bluuebunny/crossref_metadata_2025 huggingface dataset:
Cluster Analysis of the Transport and Logistics Potential of the Regions of Kazakhstan
Authors: Satybaldin A. A. , Sadykov B. E. , Moldabekova A. T. , Akhmetova Z. B.
Published: January 2023

The purpose of this study is to assess the regional transport and logistics potential considering economic indicators for transport and logistics. Based on the literature review, elements of the transport and logistics infrastructure were identified, and the mutual influence of the development of transport and logistics and the country’s economy was substantiated. The study of methodological approaches made it possible to identify indicators for assessing the country’s regional transport and logistics potential. We identified 11 indicators in the following groups: indicators of transport infrastructure, logistics indicators and economic indicators for transport and warehousing. The database was generated in the context of regions and cities of republican significance for 2021 according to statistical data from the Bureau of National Statistics of the Agency for Strategic Planning and Reforms of the Republic of Kazakhstan. Using the cluster analysis method, regions were ranked, and groups of regions with different levels of transport and logistics potential were identified. Recommendations were made to improve the quality of logistics services along international transport corridors in the regions of Kazakhstan. The necessity of technological modernization of the transport and logistics infrastructure of the region is substantiated, which allows the creation of modern conditions for the effective functioning of all components of the transport and logistics infrastructure of the region.
ADDITION OF PET POWDER TO REPLACE FINE AGGREGATE IN INTERLOCKING FLOORS
Authors: Barreto Kleyton
Published: January 2023

The growing quest to reduce the impacts generated on the environment, the application of materials of alternative origin in civil construction increases and the need for companies to reduce costs through the recycling of materials that would be disposed of in the trash. One of these materials is PET (polyethylene terephthalate), a material with certain resistance and flexibility. This study envisages analyzing the tensile strength of concrete when incorporated with fiber or PET bottle powder as an addition, verifying the feasibility of this union.
FELINE PANCREATITIS
Authors: Carvalho Meireles Azevedo Emille , Oliveira Porto Larissa , Lopes Braga Silva Dhoglas , Novaes Chaves Renato
Published: January 2023

Introduction: The pancreas is in the cranial abdomen with its left lobe positioned between the greater curvature of the stomach and the transverse colon. Its diseases occur frequently, being underdiagnosed due to the nonspecificity of clinical signs and the difficulty of access to the organ through diagnostic imaging, biopsy, and the lack of specific clinicopathological tests. Objective: To verify the main predisposing factors and identify the cause of this disease in felines, through an integrative review. Methodology: This is an integrative review, based on 5 scientific articles, published between the years 2017 to 2022, in the MEDLINE, LILACS, SciELO, VETINDEX, DeepDyve and Google Scholar databases. Data analysis through the collection of information and description of the main data found. Results: Diseases of the exocrine pancreas occur frequently, so pancreatitis refers to inflammation caused by the self- digestion of this organ by secreted pancreatic enzymes that are activated within acinar cells due to a failure of the host’s defense mechanism, which leads to a systemic and local lesion, occurring in conjunction with the activity of pancreatic enzymes and inflammatory mediators such as kinins and free radicals. Final considerations: The diagnosis of the disease is difficult to occur due to the nonspecificity of clinical signs and exams, the treatment of pancreatitis aims to reduce pancreatic activity without causing further damage to the pancreas and adjacent organs and to treat the disease itself since the cause of this is rarely identified.
Development of Integral Calculus Teaching Materials to Improve Mathematical Reasoning Ability of Mathematics Education Students at HKBP Nommensen Pematangsiantar University
Authors: Siahaan Theresia Monika , Pane Eva Pratiwi , Sidabutar Ropinus , Sauduran Golda Novatrasio
Published: January 2023

Integral is one of the main subjects in the school mathematics curriculum and is the compulsory subject in the Mathematics Education Study Program at HKBP Nommensen Pematangsiantar University, namely the Integral calculus course. Therefore the status of this material is the subject matter for SMA/MK students and students in mathematics education study programs. This study aims to discover how to develop integral calculus to improve the mathematical reasoning abilities of mathematics education students at HKBP Nommensen Pematangsiantar University. Research on the development of integral calculus teaching materials uses the analysis, design, development, implementation, and evaluation stages. Initial and limited field trials were conducted at the Teaching and Education Faculty (FKIP) HKBP University Nommensen Pematangsiantar. The normality analysis of gain (n-gain) in the experimental student class has increased with an average n-gain value of 0.87. Feasibility of Integral Calculus Teaching Materials Integral Calculus obtained percentage values from experts and subjects studied as follows: (1) Post-test scores reached an average of 83 compared to pretest average scores of 48, there was a significant increase. This shows an increase in learning outcomes after using the results of the product development of Integral Calculus teaching materials. Acquisition of the development value of Integral Calculus Teaching Materials has a high level of attractiveness based on the assessment of material/content experts reaching 93.75%; (2) The acquisition of the value of developing Integral Calculus has a high level of attractiveness based on the assessment of design experts getting 86.53%. Also, the importance of developing Integral Calculus has a high level of beauty based on field test assessments reaching 91%.
Measurement Through Sustainability Indicators in Production Processes: a Systematic Review
Authors: Kuasoski Marli , Novak Maricleia Aparecida Leite , Doliveira Sérgio Luís Dias , Magni Cristiana
Published: January 2023

