bluuebunny/crossref_metadata_2025 huggingface dataset:
Assessing Experiences in Diving Recreation and Their Relation to Proenvironmental Behavior and Attitude: A Study of Divers in South African Kelp Forests
Authors: Lucrezi Serena , du Plessis Michael Juan
Published: March 2022

Recreational activities in marine environments have many benefits, such as physical and mental wellbeing, contact with nature, and nature connectedness. These benefits can translate into other positive outcomes, including proenvironmental behavior and attitude and ocean stewardship.
Cold-water recreation including diving (scuba and free diving) is increasingly popular, yet its phenomenology is understudied. The available research, however, shows that there is great potential for cold-water diving to contribute to those benefits that can result in a "marine mindset." This
qualitative study aimed to add to the body of knowledge regarding cold-water recreation, by investigating through a blanket assessment the motivations and experiences of independent divers in the kelp forests of Cape Town, South Africa, and their putative influence on proenvironmental attitude
and behavior. One hundred divers were interviewed telephonically in 2020 and 2021, and data were extracted and analyzed using both thematic and statistical analysis. Divers were motivated by experiences including hedonism; sensorial; spirituality, reverence, and gratitude; learning; connection
with nature; well-being; challenge; escapism; flow; and socialization and communitas. Specific motivations and experiences resulted in proenvironmental behaviors and attitudes. The results of this study confirmed the value of kelp diving as an activity with numerous benefits to people and
marine environments and were used to delineate recommendations for marketing and management that can foster the growth of coldwater diving as a sustainable form of marine-based recreation.
Pemberdayaan Masyarakat dalam Pengendalian Pandemi Covid-19 Melalui Whatsapp Di Kota Palangka Raya
Authors: Heru Hidayat  , Saputera  , Kusnida Indrajaya  , Saiffullah Darlan  , Wahidin  , Suparman
Published: March 2022

Pendidikan luar sekolah sebagai bagian dari pemberdayaan masyarakat merupakan upaya untuk memenuhi kebutuhan dan pengentasan masalah yang dialami oleh masyarakat. Kondisi pandemi Covid-19 saat ini, merupakan permasalahan yang melanda masyarakat dan berpengaruh dalam seluruh aspek kehidupan masyarakat baik pendidikan, kesehatan dan ekonomi. Begitu pula pemberdayaan masyarakat dibidang kesehatan menjadi salah satu isu penting yang harus segera diselesaikan. Survei pendahuluan kami menunjukkan 90% responden mengatakan mereka meemrlukan informasi tentang pencegahan Covid-19 dari Pemerintah khususnya Satgas Covid-19 melalui WhatsApp. Penelitian ini bertujuan memberdayakan masyarakat dalam pengendalian Covid-19 melalui WhatsApp di Kota Palangka Raya berdasarkan pengetahuan, sikap, dan tindakan mereka. Penelitian ini melibatkan 196 orang yang mendapat perlakuan dan memberikan umpat balik  melalui media WhatsApp. Hasil penelitian menunjukkan pada variabel pengetahuan, sikap dan tindakan memiliki nilai signifikansi sebesar 0,000 (p < 0,05). Dengan demikian disimpulkan bahwa terdapat perbedaan pengetahuan, sikap dan tindakan yang bermakna antara sebelum edukasi dan sesudah edukasi terkait pengendalian Covid-19 melalui WhatsApp di Kota Palangka Raya.
Pengembangan LKS Blended Learning Berbasis Web Pada Materi Pencemaran Lingkungan Untuk Meningkatkan Keterampilan Proses Sains
Authors: Abriyanto  , Liswara Neneng  , Yohanes Edy Gunawan
Published: March 2022

Penelitian ini dilatarbelakangi oleh adanya guru yang masih melakukan proses pembelajaran secara tekstual dengan menggunakan LKS yang masih memiliki keterbatasan. Tujuan penelitian ini adalah untuk mengetahui peningkatan keterampilan proses sains siswa menggunakan perangkat pembelajaran LKS Blended learning berbasis web materi pencemaran lingkungan. Jenis penelitian ini adalah penelitian Research and Development (R&D). Prosedur penelitian mengadaptasi model pengembangan ADDIE. Penelitian dilaksanakan pada semester genap tahun ajaran 2020/2021 di SMPN 3 Menthobi Raya Kabupaten Lamandau pada siswa kelas VII. Peningkatan keterampilan proses sains siswa siswa diukur dengan tes objektif dan dianalisis dengan N-gain. Berdasarkan hasil penelitian dapat disimpulkan bahwa N-gain keterampilan proses sains siswa mencapai rata-rata 0,72 uji skala kecil dan 0,84 uji skala besar. LKS blended learning berbasis web pada materi pencemaran lingkungan dapat meningkatkan keterampilan proses sains siswa.
The Role of Glutathione as a Bleaching Agent in Whitening Skin: A Review
Authors: Abdul- Nabi Zainab , Mohammed-Jawad Noor
Published: March 2022

