bluuebunny/crossref_metadata_2025 huggingface dataset:
Wpływ wielkości stada i wydajności mlecznej krów na koszty produkcji mleka
Authors: Mańko Stanisław
Published: January 2024

W opracowaniu przedstawiono zróżnicowanie kosztów produkcji mleka w gospodarstwach wyspecjalizowanych w chowie bydła mlecznego, prowadzących rachunkowość w 2005 r. według standardu FADN. Badania przeprowadzono wykorzystując algebraiczną funkcję kosztów. Stwierdzono, że na jednostkowy koszt produkcji mleka wpływa skala produkcji, mierzona liczbą utrzymywanych krów oraz wydajność mleczna. Wzrost skali produkcji powodował początkowo obniżenie, a następnie przyrost jednostkowego kosztu produkcji mleka. Wyższa wydajność mleczna krów niezależnie od skali produkcji powodowała obniżenie kosztu jednostkowego.
Fundusz udziałowy a sytuacja finansowa spółdzielni mleczarskich
Authors: Dworniak Jan , Wasilewski Mirosław
Published: January 2024

W opracowaniu przedstawiono relacje między poziomem funduszu udziałowego a kondycją finansową spółdzielni mleczarskich. Wraz ze wzrostem wielkości tego funduszu odnotowano zwiększanie się ekonomicznej wydajności pracy, zaktualizowanej zyskowności majątku i funduszu własnego, jak również przychodów ze sprzedaży. W zakresie płynności finansowej zależności nie były tak jednoznaczne, chociaż najkorzystniejsza sytuacja dotyczyła spółdzielni o najwyższym funduszu udziałowym. W spółdzielniach stwierdzono racjonalne zarządzanie należnościami i zobowiązaniami.
Koszty współistnienia produktów modyfikowanych genetycznie i niezmienionych w łańcuchu dystrybucji pasz treściwych zawierających soję
Authors: Maciejczak Mariusz
Published: January 2024

W dobie dynamicznego rozwoju produkcji opartej o organizmy modyfikowane genetycznie (GMO) dużego znaczenia nabierają kwestie współistnienia produkt ów GMO i niezmienionych w łańcuchu żywności i pasz dla zwierząt. Podstawowym warunkiem współistnienia jest zagwarantowanie konsumentom możliwości wyboru spośród dostępnych produktów pochodzących z różnych systemów rolniczych. Rodzi ono jednak określone skutki ekonomiczne. Celem opracowania jest zbadanie kosztów generowanych w wyniku wdrożenia działań współistnienia w łańcuchu dystrybucji pasz treściwych zawierających soję. Analizy dla roku 2006, oparto o model uwzględniający dodatkowe koszty współistnienia. Stwierdzono, że koszty te wynosiły 35,85 zł/t dla paszy i były narzucane na produkty niezawierające GMO.
Happiness, health and family type
Authors: Heijman Wim , Van Ophem Johan
Published: January 2024

At the individual level, income is not the only and important factor that explains happiness. It can be concluded from several cross-section studies that- after controlling for inter correlations - health, marital status, ethnicity, presence of young children and religious affiliation are relevant too. Despite a secular rise in real income in the richer part of the world, happiness has not increased. Two factors that may account for this - health and family type - are discussed in this paper. Special attention is paid to the impact of obesity and the growing incidence of divorce and separation.
Pulmonary Function Trajectories Over Six Years and Their Determinants in Type 2 Diabetes:The Fremantle Diabetes Study Phase II
Authors: Davis Timothy M. E. , J Drinkwater Jocelyn , A Davis Wendy
Published: January 2024

Objective: To assess whether there are clusters of people with type 2 diabetes with distinct temporal profiles of lung function changes and characteristics.

Research design and methods: Group-based trajectory modelling (GBTM) identified groups of participants with type 2 diabetes from the community-based observational Fremantle Diabetes Study Phase II (FDS2) who had ≥2 biennial measurements of forced expiratory volume in 1 s as a percentage of predicted (FEV1%pred) over six years. Independent associates of group membership were assessed using multinomial regression.

Results: Of 1,482 potential FDS2 participants, 1,074 (72.5%; mean age 65.2 years, 45.5% female, median diabetes duration 8.0 years) were included in the modelling. The best fitting GBTM model identified four groups; high (19.5%; baseline FEV1%pred 106.5±9.5%, slope 0 %/year), medium (47.7%; FEV1%pred 87.3±8.7%, slope -0.32 %/year), low (25.0%; baseline FEV1%pred 68.9±9.8%, slope -0.72 %/year) and very low (7.9%; baseline FEV1%pred 48.8±9.6 %; slope -0.68 %/year). Compared with the high group, the other groups were characterized by non-modifiable and modifiable risk factors associated with lung function decline in the general population (including ethnicity, marital status, smoking, obesity, coronary heart disease and chronic respiratory disease). The main diabetes-specific significant predictor of group membership was a higher HbA1c in the very low group. There was a graded increase in mortality from 6.7% in the high group to 22.4% in the very low group.