Purpose: Sustainability in the organizational context reveals itself as a significant and emerging factor to curb socio-environmental impacts. The study aims are to present a systematic literature review about the models of indicators to assess sustainability in production processes, in the period from 2015 to 2019.Design/methodology/approach: The bibliographic search comprised multiple academic databases. In total, 97 papers composed the research corpus.Research, Practical & Social implications: The results reveal that studies on sustainability indicators have been growing, especially in 2019, predominantly in the civil construction and manufacturing sectors. The models with identified names were highlighted and their characteristics presented..Originality/value: In general, the study provides insights into models of sustainability indicators that can be used to measure sustainability in the productive environment.
Soil Resistivity, its Impact on Optimum Depth of Electrodes in Earthing System– Case Study University of Port Harcourt Residential Staff Quarters
Authors: E. Edeko Engr. Theophilus , Omorogiuwa Dr. Eseosa
Published: January 2023

A well-designed earthing system plays a vital role in any Electrical Facility. Soil resistivity measurement is an important parameter when designing earthing system. However, it is a known fact that the resistance of an earth electrode which is a component of earthing system is heavily influenced by the resistivity of the soil in which it is driven to. A knowledge of the soil resistivity at the intended site, and how this varies with parameters such as moisture content, temperature and depth, provides a valuable insight into how the desired earth resistance value can be achieved and maintained over the life of the installation with the minimum cost and effort. One of the main objectives of earthing electrical systems is to establish a common reference potential for the power supply system, building structure, plant steelwork, electrical conduits, cable ladders and trays and the instrumentation system. To achieve this objective, a suitable low resistance connection to earth is desirable. In this research paper, soil resistivity was investigated in three different residential staff quarters of University of Port Harcourt Choba, Abuja and Delta Campuses during the wet and dry season of 2022 using the relevant IEEE standards and International best practices for determining Electrical substation and residential buildings earthing system designs. To determine the optimum depth of grounding electrodes that will have the acceptable values of earth resistance and resistivity for earthing system designs, the Wenner four pin method of measuring soil resistivity was employed. The findings of this research paper show the optimum depth the grounding electrodes will get to in order to obtain the best earth resistance and resistivity values that is suitable for substation and residential earthing system designs. The outcome of this study is also useful for purposes of estimating the number of grounding electrodes, ground resistance and potential gradients including step and touch voltages of substation grounding installations around the three locations of study in university of Port Harcourt residential staff quarters.
Application of Therapeutic Architectural Principles in the Design of Drug Rehabilitation Centre for Nigeria
Authors: Aliyu Abubakar , Babayo Adamu Mohammed , Hamza Musa
Published: January 2023

In order to achieve lifetime abstinence from illicit drugs and psychoactive substances, drug de-addiction and rehabilitation now endeavors to provide emotional support along with medical care, rather than aiming at removal of physical dependences on drugs only. When a drug addict is released from a Detention Camp, he/she is reintegrated back to the society as liability with high temptation to relapse, due to the ineffectiveness of the detention strategy and gross inadequacy of drug treatment and rehabilitation services in Nigeria, as Programs like Detoxification, Psychotherapy and Meditation are absent. The purpose of this study therefore is to explore the principles of therapeutic architecture towards designing a therapeutic environment, with a view to support the new treatment trend for drug addicts and thugs in Bauchi state- Nigeria. The method applied in this study is basically qualitative, using Multiple Case Study approach. Cross Case Analysis was used to analyze the data collected. This study identified 12 principles of Therapeutic Architecture and was able to determine the best mode of application for the design of the Rehabilitation Centre. The findings of this study showcase Architecture in aiding therapy for drug addicts and thugs, by creating a therapeutic environment that addresses the problem of relapse and inadequacy of the treatment facility in the study area, which ensures reintegration of addicts back to the society within the shortest possible time with minimal professional intervention.
Nutritional status among pregnant adolescents at maternity teaching hospital
Authors: Jawzali Jwan Ibrahim , Abdullah Sahar Ismail , Abdullah Nahidah Hassan
Published: January 2023

Background: Adolescent pregnancy increases nutritional requirements and the risk of pregnancy complications. There are few studies about anthropometric measurements as predictors of the nutritional status of pregnancy. Objective: The study consisted of an assessment of nutritional status by studying the association of anthropometric index and biochemical tests with adolescent pregnancy outcomes. Materials and Methods: A descriptive study included 116 convenient samples of pregnant adolescents. An interview questionnaire was used for collecting the following data: socio-demographic, body mass index (BMI), height, mid-upper arm circumference (MUAC), hemoglobin levels, and proteinuria. Pregnancy complications included; anemia, urinary tract infection, mode of delivery, preterm birth, and low birth weight. Descriptive statistics, Pearson's R test chi-square, and logistic regression were all used in statistical analysis. Results: The majority of study subjects were of late age of adolescence (≥ 17 years), housewives with primary education, and had normal obstetric history. Multigravida was only in late age of adolescence. Most 46.9% were overweight. Primigravida decrease in overweight subjects (odds ratio [OR] 0.2*; 95% confidence interval [CI] 0.03-0.88). The highest percentage had normal stature, 12.1% had short stature, 46.6 % had MUAC ˃28cm, and 3.4 % had undernutrition. Short stature increased at age 17 years and the risk of multipara increased in short stature (OR 4.2*; 95% CI 1.2-14.4). The majority had normal pregnancy outcomes. Anemia risk decreased in the normal height group (OR=0.08*: 95% CI 0.01-0.73), and in MUAC ≥ 28 cm (OR 0.77*; 95% CI 0.64-0,93). The risk of low birth weight increased not significantly in late age, among MUAC 24-28 cm, and significantly in anemia (OR=2.5*, 95% 1.1-5.5). Conclusion: This study concluded that the majority of the adolescents with primigravid/para status had normal nutritional status and pregnancy outcomes, as a result of growth in height, MUAC, and weight gain. malnutrition among overweight older adolescents with multigravida status affects growth, causes shorter stature, and anemia consequently increases the risk of low birth weight, preterm birth, and cesarian section. Because its effects manifest as teenage age increases in multigravida, this study supports the prevention of adolescent pregnancy. MUAC can be used to assess adolescent pregnancy complications.
Sistem Informasi Pendaftaran Praktek Kerja Nyata (PKN) dan Skripsi Fakultas Teknik Universitas Pancamarga
Authors: Ahmad Atijani , Hikmah Nuzul , Misdiyanto Misdiyanto
Published: January 2023

