bluuebunny/crossref_metadata_2025 huggingface dataset:
PENGARUH GAYA KEPEMIMPINAN, KEPUASAN KERJA DAN BUDAYA ORGANISASI TERHADAP KINERJA PEGAWAI PADA POLITEKNIK PELAYARAN BAROMBONG
Authors: Mappiasse Hamka , Maryadi Maryadi , Sjarlis Sylvia
Published: July 2023

Abstrak

Abstrak Hamka Mappiase. 2022. Pengaruh Gaya Kepemimpinan, Kepuasan Kerja, dan Budaya Organisasi Terhadap Kinerja Pegawai Pada Politeknik Pelayaran Barombong, dibimbing oleh Maryadi dan Sylvia Sjarlis. Penelitian ini bertujuan untuk mengetahui dan menganalisis gaya kepemimpinan, kepuasan kerja dan budaya organisasi secara parsial dan simultan terhadap kinerja pegawai pada Politeknik Pelayaran Barombong. Rancangan penelitian diartikan sebagai strategi untuk melaksanakan penelitian. Apabila diklasifikasikan dari jenisnya, maka penelitian ini tergolong penelitian tingkat eksplanasi (level of explanation) atau tingkat penjelasan.

Populasi yang digunakan dalam penelitian ini adalah seluruh pegawai pada Politeknik Pelayaran Barombong yang berjumlah 200 orang pegawai. Penentuan sampel dalam penelitian ini menggunakan pendapat Arikunto dalam Saban,Echdar (2017) bahwa jika jumlah subyeknya besar (lebih besar dari 100), maka dapat diambil antara 10- 15% atau 20-55%, atau lebih tergantung sedikit banyaknya dari: kemampan peneliti dilihat dari waktu, tenaga dan dana. Berdasarkan pendapat inilah maka sampel penelitian ini ditentukan sebesar 25 % x 200 populasi = 50 orang pegawai.

Hasil penelitian ini menunjukkan bahwa dari hasil uji F atau pengujian secara simultan menunjukkan bahwa Fhitung nilai sebesar 15,541 dan Ftabel dengan nilai sebesar 2,80. Sehingga menunjukkan bahwa Fhitung > Ftabel dengan signifikansi sebesar 0,000 < 0,05. Hasil ini menunjukkan bahwa secara simultan gaya kepemimpinan, kepuasan kerja dan budaya organisasi terhadap kinerja pegawai pada Politeknik Pelayaran Barombong. Dari uraian uji t diketahui nilai thitung variabel gaya kepemimpinan, kepuasan kerja dan budaya organisasi secara parsial berpengaruh positif dan signifikan terhadap Kinerja Pegawai Politeknik Pelayaran Barombong. Selanjutnya, variabel gaya kepemimpinan merupakan variabel yang berpengaruh paling dominan dengan nilai beta sebesar 0,440.

 

Kata Kunci : Gaya Kepemimpinan, Kepuasan Kerja, Budaya Organisasi dan Kinerja.
PENGARUH DISIPLIN KERJA, BUDAYA KERJA DAN KOMPETENSI TERHADAP KINERJA PEGAWAI PADA KANTOR CAMAT MATAKALI KABUPATEN POLEWALI MANDAR
Authors: Jalil Abdul , Idris Muhammad , Salim Muhammad
Published: July 2023

Penelitian ini bertujuan untuk menganalisis pengaruh disiplin kerja, budaya kerja dan kompetensi secara parsial dan simultan terhadap kinerja pegawai pada Kantor Camat Matakali Kabupaten Polewali Mandar.

Populasi dalam penelitian ini adalah seluruh pegawai yang bekerja di Kantor Camat Matakali Kabupaten Polewali Mandar yang berjumlah 37 orang. Karena populasi kurang dari 100 orang, maka sampel ditentukan dengan teknik sampling jenuh (sensus). Sehingga sampel yang digunakan dalam penelitian ini adalah sebanyak 37 orang. Tehnik pengambilan data dilakukan melalui angket/kuesioner dimana setiap jawaban responden dinilai dengan menggunakan skor menurut skala Likert.

