bluuebunny/crossref_metadata_2025 huggingface dataset:
Psychosocial, cultural, and academic challenges to Saudi Arabian students in Australia
Authors: Jameel Tahir , Baig Mukhtiar , Tariq Saba , Gazzaz Zohair Jamil , Butt Nadeem Shafique , Althagafi Nouf Khaleel , Hazazi Eman Yahya , Alsayed Razan Saleh
Published: January 2022

Objectives

This study investigated the perceptions of Saudi Arabian medical disciplines students undergoing training in various institutes of Australia regarding psychosocial, cultural, and academic challenges.

Methods

This cross-sectional study was from March 15 to June 15, 2019. Data were collected by an online questionnaire. It consisted of questions regarding demographic, psychosocial, cultural, and academic challenges. Two hundred nineteen students studying in Australia responded to our questionnaire.

Results

Of the total 219 students, 13(6.0%) were undergraduate, 167(76%) were postgraduate, and 39(18%) were Ph.D. students. For most students (171[79.2%]), Australia was the country of choice for studying. Most of them were satisfied with their academic performance and adjustment to the Australian way of living. Most of the students (180[82.2%]) showed satisfaction over the availability of fair chances of their religious practices in Australia. Few of them faced difficulties coping with the Australian climate (25[11.4%]), homesickness (59[26.9%]), and food and dietary sources (44[20.1%]). Students were overall satisfied with the student advisory system (156[71.2%]), university assessments (147[67.2%]), and available research facilities (170[77.6%]). Among participants, 77 (35.1%), 119(54.3%), and 23(10.5%) students indicated that they wished to stay in Australia only until completion of their studies, temporarily and permanently, respectively.

Conclusions

Our findings showed that Saudi students in Australia had strong psychosocial well-being, cultural integration, and academic success. Most of them were satisfied and adjusted well to Australian culture.
Life span inequality as a function of the moments of the deaths distribution: Connections and insights
Authors: Fernandez Oscar E. , Beltrán-Sánchez Hiram
Published: January 2022

Recent work has unearthed many empirical regularities in mortality trends, including the inverse correlation between life expectancy and life span inequality, and the compression of mortality into older age ranges. These regularities have furnished important insights into the dynamics of mortality by describing, in demographic terms, how different attributes of the life table deaths distribution interrelate and change over time. However, though empirical evidence suggests that the demographically-meaningful metrics these regularities involve (e.g., life span disparity and life table entropy) are correlated to the moments of the deaths distribution (e.g., variance), the broader theoretical connections between life span inequality and the moments of the deaths distribution have yet to be elucidated. In this article we establish such connections and leverage them to furnish new insights into mortality dynamics. We prove theoretical results linking life span disparity and life table entropy to the central moments of the deaths distribution, and use these results to empirically link statistical measures of variation of the deaths distribution (e.g., variance, index of dispersion) to life span disparity and life table entropy. We validate these results via empirical analyses using data from the Human Mortality Database and extract from them several new insights into mortality shifting and compression in human populations.
Optimizing operation of delivering and fetching wagons at a railway station with mixed-shaped goods operation sites
Authors: Guo Chuijiang , Li Shengdong
Published: January 2022

The problem of delivering and fetching wagons at a railway station with mixed-shaped goods operation sites is considered, with a view to minimizing the running time between goods operation sites and waiting time of the locomotive in the planning period as the optimization objective. A general mathematical model for delivering and fetching wagons at a railway station with mixed-shaped goods operation sites has been formulated. The methods of judging and processing reverse of delivering and fetching wagons, dividing batches, and judging number of wagons for batch operation are provided to determine the feasibility of the solution, and an improved simulated annealing algorithm is introduced as our algorithm to the model. Finally, an experimental station is taken as an example to verify the model and algorithm. The results show that simulated annealing algorithm is relatively superior in computational efficiency and result compared with genetic algorithm and tabu search algorithm, the computing time of the algorithm provided can meet the requirements of planning shunting operations in railway station, and the model proposed is universal for other layout forms of GOSs and different operation forms.
A four-season study quantifying the weekly external training loads during different between match microcycle lengths in professional rugby league
Authors: Parmley James , Jones Ben , Sawczuk Tom , Weaving Dan
Published: January 2022

This study investigated differences in external training load between microcycle lengths and its variation between microcycles, players, and head coaches. Commonly used external training load variables including total-, high-speed- (5–7 m∙s-1), and sprint-distance (> 7 m∙s-1) alongside combined high acceleration and deceleration distance (> 2 m∙s-2). Which were also expressed relative to time were collected using microtechnology within a repeated measures design from 54 male rugby league players from one Super League team over four seasons. 4337 individual observations across ninety-one separate microcycles and six individual microcycle lengths (5 to 10 day) were included. Linear mixed effects models established the differences in training load between microcycle-length and the variation between-microcycles, players and head coaches. The largest magnitude of difference in training load was seen when comparing 5-day with 9-day (ES = 0.31 to 0.53) and 10-day (ES = 0.19 to 0.66) microcycles. The greatest number of differences between microcycles were observed in high- (ES = 0.3 to 0.53) and sprint-speed (ES = 0.2 to 0.42) variables. Between-microcycle variability ranged between 11% to 35% dependent on training load variable. Training load also varied between players (5–65%) and head coaches (6–20%) with most variability existing within high-speed (19–43%) and sprinting (19–65%). Overall, differences in training load between microcycle lengths exist, likely due to manipulation of session duration. Furthermore, training load varies between microcycle, player and head coach.
Phenomic analysis of the honey bee pathogen-web and its dynamics on colony productivity, health and social immunity behaviors
Authors: Borba Renata S. , Hoover Shelley E. , Currie Robert W. , Giovenazzo Pierre , Guarna M. Marta , Foster Leonard J. , Zayed Amro , Pernal Stephen F.
Published: January 2022

