Journal Widya Mandala Catholic University Surabaya / Jurnal Universitas Katolik Widya Mandala Surabaya
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A Review of the Development and Role of Heterogeneous Catalysts for Biodiesel Production
Get PDFIndonesian regulations regarding the implementation of B30 encourage a significant increase in biodiesel demand. Moreover, this implementation will continue to be increased to B35 in 2025 and is projected to reach B100 in 2045. This high demand for biodiesel needs to be supported by the development of adequate biodiesel production technology where the catalyst is one aspect that plays an important role in biodiesel production. The use of catalysts aims to accelerate biodiesel production so that high biodiesel yields and good quality are achieved. In biodiesel production, the choice of catalyst greatly influences the operating conditions, the products produced, the subsequent purification process, and the environmental impacts. Moreover, the changing trend in biodiesel raw materials from food to non-food ingredients requires the development of catalysts that are more suitable for the raw materials used in biodiesel production. The specific characteristics of each catalyst play an important role in the transesterification reaction to produce biodiesel where this needs to be supported and adapted to optimum operating conditions, especially in terms of alcohol-to-oil molar ratio, catalyst amount, temperature, pressure, and reaction time. This review provides a comprehensive overview of the various heterogeneous catalysts used to assist the transesterification reactions in biodiesel production
THE IMPACT OF A FLIPPED CLASSROOM ON STUDENTS SELF-REGULATION IN PRIMARY EDUCATION
Get PDFThe research examines the impact of flipped classrooms students’ self-regulation of sixth- and fifth-grade students at SD Citra Berkat The Taman Dayu. The goal of the research is to determine how the flipped classroom approach affects students' ability to self-regulate by combining quantitative and qualitative analysis, identifying patterns, and making interpretations based on the findings. The research involves a survey of 52 elementary school students to evaluate self-regulation and perceptions of the flipped classroom. The findings are presented through interviews, observations, and surveys, indicating positive outcomes such as improved self-regulation, increased understanding of concepts, and enhanced student motivation to learn. The research's findings indicate that the implementation of the flipped classroom approach may enhance student self-regulation by providing opportunities for independent learning, time management, and task organization, ultimately enhancing academic achievement and understanding of concepts. The finding point to the flipped classroom approach's potential advantages for encouraging student involvement and self-regulation
STUDENTS’ LEARNING STRATEGIES USED IN IMPROVING THEIR SPEAKING PERFORMANCE: A NARRATIVE INQUIRY
Get PDFSpeaking is one of the language skills that students, particularly English department students, should develop. In order to master the act of speaking English, students should have a strategy that they can implement. This study explores how students improve their speaking performance while learning English. More particularly, this study explored the strategies students use to develop their speaking performance. A narrative inquiry was employed in this study. Three excelled students in the English department of a private university in Surabaya participated in this study. The results of this study showed various strategies that students used to improve their speaking performance. They included direct strategies consisting of memory, cognitive, and compensation, and indirect strategies consisting of metacognitive, affective, and social strategies. Among these strategies, the compensation strategy was the least used, and the affective strategy was used in all kinds of situations by students who excelled in their speaking performanc
PENGARUH PENGUNGKAPAN EMISI KARBON, ECO- EFFIENCY, DAN GREEN INNOVATION TERHADAP NILAI PERUSAHAAN