Hasil penelitian ini menunjukkan bahwa dari hasil uji F atau pengujian secara simultan menunjukkan bahwa Fhitung nilai sebesar 12,398 dan Ftabel dengan nilai sebesar 2,89. Sehingga menunjukkan bahwa Fhitung > Ftabel dengan signifikansi sebesar 0,000 < 0,05. Hasil ini menunjukkan bahwa disiplin kerja, budaya kerja dan kompetensi secara simultan berpengaruh signifikan terhadap kinerja pegawai pada Kantor Camat Matakali Kabupaten Polewali Mandar. Dari uraian uji t diketahui bahwa disiplin kerja, budaya kerja dan kompetensi secara parsial masing-masing berpengaruh positif dan signifikan terhadap kinerja pegawai pada Kantor Camat Matakali Kabupaten Polewali Mandar. Selanjutnya, variabel disiplin kerja merupakan variabel yang berpengaruh paling dominan dengan nilai beta sebesar 0,519.

Kata kunci : Disiplin Kerja, Budaya Kerja, Kompetensi dan Kinerja
PENGARUH MOTIVASI, KEPEMIMPINAN DAN TAMBAHAN PENGHASILAN PEGAWAI (TPP) TERHADAP KINERJA APARATUR SIPIL NEGARA PADA SEKRETARIAT DAERAH KABUPATEN JENEPONTO
Authors: Syam Akbar , Maryadi Maryadi , D Saripuddin
Published: July 2023

Penelitian ini bertujuan untuk menganalisis 1) pengaruh motivasi, Kepemimpinan dan Tunjangan Penghasilan Aparatur sipil negara secara parsial terhadap kinerjai Aparatur sipil negara Pada Sekretariat Daerah Kabupaten Jeneponto. 2) Untuk menganalisis pengaruh motivasi Kepemimpinan dan Tunjangan Penghasilan Aparatur sipil negara secara simultan terhadap kinerjai Aparatur sipil negara Pada Sekretariat Daerah Kabupaten Jeneponto. 3) Untuk menganalisis variabel mana yang paling dominan berpengaruh terhadap kinerjai Aparatur sipil negara Pada Sekretariat Daerah Kabupaten Jeneponto.Penelitian ini dilakukan pada Sekretariat Daerah Penentuan sampel dilakukan secara teknik sampling jenuh (sensus) yaitu sebanyak 110 orang pegawai. Metode pengumpulan data yang diguanakan adalah angket dan studi dokumen. Metode analisis yang digunakan adalah analisis statistik deskriptif dan analisis regresi linear berganda.Hasil penelitian menyimpulkan bahwa variabel yang dominan berpengaruh terhadap kinerja pegawai Sekretariat Daerah adalah pemberian Tunjangan, hal ini berarti semakin tinggi tunjangan penghasilan pegawai akan lebih mendorong peningkatan kinerja pegawai Sekretariat Daerah
CHARACTERIZATION OF BATAK TOBA SETTLEMENT IN TARUTUNG CASE STUDY: LUMBANTOBING CLAN SETTLEMENT IN SAIT NI HUTA
Authors: Lumbantobing Tantri Rospita Rointan , M. Siahaan Nelson , Hadinugroho Dwi Lindarto
Published: July 2023

The Batak Toba settlement has been widely discussed in previous studies. All of them were conducted in the lakeside area of Lake Toba, mostly in Samosir region and Toba region, and none has ever been done in Tarutung. Formerly known as Silindung, Tarutung which is sited about 48 Km from the nearest lakeside, Meat, has a differ geography from those regions near the lakeside. Among all Batak Toba settlements, Tarutung was also the first to experience modernization through Christianity, evangelized by I. L. Nommensen back in 1864. It is believed that both geography and modernization have significant influences on the Batak Toba settlements in Tarutung. Using qualitative descriptive approach, this research provides an in-depth knowledge of traditional Batak Toba settlements through stages of description and analysis on traditional settlement in Sait Ni Huta compared the elements of huta. This research is conducted for the purpose of identifying the traditional Batak Toba settlement in Tarutung as a first step to compare with those in other Batak Toba settlements.
Silver-based SERS substrates fabricated using a 3D printed microfluidic device
Authors: Sonexai Phommachith , Van Nguyen Minh , Huy Bui The , Lee Yong-Ill
Published: July 2023

