bluuebunny/crossref_metadata_2025 huggingface dataset:
Open Water Swimming
Authors: Munatones Steven
Published: May 2023

Swim faster, stronger, and more efficiently. Whether you are a dedicated open-water swimmer or a triathlete looking to conquer the sport’s most challenging event, Open Water Swimming is your complete guide to improving your performance and decreasing your time.

In Open Water Swimming, renowned marathon swimmer, coach, and commentator Steven Munatones shares his insights and expertise on preparing, training, and competing in open-water events. From triathlon to marathon and all distances in between, you’ll learn these tactics:

• Refine your freestyle stroke to improve power, speed, effectiveness, and navigational IQ.

• Pace yourself, and conserve energy, for faster finishes.

• Train for every event with conditioning programs for short, Olympic, marathon, and triathlon distances.

• Shave seconds off your time with professional tactics for starts, turns, feedings, transitions, and finishes.

• Incorporate the racing strategies of the most successful swimmers in the sport.

• Prepare physically and psychologically for the demands of competition.

From the art of efficient pack swimming to the best dryland and pool workouts for improving endurance, strength, and power, Open Water Swimming covers it all. Read it, refer to it, and rely on it for improved results and faster times!
Hockey Goaltending
Authors: Wilson Eli , Vliet Brian van
Published: May 2023

Awareness, anticipation, physical conditioning . . . these are just some of the qualities a goaltender needs to bring onto the ice at game time. Excellence requires practice, consistency, and understanding—of the position, the situation, and your talents.

No one knows this better than Eli Wilson does. Widely recognized as the leading authority on goaltending, he has worked alongside 30 NHL goaltenders, including Carey Price, Ray Emery, Tuukka Rask, and Brian Elliott.

In Hockey Goaltending, Eli Wilson and Brian van Vliet have created the definitive guide to stopping more pucks, winning more games, and lowering your goals against average. Inside, you will find coverage on every facet of the position:

• Selection of the right equipment for fit and functionality

• Stance and presence in the net, including footwork, stick placement, and body positioning

• Puck stopping, from save selection to execution

• Postsave recovery strategies, including controlling and directing rebounds

• Tactics for breakaways, odd-man rushes, and wraparounds

• Focus and visualization methods to improve the mental game

• On- and off-ice drills and training programs for year-round conditioning to increase strength, stamina, speed, and agility

• Suggestions for building productive relationships between head coaches, goaltending coaches, and goaltenders

From skills to strategies, equipment to exercises, Hockey Goaltending covers the position like no other. Packed with drills, step-by-step instructions, photos, diagrams, and coaching tips, this book touches on every aspect of the game so you can compete at the highest level.
Ultimate Skiing
Authors: LeMaster Ron
Published: May 2023

Whether you are a first time skier or regularly take to the slopes, your chances of an enjoyable – and injury free - holiday are greatly enhanced if you prepare for the physical exertion of skiing.

This book offers readers a fitness programme specifically designed for the rigours of skiing. The book begins with an overview of the most common injuries that skiers suffer, plus a look at what areas of fitness you need to focus on in order to get the most out of your skiing - strength, CV fitness and flexibility.

The book has two sections, one aimed at those new to skiing and one aimed at the more advanced skier. Both sections will include programmes to be undertaken in the months and weeks leading up to the skiing trip, but there will also be year round programmes that can be incorporated into the reader's regular exercise programme, offering year round skiing fitness.
Mastering Mountain Bike Skills
Authors: Lopes Brian , Mccormack Lee
Published: May 2023

If you want to ride like a pro, you should learn from a pro! In Mastering Mountain Bike Skills, Third Edition, world-champion racer Brian Lopes and renowned riding coach Lee McCormack share their elite perspectives, real-life race stories, and their own successful techniques to help riders of all styles and levels build confidence and experience the full exhiliration of the sport.

Mastering Mountain Bike Skills is the best-selling guide for all mountain biking disciplines, including enduro, pump track racing, dual slalom, downhill, cross-country, fatbiking, and 24-hour races. It absolutely captures the sport and offers everything you need to maximize performance and excitement on the trail. Learn how to select the proper bike and customize it for your unique riding style. Develop a solid skills base so you can execute techniques with more power and precision. Master the essential techniques to help you carve every corner, nail every jump, and conquer every obstacle in your path. Last, but not least, prepare yourself to handle every type of weather and trail condition that the mountain biking world throws at you.

Whether you're a recreational rider looking to rock the trails with friends, are a seasoned enthusiast, or are aspiring to be a top pro, Mastering Mountain Bike Skills will improve your ride and dust the competition. Don't just survive the trail–own the trail, and enjoy the thrill of doing it.
The Complete Soccer Goalkeeper
Authors: Mulqueen Tim , Woitalla Mike
Published: May 2023

“If you ask me when I really knew I wanted to be a goalkeeper, I trace it to when Tim Mulqueen started training me at a New Jersey soccer camp when I was 12 years old... [The Complete Soccer Goalkeeper] is more than a series of exercises: It delves into all the aspects of the position and the coach-player relationship... And that's what makes this book so valuable to the future of goalkeepers--it speaks to both the player and the coach.” Tim Howard-- U.S. Soccer Men‘s National Team, Everton Football Club “The Complete Soccer Goalkeeper is a must-have for goalkeepers and their coaches. From tactics to strategies, Mulqueen and Woitalla cover it all.” Peter Nowak -- Head Coach, Philadelphia Union
Health Fitness Management
Authors: Bates Mike , Spezzano Michael J. , Danhoff Guy
Published: May 2023

Health Fitness Management, Third Edition, provides an in-depth picture of the challenging and rewarding role of the health and fitness club manager. Leading experts in the fitness industry share their insights in a practical manner, making this text the most authoritative and field-tested guide to fitness management success.