A website is a collection of pages containing certain information and can be accessed easily by anyone, anytime, and anywhere through the internet. In an educational institution, of course, it is very necessary for information systems in regulating academic activities that are fast, effective, efficient, accurate to improve the quality standards of education in these educational institutions.

Faculty of Engineering, Panca Marga University is one of the private universities in Probolinggo Regency with 3 (three) study programs, namely electrical engineering, mechanical engineering and industrial engineering. Final projects such as Real Work Practice (PKN) and thesis are the final tasks that must be completed by a student who will graduate from the level of undergraduate education or diploma in college.

Currently, the final project administration process at the Faculty of Engineering, Panca Marga University is still computerized simply where the final task implementation data is still stored in folders made by academic staff themselves, there is no final project reporting system. This is felt inappropriate so it takes a long time to process the final project data with a large number of students. Based on this, researchers created a pkn final project information system and web-based thesis. In this study, the authors used the Waterfall Method as an application development method. The Waterfall method is a sequential development model. In the process of creating the waterfall method, it starts with analysis, design, coding, testing and maintenance
UNSUR BUDAYA CERITA RAKYAT SUKU MAIRASI
Authors: Sriyono Sriyono , Siswanto Siswanto
Published: January 2023

Abstract : The study aims to reveal elements of the culture reflected in the mairasi, kaimana, west Papua folk story with the approach to literary anthropology. Data obtained through observation, interview, record, and note. Research data consists of textual units containing cultural elements. Analysis is done by interpreting these cultural elements based on ethnographic reference. The results of this study suggest that through the literary anthropology approach, the cultural elements of the Mairasi folklore become much clearer. Analysis found that the Mairasi language is alive and is used as a means of communication. The Mairasi people had a traditional house called weso and became a garden home. This house also as a kinship marker. The mairasi people know the nuclear family and the marriage is performed with the klen outside their klen. To maintain stability and cultural norms they have a chosen leader based on his knowledge of klen background. The Mairasi people became familiar with the new profession of fishing, originally they were hunters and farmers. Some devices used for daily activities are more commonly made from natural materials. It is the reasons that they believe in natural forces which are internalized in their systems of knowledge and religious systems.
ANALISIS PENGARUH AIR GARAM TERHADAP LAJU KERUSAKAN BAJA ST 37
Authors: DARWIS MUH. , AZIS ASLIM MUDA
Published: January 2023

Steel is the primadonna which is widely used in supporting equipment for human activities. Carbon steel is a metal that is easily corroded. The purpose of this study was to determine the effect of immersion time on the corrosion rate of st 37 alloy steel. The research method used is to analyze mass reduction. This method is the simplest corrosion rate measurement method, namely the sample mass before and after testing is weighed to determine the difference in mass. Data was collected by calculating the mass of St 37 steel which had been cleaned of oxides and this mass was stated as the initial mass, then soaked in salt water for 10 days, 30 days and 50 days. After that, the mass calculation is carried out again on the steel that has been soaked and the mass is stated as the final mass. The results showed that the decrease in mass increased with increasing soaking time. Comparison of mass loss at 10 days, 30 days and 60 days is very significant. This is caused because the metal skin layer has been damaged. As time increases, the corrosion rate also increases because the metal skin layer has been damaged due to corrosion by salt solution so that the strength of the steel decreases.
ABSTRAKBaja menjadi primadona yang banyak dimanfaatkan dalam peralatan penunjang bagi aktifitas manusia. Baja karbon merupakan logam yang mudah kena korosi. Tujuan penelitian ini untuk mengetahui pengaruh waktu perendaman paduan baja st 37 terhadap laju korosi . Metode penelitian yang di gunakan adalah menganalisa pengurangan massa. Metode ini merupakan metode pengukuran laju korosi paling simpel yakni massa sampel sebelum dan setelah dilakukan pengujian di timbang untuk mengetahui selisih massa. Data dikumpulkan dengan menghitung massa baja St 37 yang telah di bersihkan dari oksida dan massa tersebut di nyatakan sebagai massa awal, lalu di lakukan perendaman pada air garam selama 10 hari,30 hari dan 50 hari. Setelah itu di lakukan perhitungan massa kembali pada baja yang telah di rendam dan massa tersebut di nyatakan sebagai massa akhir. Hasil penelitian menunjukkan bahwa penurunan massa meningkat seiring dengan bertambahnya waktu rendaman. Perbandingan penurunan massa pada 10 hari , 30 hari dan 60 hari sangat signifikan. Hal ini di sebabkan karena lapisan kulit logam sudah rusak. Seiring dengan bertambahnya waktu, maka laju korosi juga semakin meningkat di karenakan lapisan kulit logam yang telah rusak akibat terkorosi oleh larutan garam sehingga kekuatan baja menurun.
MENINGKATKAN PRESTASI BELAJAR BAHASA INGGRIS MELALUI PEMBELAJARAN KOOPERATIF MODEL TGT PADA SISWA KELAS XI MIA DI SMA NEGERI 2 MALINAU
Authors: SETIAWAN ADI
Published: January 2023