Get PDFThe main purpose of a company is to maximize company value and create financial prosperity for company owners and interested parties. Basically, investors use company value as an indicator in assessing company performance. However, the reality is that the rapid development of the industry is also accompanied by increasing environmental problems, but many companies do not consider environmental impacts in their operational activities. In this context, it is important for companies to not only focus on economic aspects, but also consider environmental aspects in order to increase company value. There are several factors that can affect firm value. Therefore, this study was conducted with the aim of examining the disclosure of carbon emissions, eco-efficiency, and green innovation on firm value. This research is quantitative research using hypothesis testing. The independent variables used in this study are disclosure of carbon emissions, eco-efficiency, and green innovation. The dependent variable is firm value. This study uses control variables of company size and profitability. The object of this research is all manufacturing sector companies listed on the IDX in 2019-2022. The analysis technique used in this research is multiple regression analysis. The results of this study prove that eco-efficiency and green innovation have a positive influence on firm value. This means that the more companies that implement eco-efficiency and green innovation will encourage an increase in firm value. On the other hand, carbon emission disclosure has no influence on firm value. This is because the level of disclosure made by the company is still low so that it has not been able to affect the firm value
PENGARUH UMUR, GENDER, KEAKTIFAN, EXPERTISE FINANCE DAN MASA JABATAN KOMITE AUDIT TERHADAP MANAJEMEN LABA
Get PDFFinancial report information is a basic reference for making investment decisions for investors and shareholders. The profit achieved by a company is often a measure in assessing a company's performance. This shows that the existence of profits in financial statements is very important so that supervision over its presentation is needed to avoid earnings management behavior by management, which can obscure financial information to make it less appropriate to current developments. One effort that can be made is to make changes in the management of business entities by having an audit sub-organization division or known as an audit committee as part of improving company control. In this research, testing the existence of an audit committee focuses more on the personal characteristics of each member. In this research, testing the existence of an audit committee focuses more on the personal characteristics of each member. The aim of this research is to examine and analyze the influence of the factors age, sex or gender, level of activity, experience in financial expertise and the general term of office of the audit committee on earnings management. This quantitative research used eighty-five samples of manufacturing companies listed on the Indonesia Stock Exchange for the 2017-2019 period. The research sample was determined using a purposive sampling technique with reference to certain criteria. The data analysis technique used is multiple linear regression. The results of this study show that the age of the audit committee has a negative effect on earnings management, while the gender of the audit committee, the level of activity of the audit committee, understanding of the audit committee's financial expertise and the age of the audit committee's term of office have no effect on earnings management
EFEKTIVITAS PELATIHAN SELF-AWARENESS UNTUK MENINGKATKAN HARGA DIRI REMAJA PANTI ASUHAN
No full textRemaja panti asuhan adalah remaja yang rentan dengan permasalahan psikologis, salah satunya harga diri yang rendah. Rendahnya harga diri berkaitan dengan kurangnya pemahaman terhadap diri sendiri sehingga pelatihan self awareness diduga efektif dapat meningkatkan harga diri. Tujuan penelitian ini untuk mengetahui perbedaan harga diri pada remaja panti asuhan yang diberikan pelatihan self-awareness dengan yang tidak diberi pelatihan. Desain penelitian ini adalah quasi experiment dengan pre test-post test control group design non randomized. Jumlah subjek 28 remaja panti asuhan dengan rentang usia 12-18 tahun yang dibagi ke dalam kelompok eksperimen dan kontrol dengan menggunakan matching method. Penelitian ini mengukur tiga aspek, yaitu aspek pengetahuan, sikap, dan perilaku. Pengukuran pengetahuan menggunakan soal pilihan ganda berdasarkan materi self-awareness. Pengetahuan sikap menggunakan Rosenberg Self-Esteem Scale yang diadaptasi dalam Bahasa Indonesia. Alat ukur aspek perilaku menggunakan indikator harga diri positif