Whether they are providing service to members, ensuring club safety and profitability, or motivating staff to perform at their best, health and fitness club managers need the right mix of skills and flexibility to support the success and continued growth of their clubs. This third edition addresses recently emerging topics and offers practical tools that will help health club managers succeed:

• Opening chapter scenarios set the stage and put readers in the shoes of a club manager.

• New case studies emphasize the importance of thoroughly understanding legal responsibilities and obligations.

• Best practices and tips for managing social media pages give the reader practical ways to maximize marketing efforts and grow the business.

• Reproducible forms save time in creating templates for common agreements and records, such as a membership agreement, an equipment maintenance form, and a guest registration and exercise liability waiver.

To further support its applied approach, Health Fitness Management, Third Edition, incorporates updated research and industry trends as it leads readers through key managerial development areas. It starts with organizational fundamentals and the payoffs of thoughtful staff recruitment, training, development, and retention. It then shifts to methods for attracting and retaining members while also increasing profitability with the right mix of products and services. Finally, it reviews operational and facility management functions, covering everything from reading financial statements and maintaining equipment to understanding and managing risk.

To aid with retention and for easy reference, The Bottom Line segments sum up the key points to emphasize the most important topics in the text. Learning objectives, key terms, and a list of references round out each chapter to foster a better learning experience. Instructors will have access to an instructor guide, which contains additional practical assignments, and a test package for gauging student comprehension.

Written by industry experts, Health Fitness Management, Third Edition, is the fundamental resource for the management and operation of health and fitness facilities and programs. Enhanced with practical scenarios and applied knowledge, it provides a solid foundation for students preparing for a management career in the health and fitness industry, and it serves as an essential reference for professionals already enjoying the challenges and opportunities of club management.

AUDIENCE

A text for upper-level undergraduate students taking fitness management or related business courses. Also a professional reference for club managers and owners.
Contemporary Leadership in Sport Organizations
Authors: Scott David
Published: May 2023

In a quickly growing and evolving society, organizations at all levels face ongoing challenges and complexities that require specific leadership skills. Contemporary Leadership in Sport Organizations, Second Edition, brings together research on leadership–both within and outside of sport settings–to provide comprehensive knowledge of skills and practices relevant to the sport industry. With sport-specific examples, students will learn an effective approach to leadership thought, strategy, and action to apply in recreational, interscholastic, intercollegiate, and professional sport organizations as well as the rapidly growing esports industry.

Students will first learn the historical and foundational concepts of leadership, defining what effective leadership is and the primary outcomes of good leadership. Contemporary thought and leadership approaches for present-day challenges are then presented, bringing concepts to life within the unique contexts of sport organizations of all levels and types. Modern leadership concepts that are explored include emotional intelligence and its role in developing authentic leadership, data-informed decision making and problem solving, behaviors and actions that are most effective in crisis situations, and the leadership-as-practice movement.

Updates in this edition include the following:

• Expanded content on leadership for achieving diversity, equity, and inclusion in sport organizations, including new content on LGBTQ+ research in sport

• Content on global leadership in sport, including the emergence of esports and sport as a tool for social change

• Discussion of ethical decision making and the challenges and responsibilities for leaders in the development of the values and culture of an organization

Case studies (some of which include video examples) expand on chapter content and present real-world examples of sport leadership across a broad range of roles. These contain open-ended discussion questions that encourage students to think critically about the cases and about their own future careers. Activities encourage students to put research into practice, while interactive branching scenarios immerse students in the decision-making process, applying strategies presented in the book to navigate through each simulation to discover the most optimal outcome.

Modern sport organizations at all levels are evolving into increasingly complex and diverse entities that require adaptable and effective leaders. Contemporary Leadership in Sport Organizations provides the theoretical knowledge and practical skills to inspire students to become successful leaders in the sport industry.

AUDIENCE

Primary text for upper-level undergraduate or graduate sport management courses in sport leadership; reference for academic libraries and researchers in sport management and leadership.
Visualisasi Data Tingkat Kecenderungan Pelanggaran Syariat Di Kabupaten Bireuen Berbasis Web
Authors: Aina Nurul , Zulkifli Zulkifli , Johan T. Muhammad
Published: May 2023

Pelanggaran syariat islam di Kabupaten Bireuen mengalami peningkatan. Namun dalam proses pendataannya ada beberapa kendala yang menyebabkan proses terhambat, yaitu data yang di dokumentasikan masih berjalan secara manual atau belum semuanya melalui sistem. Untuk mengatasi permasalahan tersebut, perlu dirancang Sistem dengan menerapkan teknologi informasi sehingga dapat bekerja dengan cepat, dan akurat. Sistem ini terdiri dari dua tipe pengguna. Tipe pengguna tersebut adalah Administrator dan Member. Metode pengembangan perangkat lunak yang di gunakan dalam perancangan adalah Metode Waterfall. Yaitu analisis, design, coding, pengujian dan pemeliharaan. Rancangan di implementasikan dengan menggunakan Data Flow Diagram (DFD), aplikasi secara umum dirancang dengan menggunakan bahasa pemrograman PHP  dan menggunakan Database Management System (DBMS) MySQL dengan PHP Data Objects (PDO) sebagai penghubung dan Macromedia Flash sebagai pendukungnya. Hasil penelitian ini yaitu menghasilkan suatu website yang dapat  membantu proses pendataan pelanggaran syariat islam di Kabupaten Bireuen dengan menampilkan Visual grafik pelanggar dalam setiap tahunnya, dan Visualisasi pengenalan syariat untuk membantu masyarakat mengenal syariat islam yang benar sesuai ketentuan agama.
Valensina schafft es gerade noch in die schwarzen Zahlen
Authors: Brück Mario
Published: May 2023