Conclusions: Measurement of lung function in type 2 diabetes could help optimize clinical management and improve prognosis, including addressing glycemic control in those with a very low FEV1%pred.
Towards novel antimicrobials
Authors:   , Costanzo Chiara
Published: January 2024

The widespread use of antimicrobials has led to the development of resistance to most known active compounds. This has led to the necessity to discover new drugs or adopt new strategies in order to overcome resistance. Benzimidazole is a building block commonly found in pharmaceuticals. It is well known for its antimicrobial, antiviral, anticancer and antiulcer properties as well as antihistaminic, anticoagulant and anti-inflammatory activity. In order to overcome bacterial resistance to β-lactam antibiotics, an in-silico screening of the designed benzimidazoles was undertaken leading to a library of compounds with good predicted binding affinity for lytic transglycosylases, a group of enzymes involved in the induction of β-lactamases. Strategies for extending the benzimidazole nucleus were developed, leading to the synthesis of 150 compounds. The synthetic strategies explored led to the discovery of a N1 / C2 competition with the recovery of two products in a one pot synthesis. This allowed formation of N1-alkylated and 2-phenyl analogues as well as 2-pyrrole and 2-thiophene derivatives. The consolidation of the most suitable synthetic method for extending the core in position number 2 furtherly led to bis-benzimidazoles and indole-benzimidazole hybrids. The benzimidazoles synthesized were screened against E. coli, S. aureus and P. aeruginosa, leading to the identification of hit compounds with antibacterial effect, one of them having a comparable activity to ampicillin. Furthermore, as benzimidazoles are well known for targeting tubulin, an attractive target for antiparasitic drugs, the effect of the benzimidazoles against S. mansoni was investigated in order to establish their activity against parasitic worms. A hit compound was selected for affecting both phenotype and motility in adult worms. Structure-activity relationship considerations have been proposed and the most promising core modifications leading to antibacterial or antiparasitic activity have been highlighted. Overall, this work has identified new antibacterial and antihelminthic hit compounds that can form the basis for future work to improve potency, confirm the compounds’ targets, and investigate other important medicinal chemistry considerations such as selectivity and ADME properties.
Mathematical Model of Spreading Oil Pollution in Coastal Marine Systems
Authors: Sidoryakina V. V.
Published: January 2024

Introduction. The negative consequences that may arise due to an accidental oil spill are diﬃcult to account for, since they disrupt many natural processes and relationships within the ecosystem of the reservoir. After an oil spill, a dense layer of oil ﬁlm forms on the water surface quite quickly, preventing access to air and light (after a spill of one ton of oil, an oil slick about 10 mm thick forms on the surface of the reservoir after 10 minutes). As a result, the fauna and ﬂora of the reservoir suﬀer. If the accident occurred in the coastal zone near a populated area, then the toxic eﬀect is enhanced, because petroleum products in combination with various pollutants of human origin can form dangerous compounds. For high-risk areas (the main routes of transportation of petroleum products, places of their bunkering and unloading, etc.), it is necessary to predict various scenarios for the spread and transformation of oil pollution, taking into account their multifractional composition, turbulent diﬀusion and advective transport, destruction under the inﬂuence of natural factors. The aim of the work is to build a linearized non-stationary spatially heterogeneous mathematical model of transport and transformation of oil pollution, taking into account the above factors.

Materials and Methods. The oil that has entered the aquatic environment is represented as a surface and suspended substance in the water column. Oil is subject to a variety of transformation processes: advection, gravitational spreading, emulsiﬁcation, dispersion, dissolution, biodegradation, etc. The study of these processes and their forecasting, as a rule, requires the development of mathematical and software. In mathematical and numerical modeling, one should start from the system of Navier-Stokes equations and continuity equations, as well as introduce additional physical tolerances of the ﬂow geometry, acceptable and justiﬁed in each case, as shown by world experience and objective analysis of the physical picture of processes. Mathematical modeling of the oil distribution process in coastal marine systems has been performed.

Results. Mathematical oil distribution model has been created, taking into account its multifractional composition. It is assumed that oil fractions can be in water in dissolved or undissolved states. The modeling takes into account such physical characteristics of particles as density, acceleration of gravity, molar mass, etc. After the linearization of the problem under consideration, diﬀerence schemes using extended uniform grids were constructed.

Discussion and Conclusion. Pollution caused by an oil spill in the aquatic environment occurs very quickly and is often very destructive. An important factor will be prompt response, which plays a crucial role in minimizing its negative consequences. Modeling of the oil spill process can be useful for determining the location and condition of oil at sea, conducting a risk analysis of the spread of the substance and developing measures to localize and eliminate pollution.
Vendula Hingarová, Zdenko Maršálek: Posláni na sever: Češi na nucené práci v Norsku
Authors: Liška Martin
Published: January 2024

Book review.
Pengaruh Total Asset Turnover (TAT), Kualitas Aktiva Produktif (KAP) terhadap Profitabilitas (ROA) dengan Non Performing Financing (NPF) sebagai Variabel Moderasi pada Bank Umum Syariah di Indonesia Periode 2018-2022
Authors: Pardede Diah Hafni , Nawawi Zuhrinal M. , Atika Atika
Published: January 2024

