there is a large difference in the estimation of carbon storage in the peatland of Zoige (0.43-1.42 Pg). The reasons are mainly related to marked differences in values reported for soil densities, organic carbon levels, and accumulation rates. There are still great uncertainties in the estimation of wetland carbon stocks, and future studies should focus on reducing soil carbon sink uncertainties, climate change, the impact of permafrost melting on carbon sink functions, the impact of degraded ecosystem restoration and sink enhancement pathways, and other greenhouse gas functions. In order to accurately reveal the current situation and future trend of carbon sink in peat wetlands, a model-multi-source observation data fusion system was constructed to complement the observation shortcomings in key areas, and provide reference and support for the construction of carbon neutral ecological civilization.
Effects of environmental pollution on wildlife and human Health and novel mitigation strategies
Authors: G. Usman  , A. A. Mashood  , A. Aliyu  , K. S. Adamu  , A. Salisu  , A. K. Abdullahi  , H. K. Sheriff
Published: August 2023

Environment refers to the totality of all external factors and conditions that have an impact on a living thing's survival and growth. The effects of pollution on wildlife and human health are complex and affect many ecosystems and facets of civilization. Urbanization, industrialization, and the indiscriminate and improper use of chemicals, such as pesticides, have all accelerated environmental degradation and contamination, which has a negative impact on living things' health and created issues with residues in animal-derived foods. The impact of pollution on biotic components has been highlighted by recent developments in environmental-related toxicity in humans and animals as well as the rising frequency of chemical residue detection in food products. To solve the complex problems caused by environmental contamination, innovation and new mitigation techniques are essential. The creation and use of cutting-edge technology, such as diverse bioremediation methods, are included. In order to bring about change and promote successful mitigation methods, public participation and awareness are essential. Governments, businesses, communities, and people must work together to address the problems that environmental degradation has created. We can lessen pollution's harmful impacts on wildlife and human health, guaranteeing a healthier and more sustainable future for both the ecosystem and people, by implementing creative mitigation measures and giving sustainable practices priority.
A CRIAÇÃO E/OU FORMAÇÃO DA IDENTIDADE FEMININA NA RUPTURA DE PARADIGMAS SOCIAIS NO CONTO "O ROSTO ATRÁS DO ROSTO", DE MARINA COLASANTI
Authors: Souza Andreia Neves de , Gomes Maria Elena dos Santos
Published: August 2023

Relativa ao mundo externo, as literaturas infantil e juvenil aprimoram e ampliam o vocabulário, o que contribui para o desenvolvimento de um pensamento crítico e reflexivo, bem como permite relacionar diferentes ideias e conhecimentos. Para além disso, a construção da identidade e das memórias por intermédio da literatura, a imersão no imaginário proporcionada pela leitura dessas obras e o contato com a linguagem literária e poética também podem auxiliar no processo de formação da identidade literária. Esta pesquisa se justifica pela sua importância  literária e também documental de uma literatura que registra, por meio da arte, as memórias e as identidades. Assim, neste trabalho se propôs a analisar a produção da escritora contemporânea Marina Colasanti, tendo como corpus a obra “O rosto atrás do rosto”, presente na coletânea Doze reis e a moça no labirinto do vento (2006). Essa escolha se deve ao fato de cultuar o papel da mulher contemporânea, como as personagens nas obras de Colasanti, evidenciando as expressões marcantes, como o feminino e a solidão da obra, ajuda a compreender o conceito de identidade, que é ideia central nas teorias literárias e sociais presentes em reflexões de diferentes áreas e orientações teóricas, como as análises em torno da memória e/ou da identidade na formação e na construção do ser na sociedade contemporânea. Para isso, esta pesquisa apresenta estudo bibliográfico, tomando-se, como referentes teóricos, autores que investigam sobre o contexto histórico e cultural no processo de construção identitária em formação, como Stuart Hall (2006), Zygmunt Bauman (2005), Bruno Bettelheim (2002), Hans Robert Jauss (1994), entre outros.
MEMBANGUN PERDAMAIAN LINTAS IMAN MELALUI PENDEKATAN INTERRELIGIUS DALAM PENDIDIKAN ISLAM: BELAJAR DARI PESANTREN SOKO TUNGGAL
Authors: Zuhri Achmad Muhibin
Published: August 2023