Der Fruchtsafthersteller profitiert vom strikten Kostenmanagement und Preiserhöhungen. Die Hauptmarke Valensina übertrifft die Erwartungen.
Essitys Umbaupläne treiben Konkurrenz um
Authors: Brändlein Philip
Published: May 2023

Die Überprüfung des Eigenmarkengeschäfts beim Tempo-Konzern Essity beschäftigt die Branche. Die Konkurrenz fürchtet den Einstieg eines Händlers.
Hochland spürt Druck aufs Markengeschäft
Authors: Lenders Dirk
Published: May 2023

Von einer „Preis-Zeitenwende“ ist im Geschäftsbericht von Hochland die Rede. Beim Käseabsatz hätten hierzulande Handelsmarken und der Discount ein Comeback erlebt. Zufrieden ist der Konzern mit dem Geschäft in Polen und Rumänien.
Der Aufwand für eine Klimastrategie wächst
Authors: Biehl Bernd
Published: May 2023

Für die Gäste der 14. Zukunftskonferenz des ZNU, Zentrum für nachhaltige Unternehmensführung der Uni Witten/Herdecke, gilt es, nachhaltiger zu werden und nicht irgendwelche Klimaneutralitätssiegel zu erreichen.
AltProtein-Report
Authors: Filko Nadine
Published: May 2023

Der AltProtein-Markt in Deutschland birgt Potenziale – vor allem im Bereich der Fermentation –, braucht aber Unterstützung von der Politik.
Harnessing technology and innovation to address emerging issues: Covid-19: Opportunities and challenges
Authors: Mercy Igoki Samuel , Langat Jackson
Published: May 2023

This study explores the opportunities and challenges presented through harnessing technology and innovation to address COVID-19 as an emerging issue in higher education institutions in Kenya. COVID-19 pandemic has presented unprecedented challenges to higher education institutions in sub-Saharan Africa, specifically in Kenya. The pandemic forced institutions to migrate to online learning, impacting the quality of education, enrollment rates, and mental health challenges students face. The study used a mixed-methods approach, incorporating secondary sources of information and primary data from experts such as Ministry of Education officials, university management, students' counsellors, and teaching staff from Kenyan universities. It focused on teaching and assessment delivery, enrollment rates, education quality, ICT infrastructure access, and mental health challenges. The study revealed that universities with established e-learning support departments were better equipped to transition to online learning, with the level of preparedness of teaching staff for online delivery is a significant factor in enhancing performance. However, enrollment rates did not increase significantly, and mental health challenges were common among students due to the digital divide. Higher education institutions in Kenya should invest in e-learning support departments and bridge the digital divide to prepare teaching staff for better online delivery. Universities should also consider a hybrid approach to teaching and learning that combines online and face-to-face delivery modes to ensure better learning outcomes.
Microwave-assisted extraction optimization and conventional extraction of phenolic compounds from coriander leaves: UHPLC characterization and antioxidant activity
Authors: Mouhoubi Khokha , Boulekbache-Makhlouf Lila , Madani Khodir , Freidja Mohamed Lamine , Silva Artur M.S. , Cardoso Susana M.
Published: May 2023

Background: Qualitative and quantitative investigations of bioactive compounds in plant materials are heavily based on the selection of an accurate extraction method. Aims: That’s why; this work consists of a comparative study between Microwave Assisted Extraction (MAE) and Conventional Extraction (CE), based on the total phenolic compounds (TPC) yield, phenolic profile, and antioxidant activity of coriander leaves powder (Coriandrum sativum L.). Material and Methods: MAE was optimized and performed using the Response Surface Methodology (RSM), and was modeled by using a second-order regression equation. While CE was done using the classic water bath method. Results: Under the optimal conditions, the recovery of TPC yield obtained was 37.94 ± 2.06 mg (MAE) vs 44.47 ± 0.57 mg GAE/g DW (CE). The UHPLC characterization showed a close phenolic composition of the two extracts, mainly represented by quercetin glucosides and by dimethoxycinnamoyl hexoside. No significant difference (p>0.05) was recorded in terms of the antioxidant activity of both extracts, as estimated by Ferric reducing antioxidant power (FRAP), Nitric oxide (NO•), and superoxide anion (O2•-) scavenging tests. Conclusions: Hence, the exploitation of MAE has many valuable advantages, as the processing time is brief and the antioxidant activities and phenolic composition were not affected by the extraction process.
PERAN MARKETPLACE DALAM MENINGKATKAN DAYA SAING UMKM DI INDONESIA
Authors: SAPUTRI SELFI ANGGRIANI , BERLIANA IRDA , BERLIANA IRDA , NASRIDA M.FARRAS
Published: May 2023

This paper aims to analyze the role of the marketplace in increasing the competitiveness of MSMEs in Indonesia in the current digitalization era, the marketplace has emerged as the main platform for micro, small and medium enterprises (MSMEs) in Indonesia to increase income, this does not rule out the possibility that the number of people using the internet in Indonesia is increasing and developing in the digital era must be able to adapt to technological advances that continue to develop. This research method uses a descriptive analysis approach as a qualitative method to understand and describe the marketPLACE role in increasing the competitiveness of MSMEs. Some marketplaces that are quite popular in Indonesia include Tokopedia, Shopee, Bukalapak, Lazada, and Blibli. MSMEs that use the marketplace have a great opportunity to attract consumers with a wider range and increase competitiveness in the market.