The various negative impacts of using the group work method could have been avoided if only the teacher had spent more time and attention in preparing and developing group work methods. What is introduced in the cooperative learning method is not just group work, but its structuring. So, cooperative learning teaching systems can be defined as structured group work/study. The aims of this study were: (a) To reveal the effect of the TGT cooperative learning model on English learning outcomes. (b) Want to know how far the understanding and mastery of English subjects after the implementation of the TGT cooperative learning model This research uses three rounds of action research. Each round consists of four stages: design, activity and observation, reflection, and revision. The target of this study were students of class XI - MIA. The data obtained was in the form of formative test results, observation sheets of teaching and learning activities. From the results of the analysis, it was found that student achievement increased from cycle I to cycle II, namely, cycle I (31%) and cycle II (78.00%). The conclusion of this study is that the cooperative method of the TGT model can have a positive effect on the learning motivation of Class XI - MIA students and this learning model can be used as an alternative to English.
ABSTRAKBerbagai dampak negatif dalam menggunakan metode kerja kelmpok tersebut seharusnya bisa dihindari jika saja guru mau meluangkan lebih banyak waktu dan perhatian dalam mempersiapkan dan menyusun metode kerja kelompok. Yang diperkanalkan dalam metode pembelajaran cooperative learning bukan sekedar kerja kelompok, melainkan pada penstrukturannya. Jadi, sistema pengajaran cooperative learning bisa didefinisikan sebagai kerja/belajar kelompok yang terstruktur. Tujuan dari penelitian ini adalah: (a) Untuk mengungkap pengaruh pembelajaran kooperatif model TGT terhadap hasil belajar Bahasa Inggris. (b) Ingin mengetahui seberapa jauh pemahaman dan penguasaan mata pelajaran Bahasa Inggris setelah diterapkannya pembelajaran kooperatif model TGT Penelitian ini menggunakan penelitian tindakan (action research) sebanyak tiga putaran. Setiap putaran terdiri dari empat tahap yaitu: rancangan, kegiatan dan pengamatan, refleksi, dan refisi. Sasaran penelitian ini adalah siswa kelas XI - MIA Data yang diperoleh berupa hasil tes formatif, lembar observasi kegiatan belajar mengajar. Dari hasil analis didapatkan bahwa prestasi belajar siswa mengalami peningkatan dari siklus I sampai siklus II yaitu, siklus I (31%) dan siklus II (78,00%). Kesimpulan dari penelitian ini adalah metode kooperatif model TGT dapat berpengaruh positif terhadap motivasi belajar Siswa Kelas XI - MIA serta model pembelajaran ini dapat digunakan sebagai salah satu alternative Bahasa Inggris.
PENERAPAN MODEL PEMBELAJARAN THINK TALK WRITE UNTUK MENINGKATKAN HASIL BELAJAR BAHASA INGGRIS SUBTEMA INTRODUCE MYSELF PADA SMP NEGERI 1 SIPOHOLON
Authors: SIMANJUNTAK LAMRIA ROIDA
Published: January 2023

This study aims to describe the process and learning outcomes of class VII C students of SMP Negeri 1 Sipoholon in learning English with the introduce myself sub-theme after participating in learning using the TTW (Think-Talk-Write) learning model. This research is a classroom action research carried out collaboratively between researchers as English subject teachers and homeroom teachers for class VII C. The actions were carried out in 2 cycles with each cycle consisting of 2 meetings. The research subjects were class VII C students of SMP Negeri 1 Sipoholon Semester 1 of the 2022/2023 Academic Year with a total of 32 students. Data collection techniques in this study used tests and documentation. Data validation uses triangulation techniques. The results showed that the average value of learning outcomes and completeness which continued to increase in the initial study was only 59.38, rising to 69.38 in the first cycle, and 77.50 in the second cycle, with a learning completeness level of 10 students (31.25 %) in the initial study, 59.38% or 19 students in the first cycle, 28 students or 87.50% in the second cycle. Thus it can be concluded that through the application of the TTW (Think-Talk-Write) learning model it is effective in improving student learning outcomes in class VII C of SMP Negeri 1 Sipoholon Semester 1 Academic Year 2022/2023 in learning English with the theme introduce myself.
ABSTRAKPenelitian ini bertujuan untuk mendeskripsikan proses dan hasil belajar siswa kelas VII C SMP Negeri 1 Sipoholon pada pembelajaran bahasa Inggris subtema introduce myself setelah mengikuti pembelajaran dengan model pembelajaran TTW (Think-Talk-Write). Penelitian ini merupakan penelitian tindakan kelas yang dilakukan secara kolaboratif antara peneliti sebagai guru mata pelajaran bahasa Inggris dan wali kelas VII C. Tindakan dilaksanakan dalam 2 siklus dengan masing-masing siklus terdiri dari 2 pertemuan. Subjek penelitian adalah siswa kelas VII C SMP Negeri 1 Sipoholon Semester 1 Tahun Pelajaran 2022/2023 dengan jumlah siswa sebanyak 32 siswa. Teknik pengumpulan data dalam penelitian ini menggunakan tes, dan dokumentasi. Validasi data menggunakan teknik triangulasi. Hasil penelitian menunjukkan bahwa nilai rata-rata hasil dan ketuntasan belajar yang terus meningkat pada studi awal hanya 59,38 naik menjadi 69,38 pada siklus pertama, dan 77,50 pada siklus kedua, dengan tingkat ketuntasan belajar sebanyak 10 siswa (31,25%) pada studi awal, 59,38% atau 19 siswa pada siklus pertama, 28 siswa atau 87,50% pada siklus kedua. Dengan demikian dapat disimpulkan bahwa melalui penerapan model pembelajaran TTW (Think-Talk-Write) efektif untuk meningkatkan hasil belajar siswa kelas VII C SMP Negeri 1 Sipoholon Semester 1 Tahun Pelajaran 2022/2023 pada pembelajaran bahasa Inggris subtema introduce myself.
WORD SQUARE DAN TEKA TEKI SILANG UNTUK MENINGKATKAN AKTIVITAS SISWA KELAS XII MIPA MATERI MEDAN MAGNET
Authors: WAHYUNINGSIH SRI
Published: January 2023