The detection of harmful chemicals in the environment and for food safety is a crucial requirement. While traditional techniques such as GC–MS and HPLC provide high sensitivity, they are expensive, time-consuming, and require skilled labor. Surface-enhanced Raman spectroscopy (SERS) is a powerful analytical tool for detecting ultralow concentrations of chemical compounds and biomolecules. We present a reproducible method for producing Ag nanoparticles that can be used to create highly sensitive SERS substrates. A microfluidic device was employed to confine the precursor reagents within the droplets, resulting in Ag nanoparticles of uniform shape and size. The study investigates the effects of various synthesis conditions on the size distribution, dispersity, and localized surface plasmon resonance wavelength of the Ag nanoparticles. To create the SERS substrate, the as-synthesized Ag nanoparticles were assembled into a monolayer on a liquid/air interface and deposited onto a porous silicon array prepared through a metal-assisted chemical etching approach. By using the developed microfluidic device, enhancement factors of the Raman signal for rhodamine B (at 10−9 M) and melamine (at 10−7 M) of 8.59 × 106 and 8.21 × 103, respectively, were obtained. The detection limits for rhodamine B and melamine were estimated to be 1.94 × 10−10 M and 2.8 × 10−8 M with relative standard deviation values of 3.4% and 4.6%, respectively. The developed SERS substrate exhibits exceptional analytical performance and has the potential to be a valuable analytical tool for monitoring environmental contaminants.
The Influence of Cultural Context on English Teaching.
Authors: Ordóñez Procel Gilmer Javier , Poma Tacuri Manuel Alejandro , López López Katherine Alexandra , Correa Criollo Pablo Israel
Published: July 2023

As English continues to assert its dominance as a global language, the incorporation of cultural context into English Language Teaching (ELT) emerges as a paramount consideration. This literature review synthesizes scholarly work to investigate the multifaceted relationship between cultural context and ELT. Methodologically, this study involved an extensive review of empirical and theoretical literature published in the past five years. The analytical categories employed include Cultural Integration, Cultural Intelligence, English as an International Language (EIL) and English as a Lingua Franca (ELF), Culturally Responsive Assessment, Learners’ Identities, Language Policies, Context-Specific Methodologies, Intercultural Communication, Technology in Cultural Exposure, and Challenges in Culturally Responsive ELT. Findings indicate that cultural context significantly influences ELT processes and outcomes. Culturally responsive teaching practices, curricula, assessments, and policies are vital in preparing learners to become effective communicators and global citizens. Moreover, technology is identified as a facilitator for cultural exposure and exchange. The review concludes with recommendations for culturally responsive ELT practices and policies and calls for further research in underrepresented regions.
Multiwavelength Characterization of the High-mass X-Ray Binary Population of M33
Authors: Lazzarini Margaret , Hinton Kyros , Shariat Cheyanne , Williams Benjamin F. , Garofali Kristen , Dalcanton Julianne J. , Durbin Meredith , Antoniou Vallia , Binder Breanna , Eracleous Michael , Vulic Neven , Yang Jun , Wik Daniel , Gasca Aria , Kuauhtzin Quetzalcoatl
Published: July 2023

We present multiwavelength characterization of 65 high-mass X-ray binary (HMXB) candidates in M33. We use the Chandra ACIS survey of M33 (ChASeM33) catalog to select hard X-ray point sources that are spatially coincident with UV-bright point-source optical counterparts in the Panchromatic Hubble Andromeda Treasury: Triangulum Extended Region catalog, which covers the inner disk of M33 at near-IR, optical, and near-UV wavelengths. We perform spectral energy distribution fitting on multiband photometry for each point-source optical counterpart to measure its physical properties including mass, temperature, luminosity, and radius. We find that the majority of the HMXB companion star candidates are likely B-type main-sequence stars, suggesting that the HMXB population of M33 is dominated by Be X-ray binaries (Be-XRBs), as is seen in other Local Group galaxies. We use spatially resolved recent star formation history maps of M33 to measure the age distribution of the HMXB candidate sample and the HMXB production rate for M33. We find a bimodal distribution for the HMXB production rate over the last 80 Myr, with a peak at ∼10 and ∼40 Myr, which match theoretical formation timescales for the most massive HMXBs and Be-XRBs, respectively. We measure an HMXB production rate of 107–136 HMXBs/(M
⊙ yr−1) over the last 50 Myr and 150–199 HMXBs/(M
⊙ yr−1) over the last 80 Myr. For sources with compact object classifications from overlapping NuSTAR observations, we find a preference for giant/supergiant companion stars in black hole HMXBs and main-sequence companion stars in neutron star HMXBs.
Don’t Believe the Hype(r): The Yellow Supergiants of Westerlund 1
Authors: Beasor Emma R. , Smith Nathan , Andrews Jennifer E.
Published: July 2023