dan negatif dari Santrock (2007). Hasil dari penelitian ini adalah terdapat peningkatan pengetahuan dan sikap pada kelompok eksperimen, sedangkan tidak ada peningkatan pada kelompok kontrol. Pengukuran perilaku masing-masing kelompok mengalami peningkatan perilaku indikator positif dan mengalami penurunan indikator negatif. Analisis data menggunakan uji non parametrik Mann Whitney U-test dengan membandingkan nilai gain score pre-test dan post-test dengan signifikansi 0.000 < 0.05 artinya ada perbedaan harga diri antara kelompok eksperimen dan kelompok kontrol. Penelitian ini memiliki eta square sebesar ɳ2= 0,62. Artinya, pelatihan self-awareness memiliki efek yang besar terhadap harga diri remaja panti asuhan. Penelitian ini memberikan implikasi pentingnya pelatihan mengenal diri sendiri demi meningkatkan self-esteem
EXPERIENTIAL MARKETING, SERVICE QUALITY: MEDIASI PERCEIVED VALUE TERHADAP CUSTOMER TRUST BATIK AIR
Get PDFThis research is motivated by the people who currently still need air transportation. This is marked by the many current airline services such as Batik Air, Lion Air, Citilink, Garuda Indonesia, Air Asia and so on. Batik Air is one of the airlines that offers a full service system that is of interest to the public, as evidenced by the Top Brand Index for 2020-2022 Batik Air occupies fourth place. This study aims to determine the effect of experiential marketing and service quality on customer trust through perceived value as an intervening variable. The sample used in this study was 150 samples with a purposive sampling method. The data used is primary data obtained by distributing questionnaires to users of the Batik Air airline in Surabaya. The data analysis technique used is SEM with the LISREL program. The results of this study indicate thet experiential marketing has a positive and significant effect on perceived value; service quality has a postive and significant effect on perceived value; perceived value has a positive and significant effect on customer trust; experiential marketing and service quality have a positive and significant effect on customer trust through perceived value. This indicates that positive experience and service quality will be trusted by consumers will receive perceived value
PENGARUH SUBTITUSI HATI AYAM DAN KALAKAI (Stenochlaena palustris) TERHADAP MUTU PATTY BURGER SEBAGAI MAKANAN TAMBAHAN IBU HAMIL ANEMIA
Get PDFIbu hamil termasuk kelompok yang berisiko tinggi mengalami anemia. Penambahan kalakai dan hati ayam ke dalam patty burger mampu meningkatkan kandungan zat besi dan protein dalam patty burger. Penelitian ini bertujuan untuk melihat pengaruh substitusi hati ayam dan kalakai untuk meningkatkan mutu dan zat gizi patty burger. Jenis penelitian eksperimental menggunakan rancang acak lengkap (RAL) dengan 5 perlakuan 3 kali ulangan. Hasil pengujian kadar protein dan zat besi dianalisis dengan ANOVA pada taraf 5%. Pada uji organoleptik dan mutu organoleptik menggunakan uji Kruskal Wallis. Waktu penelitian bulan Februari s/d Juni 2023. Analisis zat gizi dilakukan di Laboratorium Politeknik Pertanian Negeri Samarinda dan Uji organoleptik dan mutu organoleptik dilakukan di Laboratorium Poltekkes Kemenkes Kaltim. Hasil penelitian ini menunjukkan perbedaan nyata pada uji hedonik mutu hedonik terhadap warna patty burger substitusi hati ayam dan kalakai (p=0,000), sedangkan pada aroma, rasa, dan tekstur tidak terdapat perbedaan nyata (ph=0,075), (ph=0,952), (ph=0,250, (pmh=0,433) (pmh=0,462), (pmh=0,523). Pada uji kandungan zat gizi teradapat perbedaan nyata terhadap kadar protein patty burger (p=0,000), pada kadar zat besi tidak terdapat perbedaan nyata (p=0,203). Pada uji hedonik dan mutu hedonik, perlakuan yang paling disukai perlakuan P2, aroma yang paling disukai perlakuan P4, rasa dan tekstur yang paling disukai perlakuan P5. Berdasarkan uji kandungan gizi, kandungan protein terbaik ada pada perlakuan P2 dan kandungan zat besi terbaik pada perlakuan P5. Saran dari penelitian ini adalah mengurangi tahapan proses pemanasan produk
ANALISIS KANDUNGAN GIZI DAN ORGANOLEPTIK KRAKERS SUBSTITUSI TEPUNG UBI JALAR UNGU DAN TEPUNG TEMPE SEBAGAI ALTERNATIF PMT BALITA GIZI KURANG