Objective: To review and compare the efficacy of glutathione formulations as skin-whitening agents in adults participating in several clinical studies.
Methods: Using a MEDLINE search with the time frame specified up to March 2020 , seven clinical studies involving GSH use for lightening the skin were recognized and assessed for significance and validity.
Results: Four controlled clinical trials (GSH capsules: 60 healthy volunteers; 250 mg oral GSH capsules:60; 2% glutathione lotion: 30s healthy volunteers; GSH as wash:74 healthy volunteers) and a case series(GSH lozenges: 30 patients) showed a significant reduction in melanin index. A case series (GSH soap: 15 patients) revealed a skin-lightening effect based on photography. Only one placebo-controlled study on IV GSH (1200 mg) in 60 healthy volunteers demonstrated a poor effect of glutathione as a whitening agent.
Conclusion: The literature search revealed that glutathione is not useful enough as a skin-whitening agent, as it is only effective on some parts of the skin and did not present any long-lasting effect. Although the safety profile of topical and oral glutathione seemed to be good, long-term research studies employing better study design are required in order to evaluate the efficacy of this antioxidant.
A Novel Type-2 Fuzzy Directed Hybrid Post-Filtering Technique for Efficient JPEG Image Artifact Reduction
Authors: Thakur Vikrant Singh , Thakur Kavita , Gupta Shubhrata
Published: March 2022

Image and video compression becomes very popular and intense field in recent decades, due to their fast and quality communication demand. To cope up with the high speed communication demand of image and videos, over the communication channel, higher compression (ie. low bit rate compression) is now preferred at the cost of quality degradation. Currently JPEG and JPEG2000 are the most popularly used codec’s for achieving quality image compression. Practically, on the low bit rate compression, it has been observed that, the JPEG standard compressed images suffer from multifarious visual distortions. To address this problem effectively, this paper proposed an innovative type-2 fuzzy directed hybrid post filtering technique, which is framed to suppress the artifacts generated in JPEG compressed images at low bit rate compression. The proposed technique addresses all three types of JPEG compressed image artifacts: blocking, edges blurring, and aliasing. Furthermore the proposed technique is structured with two stages, to enhance the quality of JPEG compressed images. The first stage, removes blocking artifacts using boundary smoothing and guided filtering techniques. The second stage reduces blurring and aliasing around the edges through type-2 fuzzy directed local edge regeneration. To prove higher efficiency of proposed work, a complete comparative performance evaluation with other existing JPEG artifact removal techniques, has also presented. This extensive performance analysis includes visual quality assessment of post-filtered images along with subjective quality assessment on the basis of, Peak Signal to Noise Ratio (PSNR) and Mean Square Error (MSE). Performance evaluation illustrates that the, proposed approach is efficient, provides PSNR improvement of approximately 1 dB along with higher reduction in MSE values as compared to state of the art algorithms for all the bit-rate compressions.
Linear Mixed Model Approach to Protein Significance Analysis
Authors: Jun Jongsoo , Park Taesung
Published: March 2022

Discovering protein biomarkers is one of the important issues in biomedical researches. The enzymelinked immunosorbent assay (ELISA) is one of the traditional techniques for protein quantitation. Recently, the multiple reaction monitoring (MRM) mass spectrometry has been proposed as a new method for protein quantification and has been popular as an alternative to ELISA. However, not many analysis methods are available yet to analyse MRM data. Linear mixed models (LMMs) are effective in analysing MRM data. MSstats is one of the most widely used tools for MRM data analysis which is based on the LMMs. MSstats is well implemented on Skyline program and R programming language. However, LMMs often provide various significance results depending on model specification. Thus, sometimes it would be difficult to specify a right LMM for the analysis of MRM data. In this paper, we systematically investigated the effect of model specification on significance of proteins through simulation studies. Our results provide a practical guideline of using LMMs for MRM data analysis.
Studies Regarding the Modeling of a Wind Turbine with Energy Storage
Authors: Cristinel Girdu Constantin
Published: March 2022

This paper presents the modeling in Matlab-Simulink of a stand-alone wind turbine system with energy storage dedicated for small power wind turbines of 3kW with a variable speed permanent magnet synchronous generator (PMSG), diode rectifier bridge, buck-boost converter, bidirectional charge controller, transformer, inverter, ac loads and energy storage devices. Are presented the general system configuration, the Simulink block diagram and the main simulated characteristics resulting from the dynamic performances during the wind speed variation.
Courting Prom Night Voters
Authors: Lockwood Spencer Ryan
Published: March 2022

A creature of state law, voter registration is a point of national contention and a subject that frequents partisan debate. Federal legislation—meant to unsew a patchwork quilt of discriminatory practices against voters—complicated the voter registration process. States have changed their voter registration laws in the wake of Supreme Court opinions and prolonged litigation. But an opportunity endures for states to take further accountability for their younger voting-age populations without more federal intervention. By amending their election codes to require that high school graduates choose whether to register to vote, states can act as legislative laboratories and court their prom night voters to guarantee the fundamental right to vote.
IMPACT OF KNOWLEDGE PRACTICES ON INNOVATION: THE ROLE OF EMPLOYEES’ INTENTION TO STAY AND RECOGNITION
Authors: Nida Nida Kamal , Hina Hina Samdani , Awais Muhammad Awais Mehmood , Qaiser Qaiser Rashid Janjua
Published: March 2022

ABSTRACT

 

Purpose: Building upon a human-centered approach, knowledge management considers organizations to be complex systems that spring from the unique organizational contexts in which they are developed. The aim of the present study was to empirically investigate how knowledge practices impact innovation by inquiring into the employees’ intention to stay in the organization and the role of employee recognition.
El castigo como institución social. Una aproximación de la literatura a partir del estudio del castigo en los delitos sexuales en Colombia
Authors: Macana Gutiérrez Nataly
Published: March 2022