ABSTRAKTulisan ini bertujuan untuk menganalisis peran marketplace dalam meningkatkan daya saing UMKM di Indonesia di era digitalisasi saat ini, marketplace telah muncul sebagai platform utama bagi usaha mikro, kecil, dan menengah (UMKM) di Indonesia untuk meningkatkan pendapatan, hal ini tidak menutup kemungkinan bahwa jumlah orang yang menggunakan internet di Indonesia semakin meningkat dan berkembang di era digital harus mampu beradaptasi dengan kemajuan teknologi yang terus berkembang. Metode penelitian ini menggunakan pendekatan analisis deskriptif sebagai metode kualitatif untuk memahami dan mendeskripsika peran dalam meningkatkan daya saing UMKM. Adapun beberapa marketplace yang cukup populer di Indonesia antara lain Tokopedia, Shopee, Bukalapak, Lazada, dan Blibli. UMKM yang menggunakan marketplace memiliki peluang besar untuk menarik konsumen dengan jangkauan yang lebih luas dan meningkatkan daya saing di pasar.
PENGARUH PENERAPAN METODE STUDI KASUS DALAM EFEKTIFITAS PEMBELAJARAN
Authors: IBRAHIM IBRAHIM
Published: May 2023

This study aims to see how far the effect of applying the case study method is in creating learning effectiveness, especially in the State and Regional Financial Administration courses in semester VI students of the State Administration Study Program, Faculty of Social and Political Sciences, Universitas Pejuang Republic of Indonesia. The effectiveness of learning is measured from several indicators, including student participation in following the learning process starting from timeliness, participation in lectures, participation in discussions, participation in asking questions, participation in responding to answers and responses. With several indicators that serve as a reference in measuring the effectiveness of learning, one method that remains to be used is the application of the case study method. The case study learning method is a method that stimulates students to always think critically in an effort to solve a given case starting from problem formulation, data collection, data management, data analysis to drawing conclusions. With the teaching experience produced in the application of the case study method, students' attention is focused on the learning process which results in learning taking place effectively. And with the learning conditions created like this, it can guarantee the achievement of the learning objectives that have been formulated.
ABSTRAKPenelitian ini bertujuan untuk melihat sejauh mana pengaruh penerapan metode studi kasus dalam menciptakan efektifitas pembelajaran khususnya pada mata kuliah Administrasi Keuangan Negara dan Daerah pada mahasiswa semester VI Program Studi Ilmu Administrasi Negara fakultas Ilmu Sosial dan Ilmu Politik Universitas Pejuang Republik Indonesia. Efektifitas pembelajaran diukur dari beberapa indikator antara lain, partisipasi mahasiswa dalam mengikuti proses pembelajaran mulai dari ketepatan waktu, partisipasi dalam perkuliahan, partisipasi dalam diskusi, partisipasi dalam mengajukan pertanyaan, partisipasi dalam merespon jawaban dan tanggapan. Dengan beberapa indikator yang menjadi rujukan dalam mengukur efektifitas pembelajaran maka salah satu metode yang tetap untuk digunakan adalah penerapan metode studi kasus. Metode pembelajaran studi kasus adalah metode yang merangsang siswa untuk selalu berpikir kritis dalam upaya menyelesaikan kasus yang diberikan mulai dari perumusan masalah, pengumpulan data, pengelolaan data, análisis data sampai melahirkan kesimpulan. Dengan pengalaman mengajar yang dihasilkan dalam penerapan metode studi kasus maka siswa perhatiannya terfokus pada proses pembelajaran yang mengakibatkan pembelajaran berlangsung dengan efektif. Dan dengan kondisi pembelajaran yang tercipta seperti ini dapat menjami tercpainya tujuan pembelajaran yang telah dirumuskan.
PENGGUNAAN PARAGRAF DAN PERCAKAPAN PENDEK UNTUK MENINGKATKAN PEMAHAMAN TATA BAHASA INGGRIS
Authors: NUGROHO B. WIDI
Published: May 2023