Penelitian ini bertujuan untuk mengetahui bagaimana Pengaruh Total Asset Turnover (TAT), Kualitas Aktiva Produktif (KAP) Terhadap Profitabilitas (ROA) dengan Non Performing Financing (NPF) sebagai Variabel Moderasi pada Bank Umum Syariah di Indonesia Periode 2018 - 2022. Variable independen yang digunakan adalah TAT dan KAP, variable dependen yang digunakan pada penelitian ini adalah Profitabilitas (ROA) dan variabel moderasi adalah NPF. Data penelitian yang digunakan adalah data sekunder, tingkat TAT, tingkat KAP dan juga tingkat profitabilitas (ROA) dan didapat dari situs resmi masing-masing Bank Umum Syariah di Indonesia yang telah dipublikasi di  Otoritas Jasa Keuangan (OJK). Data penelitian ini terdiri dari 30 data yang mana data yang digunakan adalah data tahunan. Metode penelitian yang digunakan pada penelitian ini adalah kuantitatif dengan pendekatan deskriptif. Teknik analisis yang digunakan pada penelitian ini adalah uji secara parsial (uji t), uji secara simultan (uji F), uji koefisien determinasi (R2) dan uji analisis MRA dengan menggunakan alat analisis SPSS Versi 25.00. Hasil penelitian menunjukkan bahwa Variabel TAT tidak berpengaruh positif secara signifikan terhadap ROA. Variabel KAP berpengaruh positif secara signifikan terhadap ROA. Variabel KAP dan TAT berpengaruh secara simultan terhadap ROA. Variabel NPF tidak mampu memoderasi pengaruh TAT terhadap ROA. Variabel NPF tidak mampu memoderasi pengaruh KAP terhadap ROA. Maka variabel KAP dan variabel NPF tidak mampu memperkuat dan memberikan pengaruh yang signifikan pada ROA secara parsial pada penelitian ini.
Pemberian Punishment Bagi Siswa Yang Melakukan Pelanggaran di MAN 2 Pontianak
Authors: Pebriani Pebriani , Ardhita Irma , Padia Syarah , Nurrahmi Hesty
Published: January 2024

Penelitian ini bertujuan  untuk mendekripsikan penyebab siswa Madrasah Aliyah Negeri 2 Pontianak datang terlambat, serta apa saja bentuk punishment yang diberikan oleh guru piket kepada siswa yang melakukan pelanggaran berupa datang terlambat dan bagaimana upaya yang dilakukan oleh  guru BK untuk menyelesaikan permasalahan tersebut. Jenis penelitian yang digunakan adalah kualitatif. Informan pada penelitian ini yaitu siswa kelas XII MAN 2 Pontianak yang melakukan pelanggaran. Pengumpulan data menggunakan model Miles and Huberman. Hasil penelitian yang diperoleh terkait keterlamabatan siswa di MAN 2 Pontianak sejumlah 87 siswa yang datang terlambat 10 diantaranya diberikan punishment berupa membersihkan lingkungan sekolah dan membaca kitab suci Al-quran. Adapun penyebab siswa datang terlambat dikarenakan macet, bangun kesiangan, hujan, bahkan ada yang tidak memiliki motor maka harus menunggu ojek. Upaya yang dilakukan guru BK yaitu ketika siswa terlambat lebih dari dua kali akan di berikan pembinaan berupa konseling individu. Namun, jika siswa terlambat lebih dari lima kali akan diberikan berupa surat panggilan orang tua.
Tradisi Mandi Safar Pada Masyarakat Melayu Kayong Utara
Authors: Djarot Muchammad , Alimin Al Ashadi
Published: January 2024

Aspek kajian dalam penelitian ini mencakup tujuan dan rangkaian pelaksanaan Mandi Safar dan nilai yang terkandung dalam tradisi Mandi. Metode yang digunakan dalam penelitian ini adalah deskriptif kualitatif. Sumber data dalam penelitian ini adalah tokoh adat, tokoh agama. Pengumpulan data menggunakan teknik observasi, wawancara, dan dokumentasi. Berdasarkan hasil dari analisa yang dilakukan, maka hasil dari penelitian ini menyimpulkan tujuan diadakannya tradisi Mandi Safar yaitu untuk menghindari marabahaya (bencana), menjalin silaturahim dan melestarikan nilai-nilai budaya setempat. Tahap persiapan tradisi Mandi Safar diawali dengan musyawarah membentuk panitia khusus, pembuatan ketupat, penulisan daun Andong (Hanjuang). Tahap pelaksanaan diawali dengan pembacaan Sholawat, penggantungan daun Andong (Hanjuang), di aliran sungai, pembacaan doa dan mandi. Tahap penutupan yaitu terdiri dari acara makan bersama, dan diakhiri dengan doa penutup.
Recuperando el patrimonio literario español: los Cuentos espiritistas de Amalia Domingo Soler
Authors: Centelles Peláez Cristina
Published: January 2024

En pleno siglo XIX, Amalia Domingo Soler (1835-1909) se erige como una figura fundamental para el estudio y difusión del espiritismo, además de convertirse en una de las principales defensoras del librepensamiento y de los derechos humanos de los más necesitados y abandonados por la sociedad decimonónica. A través del estudio de sus Cuentos espiritistas se observan las principales ideas de la doctrina espiritista, relacionadas con temas universales tratados desde la óptica de su tiempo y abordados mediante la crítica social. Así, el objetivo de este artículo es recuperar parte del patrimonio literario español de la época, resaltando la vertiente más narrativa y artística de la autora.
Esta espada de sueños en mis manos: la continuidad surrealista de José María de la Rosa en Ausencia (1945)
Authors: Martín Fumero José Manuel
Published: January 2024

En torno a la ecléctica Gaceta de Arte (1932-1936) el surrealismo en lengua castellana vivió uno de sus más intensos momentos de esplendor. La obra de José María de la Rosa (1908-1989), uno de los protagonistas de aquel fervoroso momento, ha quedado un tanto relegada, pues no ha sido reeditada y hoy contamos con escasos estudios críticos sobre la misma. En este estudio queremos mostrar, a través de su primera obra de posguerra, cómo el surrealismo ha sido un eje esencial para entrelazar tanto su escritura como su concepción de la existencia.
La visión de la elipsis en las gramáticas de la lengua castellana decimonónicas de la Real Academia Española
Authors: Castañeda Leticia
Published: January 2024