Conflicts and sentiments between religions in Indonesia have yet to be fully resolved convincingly. This is because many parties still use their beliefs to mobilize interests. Recognizing this phenomenon, this article seeks to examine and analyze the experiences carried out by the Soko Tunggal Islamic Boarding School in mitigating conflict through an inter-religious approach in the praxis of Islamic Religious education. Through qualitative research methods, data were obtained through interviews, observation, and documentation of important data in the field, which in the following stages were analyzed using a multidisciplinary perspective. This study found that the inter-religious approach in the context of Islamic education was carried out to minimize the potential for inter-religious conflict. Through the involvement of religious figures, interfaith dialogue does not want to make Islam a syncretic religion. Through this approach, Islamic education is articulated not only in exclusive-primordial academic activities. But it also opens up space for intellectual awareness that Muslims are an integral part as citizens of the world who are entrusted with maintaining social harmony based on divine, human, and national values.
Development of a Modified Electrode with N-doped Carbon Dots for Electrochemical Determination of 17α-ethinylestradiol
Authors: Freire Brenda , Monteiro Michael , Silva Jonatas , de Macedo José Fernando , Sussuchi Eliana
Published: August 2023

This work aims to develop a modified electrode with N-doped carbon dots (CPE/N-CD) for the voltammetric detection of 17α-ethinylestradiol (EE2) in solution. N-doped carbon dot nanoparticles (N-CD) were synthesized using citric acid and urea as the nitrogen source. The N-doped carbon dots were characterized by absorption and emission spectroscopy in the ultraviolet and visible regions, electronic absorption spectroscopy in the infrared region, and Raman Spectroscopy, which showed evidence of the formation of the material. Electrochemical analyses were conducted utilizing Differential Pulse Voltammetry (DPV). After optimization of electrochemical parameters, a calibration plot was produced for the sensor, demonstrating a linear range of 0.01 to 0.80 μmol L-1 (R2 = 0.9969). Additionally, the sensor exhibited a detection limit (LOD) of 0.59 nmol L-1 and a quantification limit (LOQ) of 2.00 nmol L-1. The studies on reproducibility and repeatability revealed RSDs of 1.63% and 3.61% respectively. The results obtained using CPE/N-CD indicate that the developed electrode exhibits excellent analytical performance, making it suitable for identifying and quantifying EE2 in solution.
Puisi Nikah Sungai dan Nikah Pisau karya Dorothea Rosa Herliany dalam perspektif ekofeminis Mary Daly
Authors: Bahardur Iswadi , Afrinda Putri Dian , Sartika Rina
Published: August 2023

This research is motivated by the problem of the relationship between women and nature with male power which is reflected poetically by Dorothea Rosa Herliany in two poems entitled "Nikah Sungai" and "Nikah Pisau". Based on that problem, this study aims to describe (a) the power of male patriarchal necrophilia over women; and (b) the attitude of women as an effort to free themselves from the necrophiliac power of men. The research method used is qualitative with descriptive content analysis techniques. The research findings show two things. First, the poems "Nikah Sungai" dan "Nikah Pisau" reflect men's efforts to destroy women's natural reproductive abilities using the power of necrophilia through manipulating various natural resources such as plants, rocks, sand, animal carcasses, soil, and poison as weapons. Second, the attitude of women's resistance to the power of male necrophilia which is reflected by Dorothea in her two poems is manifested in acts of physical violence such as stabbing the heart and tearing the male genitalia.
Teachers’ digital competence in the post COVID-19 era: The effects of digital nativeness, and digital leadership capital
Authors: Jogezai Nazir Ahmed , Koroleva Diana , Baloch Fozia Ahmed
Published: August 2023