La violencia sexual se ha convertido en los últimos 40 años en un fenómeno socialrelevante que ha moldeado el campo del control del delito en Colombia desde los tres nivelesde criminalización. La forma como socialmente se ha respondido a esta violenciacorresponde al denominado giro punitivo que se ha vivido en el sur global. La respuestaestándar a este tipo de conductas es el populismo punitivo como categoría analítica. Sinembargo, desde la sociología del castigo y comprendiendo el castigo como una instituciónsocial compleja se puede entender este fenómeno en sus dimensiones culturales, políticas,sociales e históricas, entre otras. En virtud de ello, el presente artículo presenta una revisiónde la literatura alrededor de los postulados teóricos de la sociología del castigo y, la formacomo el castigo se ha configurado alrededor de los delitos sexuales en Colombia. Lametodología empleada fue cualitativa y se sustento en la revisión de fuentes primarias. Apartir de esta revisión de literatura se pudo establecer como el castigo y los mecanismos decontrol penal varían dependiendo de los cambios en la concepción moral, cultural y social delas diversas conductas y del castigo mismo.
Функция уязвимости человека с учетом продолжительности действия поражающего фактора
Authors: Акатьев Владимир Андреевич , Зенцов Игорь Иванович
Published: March 2022

В статье приведены результаты исследований по обоснованию функций уязвимости человека в легкой одежде и без средств индивидуальной защиты, подвергшегося воздействию тепловых потоков и (или) температур воздуха. В качестве опытных данных приняты опубликованные параметры тепловых воздействий, приводящие к поражениям незащищенного человека при различных экспозициях. Имеющиеся методы оценки уязвимости человека от воздействия тепловых полей при их использовании дают большие расхождения при их сравнении с опытными данными, особенно при начальных и конечных значениях временных экспозиций, а также при низких и высоких значениях поражающего фактора. Так, при низких значениях тепловых потоков длительность их воздействия на степень поражения человека слабо влияет и, наоборот, при высоких значениях плотности теплового потока влияние длительности воздействия многократно повышается. В этой связи проблема обоснования функций тепловой (температурной) уязвимости человека при широком диапазоне интенсивностей поражающих факторов и временных экспозиций является актуальной.
В работе получены функции уязвимости человека в условиях воздействия на человека тепловых потоков и температуры газовой среды, окружающей человека, позволяющие оценить поражение человека без защитных средств с вероятностью 0%, 50% и 100%. Проверка результатов расчетов с использованием полученных математических зависимостью показала высокую степень сходимости с результатами известных экспериментальных данных.
Bakım Verenler Arasında “İyi Ölüm” Kavramı: Sistematik Derleme
Authors: ZORBA BAHÇELİ Pınar , ÇINAR Derya , AKÇA Nazan
Published: March 2022

Bu sistematik derlemede, bakım verenlerde “iyi ölüm” kavramını değerlendirmek için 2015-2020 yılları arasında yayınlanmış olan araştırmaların incelenmesi amaçlanmıştır. Tam metin araştırmalar PubMed ve Medline veri tabanlarında, “good death, cancer, palliative care”; ULAKBİM Türk Tıp Dizini ve Google Akademikte “iyi ölüm, kanser, palyatif bakım,” anahtar kelimeleri ile taranmıştır. Araştırmaların orijinal araştırma makalesi olması ve “iyi ölüm” kavramının makale başlığında yer alması koşulları çalışmaya dahil edilme ölçütleri olarak belirlenmiştir. Dahil edilme ölçütlerine uyan 19 araştırmadan 12’si çalışma kapsamına alınmıştır. İncelenen araştırmaların örneklemini formal ve informal bakım verenler oluşturmuştur. Araştırmaların sırasıyla onkoloji, palyatif bakım ve yoğun bakım ünitelerinde yapıldığı tespit edilmiştir. Yapılan çalışmalarda formal bakım verenler; iyi ölüm kavramını daha çok “ağrısız ölüm, "sevdiklerinin yanında ölüm ve huzurlu ölüm" olarak tanımlarken, informal bakım verenler ise; "bakım yükü oluşturmaması, ölüm sürecinin konuşulması ve ağrısız ölüm" olarak ifade etmiştir. Ayrıca formal ve informal bakım verenlerin iyi ölüm algılarının kültürel ve etnik özelliklerden dolayı değişkenlik gösterdiği sonucuna varılmıştır. Bu sistematik derleme, bu alanda yapılan araştırmaların sayısal sınırlılığını, bakım verenler arasında iyi ölüm kavramına ilişkin görüş ve tutum farklılıklarını ortaya koymuştur. Bu doğrultuda, ölmekte olan bireye bakım verenlerin iyi ölüm algılarının belirlenmesi ve bunu etkileyen faktörlerin tanımlanması, iyi ölüm algılarına ilişkin kültürel özelliklerini karşılaştıran farklı kültürlerde metodolojik çalışmaların yapılması önerilmektedir.
Le progressisme et son projet de modernisation politique et administrative en Équateur (1883-1895)
Authors: Medina Alexis
Published: March 2022

L’article cherche à déterminer dans quelle mesure le progressisme, courant politique modéré au pouvoir en Équateur de 1883 à 1895, a réussi à bouleverser le bipartisme marqué par l’opposition entre libéralisme et conservatisme. Les progressistes sont porteurs d’un projet modernisateur, qui se traduit par une série de réformes administratives et économiques, mais qui est combattu par les conservateurs et les libéraux, malgré les efforts des progressistes pour dépasser les clivages politiques.
La présidence progressiste, de Roosevelt à Wilson (1901-1920)
Authors: Delahaye Claire
Published: March 2022