Many pathogens and parasites have evolved to overwhelm and suppress their host’s immune system. Nevertheless, the interactive effects of these agents on colony productivity and wintering success have been relatively unexplored, particularly in large-scale phenomic studies. As a defense mechanism, honey bees have evolved remarkable social behaviors to defend against pathogen and parasite challenges, which reduce the impact of disease and improve colony health. To investigate the complex role of pathogens, parasites and social immunity behaviors in relation to colony productivity and outcomes, we extensively studied colonies at several locations across Canada for two years. In 2016 and 2017, colonies founded with 1-year-old queens of diverse genetic origin were evaluated, which represented a generalized subset of the Canadian bee population. During each experimental year (May through April), we collected phenotypic data and sampled colonies for pathogen analysis in a standardized manner. Measures included: colony size and productivity (colony weight, cluster size, honey production, and sealed brood population), social immunity traits (hygienic behavior, instantaneous mite population growth rate, and grooming behavior), as well as quantification of gut parasites (Nosema spp., and Lotmaria passim), viruses (DWV-A, DWV-B, BQCV and SBV) and external parasites (Varroa destructor). Our goal was to examine: 1) correlations between pathogens and colony phenotypes; 2) the dynamics of pathogens and parasites on colony phenotypes and productivity traits; and 3) the effects of social immunity behaviors on colony pathogen load. Our results show that colonies expressing high levels of some social immunity behaviors were associated with low levels of pathogens/parasites, including viruses, Nosema spp., and V. destructor. In addition, we determined that elevated viral and Nosema spp. levels were associated with low levels of colony productivity, and that five out of six pathogenic factors measured were negatively associated with colony size and weight in both fall and spring periods. Finally, this study also provides information about the incidence and abundance of pathogens, colony phenotypes, and further disentangles their inter-correlation, so as to better understand drivers of honey bee colony health and productivity.
An improved X-means and isolation forest based methodology for network traffic anomaly detection
Authors: Feng Yifan , Cai Weihong , Yue Haoyu , Xu Jianlong , Lin Yan , Chen Jiaxin , Hu Zijun
Published: January 2022

Anomaly detection in network traffic is becoming a challenging task due to the complexity of large-scale networks and the proliferation of various social network applications. In the actual industrial environment, only recently obtained unlabelled data can be used as the training set. The accuracy of the abnormal ratio in the training set as prior knowledge has a great influence on the performance of the commonly used unsupervised algorithms. In this study, an anomaly detection algorithm based on X-means and iForest is proposed, named X-iForest, which clusters the standard Euclidean distance between the abnormal points and the normal cluster centre to achieve secondary filtering by using X-means. We compared X-iForest with seven mainstream unsupervised algorithms in terms of the AUC and anomaly detection rates. A large number of experiments showed that X-iForest has notable advantages over other algorithms and can be well applied to anomaly detection of large-scale network traffic data.
The Anecdotal Archive: Building Design, Oral History, and the Notion of an Alevi Place of Worship
Authors: Andersen Angela
Published: January 2022

Scholarly investigation of communities with oral teaching traditions and vernacular building designs must step beyond established research frameworks for Islamic religious architecture to challenge typological and document-based categorizations of monumental buildings. Alevism’s student-teacher based socio-religious structure and service-oriented approaches to community life and religious expression, both in Turkey and in other parts of the world, shape interpretations of ceremonial cemevis, the houses of the cem ceremony. Alevi discussions of this architecture must play a significant role in the scholarly analysis of these sites. In this article, I emphasize the role of oral history in architectural studies by conducting interviews with architects who have participated in design competitions and contributed to a dialogue on a nascent contemporary Alevi monumental idiom. The article also highlights the considerations that arise in the course of examining both traditional and modern Alevi spaces, and reflects on the role of engagement with Alevis when researching cemevis and ceremonial settings.
Islands of Heritage: Conservation and Transformation in Yemen, Nathalie Peutz (2018)
Authors: Orkaby Asher
Published: January 2022

Review of: Islands of Heritage: Conservation and Transformation in Yemen, Nathalie Peutz (2018)

Stanford, CA: Stanford University Press, 369 pp., 8 b&w illus.,

ISBN: 9781503607149 (cloth), $90

ISBN: 9781503607149 (paperback), $30
The influence of photographs, music and comedy in Instagram coronavirus messages on adult preventive habits
Authors: Ayo-Obiremi IfeKristi T.
Published: January 2022

Coronaviruses have been in existence for over five decades – shaking and taking lives around the world. COVID-19 is similar to others in this regard, but different because it has had a more global impact, causing more deaths than previous life-threatening viruses. In order to reduce deaths and curtail the virus, different communication forms are being used in various countries. Hinged on the agenda-setting and the individual differences theories of media, this study analyses the use of photographs, comedy and music in communicating coronavirus messages on Instagram, the influence of these messages on preventive measures and the attitude of Nigerian citizens to prevention tips based on the content of the messages. Using mixed method of qualitative content analysis and survey, 120 Instagram COVID-19 messages from sixteen social media skit creators/influencers were analysed. Responses of 247 survey respondents, mostly from South West Nigeria, were used to examine the influence of these messages on citizens’ preventive habits. Results of the study reveal that different methods including pictures, comedy, music, satire and spoken words were used in communicating coronavirus messages and preventive tips on Instagram. However, music, comedy, photograph and short film messages gained more attention and responses from citizens. Citizens identified them as helpful in cultivating preventive habits because these messages were easier to remember and they gave detailed explanations of prevention habits citizens should adhere to in order to curtail the spread of coronavirus. Media should therefore continue to use different strategies, especially music, comedy, photographs and short films, to reach citizens.
Desigualdad espacial, segmentación educativa y diferenciación institucional: aportes de representaciones cartográficas en una localidad
Authors: Sassera Jorgelina Silvia
Published: January 2022

La comprensión de las dimensiones que intervienen en la producción de desigualdad en la educación, requiere de una perspectiva interdisciplinaria con aportes de la sociología, las ciencias de la educación, la política educativa y la geografía. El artículo explora indicios sobre las articulaciones de diferentes desigualdades en una ciudad de Argentina, las características de las instituciones de educación secundaria y las condiciones de vida locales, mediante representaciones cartográficas. Los mapas educativos locales pueden constituirse en una herramienta que permita evaluar los criterios de emplazamiento de instituciones, conocer a la población a la que accede y las condiciones en lo que lo hace.
Re-Visiting the Sources of “Hans Pfaall”: A Tentative Approach to Include Hugh Henry Brackenridge’s Modern Chivalry
Authors: Correoso Rodenas José Manuel
Published: January 2022