La elipsis, entendida como un fenómeno de supresión de elementos que se transmiten de un modo implícito, ha interesado desde tiempos muy remotos. En este trabajo analizamos la visión aportada por las Gramáticas de la RAE durante el siglo XIX. Dicho estudio, de tipo contrastivo, se centra en los tres textos que se consideran modelo de las demás (Gómez Asencio, 2008), esto es, las ediciones de 1854, 1870 y 1880. A través de esta comparativa podemos observar la desaparición de las connotaciones peyorativas que previamente el término había tenido y la multiplicación de los ejemplos descriptivos.
Aislamiento de la mujer de entresiglos en dos cuentos de Pardo Bazán
Authors: Aboal López María
Published: January 2024

En estas páginas se analizan dos cuentos de Emilia Pardo Bazán del período de entresiglos —«La niña mártir» (1893) y «La emparedada» (1907)— en los que nos advierte de cómo la represiva realidad femenina de finales del XIX extendía ya sus brazos hacia el nuevo siglo XX. La elección de estos relatos se fundamenta en esa coincidencia simbólica del cautiverio femenino y en el tiempo en que fueron escritos, una época especialmente fascinante de la literatura a la que, una vez más, Pardo Bazán supo unirse, incluso adelantarse, y experimentar con ella de manera magistral: el Fin de Siglo.
Poesía, pensamiento, amor. En torno a Gozos de la vista de Dámaso Alonso
Authors: Menzio Pino
Published: January 2024

La poesía de Dámaso Alonso tiene un considerable valor de pensamiento. El análisis de algunos de los poemas de Gozos de la vista permite constatar cómo, en ellos, la metáfora de la luz se convierte en vehículo de una concepción específica de la poesía, entendida como una forma de amor al mundo. En este sentido, la poesía, coincidiendo con la creación (y la verdad) divina, recorre el universo desde el principio, animándolo y manteniéndolo unido.
Francisco Rico (2022): Lección y herencia de Elio Antonio de Nebrija (al cuidado de Rosa Bono)
Authors: Macías Villalobos Cristóbal
Published: January 2024

Reseña de Francisco Rico (2022): Lección y herencia de Elio Antonio de Nebrija (al cuidado de Rosa Bono)
Ignacio Aldecoa (2023): Novelas completas: El fulgor y la sangre. Con el viento solano. Gran Sol. Parte de una historia
Authors: Jiménez Vega Mercedes
Published: January 2024

Reseña de Ignacio Aldecoa (2023): Novelas completas: El fulgor y la sangre. Con el viento solano. Gran Sol. Parte de una historia
Carmen Formoso (2022): Carmen, Carmela, Carmiña (Fluorescencia)
Authors: López Cobos Azucena
Published: January 2024

Reseña de Carmen Formoso (2022): Carmen, Carmela, Carmiña (Fluorescencia)
Microplastics abundance in domestic wastewater as a pollutant source for the Daroy River, Indonesia
Authors: Fauzi Mhd , Soewondo Prayatni , Darnas Yeggi , Handajani Marisa , Tedjakusuma Teddy , Nizar Muhammad , Muna Cut R. , Nur Ansiha
Published: January 2024

Domestic wastewater in Gampong Garot, Aceh Besar Regency, Aceh Province, Indonesia is directly discharged to the Daroy River without any treatment process. Domestic wastewater from Gampong Garot has been one of the contributors to microplastics contamination in the Daroy River. The microplastics (MPs) contained in domestic wastewater might come from used soaps and detergent products, as well as the scouring of clothes during washing. Thus, this study aims to investigate the abundance of MPs in domestic wastewater in Gampong Garot. The sampling points were determined based on purposive sampling, with samples taken at the end of the main pipe that directly leads to the Daroy River. Organics in domestic wastewater were removed using 30% H 2O 2 liquid through a digestion process at a temperature of 75°C. MPs characteristics such as size, shape, and colour were visually analysed using a light binocular microscope at 100× magnification, while the polymer type was analysed using Fourier transform infrared (FTIR) analysis. The concentration of MPs in domestic wastewater in Gampong Garot was 30.238 ±1.228 particles∙(100 cm) –3 sample. The most common sizes of MPs were found to be in the range of 1,001–5,000 μm, while the dominant colour and shape were transparent and fibre-like. Polyester (PES) was the most detected type of MPs. These findings highlight the need for wastewater treatment before discharge into aquatic bodies.
GIS and geodata contribution to the cartographic modelling of blue-green infrastructure in urbanised areas
Authors: Czyża Szymon , Kowalczyk Anna M.
Published: January 2024

The development of cities and peri-urban areas is exerting an increasingly strong impact on the natural environment and, at the same time, on the living conditions and health of people. Problems and challenges that need to be addressed include increasing air pollution in these areas, formation of a surface urban heat island (SUHI), water management disruptions (water scarcity or excess), and the destruction of natural habitats. One of the solutions that contributes to climate change mitigation is the introduction of blue-green infrastructure into the city space and urbanised areas. The research objective was to identify spatial features (geodata) that determine the optimum location of selected blue-green infrastructure (BGI) components, acquire them, and then use the Geographical Information System (GIS) to determine their optimum locations. As the first step, cartographic models were developed which indicated areas that enable the development of selected blue-green infrastructure components in the Olsztyn city area, Warmińsko-Mazurskie Province, Poland. The models were juxtaposed with other two models developed by the authors, i.e. a surface urban heat island model and a demographic model that showed the age structure of the city’s population. Consequently, maps with potential locations for the blue-green infrastructure were developed, while taking into account reference data from the National Land Surveying and Cartographic Resource and Landsat 8 images.
Coastal zone, key area for adaptation to sea level rise. The Gulf of Gdansk case
Authors: Zielinski Tymon , Piwowarczyk Joanna , Koroza Aleksandra
Published: January 2024