Cet article propose une analyse du progressisme étatsunien au prisme de l’historiographie sur les présidences Roosevelt, Taft et Wilson, afin d’interroger les principes et modalités en contexte de l’extension du pouvoir présidentiel. La transformation de l’exécutif, en tension entre définition constitutionnelle et pratique politique, interroge l’équilibre des pouvoirs et la possibilité pour la présidence d’être le moteur de réformes. Elle met tout particulièrement en exergue la centralité de la personnalité et des convictions de l’occupant de la Maison-Blanche.
L’expérience gouvernementale de Matteo Renzi. Un progressisme populiste
Authors: Lazar Marc
Published: March 2022

Matteo Renzi a connu une trajectoire politique météorite qui l’a amené à l’âge de 39 ans à devenir en février 2014 le plus jeune Président du Conseil de l’histoire italienne, une fonction qu’il a occupée jusqu’en décembre 2016, lorsqu’après un échec à un référendum institutionnel il a présenté sa démission. Ce communicant hors pair, décidé à bousculer le jeu politique et à promulguer une grande quantité de réformes s’est présenté comme un progressiste tout en incarnant un nouveau type d’homme politique en phase avec la démocratie du public, celui du populiste de gouvernement ou du centre. Ce texte s’attache à reconstituer le parcours biographique de Matteo Renzi, à analyser son programme et ses idées, à étudier la façon dont il a personnalisé son parti et à dresser un bilan de sa pratique et d’une partie de son action gouvernementale.
La contribution managériale à la résilience organisationnelle en période de crise sanitaire
Authors: Adam Barbara
Published: March 2022

Nos établissements hospitaliers évoluent dans un monde de plus en plus complexe et certaines situations inédites comme la crise covid-19 viennent profondément bouleverser nos organisations. Notre étude a pour objectif de comprendre comment celles-ci s’adaptent à l’actuelle situation sanitaire et de quelle façon les managers favorisent le processus de résilience organisationnelle. Ces derniers ont la responsabilité de donner du sens aux réorganisations afin d’assurer une cohérence de fonctionnement ainsi qu’une prise en charge la plus optimale possible des patients. La construction de sens est possible grâce à la clarté et à la maîtrise des informations transmises. Ainsi, l’accompagnement managérial par la communication et la présence sur le terrain jouent un rôle clé dans la mobilisation des équipes et dans le développement des capacités de résilience. Et celles-ci, lorsqu’elles se manifestent, permettent aux établissements d’absorber les changements.
Les facteurs d’adaptabilité des personnels de santé contributifs à la résilience hospitalière et les leviers managériaux mobilisés
Authors: Bousser Marylise
Published: March 2022

La pandémie de Covid-19 a mis à l’épreuve la résilience hospitalière mais également celle des personnels de santé. Cette note de recherche, s’intéresse aux facteurs déterminants de leur adaptabilité, mise en évidence et contributive à la gestion de la crise sanitaire. Parmi les caractéristiques des personnels de santé, elle étudie et démontre que leur qualification et leurs pratiques standardisées sont des éléments-clés de leur adaptabilité. Elle interroge également les éléments contextuels et managériaux qui concourent à l’engagement des personnels dans leur volonté de s’adapter, mettant en évidence l’intérêt d’une communication adaptée, d’un management de soutien et d’un management par le sens satisfaisant aux besoins de sécurité, d’avenir, de reconnaissance mais aussi d’apprentissage et d’évolution.
Approche systémique de l’évaluation des impacts d’une innovation : application à la mise en place d’un infirmier de liaison au Centre Hospitalier de Luxembourg
Authors: Annoot Alexandre , Rakotondranaivo Auguste
Published: March 2022

Pour faire face à l’évolution de l’organisation hospitalière et ses spécificités, le Centre Hospitalier de Luxembourg (CHL) décide d’innover en intégrant une nouvelle fonction, l’infirmier de Liaison. Après déploiement dans deux unités pilotes, l’établissement souhaite en évaluer les impacts, en vue de sa généralisation. Nous avons combiné des analyses qualitatives et quantitatives pour ce travail. L’approche systémique a permis d’identifier de façon la plus exhaustive possible les critères d’évaluation et leur regroupement. À partir des évaluations de 51 collaborateurs, il a été mis en évidence que le projet était un succès, par la perception d’impacts positifs pour les parties prenantes. Les recommandations portent sur les compétences du collaborateur au regard de la fonction, la distinction des spécialités médicales et la reconnaissance de la plus-value de l’innovation.
L’éthique du care comme stratégie des organisations : le cas des horaires atypiques dans les institutions hospitalières
Authors: Mandavy Bérengère
Published: March 2022

Cet article aborde les horaires atypiques au sein des institutions hospitalières comme facteur de vulnérabilité touchant les soignants en situation de parentalité. Il tente d’identifier les ressources managériales susceptibles d’y répondre par le biais de l’éthique du care . Notre propos est étayé par une enquête comparative réalisée auprès de 12 cadres et soignants. Les résultats soulignent le décalage existant entre travail prescrit et travail réel, entre les approches rationnelles et émotionnelles, et enfin, entre sphère familiale et sphère professionnelle. Nous avançons que pour pouvoir amorcer une approche éthique du care dans les organisations il faut avant tout une prise de conscience sur les conséquences d’une banalisation du travail réel. Celle-ci serait favorisée par les échanges et regards extérieurs. À l’issue de ce travail nous faisons plusieurs propositions issues en partie des personnes interrogées et montrons les limites rencontrées, notamment culturelles.
L’accès direct au dossier médical à l’AP-HP, vingt ans après la « loi Kouchner »
Authors: Nicolas Charline
Published: March 2022