Dealing with the sources authors have historically had for the composition of their pieces is not always an easy task, especially if we considered writers like Edgar Allan Poe, who was an extensive reader. In the particular case of “The Unparalleled Adventure of One Hans Pfaall” even more issues should be brought to the debate, for this short story constitutes an early attempt of Poe towards the creation of (satiric) science-fiction. In consequence, the reference to scientific and pseudo-scientific texts needs to be constant. However, the aim of this article is not the discussion of these (for they have already been studies, as shown below) but the inclusion of a new source, Hugh Henry Brackenridge’s Modern Chivalry, which has been overshadowed to the present day and which offers a new, enhancing vision of Poe’s narration. By doing this, it is also the aim of this article to offer a reevaluation of “Hans Pfaall” through the lens of American-ness, a topic already widely discussed in reference to Poe and which has been proven as being among the most influential the Bostonian acquired during his career.
A mentorálás offline és online minőségei a Tanítsunk Magyarországért
mentorprogramban
Authors: Godó Katalin
Published: January 2022

A mentorálás fontosságát már nemzetközi szinten is számos társadalmi
összefüggésben felismerték (Wingerter, 2010). Az iskolai keretek között
létrejövő mentorprogramok száma mind nemzetközi, mind hazai szinten egyre
inkább növekszik (Raufelder és Ittel, 2012; Fejes és mtsai, 2009). A
hagyományos (tradicionális) mentorálás mellett a kortárs mentorálás (peer
mentoring; Miller, 2002) szerepe is előtérbe került az utóbbi években. Mi
az életkoron átívelő kortárs mentorálásra (cross-age peer mentoring;
Miller, 2002; Karcher, 2005) fókuszálunk, ahol idősebb fiatal mentorál
fiatalabb fiatalt. Ennek egyik hazai példája a Tanítsunk Magyarországért
(TM) mentorprogram, ahol egyetemisták mentorálnak általános iskolás
diákokat. Kutatásunkban a programban részt vevő Debreceni Egyetemre járó
mentorokat vizsgáltuk, akik legalább két féléves ciklust teljesítettek.
Kíváncsiak voltunk arra, hogy a COVID-19 pandémia időszaka hogyan
befolyásolta a mentorálást, tehát egy alapvetően személyes találkozásra
épülő mentorprogram online mentorálásra való áttérését és annak sarkalatos
pontjait, előnyeit, hátrányait vizsgáltuk. Módszerként kvalitatív
interjúelemzést alkalmaztunk, mely során félig strukturált interjúkkal
dolgoztunk, amelyek 2020 és 2021 tavaszán – a globális járványhelyzet
idején – készültek összesen 50 mentorral. Az interjúszövegek
tartalomelemzését az elmélet alapján megfogalmazott kódok, illetve az
interjúkban felkínálkozó émikus kódok alapján végeztük el (Creswell, 2012).
Eredményeink alapján az látszik, hogy az online mentoráláshoz való
hozzáállás alapján a mentorok különböző típusokba rendezhetők.
Összességében nagy kihívást jelentett a digitális átállás. Legnagyobb
probléma az eszközhiány volt. Ugyanakkor fontos tényezőnek bizonyult a
digitális komfortosság-érzet tekintetében az életkor kérdése. Felfigyeltünk
a Big Brother Mentoring (nagy testvér mentorálás) jelenségére. Kutatásunk
hiánypótló lehet, hiszen rámutat az online mentorálás kihívásaira és
előnyeire egyaránt, illetve a Tanítsunk Magyarországért mentorprogram
hatékony és sikeres működését is elősegítheti.
Turizmus és biztonság: a magyar lakosság utazási szokásaihoz köthető, biztonsággal kapcsolatos attitűdök reprezentatív vizsgálata
Authors: Csapó János , Törőcsik Mária
Published: January 2022

Tudjuk, hogy a fogyasztói döntések szempontjai, illetve meghozataluk módjai időről időre változ­nak, ezért a döntéshozóknak és a kutatóknak is újabb és újabb kérdéseket kell megvizsgálniuk, hogy releváns megállapításokat tehessenek. Bár mindig is jelen volt a desztinációválasztásban, a bizton­ság kérdésköre nem túl régen jelent meg fokozottabb jelentőséggel a döntési szempontok között. Azért nyert ma más jelentőséget ez a kérdéskör, mert napjainkban a turizmussal egyre több olyan térség érhető el a szélesebb célközönség számára is, amelyek esetében relevánssá válik a biztonság vizsgálata, akár elsődleges szempontként kezelve azt. A tömegturizmus kedvelői nem vágynak koc­kázatra, sokkal inkább a kiszámíthatóságot preferálják, így számukra alapvető a biztonság. Tudjuk, hogy a vásárlási döntések komplexek, és nem csupán egyetlen tényező határozza meg a kimenetet, mégis célszerű időnként egy összetevőre koncentrálva feltenni az arra vonatkozó kérdéseket. Ta­nulmányunkban azt vizsgáljuk, mennyiben határozzák meg a magyar lakosság döntéseit a bizton­ság különböző területei, milyen szegmensek esetében játszanak kiemelt szerepet, és milyen arányú csoportok számára válnak sokadlagos kérdéssé. Munkánk alapja egy 2018-ban végzett országos, a felnőtt 15-74 éves lakosságra reprezentatív online megkérdezés adatbázisa. Ennek elemzésével jutunk eredményekhez.
Hogyan befolyásolja a vendégek személyisége a magyar wellness-szállodákkal kapcsolatos elégedettséget?
Authors: Kökény László , Kenesei Zsófia
Published: January 2022