The COVID-19 pandemic, which posed challenges for accommodating student learning, also opened avenues for using digital resources in online learning. However, differences were observed in their use, effectiveness, and intensity across developed and least developed societies. This is referred to as “digital inequalities,” caused by factors such as insufficient organizational-level support and teachers’ digital competence (DC). This study was conducted to determine teachers’ DC and reveal if their DC was explained by their digital nativeness and principals’ digital instructional leadership capital. The study used a quantitative research method, whereby data were collected from 393 teachers. The researchers used SmartPLS 4 and SPSS 24 to analyze data. The findings complement the available literature and help pave ways to promote the integration of digital resources in teaching and learning.
Development of indicators for performance assessment of blue-green infrastructures
Authors: Kretschmer Florian , Prenner Flora , Ertl Thomas , Pucher Bernhard
Published: August 2023

The application of blue-green infrastructures in urban areas incorporate various benefits and is thus widely accepted today. However, while aspects of planning and construction are well approved, operation and maintenance are still lacking broad attention. To contribute to the progress in the field, this conference contribution provides a framework for developing related performance indicators and service levels based on an international and well-established European standard focusing on drain and sewer systems. While the standard focuses on grey infrastructure our preliminary results show the adaptability towards more innovative blue-green perspectives. Currently, our work is still on a more theoretic and conceptual level, but an ongoing case study application in a city quarter reconstruction site will show its practicability and support the development of suitable performance indictors and service levels for selected blue-green infrastructures. Finally, building on an existing European standard will make our work easily transferable and adaptable to other European countries and beyond.
Multi-scale high-resolution atmospheric emission inventory for the transport sector
Authors: Lopes Diogo , Augusto Bruno , Rafael Sandra , Graça Daniel , Rosa Miguel , Relvas Hélder , Ferreira Joana , Reis Johnny , Lopes Myriam
Published: August 2023

This study aims to develop a multi-scale atmospheric emission inventory for the transport sector with high spatial and temporal resolution using Portugal as a case study. For that, a combination of the traditional method of emissions calculation with an innovative way to gather and process data (BigAir approach) was implemented. The accuracy of the developed inventory was evaluated by applying a multi-scale air pollution system, with two sets of data: i) BigAir and ii) EMEP emission inventories. The scalability and replicability nature of the BigAir approach allows it to be used by the scientific community in other regions of the world.
Social Acceptability of Offshore Wind Projects in Greece: Citizen Perspectives on Challenging Issues of Site-Selection Problem
Authors: Spyridonidou Sofia , Vagiona Dimitra
Published: August 2023

Lack of social acceptance remains a major constraint towards offshore wind project (OWP) deployment. The incorporation of local population perspectives and concerns into the site-selection process of OWPs can assist to overcome the respective barriers. In this work, an appropriately designed methodological framework is introduced for the identification of citizen perspectives on many challenging issues of site-selection of OWPs. The methodology includes three consecutive phases: (Phase 1) design of questionnaire survey and acquisition of citizen responses; (Phase 2) quantitative and qualitative analysis of citizen responses and synthesis of survey results; and (Phase 3) creation of an OWP roadmap for Greece in GIS, in accordance with the citizen perspectives and requirements. In total, 1,802 citizens participated in the survey from various geographic locations of all Regions of Greece. The survey results reveal the high social acceptability (80.6% of the participants) for OWP deployment in Greece and present the citizen requirements on the selection of eligible sites for their installation (e.g., a minimum distance of 5,000 m from shoreline has been suggested (median value)). In conclusion, the proposed participatory tool could facilitate the deployment of OWPs in Greece, by avoiding socially unsustainable sites and, thus, strongly enhancing the social acceptability of the future projects.
Paleolimnological approach infers past environmental changes archived in lake sediments of Bukit Merah Reservoir, Malaysia.
Authors: Wan Maznah Wan Omar , Akogwu Simoen , McGowan Suzanne , Luki Subehi , Fielding James
Published: August 2023