Disposition phare de la loi du 4 mars 2002, l’accès direct du patient à son dossier médical sans l’intermédiaire du médecin participe, entre autres mesures, de la redéfinition des rôles traditionnellement attachés à la figure du médecin et à celle du patient voulue par le législateur. Les deux décennies de mise en œuvre de cette réforme au sein des 39 hôpitaux de l’Assistance publique-hôpitaux de Paris (AP-HP) en témoignent, tant dans les pratiques professionnelles et ce, quand bien même le dossier médical demeure un outil de pratique de la médecine, que dans l’organisation des hôpitaux du fait de la hausse quasi continue des demandes de communication de dossier depuis 2002. L’avènement du dossier patient numérisé tend à bouleverser la donne en rendant cet accès potentiellement automatique et immédiat. Ce faisant, il conduit à se réinterroger sur les nécessaires et nouvelles garanties à apporter au droit d’accès direct.
Impact of tele rehabilitation on clinical outcomes in patients recovering from COVID-19: a preliminary investigation
Authors: Arora K. , Chauhan D. , Gupta M. , Bhati P. , Anand P. , Hussain M.E.
Published: March 2022

Pulmonary rehabilitation has proven to be an effective therapeutic intervention for people with chronic respiratory disease. Considering the highly contagious nature of coronavirus disease (COVID-19), it becomes imperative to develop a method which can effectively improve clinical disease outcomes of these patients without any physical contact. The purpose of the study was to investigate the impact of tele rehabilitation on dyspnoea, endurance and quality-of-life in patients recovering from COVID 19. Thirty-two participants (age: 42.5±13.94, height: 165.8±10.06, weight: 68.5±9.63, body mass index: 25.0±3.61) who are recovering from COVID-19 were recruited as per the eligibility criteria. They were randomly allocated into two groups, Tele rehabilitation (n=16) and Control (n=16) by lottery method. All the selected participants were assessed at baseline for perceived dyspnoea, endurance and quality-of-life. Patients in the Tele rehabilitation group received 14 sessions of rehabilitation on alternate days online via google meet over a period of 28 days. Control group received usual care during the study period. Standard statistical tests were employed to test the study hypothesis. Results suggested a significant improvement in both dyspnoea (P=0.001) and endurance (P<0.001) in response to tele rehabilitation. Domains of quality-of-life such as physical role (P=0.02), vitality (P=0.04), emotional role (P=0.03), mental health (P=0.02) and physical components score (P=0.007) also showed significant improvement with tele rehabilitation in patients recovering from COVID-19. Findings of this preliminary study concludes that tele rehabilitation may be considered a treatment of choice in patients recovering from COVID-19 for improving outcomes of dyspnoea, endurance and quality-of-life.
Tuning the giant Magnetocaloric Effect and refrigerant capacity in Gd1–xYxCrO3 (0.0 ≤ x ≤ 0.9) perovskites nanoparticles
Authors: Al-Omari Imaddin A. ,   Department of Physics, PO Box 36, Sultan Qaboos University, PC 123 Muscat, Oman, Al-Mamari Muna D. , Sellmyer D.J. ,   Nebraska Center for Materials and Nanoscience and Department of Physics and Astronomy, University of Nebraska, Lincoln, Nebraska 68588, USA
Published: March 2022

Different compounds of rare-earth orthochromites Gd1–xYxCrO3 (where x is 0.0–0.9) powder nanoparticles, were synthesized by the auto-combustion method followed by annealing at 700 ℃. All the compounds showed single-phase and crystallized into a distorted orthorhombic structure with the space group (Pbnm). The average particle size for all the samples were in the range 53–110 nm. The detailed and systematic magnetic measurements and analysis showed that all the samples up to x = 0.9 have large magnetization and large values of the change in the magnetic entropy. The magnitude of the change in the magnetic entropy (at 4.5 K and for all the values of the change in the applied magnetic field between 1 and 9 T) is found to increase with increasing x reaching a maximum value at x = 0.3 then it decreases as we increase the yttrium concentration. The nanoparticle compounds with low yttrium concentrations showed a giant change in the magnetic entropy and a giant relative cooling power. Based on the slopes of Arrott plots curves the order parameter of the magnetic transition has been estimated and found to be second order. The giant change in the magnetic entropy and the relative cooling power were tuned in the rages (-45.6 to -8.7 J/kg·K at a change in the applied magnetic field of 9 T; and 136–746 J/kg), around the helium liquefaction temperature. The magnitude of the change in the magnetic entropy is significantly larger for large range of temperatures, up to the nitrogen liquefaction temperature. The giant change in the magnetic entropy and the giant relative cooling power at low temperatures (in the range about 4 to 20 K.) make these samples candidate materials for the low temperature magnetic refrigerant applications, based on the magnetocaloric effect.
Design of reasonable initialization weighted enhanced Karnik-Mendel algorithms for centroid type-reduction of interval type-2 fuzzy logic systems
Authors: Chen Yang , Yang Jiaxiu , Li Chenxi
Published: March 2022