Kutatási tanulmányok szerint egyre nagyobb teret kap a vállalatok marketingtevékenységében az a felfogás, hogy a fogyasztók egyediek, saját, személyiségükből következő értékrenddel bírnak. Erre a felfogásra a vállalatok is egyre inkább nyitottak, mivel a céljuk a minél hatékonyabb kiszolgálás és ezáltal a minél nagyobb profit. A személyiségtípusok azonosításával lehetőség nyílik a fogyasztók személyiségalapú csoportosítására. Kutatásunk célja azt megvizsgálni, hogy a fogyasztói szemé­lyiségtípusok hogyan, és milyen mértékben befolyásolják a szállodai szolgáltatással kapcsolatos elégedettséget. Az elégedettség területét a szállodai szolgáltatás tényezőire fókuszáljuk, és a szak­irodalom alapján különböző részterületeket alakítunk ki, mint például a fizikai környezettel és a személyzettel kapcsolatos elégedettség. A személyiségtípus elemzéshez a Big Five Faktor tesztet használjuk. Összességében megállapítható, hogy a személyiségtípusok közül a barátságosság és a tudatosság szignifikánsan befolyásolja, a vártnak megfelelő irányba, a személyzetre és a fizikai környezetre vonatkozó elégedettség faktort. Ezzel ellentétben a neuroticitás, az extraverzió és a nyitottság egyáltalán nem befolyásolja szignifikánsan egyik elégedettség faktort sem.
ESCREVIVÊNCIAS DAS JUVENTUDES NEGRAS E LGBTQI+
Authors: Martins Francisco André , Sousa Cirlene , Souza Liliane
Published: January 2022

Este artigo apresenta debates e reflexões sobre o ser e o fazer docente vivenciados por um grupo de professores e professoras na execução do projeto de extensão universitária denominado “Escritas Juvenis”. As cartas foram utilizadas na formação de professores mineiros e professoras mineiras através de oficinas que tinham como objetivos sensibilizar e formar docentes conscientes dos problemas, conflitos e obstáculos enfrentados na realidade escolar pelas juventudes brasileiras. Duas vinculações teóricas se destacam: o conceito de Escrevivências da escritora e literata brasileira Conceição Evaristo e o conceito de Educação Decolonial do escritor e educador brasileiro Paulo Freire e do filósofo argentino Enrique Dussel, entre outros. Nas considerações finais, destaca-se a urgência de se compreender a pluralidade das experiências e diversidades discentes e docentes presentes na educação básica.  E, fundamentalmente, desenvolver ações extensionistas que sejam capazes de educar a comunidade escolar para a complexidade da tríade escola, formação docente e processos de desumanização e invisiblização de estudantes negros, negras e LGBTQI+.
O DISCURSO DE PROFESSORES DE EDUCAÇÃO FÍSICA SOBRE ATLETAS TRANS NO ESPORTE
Authors: Dos Santos Mariana Carvalho , Marques Garcia Rafael , Iwamoto Thiago Camargo , Pereira Erik Giuseppe Barbosa
Published: January 2022

Objetivamos analisar o discurso de professores/as de Educação Física em formação sobre a legitimidade da/na participação da atleta trans Tifanny Abreu no voleibol feminino, a partir de comentários em um grupo no Facebook. Utilizamos a técnica de análise de discurso para depurar 38 comentários de uma publicação que solicitava a opinião dos membros do grupo virtual sobre o caso de Tifanny no voleibol. Os resultados apontaram para: 1- o desconhecimento conceitual e teórico na/da temática “trans e esporte”, reforçando o discurso biomédico cisgênero e transfóbico; 2- reconhecimento das trajetórias trans esportivas e; 3- dúvidas e curiosidades sobre a temática, destacando que a área ainda aborda muito pouco sobre corpos que escapam à cisnormatividade.
Geospatial Modeling of Blue Carbon Ecosystem Coastal Degradation in Jakarta Bay
Authors: Sudirman Nasir , Helmi Muhammad , Salim Hadiwijaya L.
Published: January 2022

Jakarta Bay is shallow water which is used for various activities, currently experiencing environment, soil,and sediment degradation. Jakarta Bay experienced rapid development, population growth, increased economic activity and utilization of coastal resources. The development of Jakarta Bay is carried out to balance land necessity and overcome the problem of land subsidence through reclamation and construction of sea dikes. Ecosystem services arethe contribution of various interrelated ecological structures and functions, mangrove ecosystems provide services as an important part of the carbon cycle. Mangroves use CO2 for photosynthesis and store it in Biomass and sediment stock. Mangrove ecosystems in Jakarta Bay have been degraded and deforested due to land conversion for settlement, facilities, and other activities, in line with the increasing population. The calculation of the service value of mangrove ecosystems is limited to economic valuation and descriptive account, geospatial modelling has not been widely carried out, this has caused widespread and temporal unknown data on ecosystem services. The Coastal Blue Carbon geospatial modelling used in this study requires land use classification data input based on the interpretation of Landsat satellite's images and global carbon deposits in mangrove ecosystems while carbon prices are based on Social Cost Carbon (SCC), Greenhouse Gas Initiative (RGGI) and International Voluntary Market Price (IVMP). This study produced a map of the dynamics of carbon stock, sequestration, emissions, accumulation and net present value of carbon. The output of these maps is expected to be a referencefor sustainable mangrove management, coastal area planning optimization with mangrove ecosystem protection so it can be part of climate change mitigation efforts in Jakarta Bay.
Studi Perubahan Garis Pantai di Perairan Muara Sungai Kaliboyo, Batang
Authors: Zadia Novi Henis , Hariyadi Hariyadi , Atmodjo Warsito , Yusuf Muh , Rifai Azis
Published: January 2022