Human activities in the watershed of Bukit Merah Reservoir, have significantly increased, placing unprecedented pressure on this important system. However, long-term records of the ecological effects are scarce. Thus, this research aims to examine the impact of human-induced environmental change on the reservoir using a paleolimnological approach. Two 25 cm sediment cores were extracted from the reservoir using a Uwitech corer, and analysed for 210Pb, elemental geochemistry, and diatom remains. Using 210Pb and the Constant rate of Supply Model (CRS) the oldest sediments (22.5-24.5 cm) were dated to AD 1985 ± 34 years. The mean concentration of metals (As, Cd, Cu, Pb, and Zn), total nitrogen (TN), total organic carbon (TOC), and total phosphorus (TP) increased from the bottom of the core and fluctuated to the top. This may be ascribed to increasing usage of agrochemicals, tourism, industry contributions, sand excavation, and inputs from small and medium-scale companies in the catchment area. In this study, the dominance of diatom species (Aulacoseira granulata, Aulacoseira ambigua, Discostella stelligera, and Cyclotella meneghiniana) throughout the length of the core, indicates high productivity of the reservoir due to continuous human impacts. As a result, immediate action is needed to further ameliorate the degradation of the reservoir.
The Carbon Footprint of International Tourism in the European Union
Authors: Markaki Maria , Papadakis Stelios
Published: August 2023

In recent years, international tourism has emerged as an activity with a high contribution to carbon emissions. Calculating the carbon footprint of tourism is the first step towards achieving low-carbon tourism development, mainly if it includes a detailed assessment of the carbon footprint by country of origin, destination country, and sector of economic activity. This research aims to estimate the carbon footprint of international tourism expenditure for the European Union countries. The carbon footprint calculation employs an Environmentally Extended Multi-regional Input-Output (EEIO) model. It combines the intra-regional and inter-regional transactions with data from the Tourism Satellite Accounts (TSA). The findings show that for countries with strong tourism growth, the carbon footprint of tourism is about 4% of the total carbon footprint, while it is significantly lower for other countries. Furthermore, the sectors of electricity generation, transport (water, air, and land), food products industry, accommodation, and food services contribute about 85% of the total CO2 pollutants due to international tourism.
Retention potential of contaminants by (nano)magnetite in batch and microfluidic systems
Authors: Papaslioti Evgenia Maria , Tabuteau Herve , Vantelon Delphine , Le Bouteiller Philippe , Greneche Jean-Marc , Fernández Martínez Alejandro , Charlet Laurent
Published: August 2023

(Nano)magnetite (Fe3O4) has been suggested to be a significant reductant for contaminants due to its great adsorption capacity and ability to retain metals on its high specific surface. Its use has become an emerging technology for the treatment of contaminated land and water with a great potential to become an effective and low-cost alternative to conventional remediation techniques. We have taken advantage of a concept of the circular economy, exploiting an existing waste from the steel industry that HYMAG’IN company has transformed into magnetite, to study the immobilisation of As, Sb, and U in batch sorption systems and provide new insights into a new ‘green’ route for the decontamination of water. Moreover, given that polymeric coatings can maximize the adsorption capacity, we additionally, mimic those systems in a micro-scale format via the use of bionanocomposite and microfluidics to study time-dependent Sb reduction by nanomagnetite aggregates. Synchrotron X-ray Absorption Spectroscopy (XAS) is applied for the first time to such experimental systems to shed light into the role of nanomagnetite aggregates into the immobilization of Sb, as a novel remediation strategy.
Comparative analysis of WtE technologies based on multiple criteria analysis and life cycle considerations
Authors: VLACHOKOSTAS CHRISTOS , Mertzanakis Christos
Published: August 2023

Nowadays, a range of alternative options and technologies for Waste to Energy are currently available and analytically discussed in the effort to promote energy production and rational waste management. In this paper, a generic methodological scheme is proposed for the comparative analysis of WtE (Waste-to-Energy) technologies based on multiple criteria analysis and life cycle considerations. The approach is based on Multi-Criteria Decision Analysis (MCDA). The methodological scheme simultaneously considers environmental, economic, and social criteria to support robust decision-making. Towards validating the methodology, the latter was demonstrated in a real-world case study taking for Greece, considering four main technological options i.e., incineration, gasification, pyrolysis, and anaerobic digestion. Questionnaires, both for a pool of fifteen experts and the public were disseminated and interesting results are analyzed and discussed. Based on the proposed methodological scheme, the results for the basic scenario (when social, environmental, and economic considerations have equal weighting factor) promote anaerobic digestion as a more preferred option for Greece, followed by incineration, gasification, and pyrolysis. However, the optimal solution puts forward a mixture of technologies (i.e., combination of anaerobic digestion and incineration or gasification), depending on the differentiations of the scenarios weighting factors. Life cycle thinking should also be considered to provide a more reliable analysis related to the estimation of environmental performance of alternative technological solutions.
Contemporary assessment of International Maritime Organization’s Carbon Intensity Indicator requirement on tanker vessels’ chartering and employability prospects
Authors: Grapsas Nikolaos
Published: August 2023