Climate change and its consequences, including rising ocean temperature and sea level rise are well scientifically documented. The changes are especially severe for coastal communities, which are estimated to have reached c. 50% of the world’s population. Using an example of the Gulf of Gdansk region, which is of European importance, due to the presence of two major Baltic ports and global tourism, we explore, how sea related threats may affect the region and we analyse how the three major cities are prepared to these threats. The four city developmental strategies and an additional document, an “umbrella strategy” focusing on climate change threats do not consider sea level rise and more frequent storm surges as threats. The sea level rise is briefly discussed in the fourth document. The adaptation plan, an appendix to the document, mentions sea level rise, but the discussion of the problem is indirect and involves some examples of adaptation actions in loosely similar environmental conditions. The adaptation plan, in fact includes a list of possible threats, rather than a detailed discussion of the suggestions of the measures to be undertaken. For comparison, we present a multilevel approach, which is effectively run in the Port of Rotterdam and argue that such approach should be undertaken in the studied region. We conclude that despite years of education on climate change, the problem is still not recognised and is underrepresented in practical measures of the studied region. We also provide hints on how to overcome this situation.
Predictions of hazardous plastic waste amounts based on disposable face mask wearing habits
Authors: Cesoniene Laima , Simanaviciute Raimonda , Sileikiene Daiva , Bedla Dawid
Published: January 2024

Since March 11, 2020, the global community has faced the challenges of the COVID-19 pandemic. In response, numerous countries, including the Republic of Lithuania, mandated the wearing of face masks to curb the virus’s spread. Yet, a section of the Lithuanian populace resisted this move, voicing concerns about the inconvenience of mask-wearing and potential privacy infringements. These concerns endured, even amidst debates on the masks’ effectiveness. This article explores how the Lithuanian public responded to mask-wearing protocols during the pandemic. Survey analysis highlighted a troubling trend: many individuals dispose of face masks with their regular trash, often without proper packaging. Most masks are sourced from pharmacies or are provided by employers and are typically thrown away after just one day of use. The data underscores a significant knowledge gap in correct mask disposal, as a significant portion ends up mingled with general household waste, without proper containment. Moreover, many people keep used masks in pockets or bags. Notably, during the pandemic, an estimated 2 mln adult Lithuanians may have generated roughly 15.24 Mg of hazardous plastic waste through mask disposal.
Changes in the Quality of Plain Yogurt Made From Cow’s, Goat’s, and Sheep’s Milk Within the Shelf Life
Authors: Daszkiewicz Tomasz , Kocenka Sylwia , Miciński Jan
Published: January 2024

The aim of this study was to compare selected physicochemical properties, the fatty acid profile, and the content of vitamins A and E in plain yogurt (Y) made from cow’s (YC), goat’s (YG), and sheep’s milk (YS), and to monitor changes in these parameters within the shelf life of the analyzed products. The products were supplied by three manufacturers. Each group consisted of yogurts from three different batches, and each batch was represented by two products. The quality of the first product was analyzed in the middle of shelf life, and the quality of the second product was analyzed at the end of shelf life (E, last day). The products were stored at a temperature of 4○C until analysis. An analysis performed at date M demonstrated that YC had the highest (p ≤ 0.05) values of yellowness (b*) and titratable acidity, and the lowest (p ≤ 0.05) content of vitamins A and E; YG had the highest (p ≤ 0.05) values of redness (a*) and the lowest (p ≤ 0.05) value of b*; YS had the highest (p ≤ 0.05) values of lightness (L*) and pH, the highest (p ≤ 0.05) content of vitamins A and E, and the lowest (p ≤ 0.05) values of a* and titratable acidity. YC and YS were characterized by higher (p ≤ 0.05) values of chroma (C*) than YG. YC and YG were characterized by higher (p ≤ 0.05) values of UFA/SFA, MUFA/SFA, DFA/OFA, and n-6/n-3 PUFA ratios, compared with YS. The n-6/n-3 PUFA ratio was also higher (p ≤ 0.05) in YG than in YC. In comparison with YC, YG and YS had higher (p ≤ 0.05) values of the PUFA/SFA ratio and EFA concentrations, and the highest (p ≤ 0.05) values were noted in YS. Measurements conducted at date E revealed a decrease (p ≤ 0.05) in the value of a* and vitamin E content in YC, an increase in the value of L* in YG, and an increase in the value of a*, a decrease in the values of b*, C* and pH, and a decrease in vitamin E content in YS. Titratable acidity increased (p ≤ 0.05) in all types of Y. Changes in the nutritional value of fat (a decrease in the values of UFA/SFA, MUFA/SFA, and PUFA/SFA ratios, a decrease in EFA concentrations, and an increase in the n-6/n-3 PUFA ratio) were significant (p ≤ 0.05) only in YC. The results of the study indicate that YG was characterized by the highest stability, and YC was characterized by the lowest stability during storage.
Isolation of citronellal and geraniol from citronella (Cymbopogon winterianus) oil by vacuum fractional distillation: Effect of operating conditions on the separation
Authors: Le Minh-Trung , Vu Duc-Phuong , Nguyen Thanh Ngoc , Le Xuan-Tien
Published: January 2024