Perairan Muara Sungai Kaliboyo kawasan yang dinamis dan cepat mengalami perubahan garis pantai dan terbentuk spit di mulut sungai. Sedimen di daerah tersebut sering menutup muara sungai, sehingga mengganggu alur layar nelayan. Tujuan dari penelitian ini adalah untuk mengetahui indikasi perubahan garis pantai serta hubungan antara perubahan garis pantai dengan arus sejajar pantai di lokasi penelitian. Metode penelitian menggunakan metode deskriptif, untuk pengambilan sampel menggunakan metode purposive sampling, metode SMB untuk peramalan gelombang dan perhitungan menggunakan rumus empiris untuk validasi pasang surut, arus sejajar pantai dan parameter akresi-erosi.  Hasil penelitian menunjukkan Perairan Muara Sungai Kaliboyo mengalami akresi, hal ini dapat diketahui dari nilai parameter akresi-erosi di tiga penampang. Penampang 1 dengan nilai Go sebesar 0,62, penampang 2 dengan nilai Go sebesar 0,39 dan penampang 3 dengan nilai Go sebesar 0,56. Nilai Go di atas 0,111 menunjukkan adanya akresi. Gelombang datang dari arah Timur Laut menuju Barat Daya menimbulkan gelombang pecah dengan tinggi 0,28 meter pada kedalaman 0,90 meter sehingga membentuk sudut gelombang pecah (αb) sebesar 9,51°. Gelombang pecah tersebut menimbulkan arus sejajar pantai dari Timur ke Barat dengan kecepatan 0,42 m/dt yang mengangkut sedimen sejajar pantai, sehingga membentuk spit di muara sungai dari arah Timur memanjang ke Barat.   Kaliboyo River Estuary is a dynamic and rapidly changing area of the coastline and spits are formed at the river mouth. Sediment in this area often closes river mouths, disrupting the flow of fishermen's screens and clogging up river flow which sometimes causes floods around the river mouth. The purpose of this study is to find out indications of shoreline changes and the relationship between shoreline changes with longshore currents at the study site. The research method uses descriptive method, for sampling using purposive sampling method, SMB method for wave forecasting and calculations using empirical formulas. The research method uses descriptive method, for sampling using purposive sampling method, SMB method for wave forecasting and calculations using empirical formulas for tide validation, longshore currents and erosion-accretion parameters. The results showed that Kaliboyo River Estuary had accretion, this can be seen from the value of the erosion-accretion parameter in three cross sections. The first cross section with a Go value of 0,62, second cross section with a Go value of 0,39 and third cross section with a Go value of 0,56. Go values above 0,111 indicate accretion. Waves coming from the Northeast to the Southwest cause a breaking wave with a height of 0,28 meters at 0,90 meters depth to form an angle of breaking wave (αb) of 9.51°. The breaking wave caused a longshore current from East to West with a speed of 0,42 m /sec which transported sediment along the coast, thus forming a spit at the river mouth from the east extending to the west.
Transpor Sedimen di Perairan Muara Sungai Bodri, Kecamatan Patebon, Kabupaten Kendal
Authors: Andayani Dayinta , Suryoputro Agus Anugroho Dwi , Atmodjo Warsito , Satriadi Alfi , Subardjo Petrus
Published: January 2022

Pantai akan terus berubah bentuknya menyesuaikan kondisi keseimbangan dinamiknya, proses tersebut dapat mengakibatkan akresi ataupun abrasi. Bentuk morfologi pantai yang terus berubah juga terjadi di perairan muara sungai Bodri. Hal ini tidak lepas dari pengaruh gelombang, arus sejajar pantai dan pergerakan sedimen. Perubahan tersebut akan berpengaruh terhadap aktivitas penduduk terutama nelayan yang kesulitan keluar masuk muara sungai Bodri. Tujuan penelitian ini adalah untuk mengetahui transpor sedimen yang disebabkan oleh arus sejajar pantai di perairan muara sungai Bodri selama 10 tahun (2009-2019) pada saat musim Timur. Penelitian ini menggunakan data morfologi, pasang surut, angin, gelombang, arus sejajar pantai, sampel sedimen gosong, dan material padatan  tersuspensi. Metode penelitian yang digunakan adalah metode pendekatan studi kasus dan untuk pentuan titik sampling menggunakan metode purposive sampling serta dianalisis secara kuantitatif. Hasil penelitian dibagi menjadi 3 daerah yaitu daerah Timur muara, depan muara dan Barat muara. Besar arus sejajar pantai di daerah Timur muara yaitu 1,020 m/s, pada daerah depan muara terjadi arus sejajar pantai sebesar 1,243 m/s dan pada daerah Barat muara terjadi arus sejajar pantai sebesar 0,856 m/s. Transpor sedimen terjadi pada bagian Timur muara dengan arah dari Tenggara ke arah Utara sebesar 979.954,903 m3/tahun, kemudian di depan muara sungai arah berbelok ke Barat sebesar 1.131.864,393 m3/tahun, selanjutnya di Barat muara sungai berbelok dari arah Utara ke arah Barat Daya sebesar 432.014,433 m3/tahun. Hasil data konsentrasi sedimen tersuspensi menunjukkan bahwa daerah Timur memiliki nilai konsentrasi paling besar kemudian daerah Barat memiliki nilai konsentrasi terendah. Penelitian ini diharapkan dapat bermanfaat dalam perencanaan pencegahan abrasi dan akresi di perairan muara sungai Bodri.
Model Sebaran Limbah Bahang Di PLTU Tanjung Jati B Jepara
Authors: Hutomo Fernandito Suryo , Ismanto Aris , Setiyono Heryoso , Maslukah Lilik , Widiaratih Rikha
Published: January 2022

PLTU Tanjung Jati B sedang menambah unit operasionalnya. Adanya penambahan unit ini akan menambah luasan limbah air panas yang lebih luas dari sebelumnya. Bertambahnya luasan limbah air panas ini memerlukan analisa pola sebarannya untuk dapat mengantisipasi terjadinya kerusakan lingkungan pada perairan sekitarnya. Tujuan dari penelitian ini adalah untuk mengidentifikasi sebaran suhu perairan setelah adanya penambahan unit 5 & 6 PLTU Tanjung Jati B Kabupaten Jepara pada musim barat, peralihan I, timur, dan peralihan II. Penelitian ini menggunakan data primer berupa suhu lapangan dan debit simulasi air bahang . Data  sekunder berupa pasang surut, batimetri, arus, dan angin. Metode yang digunakan dalam  penelitian ini adalah model hidrodinamika adveksi-dispersi dengan menggunakan aplikasi Delft3D. Hasil penelitian ini adalah pola sebaran suhu air bahang akan mengikuti pola arus yang ada, dimana arah sebaran pada Musim Barat dan Peralihan I condong ke arah timur, lalu pada Musim Timur dan Peralihan II condong ke arah barat.
Pengaruh Fenomena IOD (Indian Ocean Dipole) Terhadap Sebaran Temperatur dan Salinitas di Perairan Barat Sumatera
Authors: Ramadhanty Fannia Wahyu , Muslim Muslim , Kunarso Kunarso , Rochaddi Baskoro , Ismunarti Dwi Haryo
Published: January 2022