Carbon Intensity Indicator (CII) is one of the measures adopted by International Maritime Organization (IMO) in June 2021 during the 76th session of the Marine Environment Protection Committee (MEPC) for the reduction of carbon intensity of international shipping, taking effect from January 1, 2023. The CII consists an operational rating system that measures the efficiency of a vessel in grams of CO2 by cargo carrying capacity in nautical miles (g CO2/t-nm). Starting with the pertinent data for 2019 as reference and with a reduction of 1% per annum from 2020 to 2022 and thereafter of 2% per annum from 2023 to 2026, each vessel’s CII shall be calculated each year and a rating ranging from A to E will be assigned to the vessel. If a vessel gets a rating of D or E corrective actions will need to be implemented. Considering that the CII rating is affected by factors (such as, for example, the distance sailed, the fuel used, time in port, whether the vessel is loaded or ballast) that depend on operational and/or commercial considerations of the parties involved, vessels’ chartering will be affected by way of the provisions in the charter party regarding the need to abide by the CII requirements as well as by any implications on vessel’s employability prospects due to vessel’s attained CII rating. Aim of this paper is to provide a concise, yet comprehensive, assessment on the topic and offer suggestions for further analysis.
Assessing the implications of IMO 2020 on tanker vessels’ chartering and employability prospects with a focus on the installation of SOx Scrubbers
Authors: Grapsas Nikolaos , Vlachos George
Published: August 2023

As from January 1, 2020 the limits, which were coined as IMO 2020, of sulphur in fuel oil used on board vessels operating outside emission control areas was reduced from 3.50% m/m (mass by mass) to 0.50% m/m. Those limits are set out in Annex VI of the International convention for the Prevention of Pollution from Ships (MARPOL) is an attempt by International Maritime Organization (IMO) to reduce sulphur oxide produced by ships. To be noted that in the designated emission control areas (the Baltic Sea are, the North Sea are, the North American are, and the United States Caribbean Sea area) the maximum sulphur limit is 0.10%. One of the ways of complying with the IMO 2020 limits is by installing an exhaust gas cleaning system (scrubber) – others being switching from high-sulphur fuel oil (HSFO) to marine gas oil (MGO) or distillates; using very low sulphur fuel oil (VLSFO) or compliant fuel blends; use of sulphur free fuels. The installation of a scrubber ensures use of HSFO without breaching the IMO 2020 limits. Considering the importance and necessity of complying with IMO’s regulations, this paper will assess the implications of IMO 2020 on tanker vessels’ chartering, by way of the charter party provisions ensuring compliance, as well as the implication on their employability prospects. Particular emphasis will be put on the installation of scrubbers and the emergence of two-tier (or multitier) chartering market for tanker vessels. Aim of this paper is to provide a concise, yet comprehensive, view on the topic.
The chemical exposome in brain cancer: an exploratory study.
Authors: Gago-Ferrero Pablo , Gil-Solsona Rubén , Pons-Escoda Albert , Díez Sergi , Gutiérrez-Martín Daniel , Vidal-Sarró Noemí , Bruna Jordi , Dadvand Payam , Majós Carles
Published: August 2023