English grammar is still a problem for students in class X Language and Culture SMA Kolese De Britto for the 2021-2022 academic year. For the topic modal verb should, 21 out of 27 students (78%) did not meet the KKM score of 75. After the topic was re-taught and a remedial bill was held, 11 students (41%) did not reach the KKM score. The main factor for the low understanding of English grammar is learning grammar that is not contextual. Data collection was carried out using three instruments: 1) a self-observation sheet in the form of a checklist to ensure that all learning steps were carried out properly; 2) pre-test and post-test in each cycle to give an overview of the effect of action on students' understanding; and 3) an evaluative questionnaire for students to find out whether paragraphs and short conversations help students understand English grammar better. The findings show that the use of paragraphs and short conversations in learning grammar can improve understanding of English grammar, but has not been able to overcome the problem of low understanding of grammar. Comparison of the average pre-cycle test score with the final test average score of each post-action cycle showed an increase of 9.9 points (from 56.5 to 66.4) in cycles 1 and 12.4 points (from 56.5 to 68.9 ). 68.9) in cycle 2.
ABSTRAKTata bahasa Inggris masih menjadi persoalan siswa kelas X Bahasa dan Budaya SMA Kolese De Britto tahun ajaran 2021-2022. Untuk topik modal verb should, 21 dari 27 siswa (78%) tidak memenuhi nilai KKM 75. Setelah topik tersebut diajarkan ulang dan diadakan tagihan remedial, 11 siswa (41%) tidak mencapai angka KKM. Faktor utama rendahnya pemahaman tata bahasa Inggris adalah pembelajaran tata bahasa yang tidak kontekstual. Pengumpulan data dilakukan dengan tiga instrumen: 1) lembar observasi diri berbentuk daftar periksa untuk memastikan seluruh langkah pembelajaran dilakukan dengan baik; 2) tes awal dan tes akhir dalam setiap siklus untuk memberi gambaran tentang pengaruh tindakan terhadap pemahaman siswa; dan 3) kuesioner evaluatif untuk siswa untuk mengetahui apakah paragraf dan percakapan pendek membantu siswa memahami tata bahasa Inggris dengan lebih baik. Temuan menunjukkan bahwa penggunaan paragraf dan percakapan pendek dalam pembelajaran tata bahasa dapat meningkatkan pemahaman tata bahasa Inggris, tetapi belum dapat mengatasi masalah rendahnya pemahaman tata bahasa. Perbandingan skor rerata tes prasiklus dengan skor rerata tes akhir masing-masing siklus pasca tindakan menunjukkan kenaikan sebesar 9,9 poin (dari 56,5 menjadi 66,4) dalam siklus 1 dan 12, 4 poin (dari 56,5 menjadi 68,9) dalam siklus 2. Perbandingan skor rerata tes awal dengan skor rerata tes akhir masing-masing siklus menunjukkan kenaikan sebesar 12,9 poin (dari 53,5 menjadi 66,4) dalam siklus 1 dan 28,3 poin (dari 40,6 menjadi 68,9) dalam siklus 2.
PENGARUH PENERAPAN MODEL PEMBELAJARAN PROBLEM BASED LEARNING (PBL) TERHADAP HASIL BELAJAR FISIKA
Authors: SUINDHIA I WAYAN
Published: May 2023

Learning outcomes are the output of the teaching and learning process. One of the problems in learning in schools is the low learning outcomes of students. This can be known from the initial data of students' daily test scores that are still under the Minimum Completeness Creteria (KKM). Many factors affect learning outcomes, one of which is the learning model. The Problem Based Learning Model is a cooperative learning model that requires students to be active and motivate students to support and help each other in mastering the subject matter studied. The learning model is one of the factors that affect student learning outcomes . This best practice research aims to determine the effect of the application of the Problem Based Learning model on the physics learning outcomes of grade XII MIPA1 students of SMA Negeri 1 Petang, semester 1 of the 2022/2023 academic year. In this study, it was obtained that there was an influence on student learning outcomes after applying the Problem Based Learning model. Byapplying Problem Based Learning, physics learning outcomes increased from an average completeness of 72.5% to 85.3%.
ABSTRAKHasil belajar merupakan merupakan output dari proses belajar mengajar. Salah satu masalah dalam pembelajaran di sekolah adalah rendahnya hasil belajar siswa. Hal ini dapat diketahui dari data awal nilai ulangan harian siswa yang masih berada di bawah Kreteria Ketuntasan Minimal (KKM). Banyak faktor-faktor yang mempengaruhi hasil belajar salah satunya adalah model pembelajaran. Model Pembelajaran Problem Based Learning (PBL) merupakan model pembelajaran kooperatif yang menuntut siswa untuk aktif dan memotivasi siswa supaya dapat saling mendukung dan membantu satu sama lain dalam menguasi materi pelajaran yang dipelajari. Model pembelajaran adalah salah satu faktor yang mempengaruhi hasil belajar siswa. Penelitian best praktice ini bertujuan untuk mengetahui pengaruh penerapan model pembelajaran Problem Based Learning (PBL) terhadap hasil belajar fisika siswa kelas XII MIPA1 SMA Negeri 1 Petang, semester 1 tahun pelajaran 2022/2023. Dalam penelitian ini diperoleh bahwa ada pengaruh hasil belajar siswa stelah menerapkan model pembelajaran Problem Based Learning. Dengan menerapkan pembelajaran Problem Based Learning hasil belajar fisika meningkat dari rata-rata ketuntasan 72,5% menjadi 85,3%.
ANALISIS PEMAHAMAN KONSEP SISWA PADA TOPIK FLUIDA STATIS
Authors: KURNIAWAN RAMADHAN VERY
Published: May 2023