This study used fractional distillation to separate citronellal and geraniol from citronella (Cymbopogon winterianus) essential oil to improve their market value. The one-factor-at-a-time methodology investigated operating parameters’ optimum conditions and effects, including system pressure, packing types, and column height. All investigations were evaluated based on their main fraction’s citronellal and geraniol content and recovery. Regarding the effect of the variables, a higher system pressure improved the separation while increasing the temperature range of each fraction and distillation time. The packing types would also improve the separation by providing a large surface area. Finally, the column height also positively impacted the separation. In the optimum citronella oil fractionation, citronellal content experienced a 2.5-fold increase, from 37.68% to 94.33%. Geraniol purity reached 40.61% from an initial content of 17.33% in the raw CW oil. The distillation could recover up to 90.00% of citronellal and 68.18% of geraniol.
Modelling the Impact of Crude Oil Prices and Stock Price Index on Indonesia’s Exchange Rates
Authors: Raji Jimoh Olajide , Adeel-Farooq Rana Muhammad , Oyewole Tajudeen Toyin
Published: January 2024

This paper employs various GARCH-type models and the daily data from 3 July 2006 to 30 June 2021 to examine the effect of crude oil prices and stock price index on exchange rates for Indonesia, the largest oil producer in Southeast Asia. Since the share markets and oil prices are very volatile, testing the stability of the parameters or system is desirable. We achieve this by using the Nyblom’s fluctuations test and account for the structural break associated with the fluctuations. Findings reveal that lower oil price return leads the Indonesian currency per US dollar to depreciate. In addition, we find that stock return has negative and significant relation with exchange rates. This lends support to the portfolio balance effect in which a decrease in stock prices leads to a depreciation of Indonesian Rupiah against the US dollar. Evidence from EGARCH model shows that shocks to the volatility of exchange rate have a symmetrical effect. Our results suggest that as lower oil prices and stock prices contributes to depreciation of Indonesia rupiah against USD, an appropriate monetary policy may require adjustment of interest rates to resist the exchange rate fluctuations without being detrimental to the banking system.
Curricular Relevance and Workforce Preparedness: Student Perspectives on Practical Experiences in Urban Planning and Construction Courses
Authors: Stan Mari-Isabella , Țenea Diana-Doina , Vintilă Dragoș-Florian , Tasențe Tănase
Published: January 2024

This study conducted at Ovidius University of Constanta, Romania, examines the integration of practical experiences into urban planning and construction curricula, involving 318 students from Construction, Law, and Administrative Sciences faculties. The study stresses the significance of these experiences in preparing students for the workforce, while assessing their perspectives on the relevance of their courses to future careers, with a particular emphasis on the influence of internships and real project involvement. The findings suggest that students who engage in practical activities view their courses as more relevant to their career advancement. This pattern is consistent across an array of courses, with various statistical analyses revealing degrees of significance. The study underscores the need of aligning educational programmes with labour market standards and professional requirements, particularly within fields that emphasise practical competencies. It also highlights the essential roles of construction engineers and public administration professionals, emphasizing the importance of understanding practical and legal aspects in their education.
Upaya berkelanjutan: peningkatan pupuk kompos plus berbasis limbah nilam dan abu sekam padi di Gampong Teungoh Geunteut, Aceh Besar (Sustainable efforts: enhancing compost plus fertilizer based on patchouli waste and rice husk ash in Teungoh Geunteut Village, Aceh Besar)
Authors: Bashair Fathul , Rida Muhammad Rasyid , Idrus Nabila Fardina , Malau Anisa , Aprilia Sri , Umam Muhammad Khalil
Published: January 2024

Teungoh Geunteut Village is one of the enormous patchouli cultivation centers in Aceh. The high quality of the patchouli oil produced creates great potential for the community to carry out agriculture. However, the large number of patchouli farmers in Teungoh Geunteut Village has resulted in a massive accumulation of patchouli waste thrown out from distillation using steam boilers. The patchouli waste has not yet been utilized properly, resulting in environmental problems. To overcome the uncontrolled accumulation of patchouli waste, PKM-PM teams took the initiative to utilize the patchouli waste into compost plus fertilizer. Compost plus fertilizer can overcome environmental problems and be an alternative solution to replace the undersupply of subsidized fertilizer the government provides. Producing compost plus fertilizer can be enhanced by adding bio silica from rice husk ash. Bio silica contained in rice husk ash has an important role in absorbing the nutrients plants need to initiate quality compost plus fertilizer. The service activities were carried out in August-September 2023 in Teungoh Genteut Village on one of the residents' lands. In carrying out this activity, the team carried out 3 series of stages, namely: (1) socialization on making compost plus fertilizer, (2) direct practice on making solid and liquid compost plus fertilizer, and (3) packaging compost plus fertilizer. The results achieved in this activity are solid and liquid compost fertilizer products that can be used as commercial materials to improve the economy of the Teungoh Geunteut community. Apart from that, this service activity can be used as a forum to increase residents' knowledge and understanding regarding the processing of agricultural waste into compost and techniques for marketing strategies.
Front Matter
Authors: Team Editorial
Published: January 2024