Yellow hypergiants (YHGs) are often presumed to represent a transitional post-red supergiant (RSG) phase for stars ∼30–40 M
⊙. Here we present visual-wavelength echelle spectra of six YHG candidates in the Galactic cluster Westerlund 1, and we compare them to known YHGs, IRC +10420 and Hen 3-1979. We find that the six YHG candidates do not exhibit any metal emission lines, nor do they show strong Hα emission, and as such do not meet the criteria necessary to be classified as YHGs. In conjunction with their moderate luminosities of

log
(
L

/

L

⊙

)

= 4.7–5.4 estimated from optical/infrared photometry, we suggest instead that they are normal yellow supergiants (YSGs) with more modest initial masses around 15–20 M
⊙. This adds additional support to the hypothesis that Wd1 is a multiage cluster with an older age than previously assumed, and is not a ∼5 Myr old cluster caught at a very specific transitional point when single-star evolution might yield Wolf–Rayet stars, luminous blue variables, RSGs, and YHGs in the same cluster. Nevertheless, the population of YSGs in Wd1 is very unusual, with YSGs outnumbering RSGs, but with both spanning a large luminosity range. Here, we discuss evolutionary scenarios that might have led to the high fraction of YSGs. The number of YSGs and their significant luminosity spread cannot be explained by simple population synthesis models with single or binary stars. Even with multiple ages or a large age spread, the high YSG/RSG ratio remains problematic. We suggest instead that the objects may experience a prolonged YSG phase due to evolution in triple systems.
Evolution of Circumstellar Disks around T Tauri Stars as a Function of Stellar Age
Authors: Prato L. , Simon M.
Published: July 2023

We analyzed the distribution of surface gravities,

log

g

, of a sample of classical T Tauri stars in Taurus to examine the relationship between stellar ages and circumstellar disk evolution. This is critical to understanding the timescales for planet formation. Given the uncertainties in

log

g

, we find no distinction between the ages of stars with and without disks beyond that identified previously. This approach, while avoiding the contamination that plagues young star luminosity measurements, will require precisions in

log

g

 of 0.05 dex or better to be effective.
Identification and phylogenetic analysis in Pterorhinus chinensis (Aves, Passeriformes, Leiothrichidae) based on complete mitogenome
Authors: Bai Guirong , Yuan Qingmiao , Guo Qiang , Duan Yubao
Published: July 2023

The Black-throated Laughingthrush (Pterorhinus chinensis) is a bird belonging to the order Passeriformes and the family Leiothrichidae, and is found in Cambodia, China, Laos, Myanmar, Thailand and Vietnam. Pterorhinus chinensis was once classified as belonging to the genus Garrulax. However, recent research has reclassified it in the genus Pterorhinus. In this study, we sequenced and characterized the complete mitogenome of P. chinensis. The complete mitochondrial genome of P. chinensis is 17,827 bp in length. It consists of 13 PCGs, 22 tRNAs, two rRNAs, and two control regions. All genes are coded on the H-strand, except for one PCG (nad6) and eight tRNAs. All PCGs are initiated with ATG and stopped by five types of stop codons. Our comparative analyses show irregular gene rearrangement between trnT and trnP genes with another similar control region emerging between trnE and trnF genes compared with the ancestral mitochondrial gene order, called “duplicate CR gene order”. The phylogenetic position of P. chinensis and phylogenetic relationships among members of Leiothrichidae are assessed based on complete mitogenomes. Phylogenetic relationships based on Bayesian inference and maximum likelihood methods showed that Garrulax and (Pterorhinus + Ianthocincla) formed a clade. Leiothrix and Liocichla also formed a clade. Our study provides support for the transfer of P. chinensis from Garrulax to Pterorhinus. Our results provide mitochondrial genome data to further understand the mitochondrial genome characteristics and taxonomic status of Leiothrichidae.
Artificial intelligence for video game visualization, advancements, benefits and challenges
Authors: Wu Yueliang , Yi Aolong , Ma Chengcheng , Chen Ling
Published: July 2023

In recent years, the field of artificial intelligence (AI) has witnessed remarkable progress and its applications have extended to the realm of video games. The incorporation of AI in video games enhances visual experiences, optimizes gameplay and fosters more realistic and immersive environments. In this review paper, we systematically explore the diverse applications of AI in video game visualization, encompassing machine learning algorithms for character animation, terrain generation and lighting effects following the PRISMA guidelines as our review methodology. Furthermore, we discuss the benefits, challenges and ethical implications associated with AI in video game visualization as well as the potential future trends. We anticipate that the future of AI in video gaming will feature increasingly sophisticated and realistic AI models, heightened utilization of machine learning and greater integration with other emerging technologies leading to more engaging and personalized gaming experiences.
Religions tibétaines
Authors: Sernesi Marta
Published: July 2023