Perairan Barat Sumatera dan sekitarnya mendapatkan pengaruh signifikan dari massa air Samudera Hindia, massa air tersebut memberikan perubahan terhadap kondisi oseanografi seperti temperatur dan salinitas. Fenomena IOD (Indian Ocean Dipole) merupakan fenomena antara lautan-atmosfer yang terjadi di daerah ekuator Samudera Hindia, yang memberikan dampak kekeringan ataupun peningkatan intensitas curah hujan. Penelitian ini bertujuan untuk menganalisis pengaruh fenomena IOD terhadap perubahan nilai temperatur dan salinitas, secara vetikal maupun horizontal yang dapat digunakan untuk mengidentifikasikan karakteristik massa air dengan melakukan perhitungan diagram T-S. Penelitian ini menggunakan metode kuantitatif dan deskriptif. Data temperatur, salinitas, dan kedalaman didapat dari instrumen Argo Float tahun 2014 – 2020. Kemudian untuk mendapatkan sebaran vertikal, horizontal, dan Diagram T-S menggunakan software Ocean Data View (ODV). Beradasarkan hasil olahan tersebut didapatkan sebaran temperatur secara vertikal menunjukkan temperatur di lapisan Mixed Layer (0-25 m) yaitu 27,86-31,4 ̊C, lapisan termoklin (26-180 m) yaitu 14,78-26,05 ̊C, dan lapisan dalam (181-2000 m) 2,63-13,03 ̊C. Sebaran salinitas secara verikal di lapisan Mixed Layer (0-24 m) yaitu 32,5-33,62 psu, lapisan haloklin (25-123 m) 33,7-34,63 psu, lapisan dalam (125-2000 m) 34,8-35,2 psu. Sebaran temperatur dan salinitas secara horizontal dipengaruhi oleh musim, dimana temperatur permukaan tertinggi (31,39 ̊C) terjadi pada musim Peralihan I, sedangkan salinitas permukaan tertinggi (35,6 psu) terjadi pada Peralihan II. Berdasarkan Diagram T-S massa air yang teridentifikasi pada Perairan Barat Sumatera yaitu massa air BBW (Bengal Bay Water), SLW (Subtropical Lower Water), SICW (South Indian Central Water), IEW (Indian Equatorial Water), NSM (Northern Salinity Minimum), dan ASW (Arabian Sea Water). Pada saat IOD positif tertinggi (2019) mengakibatkan penurunan temperatur dan kenaikan rerata salinitas, ketika IOD negatif (2016) mengakibatkan kenaikan temperatur dan penurunan rerata salinitas.
Analisis Dinamika Permukaan Laut di Laut Jawa dengan Recurrent Neural Network Periode 1993 sampai 2019
Authors: Mujadida Zamna , Setiyono Heryoso , Handoyo Gentur , Hariyadi Hariyadi , Marwoto Jarot
Published: January 2022

Kenaikan muka air laut yang terjadi setiap tahun dapat disebabkan oleh perubahan iklim yang tidak stabil. Perubahan iklim tersebut disebabkan oleh meningkatnya suhu bumi yang merupakan dampak dari peningkatan gas rumah kaca. Kenaikan muka air laut dapat menyebabkan terganggunya aktivitas manusia terutama di daerah pesisir. Penelitian ini bertujuan menganalisis dinamika perubahan permukaan laut di Laut Jawa dan memprediksi data masa depan menggunakan pendekatan machine learning dengan arsitektur jaringan Recurrent Neural Network (RNN). Data utama yang digunakan adalah data sea level anomaly di Laut Jawa dari tahun 1993 sampai 2019 yang diterbitkan Copernicus Marine Environment Monitoring Service (CMEMS) didukung peta RBI Indonesia dan peta arus permukaan di Laut Jawa. Hasil analisis menunjukkan terjadinya peningkatan nilai muka air laut sejak tahun 1993 sekitar 37,545 mm/tahun. Tren kenaikan tercepat muka air laut di Laut Jawa mencapai nilai 72,313 mm pada tahun 2015-2016 sedangkan tren paling lambat terjadi pada tahun 2002-2005 sekitar 16,7 mm. Perubahan tren muka air laut yang ekstrim terjadi pada tahun 1996-1998 dan pada tahun 2010-2016 dikarenakan terjadinya fenomena El Nino dan La Nina. Evaluasi model dari RNN didapatkan nilai MSE sebesar 0,0000343, nilai RMSE 0,0058564, nilai R2 0,993, dan nilai MAE 0,0045024. Hasil evaluasi tersebut menunjukkan nilai error yang sangat kecil sehingga dapat disimpulkan bahwa model RNN sangat akurat untuk memprediksi dinamika permukaan laut.
Simulasi Pola Sebaran Logam Berat Tembaga (Cu) di Perairan Kota Pekalongan
Authors: Tampubolon Osen Faber Romario , Ismanto Aris , Suryoputro Agus Anugroho Dwi , Muslim Muslim , Indrayanti Elis
Published: January 2022