Interval type-2 fuzzy logic systems (IT2 FLSs) already become an emerging technology in recent years. As the most popular type-reduction (TR) algorithms, Karnik-Mendel (KM) algorithms own the advantage of maintaining the uncertainties flow in systems. This paper analyzes the initialization for KM types of algorithms. Furthermore, the weighting approaches of them are also given by means of the Newton-Cotes quadrature formulas. Importantly, the reasonable initialization weighted enhanced Karnik-Mendel (RIWEKM) algorithms are provided to complete the centroid type-reduction of IT2 FLSs. Three computer simulation experiments illustrate that, the proposed RIWEKM algorithms own both smaller absolute errors and faster convergence speeds in contrast to the EKM and RIEKM algorithms.
Some qualitative properties of solutions to a nonlinear fractional differential equation involving two $ \Phi $-Caputo fractional derivatives
Authors: Derbazi Choukri , Al-Mdallal Qasem M. , Jarad Fahd , Baitiche Zidane
Published: March 2022

The momentous objective of this work is to discuss some qualitative properties of solutions such as the estimate of the solutions, the continuous dependence of the solutions on initial conditions and the existence and uniqueness of extremal solutions to a new class of fractional differential equations involving two fractional derivatives in the sense of Caputo fractional derivative with respect to another function $ \Phi $. Firstly, using the generalized Laplace transform method, we give an explicit formula of the solutions to the aforementioned linear problem which can be regarded as a novelty item. Secondly, by the implementation of the $ \Phi $-fractional Gronwall inequality, we analyze some properties such as estimates and continuous dependence of the solutions on initial conditions. Thirdly, with the help of features of the Mittag-Leffler functions (MLFs), we build a new comparison principle for the corresponding linear equation. This outcome plays a vital role in the forthcoming analysis of this paper especially when we combine it with the monotone iterative technique alongside facet with the method of upper and lower solutions to get the extremal solutions for the analyzed problem. Lastly, we present some examples to support the validity of our main results.
Le contre-terrorisme comme prétexte. Retour sur l’opération Sirli et la politique française
Authors: Bigo Didier , Hanon Jean-Paul
Published: March 2022

Le 21 novembre 2021, le magazine Web d’investigation Disclose publiait un dossier sur l’opération « Sirli », une coopération opérationnelle secrète entre la direction du renseignement militaire (DRM) français et les services de sécurité égyptiens du maréchal Abdel Fattah Al-Sissi. Ces révélations reposent sur des centaines de documents classés « confidentiel-défense » transmis aux journalistes par une source qui a préféré encourir les risques de poursuites que de continuer à cautionner les pratiques dont il était le témoin. Nous reproduisons le texte qu’il a fait parvenir à Disclose ainsi que les réponses qu’il a apportées à la rédaction avant de mettre ces propos en relation avec le questionnement plus général de ce numéro de Cultures & Conflits sur guerre et terrorisme.
Vers une dé-réification de « l’intérêt » dans l’analyse des conflits
Authors: Lindemann Thomas
Published: March 2022

Cette contribution revoit les articles sur les conflits armés dans la revue Cultures & Conflits dans les trois dernières décennies et examine comment elles conçoivent les situations conflictuelles, leurs acteurs et leur capacité d’agir. Selon moi, un apport majeur d’une approche anthropologique et sociologique consiste à de-réifier les conflits armés en mettant en avant la contingence, le désordre et les dimensions humainement « produites » par des acteurs contrastant singulièrement avec les études mainstream qui ne voient que ce qu’elles s’attendent à voir en fonction de leurs lentilles théoriques.
An explanation for hydrogen’s stability
Authors: Duncan Robert
Published: March 2022

The electron spin angular momentum features are revealed to be identical to those of a uniformly charged ring. The electric field for this configuration can capture the electron being accelerated toward a proton, thus explaining the stability of the hydrogen atom. In addition, the proposed
atom structure describes the bonding of two hydrogen atoms, which illuminates the covalent bond formation, the electronic state, bond length, and binding energy. Additionally, important wave properties ascribed to photons are assigned to particles with mass such as wave energy, angular frequency,
phase velocity, and quantum spin.
SILAR Synthesized ZnO Thin Films
Authors: Pawar Jayesh R. , Dudhamal Munjaji E. , Chaudhari Vijendra A. , Bogle Kashinath A. , Joshi Rajesh Arun
Published: March 2022

Zinc oxide (ZnO) thin films are synthesized by using modified successive ionic layer adsorption and reaction techniques (SILAR) on glass substrate at room temperature. These as deposited thin films are characterized for structural, compositional, surface morphology and optical characterizations using X-ray diffraction (XRD), energy dispersive X-ray absorption spectra analysis (EDAX), atomic force microscopy (AFM) and Uv-vis absorption spectroscopy. From XRD pattern; the low intensity peaks indicate that the films consist coarsely fine grains and/or amorphous in nature. The diffraction peaks observed at 2θ = 31.71 ̊, 36.27 ̊and 56.29 ̊ are attributed to (100), (101) and (110) planes having hexagonal phase while EDAX shows elemental traces for Zn and O. Surface morphology observed from the AFM corresponds granular shape evenly distributed over substrate surface.
Fabrication of Copper Ferrite Thin Films Using Spray-Pyrolysis Technique and their Structural Characterizations
Authors: Babrekar Mahesh K. , Kale Chandrashekhar M.
Published: March 2022