This study aims to increase the activity of class XII MIPA students at SMA Negeri Rembang. This classroom action research applies two cycles, with each cycle two meetings. Word squares are used to apply conceptual understanding while crosswords are used to apply calculation questions. The results of this study are visual activity, in the aspect of reading questions and students looking for references, in cycle 1 there are 1 to 8 students so it has a value of 1.67, meaning that the assessment criteria are less active. Oral activity, in terms of the number of students who submitted answers in cycle 1 has a value of 1.67, meaning that the assessment criteria are less active. Listening activity has a value of 1.5, meaning that the assessment criteria are less active. Likewise with writing activities and emotional activities. As for motor activity, namely conducting experiments, the value is good. In cycle 2, visual activities, oral activities, listening activities, writing activities and emotional activities, the students' activities increased so that they were quite active. Meanwhile, in motor activity and emotional activity, the number of students doing the experiment increased with joy. This classroom action research resulted in an increase in activity until the value was quite active.
ABSTRAKPenelitian ini bertujuan untuk meningkatkan aktivitas siswa kelas XII MIPA SMA Negeri Rembang. Penelitian tindakan kelas ini menerapkan dua siklus, dengan tiap siklus dua pertemuan. Word square dipakai untuk penerapan pemahaman konsep sedangkan teka-teki silang untuk menerapkan soal hitungan. Hasil penelitian ini Aktivitas visual, pada aspek membaca soal pertanyaan dan siswa yang mencari referensi, di siklus 1 ada 1 sampai 8 siswa sehingga memiliki nilai 1,67, artinya kriteria penilaiannya adalah kurang aktif. Aktivitas Oral, pada aspek banyaknya siswa yang mengajukan jawaban pada siklus 1 memiliki nilai 1,67 artinya kriteria penilaiannya kurang aktif. Aktivitas Listening bernilai 1,5 artinya ktiteria penilaiannya kurang aktif. Demikian juga dengan aktivitas writing dan aktivitas emosional. Sedangkan untuk aktivitas motorik yaitu melakukan percobaan nilainya baik. Pada siklus ke 2, aktivitas visual, aktivitas Oral, Aktivitas Listening, aktivitas writing dan aktivitas emosional, siswa yang beraktivitas semakin bertambah sehingga cukup aktif. Sedangkan di aktivitas motorik dan aktivitas emosional, dengan rasa gembira sejumlah siswa yang melakukan percobaan bertambah. Penelitian tindakan kelas ini menghasilkan peningkatan aktivitas sampai nilai cukup  aktif.
Composited analyses of the chemical and physical characteristics of co-polluted days by ozone and PM2.5 over 2013–2020 in the Beijing–Tianjin–Hebei region
Authors: Dai Huibin , Liao Hong , Li Ke , Yue Xu , Yang Yang , Zhu Jia , Jin Jianbing , Li Baojie , Jiang Xingwen
Published: January 2023

Abstract. The co-polluted days by ozone (O3) and
PM2.5 (particulate matter with an aerodynamic equivalent diameter of 2.5 µm or less) (O3–PM2.5PDs) were frequently observed in the Beijing–Tianjin–Hebei (BTH) region in warm seasons (April–October) of 2013–2020. We applied the 3-D global chemical transport model (GEOS-Chem) to
investigate the chemical and physical characteristics of
O3–PM2.5PDs by composited analyses of such days that were
captured by both the observations and the model. Model results showed that,
when O3–PM2.5PDs occurred, the concentrations of hydroxyl
radical and total oxidant, sulfur oxidation ratio, and nitrogen oxidation
ratio were all high, and the concentrations of sulfate at the surface were
the highest among all pollution types. We also found unique features in
vertical distributions of aerosols during O3–PM2.5PDs;
concentrations of PM2.5 decreased with altitude near the surface but
remained stable at 975–819 hPa. Process analyses showed that secondary
aerosols (nitrate, ammonium, and sulfate) had strong chemical productions at
913–819 hPa, which were then transported downward, resulting in the quite
uniform vertical profiles at 975–819 hPa on O3–PM2.5PDs. The
weather patterns for O3–PM2.5PDs were characterized by anomalous high-pressure system at 500 hPa as well as strong southerlies and high RH at 850 hPa. The latter resulted in the strong chemical productions around 850 hPa on O3–PM2.5PDs. The physical and chemical characteristics of
O3–PM2.5PDs are quite different from those of polluted days by
either O3 alone or PM2.5 alone and have important implications
for air quality management.
Debris-flow surges of a very active alpine torrent: a field database
Authors: Lapillonne Suzanne , Fontaine Firmin , Liebault Frédéric , Richefeu Vincent , Piton Guillaume
Published: January 2023