Get PDFPemenuhan zat gizi yang optimal diperlukan oleh balita gizi kurang. Tepung ubi jalar ungu dan tepung tempe berpotensi untuk dikembangkan menjadi PMT yang memiliki nilai gizi tinggi terutama energi dan protein. Penelitian ini bertujuan untuk mengetahui pengaruh substitusi tepung ubi jalar ungu dan tepung tempe terhadap kandungan gizi dan organoleptik krakers sebagai alternatif PMT balita gizi kurang. Desain penelitian menggunakan eksperimental dengan rancangan acak lengkap (RAL) dengan 3 formulasi perbandingan tepung terigu, tepung ubi jalar ungu, dan tepung tempe antara lain F1 (65%: 15%: 20%), F2 (60%: 20%: 20%), F3 (55%: 25%: 20%) dan 2 kali pengulangan. Uji organoleptik pada 30 orang panelis agak terlatih. Hasil penelitian menunjukkan bahwa substitusi tepung ubi jalar ungu dan tepung tempe berpengaruh nyata terhadap warna, tekstur, kadar air, abu, lemak, protein, dan karbohidrat (p<0,05). Kandungan gizi per 100 g krakers formulasi terpilih F3 yaitu kadar air 7,71%, abu 3,90%, protein 12,71%, lemak 11,18%, dan karbohidrat 63,99%. Uji hedonik menghasilkan warna, aroma, rasa, tekstur, dan aftertaste dengan penilaian cukup suka. Krakers F3 memenuhi syarat mutu SNI krakers dan PMT, kecuali kadar air dan abu. Krakers F3 per takaran saji 40 g (10 keping) memberikan kontribusi 10-15% dari AKG balita 1-3 tahun dan dapat diklaim sebagai krakers tinggi protein dengan ALG sebesar 48,88%
Product Placement Dalam Serial Drama Korea (Analisis Isi Kualitatif terhadap Evaluasi Atribut Product Placement Kopiko dalam Drama Korea Vincenzo)
Get PDFThis study aims to analyze the implementation of Kopiko product placement in the Korean drama "Vincenzo" through Russell's (2002) dimensions of product placement, while evaluating the associated attributes of Kopiko brand placement within it. Considering the attributes of Entertainment, Informativeness, and Discomfort as outlined by Ducoffe (1996), the study adopts a qualitative approach with a constructivist paradigm, utilizing content analysis as the research method. The units of analysis include episodes 14, 15, 17, and 19 of the drama "Vincenzo". The analysis results indicate that the product placement strategy successfully optimizes visual, entertainment, and informative attributes in each episode. Aligning product messages with the storyline is crucial to maintaining narrative integrity without disrupting the viewer's experience. For instance, dialogues promoting the consumption of Kopiko candies in specific scenes demonstrate effective alignment between product messaging and narrative context. The informative attribute of product placement is also demonstrated effectively, particularly in episode 19 where information about Kopiko's product advantages is conveyed through dialogue, providing added value to viewers with relevant product information aligned with product placement attributes. Nevertheless, there is a risk of discomfort from product placement if the integration of the product within the storyline is inadequate. This study underscores the importance of considering product integration with a consistent narrative to avoid disruptions to the viewer's experience.ABSTRAKPenelitian ini bertujuan untuk menganalisis implementasi product placement Kopiko dalam drama Korea Vincenzo melalui dimensi product placement oleh Russell (2002), serta mengevaluasi atribut-atribut product placement yang terkait dengan merek Kopiko di dalamnya. Dengan mempertimbangkan atribut Entertainment, Informativeness, dan Discomfort sebagaimana dijelaskan oleh Ducoffe (1996). Metode yang digunakan adalah pendekatan kualitatif dengan paradigma konstruktivisme, menggunakan analisis isi sebagai jenis penelitian. Unit observasi yang dianalisis adalah episode 14, 15, 17, dan 19 dari drama Korea Vincenzo. Hasil analisis menunjukkan bahwa strategi product placement berhasil mengoptimalkan atribut visual, hiburan, dan informatif dalam setiap episode. Penyesuaian pesan produk dengan alur cerita menjadi kunci utama untuk menjaga integritas naratif tanpa mengganggu pengalaman menonton. Seperti dialog yang mengarahkan konsumsi permen Kopiko dalam adegan tertentu menunjukkan penyesuaian yang baik antara pesan produk dan konteks cerita. Atribut informatif dari product placement juga terbukti efektif, terutama pada episode 19 di mana informasi mengenai kelebihan produk Kopiko disampaikan melalui dialog, yang memberikan nilai tambah kepada penonton dengan informasi yang relevan sesuai dengan atribut. Meskipun demikian, risiko ketidaknyamanan dari product placement dapat terjadi jika produk tidak terintegrasi dengan baik dalam cerita. Penelitian ini menyoroti pentingnya mempertimbangkan integrasi produk dengan naratif yang konsisten untuk menghindari gangguan pada pengalaman penonton