Logam tembaga (Cu) banyak digunakan dalam proses produksi suatu industri baik sebagai bahan baku, katalisator ataupun bahan utama. Logam Cu termasuk ke dalam kelompok logam essensial, karena padakonsentrasi yang rendah dibutuhkan oleh organisme. Namun demikian, pada konsentrasi tinggi logam Cu ini akan mempunyai sifat toksik. Keberadaan logam dari industri akan mencemari lingkungan perairan, termasuk perairan laut. Kota Pekalongan merupakan salah satu sentra industri tekstil (Batik). Selama proses pembuatan batik ini dapat menghasilkan limbah, logam Cu. Logam Cu dari daerah indutri akan terbawa oleh aliran air sungai atau run off daratan dan menuju ke perairan laut. Selama berada di perairan laut, logam ini akan mengalami distribusi dan pengenceran oleh arus laut. Tujuan penelitian ini adalah untuk memprediksi sebaran Cu di Perairan Kota Pekalongan serta simulasi distribusinya dengan pendekatan model matematika dua dimensi. Tahap pemodelan distribusi Cu menggunakan pemodelan hidrodinamika  untuk memprediksi arah dan kecepatan arus laut serta dilanjutkan modul transport untuk memodelkan distribusi Cu. Hasil penelitian menunjukan konsentrasi Cu di perairan Kota Pekalongan berkisar antara 0,011 – 0,007 mg/l. Simulasi persebaran Cu di Perairan Kota Pekalongan pada musim timur menunjukan bahwa pola persebaran menuju ke arah Barat.
Perbedaan Kedalaman dan Ketebalan Lapisan Termoklin pada Variabilitas ENSO, IOD dan Monsun di Perairan Selatan Jawa
Authors: Ramadhan Firman , Kunarso Kunarso , Wirasatriya Anindya , Maslukah Lilik , Handoyo Gentur
Published: January 2022

Perairan Selatan Jawa dipengaruhi oleh beberapa fenomena, yaitu sistem monsun, El Niño Southern Oscillation (ENSO) dan Indian Ocean Dipole (IOD), fenomena tersebut mempengaruhi nilai temperatur. Termoklin adalah lapisan yang memiliki gradien temperatur vertikal yang signifikan di kedalaman tertentu, sehingga erat kaitannya dengan nilai temperatur. Penelitian ini dilakukan untuk mengetahui perbedaan kedalaman dan ketebalan lapisan termoklin di wilayah pesisir dan laut lepas pada variabilitas ENSO, IOD dan monsun di perairan Selatan Jawa. Penelitian ini menggunakan data temperatur vertikal harian dari argo float (2016 – 2019) untuk mengetahui distribusi temperatur vertikal. Hasil penelitian menunjukkan bahwa batas atas dan batas bawah termoklin terdalam di pesisir terjadi saat IOD(-), yaitu tahun 2016 sebesar 60,17 m, 154,58 m dan tahun 2017 sebesar 62,08 m, 154,17 m, sedangkan saat IOD(+) batas atas dan batas bawah termoklin lebih dangkal, yaitu tahun 2018 sebesar 42,92 m, 136,71 m dan tahun 2019 sebesar 39,25 m, 129,63 m. Hasil untuk laut lepas menunjukkan batas atas dan batas bawah termoklin terdangkal di laut lepas terjadi saat IOD(-), yaitu tahun 2016 sebesar 58,92m, 156,25m dan tahun 2017 sebesar 60m, 152,92m, sedangkan saat IOD (+) batas atas dan batas bawah bertambah dalam, yaitu tahun 2018 sebesar 67,08m, 175,42m dan tahun 2019 sebesar 59m, 172,92m. Hal ini karena IOD(-) di tahun 2016 memiliki nilai indeks DMI sebesar -1 dan di tahun 2019 terjadi IOD(+) dengan nilai indek DMI sebesar 2. Kejadian IOD(-) membuat slope muka air laut di Samudera Hindia bagian Timur khususnya yang lebih dekat dengan pantai menjadi lebih tinggi, sehingga tingginya slope muka air laut membuat batas atas dan batas bawah lapisan termoklin menjadi lebih dalam di pesisir Selatan Jawa Kondisi yang berbeda terjadi di laut lepas dimana slope muka air laut yang lebih rendah daripada di Pesisir menjadikan termoklin lebih dangkal dan ketebalannya lebih tipis., begitu juga sebaliknya pada saat fenomena IOD (+).
Sebaran Spasial dan Temporal Klorofil-a di Perairan Teluk Semarang
Authors: Muhammad Arya , Marwoto Jarot , Kunarso Kunarso , Maslukah Lilik , Wulandari Sri Yulina
Published: January 2022

Teluk Semarang merupakan teluk terbesar di pantai utara Jawa Tengah dan tercatat terdapat 29 aliran sungai bermuara ke teluk ini. Banyak aktivitas manusia seperti industri, pemukiman dan pelabuhan yang bermuara di teluk ini. Aktvitas yang berlangsung di Teluk Semarang berpotensi mencemari perairan dan mengakibatkan perubahan terhadap faktor fisika dan kimia perairan. Hal tersebut berdampak langsung pada kelimpahan dan distribusi klorofil-a. Tujuan penelitian ini adalah mengkaji sebaran konsentrasi klorofil-a secara Spasial dan Temporal di perairan Teluk Semarang dan mengkaji keterkaitan-nya dengan parameter lainya. Citra yang digunakan untuk analisa Klorofil-a  adalah citra Aqua MODIS beresolusi 4 km dan data pelengkap yaitu yaitu kecepatan dan arah angin, SPL, salinitas, curah hujan dan TSS. Penelitian ini memanfaatkan Sistem Informasi Grafis. Hasil pengolahan citra menujukan bahwa Nilai rerata bulanan Klorofil-a di perairan Teluk Semarang berkisar antara 1,85-4,27 mg/m3, Daerah dengan Klorofil-a tinggi umum nya berada pada sisi selatan Teluk Semarang. Klorofil-a memiliki korelasi bivariate yang kuat dan berbanding lurus dengan TSS (0,743), secara kuat berbanding lurus terhadap kecepatan angin (0,456), curah hujan (0,506) dan secara kuat berbanding terbalik dengan suhu (-0,665).
Analisa Spasial dan Temporal Suhu Permukaan Laut dan Klorofil-a selama 2 Dekade di Perairan Indonesia
Authors: Santoso Tri Wulandari , Kunarso Kunarso , Marwoto Jarot
Published: January 2022