On trouvera ci-dessous les résumés des conférences pour les années 2020-2021 et 2021-2022. Dans les deux cas, le premier semestre, nous avons abordé des thèmes et des sources relatifs à « la deuxième transmission du bouddhisme au Tibet » (phyi dar) : la première année, nous avons lu et analysé un traité polémique du début du xiiie siècle ; la deuxième année, le séminaire a porté sur les sources les plus anciennes relatives à la figure et aux enseignements de sGam po pa bSod nams rin chen (1079-1153). Au cours du deuxième semestre, nous avons poursuivi l’étude de la codification des pratiques tantriques généralement connues sous le nom des « Six enseignements de Nāropā » (nā ro chos drug).
Initiation et lecture des textes des temples d’époque ptolémaïque et romaine
Authors: Fortier Alain
Published: July 2023

L’objectif de cette conférence est d’appréhender la complexité de l’écriture hiéroglyphique, dite ptolémaïque », en usage dans les temples égyptiens de l’époque gréco-romaine, et de faire découvrir la richesse des textes religieux gravés sur les parois des temples ainsi que d’autres compositions hiéroglyphiques contemporaines sur différents supports (stèles, statues, etc.).
Religions et culture de l’Arabie du Sud préislamique. Du polythéisme au monothéisme (viiie s. avant n. è.- vie s. n. è.)
Authors: Gajda Iwona
Published: July 2023

Programme de l’année 2021-2022 : Les conférences de l’année 2021-2022 ont débuté par la présentation générale des religions de l’Arabie du Sud, polythéistes et monothéistes. Ensuite, pour compléter le thème des conférences de l’année précédente (les inscriptions expiatoires), nous avons réexaminé deux inscriptions, une confession à la divinité Ḥalfān et un texte qui réglait les amendes concernant la transgression des lois liées au culte de cette divinité. Le second semestre a été consacré au réexamen de plusieurs inscriptions monothéistes et à la présentation de lieux de culte.
Systèmes de pensées et de croyances médiévaux
Authors: Grellard Christophe
Published: July 2023

Dans le cadre du séminaire, nous avons d’abord poursuivi l’enquête menée sur des questions de théologie morale entre le xiie et le xvie siècle dans le but de comprendre les transformations du christianisme médiéval au seuil de la modernité ; ensuite, nous avons cherché à interroger l’idée de systèmes de croyances et de pensées médiévaux en examinant la porosité des formes discursives ultérieurement qualifiées de « philosophique » et « littéraire ». De fait, la première partie du séminaire, menée en collaboration avec Irène Rosier-Catach, Raphaël Eckert et Corinne Leveleux-Teixeira a porté sur la notion d’intention en sémantique, en droit et en théologie. La deuxième partie était consacrée à une lecture suivie du De vita spirituali animae de Jean Gerson (1402). Enfin, la troisième partie, organisée avec Marco Nievergelt, s’est attachée à élucider les rapports entre littérature et philosophie au Moyen Âge.
Religions, savoir et politique dans l’Europe moderne
Authors: De Franceschi Sylvio Hermann
Published: July 2023

Programme de l’année 2021-2022 : I. Questions d’histoire de la théologie mystique doctrinale (xviie-xxe siècle). — II. Questions d’histoire de l’apologétique chrétienne (xviiie-xxe siècle).
Penser autrement les ruines : du Tiers paysage rural à la réinvention des communs
Authors: Darcis Damien
Published: July 2023