Buletin Pengabdian: Bulletin of Community Services (Bull. Community. Serv.) is a scientific journal that publishes articles on research related to community engagement practices and processes, carried out by academia, government, private sector and industry. These manuscripts can originate from community service activities ("PENGMAS"), the student study service (Kuliah Kerja Nyata or KKN), technical guidance, models or concepts and or other implementations in order to increase community participation in development and community empowerment.Buletin Pengabdian is a peer-review process journal that has been registered and indexed by ISSN  2775-958X (print) and 2807-3975 (online), Directory of Open Access Journal (DOAJ), CAB Abstracts, EBSCO, Google Scholar, Dimensions, Member of Crossref (DOI), WorldCat, Garuda, Oulu University Library, and other scientific databases.Bull Community Serv is published by the Institute for Research and Community Services (LPPM) Universitas Syiah Kuala (USK) and is published periodically THREE times a year, April, August, and December. This journal is published through a peer-reviewed process by experts from various institutions and various fields of science.
Developing Number Puzzle Learning Media for Elementary School Dyslexic Students: Single Subject Research
Authors: Ismail Sumarno , Bito Nursiya , Oroh Franky Alfrits , Yahya Nisky Imansyah , Talibo Fuzi Sandra
Published: January 2024

A child displaying symptoms of dyslexic learning disorders requires assistance in accurately identifying numbers, particularly those that share resemblances. This research aimed to develop media for teaching dyslexic children to help them identify numbers correctly. This research employed a development and single-subject research method. The subject was a child with symptoms of dyslexia learning disorders from primary school in Gorontalo, Indonesia. The research instruments used were observation sheets and media validation. The findings revealed that prior to engaging with the puzzle activity, the dyslexic student demonstrated the capability to identify a range of 4 to 5 numbers accurately. However, after participating in the puzzle activity, the dyslexic student exhibited an improved performance, achieving the ability to correctly recognize and recall 8 to 10 digits in both writing and memory. The number puzzle media was developed by dividing the puzzle into two parts: the part of the screen containing the complete picture and the base placing the puzzle pieces. The puzzle pieces were made by stacking several formed duplex parts, then covered with paper glued together to create a waterproof product. The puzzle focused on the numbers contrasting in color. The numbers were divided into several parts to make it easier for dyslexic students to identify models of these numbers. After conducting media testing on a dyslexic student, the analysis demonstrated a positive impact of the media on learning outcomes. This research suggests a notable improvement in the numerical identification skills of the dyslexic student
Metacognition Knowledge of High School Students in Solving Limit of Functions Problems Viewed from Mathematical Ability
Authors: Pathuddin Pathuddin , Marzuki Intan Purnama , Anggraini Anggraini , Mallo Bakri , Sukayasa Sukayasa
Published: January 2024

The involvement of metacognition in the problem-solving process is paramount. This study aims to obtain a description of the metacognition knowledge of high school students in solving limit of functions problems. This type of research is qualitative descriptive research. The subjects of this study were two students who had high and low mathematical abilities. Data from the results of written assignments and in-depth interviews. The results showed that students with high mathematical abilities in solving limit of functions problems involved the metacognition knowledge they had at each stage of Polya, starting from their declarative, procedural, and conditional knowledge. The subjects with low mathematics at the stage of understanding the problem involved only their declarative knowledge. The step of making a plan involves the declarative knowledge their memory and their procedural knowledge, although incomplete in compiling the ideas. The step of carrying out the plan involves all three knowledge of metacognition that he possesses, while the stage of re- examining involves only his declarative knowledge and his conditional. The results of this research can be a reference in designing limits learning in high school.
Mathematics Teacher Competencies and Self-Efficacy in Implementing National Curriculum
Authors: Radite Ramadian , Retnawati Heri
Published: January 2024

The new Indonesia National Curriculum, the Merdeka Curriculum, was officially implemented in the 2022/2023 academic year. There are differences between public and private schools regarding facilities and teachers' employment status. Most teachers in public schools are Civil Servants (CST), while most private teachers are non-CST. This research analyzes the mathematics teachers' competence and self-efficacy of CST and non-CST in implementing the Merdeka Curriculum. This research used mixed methods of survey correlational and expos facto. The number of teacher respondents attained by purposive sampling was 34 CST and 54 non-CST. Teachers' competence data were collected using multiple-choice tests on professional and pedagogical competence. Self-efficacy data were collected using a questionnaire adapted from Bandura, while factors causing teachers' self-efficacy were collected using interviews. The research finding shows that in implementing the Merdeka Curriculum, (1) teachers' competence from both teachers' group was low, whereas self-efficacy were moderate, (2) there is no difference in competence between CST and non-CST, but there are differences in self-efficacy, and (3) factors that affect the differences in the self-efficacy are beliefs towards the success of implementing Merdeka Curriculum, support from the headmaster and the government, salary eligibility, and difficulties aspects.
Didactical Design with Problem Posing to Overcome Epistemological Obstacles in Problem Solving
Authors: Eka Firmina , Sugiatno Sugiatno , Munaldus Munaldus , Hamdani Hamdani , Sayu Silvia
Published: January 2024