This research aims to identify students' understanding of physics concepts in the topic of static fluids and analyze which subtopics often pose a problem. This study is a quantitative descriptive research using an instrument of 8 three-tier questions on Hydrostatic Pressure, Pascal's Law, and Archimedes' Principle. The research subjects consisted of 35 students from grade XI of St. Albertus Malang Catholic High School who have studied static fluids. The results of the study showed that students experienced misconceptions in all tested subtopics of static fluids, namely Hydrostatic Pressure (16.19%), Pascal's Law (39.04%), and Archimedes' Principle (45.71%).
ABSTRAKPenelitian ini bertujuan untuk mengidentifikasi pemahaman konsep fisika siswa pada topik fluida statis serta menganalisis sub topik apa saja yang seringkali menjadi permasalahan. Penelitian ini merupakan penelitian deskriptif kuantitatif dengan menggunakan intrumen 8 soal three tier tentang Tekanan Hidrostatis, Hukum Pascal, dan Hukum Archimedes. Subjek penelitian terdiri dari 35 siswa kelas XI SMA Katolik St Albertus Malang yang telah menempuh topik fluida statis. Hasil penelitian menunjukkan bahwa siswa mengalami miskonsepsi pada semua sub topik fluida statis yang diujikan yaitu Tekanan Hidrostatis (16,19%), Hukum Pascal (39, 04%), dan Hukum Archimedes (45,71%).
Characteristics of interannual variability in space-based XCO2 global observations
Authors: Guan Yifan , Keppel-Aleks Gretchen , Doney Scott C. , Petri Christof , Pollard Dave , Wunch Debra , Hase Frank , Ohyama Hirofumi , Morino Isamu , Notholt Justus , Shiomi Kei , Strong Kim , Kivi Rigel , Buschmann Matthias , Deutscher Nicholas , Wennberg Paul , Sussmann Ralf , Velazco Voltaire A. , Té Yao
Published: May 2023

Abstract. Atmospheric carbon dioxide (CO2) accounts for the largest radiative forcing among anthropogenic greenhouse gases. There is,
therefore, a pressing need to understand the rate at which
CO2 accumulates in the atmosphere, including the interannual variations
(IAVs) in this rate. IAV in the CO2 growth rate is a small signal relative to the long-term trend and the mean annual cycle of atmospheric
CO2, and IAV is tied to climatic variations that may provide insights
into long-term carbon–climate feedbacks. Observations from the Orbiting Carbon Observatory-2 (OCO-2) mission offer a new opportunity to refine our
understanding of atmospheric CO2 IAV since the satellite can measure
over remote terrestrial regions and the open ocean, where traditional in situ CO2 monitoring is difficult, providing better spatial coverage compared
to ground-based monitoring techniques. In this study, we analyze the IAV of column-averaged dry-air CO2 mole fraction (XCO2) from OCO-2 between September 2014 and June 2021. The amplitude of the IAV, which is calculated as the standard deviation of the time series, is up to 1.2 ppm over the continents and around 0.4 ppm over the open ocean. Across all
latitudes, the OCO-2-detected XCO2 IAV shows a clear relationship with El Niño–Southern Oscillation (ENSO)-driven variations that originate in the tropics and are transported poleward. Similar, but smoother, zonal patterns of OCO-2 XCO2 IAV
time series compared to ground-based in situ observations and with column observations from the Total Carbon Column Observing Network (TCCON) and the
Greenhouse Gases Observing Satellite (GOSAT) show that OCO-2 observations
can be used reliably to estimate IAV. Furthermore, the extensive spatial
coverage of the OCO-2 satellite data leads to smoother IAV time series than those from other datasets, suggesting that OCO-2 provides new capabilities
for revealing small IAV signals despite sources of noise and error that are
inherent to remote-sensing datasets.
Aerosol first indirect effect of African smoke at the cloud base of marine cumulus clouds over Ascension Island, southern Atlantic Ocean
Authors: de Graaf Martin , Sarna Karolina , Brown Jessica , Tenner Elma V. , Schenkels Manon , Donovan David P.
Published: May 2023

Abstract. The interactions between aerosols and clouds are among the least
understood climatic processes and were studied over Ascension Island.
A ground-based UV polarization lidar was deployed on Ascension Island, which
is located in the stratocumulus-to-cumulus transition zone of the
southeastern Atlantic Ocean, to infer cloud droplet sizes and droplet
number density near the cloud base of marine boundary layer cumulus
clouds. The aerosol–cloud interaction (ACI) due to the presence of
smoke from the African continent was determined during the monsoonal
dry season. In September 2016, a cloud droplet number density ACIN
of 0.3 ± 0.21 and a cloud effective radius
ACIr of 0.18 ± 0.06 were found, due to the presence of smoke in
and under the clouds. Smaller droplets near the cloud base makes them
more susceptible to evaporation, and smoke in the marine boundary layer
over the southeastern Atlantic Ocean will likely accelerate the
stratocumulus-to-cumulus transition. The lidar retrievals were tested
against more traditional radar–radiometer measurements and shown to be
robust and at least as accurate as the lidar–radiometer measurements.
The lidar estimates of the cloud effective radius are consistent with
previous studies of cloud base droplet sizes. The lidar has the large
advantage of retrieving both cloud and aerosol properties using a
single instrument.
Photo-induced shrinking of aqueous glycine aerosol droplets
Authors: Ishizuka Shinnosuke , Reich Oliver , David Grégory , Signorell Ruth
Published: May 2023

