168 research outputs found
Lithofacies and depositional environment spanning the Cretaceous-Paleogene boundary on the New Jersey coastal plain
No full textThe sedimentary record spanning the Cretaceous-Paleogene (K/Pg) boundary was examined in outcrop and in seven cores recovered from a 50 km long transect along the outcrop belt on the New Jersey coastal plain. The objectives were to: (1) conduct a high-resolution study of the K/Pg lithofacies, (2) document spatial and temporal changes in composition and texture of the sediments, and (3) interpret any changes in the depositional environment across this important geological boundary when a mass extinctions occurred. Analyses include core description, textural, petrographic, microprobe, and XRD analyses. Five lithofacies were interpreted in the Upper Cretaceous sediments and three lithofacies were recognized from the lowermost Paleogene deposits. Microprobe studies show the chemistry of Upper Cretaceous and lowermost Paleogene glauconite are identical (~7-8% K2O), but their color difference may suggest different redox condition. XRD analyses show the Upper Cretaceous clay contains more land-derived detritus than the lowermost Paleogene clay. The following sequence of events is interpreted from the sediment record spanning the K/Pg boundary: (1) deposition in near-shore setting and slow sedimentation in middle shelf when sea level was falling, albeit still shelfal depth; (2) deposition of K/Pg lithofacies when sea level was falling possibly creating a diastem but not a sequence boundary, per se; (3) a transgression above the K/Pg boundary; and (4) deposition in middle shelf possibly with decreased ocean productivity and a more reducing environment. There is no sedimentological evidence above the K/Pg boundary, suggesting tsunami-related deposition associated with a bolide impact. Either a tsunamite was eliminated by bioturbation, or NJCP was too far from the impact site to be affected. A transgressive lag, instead, was formed by normal sedimentation during the subsequent transgression in the early Paleocene.M.S.Includes bibliographical referencesby Hendra Wahyud
The Advantages of Artificial Intelligence in Operational Decision Making
No full textThis research paper explores the advantages of artificial intelligence (AI) in operational decision making, focusing on the analysis of production processes, supply chains, and resources. The research highlights several advantages of AI in operational decision making. It empowers organizations to make data-driven decisions, reducing reliance on human intuition and biases. AI technologies can process vast amounts of data in real-time, enabling timely decision-making and facilitating agile operations. Moreover, AI can learn from historical data and continuously improve decision-making processes, leading to enhanced performance over time. The research method employed in this study is utilizing literature review as the data collection method. The literature review involved searching for relevant theories and examining findings from previous researchers, which served as the foundation for developing the analysis to discuss the research outcomes. This research underscores the significant advantages of AI in operational decision making, specifically in the areas of production processes, supply chains, and resource management. By leveraging AI technologies, organizations can achieve improved efficiency, reduced costs, and better overall performance. The findings of this study contribute to a better understanding of the transformative potential of AI and encourage its adoption in various operational domains
Analysis of Hendra Virus Fusion Protein N-Terminal Transmembrane Residues
No full textHendra virus (HeV) is a zoonotic enveloped member of the family Paramyoxviridae. To successfully infect a host cell, HeV utilizes two surface glycoproteins: the attachment (G) protein to bind, and the trimeric fusion (F) protein to merge the viral envelope with the membrane of the host cell. The transmembrane (TM) region of HeV F has been shown to have roles in F protein stability and the overall trimeric association of F. Previously, alanine scanning mutagenesis has been performed on the C-terminal end of the protein, revealing the importance of β-branched residues in this region. Additionally, residues S490 and Y498 have been demonstrated to be important for F protein endocytosis, needed for the proteolytic processing of F required for fusion. To complete the analysis of the HeV F TM, we performed alanine scanning mutagenesis to explore the residues in the N-terminus of this region (residues 487–506). In addition to confirming the critical roles for S490 and Y498, we demonstrate that mutations at residues M491 and L492 alter F protein function, suggesting a role for these residues in the fusion process
RETRACTION: Analisis Fungsi Harian Serambi Indonesia pada Masyarakat Desa Doy Kecamatan Ulee Kareng Kota Banda Aceh