Abstract. This paper presents a protocol to analyze debris flow focusing on the surge scale rather than the full scale of the debris flow event, as well as its application to a French site. Providing bulk surge features like volume, peak discharge, front height, front velocity and Froude numbers allows for numerical and experimental debris flow investigations to be designed with narrower physical ranges and thus, for deeper scientific questions to be explored. We suggest a method to access such features at surge scale that can be applied to a wide variety of monitoring stations. Requirements for monitoring stations for the protocol to be applicable include (i) a flow stage measurements, (ii) a cross section hypothesis and (iii) a velocity estimation. Raw data from three monitoring stations on the Réal torrent (drainage area: 2 km2 , South-East France) are used to illustrate an application on 34 surges measured from 2011 to 2020 on the three monitoring stations. Volumes of debris-flow surges on the Réal Torrent are typically sized at a few thousand cubic meters. Peak flow height of surges range from 1 to 2 m. Peak discharge range around a few dozens cubic meters per second. Finally, we show that Froude numbers of such surges are near critical.
Coastal earthquake induced landslide susceptibility during the 2016 Mw 7.8 Kaikōura earthquake, New Zealand
Authors: Bloom Colin K. , Singeisen Corinne , Stahl Timothy , Howell Andrew , Massey Chris , Mason Dougal
Published: January 2023

Abstract. Coastal hillslopes often host higher concentrations of earthquake induced landslides than those further inland, but few studies have investigated the reasons for this occurrence. As a result, it remains largely unclear if regional earthquake induced landslide susceptibility models trained primarily on inland hillslopes are effective predictors of coastal susceptibility. The 2016 Mw 7.8 Kaikōura earthquake on the northeast South Island of New Zealand resulted in c. 1,600 landslides > 50 m2 on slopes > 15° within 1 km of the coast. This forms an order of magnitude greater landslide source area density than inland hillslopes within 1 to 3 km of the coast. In this study, the distribution of regionally predictive landslide susceptibility variables, or features, and logistic regression modelling are used to investigate how landslide susceptibility differs between coastal and inland hillslopes and determine the factors that drive the distribution of coastal landslides initiated by the 2016 Kaikōura earthquake. Strong model performance (Area under the Receiver Operator Characteristic Curve or AUC of c. 0.80 to 0.92) was observed across eight models, which adopt four simplified geology types. The same landslide susceptibility factors, primarily geology, steep slopes, and ground motion are strong model predictors for both inland and coastal landslide susceptibility in the Kaikōura region. In three geology types (which account for more than 90 % of landslides source areas) a 0.03 or less drop in model AUC is observed when predicting coastal landslides using inland trained models. This suggests little difference between the features driving inland and coastal landslide susceptibility in the Kaikōura region. Geology is similarly distributed between inland and coastal hillslopes and PGA is generally lower in coastal hillslopes. Slope angle, however, is significantly higher in coastal hillslopes and provides the best explanation for the high density of coastal landslides during the 2016 Kaikōura earthquake. Existing regional earthquake induced landslide susceptibility models trained on inland hillslopes using common predictive features are likely to capture this signal. Interestingly, in the Kaikōura region, most coastal hillslopes are isolated from the ocean by uplifted shore platforms. Enhanced coastal landslide susceptibility from this event appears to be a legacy effect of past active erosion, which preferentially steepened these coastal hillslopes.
Effect of radiation interaction and aerosol processes on ventilation and aerosol concentrations in a real urban neighbourhood in Helsinki
Authors: Strömberg Jani , Li Xiaoyu , Kurppa Mona , Kuuluvainen Heino , Pirjola Liisa , Järvi Leena
Published: January 2023

Abstract. Large eddy simulation (LES) provides an optimal tool to examine air pollutant concentrations at high temporal and spatial resolutions within urban neighborhoods. The local mixing conditions are to a large extent a result of building morphology and thermal conditions impacting mechanically and thermally driven turbulence. However, the impact of thermal conditions on local air pollutant concentrations in real urban environments is not well understood nor the importance of including thermal processes in LES. Furthermore, LES of aerosol particle concentrations in urban areas rarely include aerosol processes, but rather aerosols are treated as passive scalars. The aim of this study is to examine the importance of radiative heating and aerosol processes in simulating local aerosol particle concentrations in a wide street canyon and its surroundings in Helsinki under morning rush hour with calm wind conditions using the LES model PALM. The model outputs are evaluated against mobile laboratory measurements of air temperature and total particle number concentration (Ntot), and drone measurements of lung deposited surface area (LDSA). The inclusion of radiation interaction in LES has a significant impact on simulated near surface temperatures in our study domain increasing them on average by 3.8 °C from 8.6 °C to 12.4 °C. The thermal processes further strengthen the flow field, and enhance the ventilation of air pollutants from the street canyon by altering the canyon vortex. The enhanced ventilation reduces the pedestrian level (4 m) Ntot by 53 %. The reduction of Ntot due to aerosol processes is smaller, only 18 %. Aerosol processes have a larger effect in the smallest particle range, decreasing particle concentrations below 10 nm by up to 2.5 orders of magnitude whereas radiation interaction is more important in the larger particle range. Aerosol processes have a stronger impact than ventilation on LDSA, whereas radiation interaction shows a larger decrease in PM2.5 than in other aerosol metrics. The inclusion of radiation interaction in PALM improves the modelled near-surface temperatures and Ntot when compared to mobile laboratory measurements reducing the bias between the modelled and measured temperatures from -3.9 °C to +0.2 °C, and concentrations from +98 % to -13 %. With both aerosol and radiation interaction on, the underestimation was 16 %, which might be due to overestimation of the ventilation. The results show how inclusion of radiative interaction, and to a lesser extent aerosol processes, on LES are important for realistic simulation of near surface aerosol particle concentrations. This particularly in a calm wind situation such as modelled in this study.
TiP-Leaf: a dataset of leaf traits across vegetation types on the Tibetan Plateau
Authors: Jin Yili , Wang Haoyan , Xia Jie , Ni Jian , Li Kai , Hou Ying , Hu Jing , Wei Linfeng , Wu Kai , Xia Haojun , Zhou Borui
Published: January 2023