Problem-solving activities allow students to apply mathematical knowledge and connect other mathematical abilities more deeply. However, based on the situation in the field, students still experience epistemological obstacles in solving problems on Straight Line Equation material, especially issues in story form. This study aims to overcome students' epistemological obstacles in problem-solving using didactic design with a problem-posing approach. This research is qualitative research with a didactical design research method. Six students at one of the schools in West Kalimantan, Indonesia, were the subjects of this research. Tests, interviews, and observation guidelines were used as data collection instruments. The research data obtained were analyzed, reduced, and presented in narrative form. The results showed that epistemological obstacles can be overcome after implementing didactic design with problem posing. This finding has the same pattern as previous research findings, although on different materials and scaffolding. Therefore, didactical design with problem posing can be used as one of the alternative learning designs for straight-line equation material in the classroom.
ANALISIS FAKTOR YANG MEMPENGARUHI PENGELUARAN DI DAERAH TUJUAN, JUMLAH REMITAN PEDAGANG KAKI LIMA KECAMATAN MENGWI
Authors: Shidqy Aufa Rafiv , Sudibia I Ketut
Published: January 2024

The purpose of this study was to analyze the direct effect of income, the number of dependents in the destination area, and the presence of nuclear family members in the area of origin on expenditure in the destination area and the amount of remittances, as well as the indirect effect through expenditure in the destination area of street vendors in Mengwi District. Location this research in Mengwi District, Badung Regency. Sample technique uses accidental sampling as 80 samples. Data analysis technique used path analysis with the SPSS program. Results are income has significant positive on expenditure in destination area and the amount remittances. Number of dependents and presence of nuclear family members in area of origin don’t have significant effect on expenditure in destination area. Number of dependents has a significant negative effect on the amount of remittances. Presence of nuclear family members did not significantly affect the amount of remittances. Expenditure in destination area has significant negative effect on the amount of remittances from street vendors in Mengwi District. Income has partial indirect effect on the amount of remittances through spending in the destination area. Meanwhile, the number of dependents in the destination area and the presence of nuclear family members are not.

Keywords: Income, Number of Dependents, Existence of Nuclear Family Members, Expenditures, Remittances
ANALISIS PENGARUH PAD, INVESTASI DAN BELANJA DAERAH TERHADAP TINGKAT KEMISKINAN DI KABUPATEN/KOTA PROVINSI BALI
Authors: Anggada IGN Dharma
Published: January 2024

Poverty is a fundamental case that is experienced in every region in the Province of Bali which is of course the shared responsibility of both the regional government, the private sector as well as individual communities. The purpose based on this research is to analyze the impact of PAD, investment & regional expenditure on poverty levels in the Regency/City of the Province of Bali. The data source used is secondary data for 2016-2020. This research uses multiple linear regression analysis technique in the form of panei data. The resuIts according to this study show that PAD, investment & regional expenditure simultaneously affect the level of poverty in the Regency / City of Bali Province. For PAD & investment partially negative & insignificant effect on the poverty level in the Regency / City of Bali Province. Meanwhile, regional expenditure partially has a negative & significant effect on the poverty level in the Regency/City of the Province of Bali.
PENGARUH PELATIHAN DAN PENGGUNAAN TEKNOLOGI TERHADAP PRODUKTIVITAS DAN KEBERLANJUTAN UMKM DI KOTA DENPASAR
Authors: Andiana I Kadek Agus Krisna , Yuliarmi Ni Nyoman
Published: January 2024

The COVID-19 pandemic has brought great challenges to the development of the economic sector, especially in maintaining the sustainability of MSME businesses. The purpose of this study was to analyze and determine the effect of training and use of technology on the productivity of MSMEs in Denpasar City; the effect of training, use of technology and productivity on the sustainability of MSMEs in Denpasar City, productivity in mediating the effect of training and use of technology on the sustainability of MSMEs in Denpasar City. The data source is primary data by conducting a questionnaire as many as 100 MSME actors with a proportionale stratified random sampling method. The data analysis technique is path analysis technique. The results of this study indicate that the variables of training and the use of technology have a positive and significant effect on the productivity of MSMEs in Denpasar City. The variables of training, use of technology and productivity have a positive and significant impact on the sustainability of MSMEs in Denpasar City. Productivity mediates the effect of training and use of technology on the sustainability of MSMEs in Denpasar City.

 

Keywords: Training, Use of Technology, Productivity, MSME Sustainability.
PENGARUH PERTUMBUHAN PENDUDUK, TINGKAT PENDIDIKAN, DAN UPAH MINIMUM KABUPATEN/KOTA (UMK) TERHADAP PERTUMBUHAN EKONOMI KABUPATEN/KOTA DI PROVINSI BALI
Authors: Banyuning I Gusti Agung Gede Bayu , Yasa I Nyoman Mahaendra
Published: January 2024

The economic growth of the Province of Bali shows a fluctuating disparity between regencies/cities, and even tends to slow down every year. The purpose of this study is to analyze the effect of population growth, education level, and district/city minimum wages simultaneously and partially on the economic growth of districts/cities in Bali Province and the dominant variables affecting district/city economic growth in Bali Province. The data used is secondary data in 9 districts/cities in Bali Province in the period from 2015 to 2019 (5 years), so the number of observations is 45. The analytical technique used is multiple linear regression analysis. The results showed that population growth, education level and the district/city minimum wage simultaneously had a significant effect on economic growth. Population growth partially has a negative and significant effect, while the level of education and minimum wages partially has a positive and significant effect on economic growth. The district/city minimum wage is the variable has dominant influence on the economic growth of districts/cities in Bali Province. It is hoped that the government will more evenly distribute development between regions through the construction of new growth centers in all regions in accordance with the potential of each region, in addition to paying attention to the education budget so that it tends to increase according to applicable regulations, namely at least 20 percent of the APBD, and companies must be more committed in implementing wages so that workers can maximize their work.

Keywords: Population Growth, Education, Minimum Wage, Economic Growth