Abstract. Due to their small size, micrometer- and submicrometer-sized
solution droplets can respond differently to physical and chemical processes
compared with extended bulk material. Using optically trapped micrometer-sized aqueous glycine droplets, we demonstrate a photo-induced degradation
of glycine upon irradiation with visible light, even though molecular
glycine does not absorb light in the near-UV–vis range to any significant
extent. This reaction is observed as photo-induced shrinking of the droplet,
which we characterize by analyzing the elastic light scattering and the
Raman spectrum of the droplet over the course of the reaction. We find the
volume to shrink with a constant rate over the major part of the shrinking
process. This indicates the presence of a rate limiting photo-catalyst,
which we attribute to mesoscopic glycine clusters in the droplet solution.
Our findings relate to previous reports about enhanced absorption and
fluorescence rates of amino acid solutions. However, to the best of our
knowledge, this is the first experimental evidence of a photochemical
pathway facilitated by mesoscopic clusters. Light interaction with such
mesoscopic photoactive molecular aggregates might be more important for
aerosol photochemistry than previously anticipated.
A novel probabilistic source apportionment approach: Bayesian Auto-correlated Matrix Factorization
Authors: Rusanen Anton , Björklund Anton , Manousakas Manousos , Jiang Jianhui , Kulmala Markku T. , Puolamäki Kai , Daellenbach Kaspar R.
Published: May 2023

Abstract. The concentrations and sources of particulate matter in the atmosphere are temporally auto-correlated. Here, we present a Bayesian matrix factorization model (BAMF) that considers the temporal auto-correlation of the components (sources) and provides a direct error estimation. The performance of BAMF is compared to positive matrix factorization (PMF) using synthetic Time-of-Flight Aerosol Chemical Speciation Monitor data, representing different urban environments from typical European towns to megacities. We find that BAMF resolves sources better than PMF on all datasets with auto-correlated components, but highly cross-correlated components continue to be challenging. However, we demonstrate that adding even partial prior information about the chemical composition of the components to BAMF improves the factorization. Overall, BAMF-type models are promising tools for source apportionment and merit further research.
Assessing the ability of a new seamless short-range ensemble rainfall product to anticipate flash floods in the French Mediterranean area
Authors: Godet Juliette , Payrastre Olivier , Javelle Pierre , Bouttier François
Published: May 2023

Abstract. Flash floods have dramatic economic and social consequences, and efficient adaptation policies are required to reduce their impacts, especially in a context of global change. Developing more efficient flash flood forecasting systems can largely contribute to these adaptation requirements. The aim of this study was to assess the ability of a new seamless short range (0–6 h) ensemble quantitative precipitation forecast (QPF) product, called PIAF-EPS and recently developed by Météo-France, to predict flash floods when used as input of an operational hydrological forecasting chain. For this purpose, eight flash flood events that occurred in the French Mediterranean region between 2019 and 2021 were reanalysed, using a similar hydrological modeling chain to the one implemented in the French “Vigicrues-Flash” operational flash flood monitoring system. The hydrological forecasts obtained from PIAF-EPS were compared to the forecasts obtained with different deterministic QPFs from which PIAF-EPS is directly derived (i.e. the AROME-NWC numerical weather prediction model, and the deterministic PIAF product). The verification method applied in this work uses scores calculated on contingency tables, and combines the forecasts issued on each 1 km2 pixel of the territory. This offers a detailed view of the forecast performances, covering the whole river network and including the small ungauged rivers. The results confirm the added value of the ensemble PIAF-EPS approach for flash flood forecasting, in comparison to the different deterministic scenarios considered.
The rate of information transfer as a measure of ocean–atmosphere interactions
Authors: Docquier David , Vannitsem Stéphane , Bellucci Alessio
Published: May 2023

Abstract. Exchanges of mass, momentum and energy between the ocean and atmosphere are of large importance in regulating the climate system. Here, we apply for the first time a relatively novel approach, the rate of information transfer, to quantify interactions between the ocean surface and the lower atmosphere over the period 1988–2017 at a monthly timescale. More specifically, we investigate dynamical dependencies between sea surface temperature (SST), SST tendency and turbulent heat flux in satellite observations. We find a strong two-way influence between SST and/or SST tendency and turbulent heat flux in many regions of the world, with the largest values in the eastern tropical Pacific and Atlantic oceans, as well as in western boundary currents. The total number of regions with a significant influence by turbulent heat flux on SST and on SST tendency is reduced when considering the three variables (this case should be privileged, as it provides additional sources of information), while it remains large for the information transfer from SST and SST tendency to turbulent heat flux, suggesting an overall stronger ocean influence compared to the atmosphere. We also find a relatively strong influence by turbulent heat flux taken 1 month before on SST. Additionally, an increase in the magnitude of the rate of information transfer and in the number of regions with significant influence is observed when looking at interannual and decadal timescales compared to monthly timescales.
Multi-centennial evolution of the climate response and deep ocean heat uptake in a set of abrupt stabilization scenarios with EC-Earth3
Authors: Fabiano Federico , Davini Paolo , Meccia Virna , Zappa Giuseppe , Bellucci Alessio , Lembo Valerio , Bellomo Katinka , Corti Susanna
Published: May 2023