Dans cet article, nous analyserons le concept de Tiers paysage rural qui désigne, selon Gilles Clément, des espaces ruraux délaissés, abandonnés par les humains, laissés en friche, autrement dit des ruines, dans lesquelles la nature reprendrait ses droits. Dans un premier temps, nous montrerons comment cette conception du Tiers paysage, bien que relativement récente (2004), s’esquisse déjà à la fin du xviiie siècle, puis prend forme tout au long du xixe siècle. Alors que la modernité marque l’avènement d’un monde se structurant autour, d’un côté, de l’industrie et, de l’autre, de la nature, les campagnes, qui n’intègrent aucune de ces catégories, n’acquerront le statut de paysage qu’à la condition d’être « abandonnées à la nature ». Dans un deuxième temps, nous dégagerons la contradiction fondamentale que recouvre cette notion de Tiers paysage ruraux : si c’est l’arrêt des activités humaines qui permet de définir certains espaces ruraux comme des Tiers paysages, sans intervention humaine, ceux-ci perdent ce qui fait leur spécificité sous l’effet du reboisement. Enfin, dans un troisième temps, nous montrerons pourquoi cette contradiction peut être considérée comme le point de départ d’une réinvention de la relation des vivants humains et non-humains et de leur territoire.
Rêver ou penser l’Anthropocène ? Usages de la ruine dans la non-fiction de l’extrême contemporain
Authors: Aubry-Morici Marine
Published: July 2023

Cet article explore la manière dont plusieurs écrivains de non-fiction et artistes du réel de l’extrême contemporain pensent et figurent l’Anthropocène à l’aide des ruines contemporaines. Pour faire face à l’invisibilité relative et la complexité extrême du phénomène, ils recourent souvent à l’emprunt, celui de ruines issues d’autres catastrophes. Par un phénomène de surimpression hallucinatoire, ils projettent la catastrophe écologique sur les ruines existantes en récupérant la puissance de l’imaginaire atomique ou l’effacement idéologique de la désaffection économique. Ce « catachronisme » (Srinivas Aravamudan, 2013), parti-pris d’un certain nombre d’artistes et écrivains contemporains, fait néanmoins écran, en esthétisant le réchauffement climatique. Quels usages alternatifs de la ruine sont, à l’inverse, mobilisés par les artistes qui souhaitent cultiver un regard exempt de fascination mélancolique ? En s’appuyant sur quelques exemples (Anna Lowenhaupt Tsing, William T. Volmann, Sylvain Tesson, Pierre Huyghe), nous tenterons de voir quelle ligne de partage se dessine entre esthétisation et mobilisation des ruines.
A tour of Nancy Holt’s ruins: from entropic monuments to system works
Authors: Manolescu Monica
Published: July 2023

This article explores the evolving meaning and nature of ruins in American artist Nancy Holt’s practice. A concern with entropy and monumentality was shared by many American artists of the 1960s and 1970s, but Holt developed an original artistic reflection on ruins and the paradigms that frame their construction and interpretation, moving in directions inspired by ecology, as well as myth and ritual. Discussions of selected works (Ruin View: The Temple of the Sun, 1969; Stone Enclosure. Rock Rings, 1977-1978; and Sky Mound, 1984, unfinished) show distinct approaches over time. Site-specific sculpture and land reclamation consecrate ruins as critical and inspirational objects situated in the landscape that allow Holt to develop artworks with ramified temporalities, committed to the history of the site and aligned with celestial phenomena. Versions of contemporary ruins such as waste are embedded in an ecological approach to reclamation that relies on advanced technology to limit environmental damage and produces “system works” that connect the reclaimed site to larger ecosystems and the cosmos.
Errors in the Written Productions of Spanish Undergraduate Engineering Students
Authors: Rubio Antonio Daniel Juan
Published: July 2023

Writing is a language skill that for most FL students is difficult to master. Therefore, students often find it difficult to write a specific composition which is not their FL. Especially for undergraduate technical students, this seems to be a challenging task since the presence of difficulties in any FL writing forces them to commit errors in their written productions. Therefore, what this chapter will identify is those errors made by engineering students in a public Spanish Polytechnic University over the last two years. The authors shall attempt to categorise errors based on their source following the comparative taxonomy proposed by Dulay, Burt, and Krashen. So, a total of 60 essays undertaken by these engineering students were selected taking into account their productions in the task assigned during the semester. The main objective is to prove that the results have undoubtedly demonstrated that the majority of errors committed by these engineering students can be classified as belonging to the interlingual category, being the category with the highest number of occurrences.
Investigation of Essential Skills for Data Analysts
Authors: Zhang Jin , Le Taowen , Chen Jianyao
Published: July 2023