Abstract. Functional trait databases are emerging as a crucial tool
for a wide range of ecological studies, including next-generation vegetation modelling across the world. However, few large-scale studies have
been reported on plant traits in the Tibetan Plateau (TP), the cradle of
East Asian flora and fauna with specific alpine ecosystems, and no report on plant trait databases could be found. In this work, an extensive dataset of
11 leaf functional traits (TiP-Leaf), mainly for herbs and shrubs and a few trees on the TP, was compiled through field surveys. The TiP-Leaf dataset,
which was compiled from 336 sites distributed mainly on the plateau surface and the northern margin of the TP across alpine and temperate vegetation
regions and sampled from 2018 to 2021, contained 1692 morphological trait
measurements of leaf thickness, leaf fresh weight, leaf dry weight, leaf
dry-matter content, leaf water content, leaf area, specific leaf area and
leaf mass per area and 1645 chemical element trait measurements of leaf
carbon, nitrogen and phosphorus contents. Thus, 468 species that belong to
184 genera and 51 families were obtained and measured. In addition to leaf
trait measurements, the geographic coordinates, bioclimate variables,
disturbance intensities and vegetation types of each site were also recorded. The dataset could provide solid data support to effectively quantify the
modern ecological features of alpine ecosystems, thereby further evaluating
the response of alpine ecosystems to climate change and human disturbances and improving the next-generation vegetation model. The dataset, which is
available from the National Tibetan Plateau Data Center (TPDC; Jin et al.,
2022a; https://doi.org/10.11888/Terre.tpdc.272516), can make a great
contribution to the regional and global plant trait databases.
A novel specimen-based mid-Paleozoic dataset of antiarch placoderms (the most basal jawed vertebrates)
Authors: Pan Zhaohui , Niu Zhibin , Xian Zumin , Zhu Min
Published: January 2023

Abstract. Antiarcha data are essential to quantitative studies of
basal jawed vertebrates. The absence of structured data on key groups of
early vertebrates, such as Antiarcha, has lagged in understanding their
diversity and distribution patterns. Previous works of early vertebrates
usually focused on anatomy and phylogeny, given their significant impacts on
the evolution of key characters, but lacked comprehensive structured data.
Here, we contribute an unprecedented open-access Antiarcha dataset covering
60 genera of 6025 specimens from the Ludfordian to the Famennian globally.
We have organized an expert team to collect and curate 142 publications
spanning from 1939 to 2021. Additionally, we have two-stage quality controls
in the process: domain experts examined the literature and senior experts
reviewed the results. In this paper, we give details of the data storage
structure and visualize these antiarch fossil sites on the paleogeographic
map. The novel Antiarcha dataset has tremendous research potential,
including testing previous qualitative hypotheses in biodiversity changes,
spatiotemporal distribution, evolution, and community composition. It is now
an essential part of the DeepBone database and will be updated with the latest
publication, also available on https://doi.org/10.5281/zenodo.6536446 (Pan and
Zhu, 2021).
Prediction of algal blooms via data-driven machine learning models: an evaluation using data from a well-monitored mesotrophic lake
Authors: Lin Shuqi , Pierson Donald C. , Mesman Jorrit P.
Published: January 2023

Abstract. With increasing lake monitoring data, data-driven machine
learning (ML) models might be able to capture the complex algal bloom
dynamics that cannot be completely described in process-based (PB) models.
We applied two ML models, the gradient boost regressor (GBR) and long short-term
memory (LSTM) network, to predict algal blooms and seasonal changes in algal
chlorophyll concentrations (Chl) in a mesotrophic lake. Three predictive
workflows were tested, one based solely on available measurements and the
others applying a two-step approach, first estimating lake nutrients that
have limited observations and then predicting Chl using observed and
pre-generated environmental factors. The third workflow was developed
using hydrodynamic data derived from a PB model as additional training
features in the two-step ML approach. The performance of the ML models was
superior to a PB model in predicting nutrients and Chl. The hybrid model
further improved the prediction of the timing and magnitude of algal blooms.
A data sparsity test based on shuffling the order of training and testing
years showed the accuracy of ML models decreased with increasing sample
interval, and model performance varied with training–testing year
combinations.
ISAT v2.0: An integrated tool for nested domain configurations and model-ready emission inventories for WRF-AQM
Authors: Wang Kun , Gao Chao , Wang Haofan , Wu Kai , Tong Qingqing , Dan Mo , Liu Kaiyun , Ji Xiaohui
Published: January 2023