In the present work, pure copper ferrite (CuFe2O4) thin film has been grown on clean glass substrate by using the spray pyrolysis deposition technique. All the necessary parameters were optimized before the deposition. The deposited thin film was annealed at 500°C for 4 h and then cooled to room temperature. X-ray diffraction (XRD) technique was used to study the phase purity and crystal structure of the sample formed on the thin film. The analysis of the X-ray diffraction pattern reveals the formation of a single-phase cubic spinel structure. The lattice constant and other structural parameters calculated from XRD data are in good agreement with the reported data.
Preparation of Nickel Ferrite Nanoparticles and its Application in Nanofluids
Authors: Wadewale Arundhati , Bajaj Shakti N. , Raut Shivaji , Patil Pradip D. , Kale Swati B. , More Santosh D.
Published: March 2022

The aim of the present research work was to prepare NiFe2O4 nanoparticles using standard wet chemical method namely sol-gel auto-combustion with a view to study them in heat transfer application. The prepared nanoparticles of NiFe2O4 were then applied to prepare nanofluid with deionised water as a base fluid. The characterization of the prepared NiFe2O4 nanopowder is done by X-ray diffractometer (XRD) technique. The XRD pattern was recorded at room temperature. The analysis of XRD pattern was carried by standard software suggests that prepared nickel ferrite nanopowder possess single phase cubic spinel structure. The lattice constant was obtained by using XRD data reasonably agree with the reported values. The mean size of the particle was estimated through XRD pattern, in which the most intense peak (311) was considered to obtain full width at half maxima (FWHM). The Scherrer formula was used to obtain average crystallite size which was found to be 33 nm. The surface morphology of the prepared NiFe2O4nanopowder was studied by means of scanning electron microscopy (SEM) technique. The average grain size determined by linear intercept method was found to be of the order of 40 nm. The SEM image shows formation of spherical grains with some agglomeration. The prepared nanofluid of nickel ferrite was used to estimate thermal conductivity. It was found that, the thermal conductivity of NiFe2O4nanofluid was increased compared to deionised water.
Annealing Assisted Structural Modifications in CdS Thin Films
Authors: Dudhamal Munjaji E. , Pawar Jayesh R. , Chaudhari Vijendra A. , Bogle Kashinath A. , Joshi Rajesh Arun
Published: March 2022

The present article deals with synthesis of CdS thin films using cost effective chemical bath deposition method and study effect of annealing over the structural properties using X-ray diffraction pattern (XRD). The XRD pattern revealed shift in peak position and variation in intensity upon annealing at different temperatures; this may be attributed to annealing assisted modifications in composition of the thin films. The as deposited CdS thin films represents peaks corresponding to (002), (101), (111) and (110) which in case of annealed samples at 200 and 400oC get modified and slightly shifted with rising some new peaks corresponding to (200) and (001) respectively. The crystallite size of the CdS thin films upon annealing is observed to be increased this may be co-related to the fact energy induced grain growth.
Quantification of Trace Elemental Concentration in Bark and Leaves of Aegle marmelos L. Used against Asthma Disease in Telangana by EDXRF-Technique
Authors: Jyothsna Sriram , Sammaiah D. , Manjula G. , Kumar Allam Mahesh
Published: March 2022

ED-XRF technique was used for quantification of elemental concentration in bark and leaves of Aegle marmelos L. is an anti-asthmatic herbal plant. 13 major and trace elements namely P, S, K, Cl, Mn, Ca, Cu, Fe, Zn, Rb, Sr, Br, and Se were determined, concentrations measured and compared between bark and leaves and with certified values of NIST 1515 apple leaves. The experimental data reveal that leaves of A. marmelos showed higher concentration of Mn, K, Zn, Se, Cl, Ca, Br and Rb whereas the bark showed higher concentration of P, S, Fe, Cu, and Sr. The major and trace elemental concentrations in both bark and leaves were found to be diverse. The significant findings of the current study are, the leaves of A. marmelos were considered more efficient traditional herbal medicine than bark, since they are found to be containing a rich amount of Mn, K, Zn, Se, Cu, and Fe. Therefore, the tribal people of Telangana are widely used by this plant to prevent asthma disease.
Risk Based Underwater Inspection RBUI Methodology for Subsea Integrity Management SubSIM of Subsea Assets in Malaysian Operations
Authors: Yaakob Ahmad Razali , Berwanto Awaluddin , Ismail Izyani , Rashid M Fahmie , Ahmad Zawawi M Syafiq Husni , Abdul Hamid Nadiah Fatihah , Khan Riaz , Hammond Steven
Published: March 2022

PETRONAS currently operates several subsea fields in Malaysian water. In 2019, PETRONAS embarked on developing Subsea Integrity Management (SubSIM) for Malaysian operations, to better understand and manage the operating risks of subsea assets throughout the lifecycle of a subsea field development.

Subsea Integrity Management (SubSIM) is a Management System which ensures appropriate processes and procedures are applied throughout the subsea asset life cycle, from commissioning all the way through to decommissioning, to ensure that through a process of risk management, the subsea asset fitness-for-purpose will be upheld. PETRONAS has also initiated a Data-Driven Maintenance workstream whereby the PETRONAS's Upstream Inspection and Maintenance Assurance Guideline (U-IMAGe) has been determined as a key enabler for PETRONAS top-quartile oil and gas industry performance.

U-IMAGe is a standard suite of guidelines for the implementation of inspection and maintenance programs in PETRONAS upstream production facilities, where subsea assets are part of this (PETRONAS, 2018b). An essential element of U-IMAGe is an effective data management to drive inspection and maintenance strategy. In order to ensure effective delivery of SubSIM and to support and strengthen the U-IMAGe implementation, PETRONAS has embarked on a Subsea Risk Based Underwater Inspection (RBUI) strategy and methodology for its subsea assets (PETRONAS 2020). As part of SubSIM that supports the U-IMAGe implementation, the Subsea RBUI approach prioritizes and optimizes inspection efforts by balancing risk costs (people, safety, environmental or business related) with inspection costs, and allows a better understanding of risk levels over the intended life of the subsea asset to initiate cost effective remedial actions.