As the data-analysts job market grows, many colleges and universities have started offering a data analytics curriculum. However, there are potential gaps between the skills business organizations expect of data analysts and the skills universities and colleges teach their students. This study collected 2500+ data-analyst job ads posted on LinkedIn and analyzed them using distribution analysis, cross-tabulation analysis, and cluster analysis. Among many findings, this study identified five most essential nontechnical skills and five most essentials areas of technical skills. In addition, of 90+ computer programs business organizations expect data analysts to use, this study identified SQL, Microsoft Excel, Tableau, Python, and Microsoft Power BI to be the five most essential computer programs for potential data analysts to master.
Single-Cell Transcriptomic Analysis Links Nonmyelinating Schwann Cells to Proinflammatory Response in the Lung
Authors: Heredia Jose E , Jung Min , Balestrini Alessia , Doerr Jonas , Paler-Martinez Andres , Mozzarelli Alessandro , Riol-Blanco Lorena , Kaminker Joshua S , Ding Ning
Published: July 2023

The lung is a barrier tissue with constant exposure to the inhaled environment. Therefore, innate immunity against particulates and pathogens is of critical importance to maintain tissue homeostasis. Although the lung harbors both myelinating and nonmyelinating Schwann cells (NMSCs), NMSCs represent the most abundant Schwann cell (SC) population in the lung. However, their contribution to lung physiology remains largely unknown. In this study, we used the human glial fibrillary acidic protein promoter driving tdTomato expression in mice to identify SCs in the peripheral nervous system and determine their location within the lung. Single-cell transcriptomic analysis revealed the existence of two NMSC populations (NMSC1 and NMSC2) that may participate in pathogen recognition. We demonstrated that these pulmonary SCs produce chemokines and cytokines upon LPS stimulation using in vitro conditions. Furthermore, we challenged mouse lungs with LPS and found that NMSC1 exhibits an enriched proinflammatory response among all SC subtypes. Collectively, these findings define the molecular profiles of lung SCs and suggest a potential role for NMSCs in lung inflammation.
Prediction of Rotorcraft Broadband Trailing-Edge Noise and Parameter Sensitivity Study
Authors:   University of California Davis, Li Sicheng , Lee Seongkyu
Published: July 2023

This paper investigates effects of rotorcraft design and operating parameters on its trailing-edge noise. A rotor trailing-edge noise prediction method is first developed, where the aerodynamics and the turbulence wall pressure spectrum near the trailing edge on airfoils are predicted by a combination of the standard blade element momentum theory (BEMT), a viscous boundary-layer panel method, and a recently developed empirical wall pressure spectrum model. The coordinate transformations are combined with the Amiet model to predict far-field noise. Compared to experimental data, the validation of this method demonstrates its advantage and validity for airfoil and rotorcraft broadband noise predictions. Thereafter, this method is used to study effects of rotorcraft design and operating parameters on rotor trailing-edge noise. It is found that the tip Mach number is a dominant factor for rotor trailing-edge noise. It is found that the broadband noise scales with the 5.5th power of the rotor tip Mach number. Detailed trend analyses of noise levels as a function of frequency are presented in terms of collective pitch angle, twist angle, blade chord length, and rotor radius. It is found that the collective pitch angle, twist angle, and the chord length make noticeable impacts on the low- and mid-frequency noise. A dipole noise directivity is observed, and the directivity and geometric attenuation of rotor trailing-edge noise can be well represented by a semi-analytic equation.
Regarding the Perceptual Significance and Characterization of Broadband Components of Helicopter Source Noise
Authors:   NASA Langley Research Center, Christian Andrew , Caston Jarrett , Greenwood Eric
Published: July 2023

This paper attempts to characterize the high-frequency components of in-flight, near-field noise measurements of a Bell206B helicopter. This noise is shown to be largely broadband, and displays a pattern of modulation that appears to bean audible and salient feature of the noise. The development of a frequency domain technique is given that uses very short (in time) discrete Fourier transforms with windowing and overlap in order to produce a representation of how the 1/3rd octave band spectrum of the noise varies over time scales shorter than a blade passage. The output of this method can be used to resynthesize the source noise. This resynthesis evidences natural variations that are perceptually similar to those seen in the original recording, and which would not be predicted by contemporary rotorcraft noise analysis techniques. These concepts are then applied in an attempt to synthesize helicopter source noise from a physics-based prediction that includes such modulating high frequency components. The elevated significance of broadband noise on future prediction efforts is discussed.
Effect of Pitch Attitude on the Performance and Acoustics of a Lift-Offset Coaxial Rotor Based on High-Fidelity CFD/CSD Simulations
Authors:   University of California Davis, Jia Zhongqi ,   Pennsylvania State University, Sharma Kalki , Lee Seongkyu , Brentner Kenneth
Published: July 2023