Abstract. An integrated tool, ISAT (Inventory Spatial Allocation Tool) v2.0, was developed to configure nested domains, downscale regional emission inventories, allocate local emission inventories, and generate model-ready emission inventories for the Weather Research and Forecasting (WRF)-Air quality numerical model (AQM). We built four modules into this tool: i) “Prepgrid” conducted a nested domain configuration algorithm based on WRF-AQM nested rules and the target domain shapefile; ii) “Downscale” established a “sub-grid nearest” method to improve both the accuracy and computational efficiency of downscaling the regional emission inventory based on spatial surrogate; iii) “Mapinv” allocated a user-defined regional/city-level emission inventory to grid level based on the target domain shapefile and the spatial surrogate; and iv) “Prepmodel” introduced unique user-friendly emission sector IDs using abbreviations and speciation profiles based on species in the emission inventory and chemical mechanisms for model-ready inventories. The inline format model-ready emission inventory built into this tool is available for both the CMAQ and CAMx. This tool will help model users establish workflow from configuring the research domain to running WRF-AQM. The tool’s framework and related algorithms will also help researchers develop emission inventory processing tools for WRF-AQM.
ANALISIS AKTIVITAS ANTIOKSIDAN, UJI ORGANOLEPTIK, KANDUNGAN GIZI COOKIES DENGAN PENAMBAHAN PASTA UBI JALAR UNGU (Ipomoea batatas) DAN TEPUNG OAT (Avena sativa)
Authors: Wati Herna
Published: January 2023

Antioksidan merupakan senyawa yang mampu menghambat radikal bebas dengan cara memberikan elektron ke senyawa lainnya agar menjadi stabil. cookies pasta ubi jalar ungu dan tepung oat berpotensi sebagai makanan fungsional. Tujuan dari penelitian ini untuk mengetahui aktivitas antioksidan, daya terima panelis dan kandungan gizi diperoleh pada cookies dengan penambahan pasta ubi jalar ungu dan tepung oat. Penelitian ini menggunakan Rancangan Acak Kelompok dua faktor yaitu formulasi cookies pasta ubi jalar ungu dan tepung oat suhu Penelitian ini meliputi analisis aktivitas antioksidan, organoleptik dan proksimat. Hasil penelitian menunjukkan bahwa Perlakuan F3K1 menunjukkan persen inhibisi tertinggi sebesar 64,60% dengan IC50 59 µg/ml. Perlakuan F1K3 menunjukkan persen inhibisi terendah sebesar 31,58% dengan IC50 257 µg/ml. Uji organoleptik warna tertinggi diperoleh pada perlakuan F1K2 3,73 (suka), dan terendah perlakuan F2K1 2,99 (biasa). Uji aroma tertinggi diperoleh pada perlakuan F1K1 3,87 (suka), dan terendah perlakuan F2K1 3,09 (biasa). Uji rasa tertinggi diperoleh pada perlakuan F1K2 3,88 (suka), dan terendah perlakuan F3K3 3,11 (biasa). Uji organoleptik tekstur tertinggi diperoleh pada perlakuan F1K2 3,88 (suka), dan terendah perlakuan F3K3 2,95 (biasa). Uji organoleptik keseluruhan tertinggi diperoleh pada perlakuan F1K2 3,88 (suka), dan terendah perlakuan F3K3 3,08 (biasa). Kandungan gizi cookies dengan aktivitas antioksidan tertinggi yaitu kadar air 3,12%, kadar abu 2,51%, kadar protein 10,49%, kadar lemak 31,50%, dan kadar karbohidrat 51,37%. Penambahan pasta ubi jalar ungu dan tepung oat dapat mempengaruhi nilai aktivitas antioksidan sehingga cookies dapat berpotensi sebagai makanan fungsional.
DAYA TERIMA FORMULASI SOSIS IKAN GABUS (CHANNA STRIATA) DAN BAYAM MERAH (AMARANTHUS TRICOLOR L.) SEBAGAI PANGAN FUNGSIONAL TINGGI PROTEIN DAN ZAT BESI
Authors: Nurjuliani Nadya Indah
Published: January 2023

Gizi merupakan faktor yang penting dalam proses metabolisme dalam tubuh. Jika tubuh kekurangan gizi maka tidak dapat melakukan aktifitas yang baik. Saat ini belum banyak modifikasi sosis yang dijadikan sebagai salah satu sumber zat besi dan protein. Oleh karena itu, salah satu pangan lokal yang berpotensi untuk digunakan adalah ikan gabus dan bayam merah. Penelitian ini bertujuan untuk mengetahui daya terima formulasi sosis ikan gabus dan bayam merah sebagai pangan fungsional tinggi protein dan zat besi. Penelitian ini merupakan jenis penelitian eksperimen murni, dengan desain Rancangan Acak Lengkap (RAL) dengan 3 kali pengulangan yang terdiri dari 1 faktor yaitu proporsi formulasi sosis ikan gabus dan bayam merah. Penelitian ini meliputi uji daya terima dengan metode uji hedonik dan mutu hedonik, uji proksimat dan zat besi. Hasil penelitian menunjukkan bahwa daya terima formulasi sosis ikan gabus dan bayam merah dari aspek warna, aroma, rasa dan tekstur yang paling disukai terdapat pada formulasi sosis ikan gabus dan bayam merah dengan proporsi 65g ikan gabus dan 35g bayam merah secara keseluruhan memperoleh hasil yang cukup baik, berdasarkan uji sensoris mengahasilkan hedonik warna agak disukai, sedangkan aroma, tekstur dan rasa disukai, mutu hedonik warna coklat berecak merah, mutu hedonik aroma beraroma ikan gabus dan bayam merah, mutu hedonik tekstur kenyal dan mutu hedonik rasa sangat berasa ikan gabus dan bayam merah. Nilai kandungan gizi berdasarkan formulasi sosis ikan gabus dan bayam merah yang paling disukai yaitu energi 186,0g, lemak 7,83g, protein 4,90g, karbohidrat 18,14g, zat besi 13,4mg.