Diffuse gliomas are a highly heterogeneous and aggressive brain tumours with poor prognosis and survival and few established risk factors. Environmental exposures are suspected in the pathogenesis of these tumours; however, results of existing studies are limited and inconsistent, particularly for exogenous organic chemicals, with no available characterization of the chemical exposome of these tumours. Also, better understanding of phenotypic differences in tumour types is needed in order to improve clinical decision making and provision of personalised treatment recommendations. In this proof-of-concept study we analysed 33 glioblastoma samples (Bellvitge Glioma Cohort (BGC), Spain, 2005-present), including 16 methylated and 17 non-methylated tumours combining HRMS-based wide-scope target and suspect strategies. Forty-six exogenous chemicals were identified in the tumour tissue samples (31 confirmed with standard) including a variety of industrial chemicals (e.g. plastic additives or perfluorinated compounds), personal care products and pharmaceuticals. Our findings provide novel evidence on the presence of these chemicals in brain tissue, highlighting the need for comprehensive evaluations of their potential effects in the tumour pathogenesis. Finally, after applying metabolomics methods we observed clear differences in the profiles of endogenous chemicals among the studied glioma subtypes, and identified possible biomarkers. These chemicals have potential to be determined in a non-invasive manner, either by LCHRMS-based blood analysis or using complementary techniques (proton magnetic resonance (1H-MRS)). These are inspiring results since methylation is a strong independent predictor of survival as well as tumour response to chemotherapy for glioblastoma. Indeed, its non-invasive and pre-surgical determination would have a major impact on patient management. Our preliminary data is suggestive for the potential of nontargeted exposome methods to find new valuable biomarkers for diffuse gliomas diagnostic and prognostic stratification.
Environmentally-Extended Multi-Regional Input-Output Analysis of neodymium, cobalt and lithium used in electric vehicles
Authors: García-Martínez María-Jesús , Martínez-Hernando María-Pilar , Bolonio David , Ortega Marcelo , Llamas Juan
Published: August 2023

In the transportation sector, the market share of world electric vehicle sales has changed from 0.0% in 2010 to 3.2% (2.1 million) by 2020, and according to forecasts, sales in 2030 may rise to close to 30%. This drastic change is encouraged by environmental goals set to reduce CO2 emissions, not emitted by electric vehicles (EVs) during the use phase. However, clean technologies (such as electric cars) can cause other effects in mining, processing metals, and the manufacture of permanent magnets or batteries. In addition, the use of electric cars can increase the dependence on countries that control the mining and/or production of materials like neodymium, lithium or cobalt. This work performs an Environmentally-Extended Multi-Regional Input-Output Analysis (EEMRIO) to quantify the flow of neodymium, lithium and cobalt (through a Material Flow Analysis) and assess the CO2 equivalent emissions (through a life cycle assessment) of these materials, needed to manufacture the permanent magnets and batteries of electric vehicles. This method is useful to analyze the origin (countries) where the environmental impact is produced, in contrast to conventional methodologies that only calculate global impacts. Different scenarios, based on the environmental objectives of the European Union and China, were considered. China shows a key role in mining, processing and manufacture of permanent magnets and batteries, with 60.8% of mining and 79% of manufacturing respectively. Due to Chinese domain, China is the country with highest emissions of CO2-eq, a 73.11% of total emissions. Obtained results are useful to assess which environmental proposals are more effective to reduce the environmental impact of EVs and to assess the dependency of these rare earths.
Adsorption of antibiotics and dyes with individual and simultaneous mechanisms onto halloysite nanoclay and regeneration by cold plasma bubbling technology of saturated adsorbent
Authors: Aggelopoulos Christos , Giannoulia Stefania , Triantaphyllidou Eva , Tekerlekopoulou Athanasia
Published: August 2023

Methylene blue (MB) dye and the antibiotic enrofloxacin (ENRO) were individually and simultaneously removed from aqueous solutions while halloysite nanoclay (HNC) was also regenerated using cold atmospheric plasma (CAP) bubbling. In contrast to Fenton oxidation, the CAP-bubbling method efficiently regenerated the saturated HNC, while in parallel enhanced adsorption capacity of the CAP-regenerated HNC (compared to raw HNC) was noticed after reuse in new adsorption cycles which indicates the activation of the absorbent activation during the regeneration process. This study proposes a safe, long-lasting, and highly efficient method for contaminated water remediation in which pharmaceuticals and dyes co-exist.