No full textRETRACTION TO:Jailani, A., Hendra, Y., & Priadi, R. (2020). RETRACTION: Analisis Fungsi Harian Serambi Indonesia pada Masyarakat Desa Doy Kecamatan Ulee Kareng Kota Banda Aceh. JURNAL SIMBOLIKA: Research and Learning in Communication Study, 6(2), 96-106. doi:https://doi.org/10.31289/simbollika.v6i2.3635This article has been retracted by the publisher based on the following reason:This is based on the editor that the author has committed acts of violation of publication ethics. The author has published a triple publication by submitting the same article to one journals before and one journal after. The author admits that he forgot to have submitted the same article to another journal. This article also has published in the1. Jurnal Ilmiah Komunikasi CommuniqueJAILANI, A., Hendra, Y., & Priyadi, R. (2020). Analisis Implementasi Fungsi Media Massa Pada Harian Serambi Indonesia. Jurnal Ilmiah Komunikasi Communique, 2(2), 85-93. Retrieved from http://ejurnal.stikpmedan.ac.id/index.php/JIKQ/article/view/282. PERSEPSI: Communication Journal, Vol .3 No. 2, 2020, 103-112, DOI: 10.30596/persepsi.v%vi%i.4447(Analisis Fungsi Harian Serambi Indonesia Pada Masyarakat Desa Doy Kecamatan Ulee Kareng Kota Banda Aceh | Jailani | Persepsi: Communication Journal (umsu.ac.id)One of the conditions of submission of a paper for publication in this journal is that authors declare explicitly that their work is original and has not appeared in a publication elsewhere, and also not considered by another journal. As such this article represents a severe abuse of the scientific publishing system. The scientific community takes a very strong view on this matter, and apologies are offered to readers of the journal that this was not detected during the submission dan publication process
RETRACTION: Analisis Fungsi Harian Serambi Indonesia pada Masyarakat Desa Doy Kecamatan Ulee Kareng Kota Banda Aceh
No full textRETRACTION TO:Jailani, A., Hendra, Y., & Priadi, R. (2020). RETRACTION: Analisis Fungsi Harian Serambi Indonesia pada Masyarakat Desa Doy Kecamatan Ulee Kareng Kota Banda Aceh. JURNAL SIMBOLIKA: Research and Learning in Communication Study, 6(2), 96-106. doi:https://doi.org/10.31289/simbollika.v6i2.3635This article has been retracted by the publisher based on the following reason:This is based on the editor that the author has committed acts of violation of publication ethics. The author has published a triple publication by submitting the same article to one journals before and one journal after. The author admits that he forgot to have submitted the same article to another journal. This article also has published in the1. Jurnal Ilmiah Komunikasi CommuniqueJAILANI, A., Hendra, Y., & Priyadi, R. (2020). Analisis Implementasi Fungsi Media Massa Pada Harian Serambi Indonesia. Jurnal Ilmiah Komunikasi Communique, 2(2), 85-93. Retrieved from http://ejurnal.stikpmedan.ac.id/index.php/JIKQ/article/view/282. PERSEPSI: Communication Journal, Vol .3 No. 2, 2020, 103-112, DOI: 10.30596/persepsi.v%vi%i.4447(Analisis Fungsi Harian Serambi Indonesia Pada Masyarakat Desa Doy Kecamatan Ulee Kareng Kota Banda Aceh | Jailani | Persepsi: Communication Journal (umsu.ac.id)One of the conditions of submission of a paper for publication in this journal is that authors declare explicitly that their work is original and has not appeared in a publication elsewhere, and also not considered by another journal. As such this article represents a severe abuse of the scientific publishing system. The scientific community takes a very strong view on this matter, and apologies are offered to readers of the journal that this was not detected during the submission dan publication process
Popularity, media and electability: study of Alfiansyah Komeng in the election of members of the Regional Representative Council (DPD) in West Java / Hendra, Mudiyati Rahmatunnisa and Ratnia Solihah
No full textIn 2024 Indonesia will again hold general elections to fill executive and legislative positions. One of the legislative member elections was to elect members of the Regional Representative Council (DPD) as the institution representing each province in Indonesia. An interesting phenomenon in this election was Alfiansyah Komeng's election as a DPD member representing West Java Province, surpassing the other candidates with the highest vote acquisition of 5,399,699 votes. Using a qualitative approach and data collection techniques through literature studies, the results showed that Komeng's electability was based on popularity, integrity, people's dissatisfaction with conventional politics, photos on ballot papers and the benefits of holding elections simultaneously. Meanwhile, according to the author, the media and the message conveyed are minor factors in Komeng's choice
Development of Mathematics Learning Media Based on Discovery Learning Integrated with Inderapura Culture to Improve Mathematical Problem Solving Ability for Junior High School Student of Grade VIII
No full textBased on the preliminary analysis conducted at SMP Negeri 2 Pancung , the students' mathematical problem solving ability was still low. The low ability of students to solve mathematical problems caused by (1) teachers do not use worksheet in the learning process, (2) The learning process that has not facilitated students to construct their own knowledge. Based on this problem, researchers developed mathematical learning media based on discovery learning integrated with Inderapura culture to improve students' mathematical problem solving abilities.This research was a development research conducted with the Plomp development model. This model was carried out in 3 stages. In the first stage was the preliminary research phase and it was needs analysis, curriculum analysis, student analysis and concept analysis. In the second stage was the development or prototype phase which was designed in accordance with the integrated learning discovery model of Inderapura culture. In the third stage was the assessment phase which aimed to see the effectiveness of learning media by conducting large group field tests. The subjects of this study were the eighth grade students of SMPN 2 Pancung Soal. Data collected by documentation, observation, interviews, questionnaires, and tests. Data from observations, questionnaires and tests were analyzed quantitatively and strengthened by the results of the documentation analyzed descriptive qualitative.The results showed that mathematics learning media in the form of lesson plan andworksheet based on discovery learning integrated with Inderapura culture for grade VIII in the second semester of Junior High School were produced by fulfilling valid, practical and effective categories. Validity was tested in terms of content, usage, language and graphics. Applicable in terms of application, time, ease of use and effective in terms of potential impacts on students' mathematical problem solving abilities. The conclusion was mathematics learning mediawas feasible to be used as reference material in mathematics learning, especially materials for constructing flat side spaces in gradeVIII of SMP N 2 Pancung