Abstract. Understanding long-term committed climate change due to anthropogenic forcing is key to inform climate policies, yet these timescales are still under-explored. We present here a set of 1000-year long abrupt stabilization simulations performed with EC-Earth3. Each simulation follows a sudden stabilization of the external forcing at the level specified by CMIP6 for historical (1990) or SSP5-8.5 scenario (2025, 2050, 2065, 2080, 2100) conditions, with a final temperature increase ranging between 1.4 and 9.6 K with respect to the pre-industrial baseline. Remarkably, the simulation stabilized at a level of greenhouse gases (GHGs) close to present-day (2025) well exceeds in the long term the Paris agreement goals of 1.5 and 2 degrees warming above pre-industrial, and only the 1990 simulation leads to a stabilized climate below 1.5 degrees warming. We first focus on the evolution of the climate response at multi-centennial timescales and its dependence on the level of forcing. Surface warming patterns evolve during the course of the simulations, with the most striking feature being a drastic acceleration of the warming in the Southern Ocean. The patterns of precipitation change also evolve during the stabilization runs: the drying trends found in the sub-tropical oceans and in Mediterranean-like hotspots in the SSP5-8.5 scenario tend to reduce, or even to reverse. We finally focus on the rate of heat storage in the global ocean, which is the main driver of the climate response at multi-centennial timescales. We find that the rate of warming of the deep ocean is almost independent from the amplitude of the forcing, so that most of the additional heat remains in the upper layers at high forcing. We hypothesize that this is due – at least partly – to a decreased ventilation of the deep ocean, caused by changes in the meridional overturning circulation (MOC). The results highlight the importance of studying multi-centennial timescales of climate change to better understand the response of the deep ocean, which will play a crucial role in determining the final state of the climate system once GHGs concentrations are stabilized.
FLOW EVOLUTION MONITORING FOR AIRCRAFT ICING STUDY
Authors: Knyaz V. A. , Kniaz V. V. , Ippolitov E. V. , Novikov M. M. , Zheltov S. Y.
Published: May 2023

Abstract. Monitoring the evolution of the aerodynamic flow in potentially dangerous conditions is very important to ensure flight safety. Due to the impossibility of experimental study of critical flight conditions in real flights, methods of scaled modeling of flow processes have been developed and are widely used in aerodynamics and hydrodynamics. Aircraft icing is one of the most important processes that pose a threat to flight safety. The presented study is aimed at developing techniques for monitoring of process of aircraft icing and its influence on flow behaviour, that can be used in controlled conditions of aerodynamic/hydrodynamic tube. While available technical means for aerodynamic study does not include the wind tunnel for registration of flow simultaneously with icing process, the proposed framework includes as icing process 3D registration so further modelling this process in a hydrodynamic tube for flow monitoring. The proposed technique includes three phases, that allow to perform comprehensive monitoring of the whole process beginning with 3D registration of ice accretion development and completing with accurate 3D flow evolution monitoring corresponding to icing process.
CURVELET BASED U-NET FRAMEWORK FOR BUILDING FOOTPRINT IDENTIFICATION
Authors: Ansari R. A. , Thomas W.
Published: May 2023

Abstract. This paper proposes a multiresolution based U-net composite architecture for segmentation of remotely sensed images for building footprint identification. The features derived from curvelet decompositions at different scales are augmented to capture curvilinear discontinuities of the building footprint. This increases the contextual overview of the network as the same data on multiple scales is available for feature extraction and learning. This work further analyses the effects of different multiresolution methods on wavelets and curvelets for decomposition on segmentation performance. The performance is evaluated in terms of precision, recall, F-score, mean intersection over union, overall accuracy, local and global consistency errors. It is found that the proposed method has better class-discriminating power as compared to existing methods and has an overall classification accuracy of 92.4–95.22%. On comparison with the U-Net model performance, it is observed that the proposed network can identify the building areas with higher accuracy and mean intersection over union, the best performance being with curvelet basis of multiresolution analysis.
Time-domain proton-detected local-field NMR for molecular structure determination in complex lipid membranes
Authors: Wurl Anika , Saalwächter Kay , Mendes Ferreira Tiago
Published: May 2023

Abstract. Proton-detected local-field (PDLF) NMR spectroscopy, using magic-angle spinning and dipolar recoupling, is presently the most powerful experimental technique for obtaining atomistic structural information from small molecules undergoing anisotropic motion. Common examples include peptides, drugs, or lipids in model membranes and molecules that form liquid crystals. The measurements on complex systems are however compromised by the larger number of transients required. Retaining sufficient spectral quality in the direct dimension requires that the indirect time-domain modulation becomes too short for yielding dipolar splittings in the frequency domain. In such cases, the dipolar couplings can be obtained by fitting the experimental data; however ideal models often fail to fit PDLF data properly due to effects of radiofrequency field (RF) spatial inhomogeneity. Here, we demonstrate that by accounting for RF spatial inhomogeneity in the modeling of R-symmetry-based PDLF NMR experiments, the fitting accuracy is improved, facilitating the analysis of the experimental data. In comparison to the analysis of dipolar splittings without any fitting procedure, the accurate modeling of PDLF measurements makes possible three important improvements: the use of shorter experiments that enable the investigation of samples with a higher level of complexity, the measurement of C–H bond order parameters with smaller magnitudes |SCH| and of smaller variations of |SCH| caused by perturbations of the system, and the determination of |SCH| values with small differences from distinct sites having the same chemical shift. The increase in fitting accuracy is demonstrated by comparison with 2H NMR quadrupolar echo experiments on mixtures of deuterated and non-deuterated dimyristoylphosphatidylcholine (DMPC) and with 1-palmitoyl-2-oleoyl-sn-glycero-3-phosphoethanolamine (POPE) membranes. Accurate modeling of PDLF NMR experiments is highly useful for investigating complex membrane systems. This is exemplified by application of the proposed fitting procedure for the characterization of membranes composed of a brain lipid extract with many distinct lipid types.