Pemahaman pola variabilitas secara spasial dan temporal atas perubahan yang terjadi di lautan sangat penting dilakukan untuk pengelolaan laut. Lautan Indonesia merupakan satu-satunya jalur yang menghubungkan cekungan samudera yang berbeda di daerah tropis, sehingga memainkan peranan penting dalam samudera dan sistem iklim. Suhu permukaan laut (SST) dan Klorofil-a (Chl-a) seringkali digunakan untuk memantau kondisi Lautan terlebih dibawah pengaruh perubahan iklim. Perubahan kedua parameter yang signifikan sangat mempengaruhi produktivitas sumber daya lautan. Tujuan penelitian ini yaitu mengkaji variabilitas spasio temporal SST dan Chl-a di Laut Indonesia selama 2 dekade (2000-2020) dengan menggunakan data citra MODIS TERRA harian. Penelitian dilakukan dengan menganalisis sebaran spasial dan temporal SST dan Chl-a Laut Indonesia dan analisis temporal tiga daerah bagian, yaitu Laut Cina Selatan, Utara Papua, dan Selatan Jawa. Analisa ini didasarkan pada nilai anomali yang didapat dari pengurangan nilai parameter dengan nilai historis (rerata nilai seluruh data). Penelitian ini menunjukkan bahwa terjadi kenaikan slope SST 0,024⁰C/tahun dan Chl-a 0,0012 mg-3/tahun di Indonesia. Slope positif juga ditemui pada ketiga daerah studi. Perairan Selatan Jawa memiliki slope yang paling tinggi dari Laut China Selatan dan Utara Papua. Variabilitas SST dan Chl-a Indonesia mengalami perubahan yang sangat variatif sejak 10 tahun terakhir.
IDENTIFIKASI POTENSI SENYAWA ISOFLAVON DAN QUERCETIN DAN PERBANDINGAN IKATAN TERHADAP ACE (ANGIOTENSIN-CONVERTING ENZYME) MENGGUNAKAN STUDI IN SILICO
Authors: Nissa Choirun , Sukma Guritan Indra , Madjid Indah Juliana , Sidin Nur Mariyah , Musyarrofah Maulidatul
Published: January 2022

Prevalensi hipertensi di Indonesia tergolong tinggi, sekitar 29,1% pada laki-laki dan perempuan sebesar 26,6%. Penderita hipertensi di Jawa Timur juga tergolong tinggi, sebanyak 31.789 orang. Solusi alternatif dalam penelitian ini, memanfaatkan isoflavon dan quercetin sebagai antihipertensi. Isolavon dan quercetin merupakan seyawa fenolik yang mampu berikatan dengan Angiotensin Converting Enzyme(ACE) dan mempengaruhi tekanan darah. Penelitian ini mengidentifikasi potensi senyawa isoflavon dan quercetin serta perbandingan ikatan antara isoflavon dan quercetin terhadap ACE dengan menggunakan perangkat lunak Hex 8. Penelitian ini adalah deskriptif kuantitatif dengan penelusuran melalui metode in silico (pengunduhan molekul dan penambatan molekul) secara komputerisasi.  Softwareatau aplikasi yang digunakan pada penelitian ini adalah pass server dan HEX 8.0. Hasil visualisasi penambatan molekul ditampilkan dengan perangkat lunak Discovery Studio. Hasil penelitian ini menunjukkan bahwa senyawa quercetin dan isoflavone berpotensi sebagai vasoprotektor. Energi penambatan molekul Isoflavon terhadap ACE sebesar -194,66 kkal.mol. Quercetin sebesar -236,47 kkal.mol, Captopril sebesar -494.56 kkal/mol. Energi penambatan ligan isoflavon dan quercetin terhadap ACE (Angiotensin Converting Enzyme) lebih besar daripada penambatan ligan Captopril terhadap ACE (Angiotensin Converting Enzyme). Hasil penelitian ini memberi harapan potensi penggunaan senyawa ligan sebagai antihipertensi namun memerlukan penelitian lebih lanjut.
Feasibility Study of Mernek Milik Kita Program (MERLITA) using Social Return on Investment (SROI) Method
Authors: Suryani Retno , Ikhlas Nurani
Published: January 2022

The MERLITA (Mernek Milik Kita) program is a community development program for PT Pertamina (Persero) Fuel Terminal Maos Cilacap, which was carried out in Mernek Village, Maos District, Cilacap Regency. This program aims to increase the income of farmers and farm laborers by changing the function of planting rice for consumption into superior seeds. In addition, it also encourages environmentally friendly and sustainable agricultural practices because these seeds can reduce the use of urea which can reduce greenhouse gas emissions. The MERLITA program has a significant impact on economic and environmental development in Mernek Village, the community around Mernek village feels the impact. Therefore, in this paper, the results of the Impact Assessment of the program using the SROI method will be given. The measurement results obtained the value of the SROI ratio of 1.34, indicating that every 1 rupiah invested has an impact value of Rp. 1.34. This situation proves that the MERLITA Program is still feasible to be conducted and still positively impacting Mernek Village economy.
Electrocoagulation Method Using Al/Graphite Electrode for Removal Surfactant LAS (Linear Alkylbenzene Sulfonate)
Authors: Khairunisa Nafisa , Suhartana Suhartana , Bima Damar Nurwahyu
Published: January 2022

An increasing number of laundries have caused water contamination by surfactants. One commonly used surfactant is LAS (Linear Alkylbenzene Sulfonate), a material difficult to decompose, polluting the environment. Electrocoagulation was carried out using Al/Graphite electrode, applied to LAS surfactant artistic waste. This study aims to determine the functional ability of the Al/Graphite electrode in reducing surfactant through electrocoagulation. Various variations were carried out, on the voltage parameters (3,6,9,12) Volt; NaCl concentration (0;0.4;0.8;1.2;1.6;2) g/L; pH (3,5,7,9,11) and time (10,20,30,40,50) minutes. To analyze the changes in the sample before and after electrocoagulation, characterization was carried out using a UV-VIS spectrophotometer and FTIR. A kinetic study was conducted to determine the reaction order of electrocoagulation surfactant. Based on a study, removal at condition voltage 9 Volt, initial pH of the solution 9, electrocoagulation time 50 minute, and the addition of NaCl electrolyte 2 g/L, obtained surfactant concentration was 0,785 mg/L with removal efficiency 97,45%. UV-VIS spectra show a decreased absorption at a wavelength of 653 nm. FTIR spectra showed the presence of absorption on the same functional groups, which indicated that most of the surfactant pollutants could be separated from the wastewater through the electrocoagulation process. The second-order reaction was obtained in the surfactant electrocoagulation process.