Movement Ecology of the Black Flying Fox (Pteropus alecto) in a Changing Landscape: Implications for Hendra Virus Spillover in Eastern Australia
No full textHistorically nomadic, black flying foxes (Pteropus alecto) traveled hundreds of kilometers across the landscape in search of seasonally ephemeral plant food resources. Land clearing has decreased native habitat of P. alecto in coastal eastern Australia and increased seasonal variability in native food sources, driving flying foxes into continuously-occupied roosts in and around urban areas. As a natural host for Hendra virus, understanding P. alecto movement is critical to understanding Hendra virus and its transmission and spillover dynamics. High densities of smaller roosts, along with consistent resources temporally, led us to hypothesize that bats in urban roosts would forage closer to the roost sites than previously recorded for bats at non-urban roosts. However, we expected that bats would exhibit seasonally variable movements, especially as native resources are increasingly unavailable in winter months. We investigated foraging distances, track tortuosity, and foraging ranges, by tracking 76 adult P. alecto from two continuously occupied roosts using GPS-GSM trackers. One roost is in a highly urbanized area, and the other is in a peri-urban area, adjacent to native habitat. We collected 883 bat-nights of tracking data (722 foraging nights and 161 roost-switching nights) throughout 2019–2021. Although we observed occasional extreme nightly movements (up to 218.27 km), most nightly foraging distances and maximum displacement calculations from the roost were comparatively short (mean 7.0 ± 5.0 km). Bats travelled longer distances when foraging from the peri-urban roost, with individual mean track lengths ranging from 8.7 – 51.6 km compared to 3.7 – 44.4 km at the urban roost. Bats from the urban roost predominantly foraged locally in developed areas, whereas bats from the peri-urban roost displayed a mixed foraging strategy, exploring developed, agricultural, and native landscapes. Understanding foraging movements of urban resident flying foxes can help prevent human-wildlife conflicts and promote coexistence in and around increasingly urban environments. Insight into how the movement ecology and foraging behaviors of P. alecto could affect Hendra virus spillover and dynamics in this system could also further help us understand other zoonotic diseases globally.Embargo status: Restricted until 01/2174. To request the author grant access, click on the PDF link to the left
Magnetotelluric (MT) data smoothing based on B-Spline algorithm and qualitative spectral analysis
No full textStudi Pengaruh Konsentrasi Katalis ZnO untuk Degradasi Limbah Palm Oil Mill Effluent (POME) Menggunakan Teknologi Fotokatalitik
No full textIndonesia is among the world’s largest palm oil market countries leading to significant growth in the domestic palm oil industry. However, the increase in palm oil trading has also led to a rise in the production of waste known as Palm Oil Mill Effluent (POME). Currently, the majority of factories use open ponds for POME processing, but this method is considered ineffective for treating POME. To address this issue, researchers are exploring photocatalytic technology, which utilizes light energy (UV, visible, sunlight) to produce radical compounds that act as oxidizing agents for POME degradation. In this study, ZnO was employed as a catalyst. The XRD and UV-vis DRS characterizations confirmed that ZnO had a hexagonal wurtzite crystal structure with a band gap energy of 3,22 eV. The photocatalytic activity test results revealed that using 0.5 g/L ZnO catalyst proved to be efficient in degrading organic content in POME. The percentage of chemical oxygen demand (COD) degradation reached 22.85%, color degradation reached 48.53% and the reaction rate kinetics constant of COD degradation was at 2.6´10-3 min-1.Indonesia merupakan salah satu negara center market kelapa sawit terbesar di dunia sehingga perkembangan industri kelapa sawit dalam negeri tumbuh dengan sangat pesat. Namun, meningkatnya aktivitas perdagangan kelapa sawit berdampak terhadap meningkatnya limbah yang dihasilkan yaitu Palm Oil Mill Eflluent (POME). Mayoritas pabrik saat ini masih menggunakan open pond sebagai teknologi pengolahan POME, namun penggunaan teknologi ini dinilai belum efektif untuk pengolahan POME. Fotokatalitik merupakan teknologi berbasis energi sinar (UV, tampak, sinar matahari) untuk menghasilkan senyawa radikal yang dimanfaatkan sebagai agen pengoksidasi limbah POME. Katalis yang digunakan pada penelitian ini adalah ZnO. Berdasarkan hasil karakterisasi XRD dan UV-vis DRS, struktur kristal dari ZnO adalah hexagonal wurtzite dengan energi celah pita sebesar 3,22 eV. Berdasarkan hasil uji aktivitas degradasi fotokatalitik limbah POME, diperoleh bahwa penggunaan katalis ZnO dengan konsentrasi 0,5 g/L dinilai cukup efisien untuk mendegradasi kandungan organik pada limbah POME dengan persentase reduksi chemical oxygen demand (COD) mencapai 22,85%, warna 48,53% dengan konstatnta laju reaksi COD (k) adalah 2,6´10-3 menit-1
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