The Subsea RBUI involves identification of threats on a subsea asset, development of the integrity loops and risk assessments (PETRONAS 2020). The risk assessments are then used as a tool to develop suitable inspection plans. The risk assessments will also be used to optimise the operational inspection plans and frequencies, focusing on the safety, environmental and financial risks as well as the inspection costs.

This paper will address the methodology and tools used to conduct Subsea Risk Based Underwater Inspection (RBUI) planning for subsea asset within PETRONAS Operations.
Pseudocode and Demonstration of a Multi-Use Artificial Intelligence Algorithm to Perform Challenging and Highly Optimised Pipeline/Cable Routing Cases
Authors: Lim Nigel , Lim Lucas , Komatineni Haribabu
Published: March 2022

The process of routing energy conduits (pipelines, cables and umbilicals) in offshore locations represents a critical phase in the concept planning, engineering and construction of these assets. The downstream impact of poorly designed routes is epitomized by a) increased offshore construction durations b) requirements for additional engineered mitigations from geophysical / geotechnical constraints and c) unforeseen requirements for intervention during operations. The cause of these unoptimized routes can be due to low-level engineering tasks which confines to repetitive, inefficient, and unnecessarily iterative processes between draughters, engineers and asset owners. The increasing accessibility and advancement of digital technologies enables highly optimised solutions even through difficult offshore regions.

To address the above, this paper presents the scoping, development and application of a multi-functional algorithm created using modern software code frameworks. The algorithm serves as building blocks into an artificial intelligence platform. This routing algorithm simulates, expands and adapts to engineering and consulting expertise from a worldwide network of energy experts. This recreation of expertise firstly identifies commonly encountered routing constraints such as geophysical features, seabed gradients, existing offshore facilities etc. Ideal geometric parameters are then determined to minimise route costs. These processes are then increased, thus enhancing expertise through scale.

The algorithm structure will be presented in summarised minimal pseudocode. The pseudocode will present the application programming interface (API) between the constraints based and end parameter calculation approach. The API includes digital innovations such as a) processing of offshore geotechnical survey data, b) recreating offshore locales and routes in a data environment, c) implementation of geospatial intersection detection, d) 3-dimensional route length optimisation and e) automated route selection criteria. This will demonstrate the order of magnitude replication of subject matter expertise into a digital realm, thus eliminating time-consuming, repetition and human error.

Finally, the application of the algorithm will be demonstrated by various case studies of offshore locales with challenging conditions such as highly disturbed seabeds and large quantities of existing man-made assets. The front-end cloud platform of the algorithm will be exhibited, showing a streamlined approach and improved routing engineering. Through this, engineers in the future offshore energy developments can answer the question "What is the best route?".
Evaluation of Utilisation a Hydraulic Workover Unit for Gravel Pack Job in Indonesia
Authors: Sinaga Rahmat , Tokoh Kristoforus Widyas , Sugiarto Tomi , Hutahaean Ray , Masrur Muhammad , Syafrudin Mochamad , Ferdian Ferdian , Solagratia Yosafat , Maharanoe Miazzy Isdianto
Published: March 2022

In the last 2 (two) years, the operator has been performing gravel pack (GP) completion using a Hydraulic Workover Unit (HWU). Such rigless GP explains that a drilling rig shall drill a well, running the casing and cementing then suspending the well. Next, HWU will perform the completion job to fulfill the scope of the well construction. By May 2021, HWU has done 4 (four) rigless GP with various well designs. The original background is to reduce costs of the well construction and to increase the wells delivery efficiency of a jack-up rig. This paper will compare the duration of rigless GP execution in those wells, even though the value creation of using HWU as an alternative way will also be reviewed.

Regarding operational capabilities, HWU has several limitations that differ from a jack-up rig. Several disadvantages range from HWU's construction, tripping performance, lifting practices until contract management. From a construction aspect, HWU is more sensitive to weather thus prone to the operation suspension. In some platforms, HWU has more complexity lifting operations due to the crane's reach limitation, therefore an additional crane is needed to assist. Furthermore, HWU utilizes traveling slips for tripping, as such the length of the cylinder will affect the speed. Moreover, HWU is not in a favorable situation due to some important services are not dedicated to support the operation. For example, the handling equipment for upper completion is managed through a call-out contract and the logistic vessel has to be shared with other fleets. Therefore, it is essential to develop a solid course of action to achieve the objective of utilizing HWU in GP jobs.

Related to performance enhancement, some initiatives have been pursued i.e. changing the position of the barge to reduce weather sensitivity, developing the effective logistic plan, and managing some activities to be performed by the jack-up rig (in offline mode). Moreover, adding some pipe racks and enforcing all crew to improve tripping speed safely are also part of the improvement. Also, it is essential to select the equipment as necessary as possible to deal with the call-out contract and to increase the economic value of the project. Finally, performance monitoring and documenting lesson learned are critical to pursue for future improvement.

All of those efforts have been paid off as indicated by the learning curve which has been shaped.

Referring to the duration and expenses of the first rig-less GP job, the latest well has attained a reduction in costs by 60% and less 66% of time completion. The fact implies that HWU is worth pursuing in executing GP completions as an alternative to the conventional way.