This paper investigates the effect of pitch attitude on both performance and acoustics of a lift-offset coaxial rotor based on a first-principles and high-fidelity CFD/CSD loose coupling approach at 150 and 200 knots. The pitch attitudes selected for this research are -5°, 0°, and 5°. The CFD/CSD loose coupling simulations are carried out using the CREATE™-AV software Helios while the coaxial rotor acoustics is simulated using PSU-WOPWOP at eight microphones positioned below the lower rotor. A detailed aerodynamic analysis is performed at 150 knots. A total of six major aerodynamic interactions are identified: 1) hub-wake interaction,2) self-BVI, 3) parallel rotor-to-rotor BVI, 4) blade-crossover events, 5) root-induced BVI, and 6) reversed-flow edge-vortex interactions. The strength of these interactions is dependent on the vehicle pitch attitude. The cases with negative pitch attitude show significantly stronger impulsive pressure pulses, which is found to be induced by parallel rotor-to-rotor BVIs of the lower rotor. Moreover, the positive and zero pitch attitude cases tend to dominate the acoustic region on the starboard side of the coaxial rotor, whereas the negative pitch attitude case shows higher acoustic pressure peaks on the port side. Overall, the case with a positive pitch attitude shows significant improvement in rotor aerodynamic efficiency, rotor acoustics, and vehicle power performance at high speed. The hemispherical acoustic simulation results at 150 knots also show that the noise is less likely to propagate in the forward direction with a positive pitch attitude.
Comparison of Acoustic Predictions Using Distributed and Compact Airloads
Authors:   Rensselaer Polytechnic Institute, Misiorowski Matthew ,   US Army CCDC ARL, Anusonti-Inthra Phuriwat , Gandhi Farhan
Published: July 2023

This study examines the performance and acoustics of a co-rotating coaxial rotor in hover with flow simulated using the comprehensive analysis code, RCAS, and high-fidelity CFD/CSD model with Helios. A viscous vortex particle method (VVPM) was used to model the rotor-rotor interference in RCAS. Simulations were conducted at various index angles between the upper and lower rotors. From the results it was observed that the VVPM and Helios simulations both predicted similar trends in rotor performance at various index angles. However, the VVPM simulation predicted generally higher sectional lift at the blade tips compared to the Helios results. Both the VVPM and Helios models were used to predict the acoustic properties of the rotor and the VVPM simulation (compact airloads) was found to over-predict the thickness noise by 1.25 dB at the investigated index angles. Additionally, the VVPM result was within 1 dB of the loading noise predicted by Helios (distributed airloads). In the higher harmonic range (at observer locations directly below the rotor), the VVPM acoustic results are very different than those predicted by Helios.
A Full-scale Rotor-wake Investigation of a Free-flying Helicopter in Ground Effect using BOS and PIV
Authors:   German Aerospace Center (DLR), Schwarz Clemens , Bauknecht André , Wolf Claus , Coyle Alexander , Raffel Markus
Published: July 2023

Measurements in the wake of a free-flying full-scale helicopter in ground effect were performed for both quasi-steady and unsteady maneuvering flights using stereoscopic particle image velocimetry (PIV), a time-resolved background oriented Schlieren (BOS) setup, and an optical marker tracking technique. The systems were used in a complimentary way to both visualize blade tip vortices in a large portion of the rotor wake and to capture spatially resolved velocity data close to the ground. The high sensitivity of the BOS system enabled the detection of vortices up to an age of Ψ = 630°. Different instability mechanisms as long-wave, short-wave, and pairing instabilities were observed with varying intensity for different flight conditions. A quantitative analysis of vortex locations showed a periodic variation resulting from interactions between consecutive vortices that led to vortex pairing. Characteristics of the wake outwash close to the ground were investigated by means of averaged velocity fields. Different patterns such as wall jet, recirculation, and ground vortex flow were quantitatively analyzed and found to be in good agreement with previous model helicopter experiments. The instantaneous velocity data was used to detect individual blade tip vortices with ages above 450° close to the ground and to extract vortex parameters. For a takeoff maneuver, both concentrated vortices and the formation of larger vortex structures due to bundling of several vortices were observed.
Suction and Oscillatory Blowing Flow Control of External Store Support System Flight Hardware
Authors:   CCDC AvMC ADD, Schatzman David ,   Tel Aviv University, Drori Ofek , Wilson Jacob , Seifert Avraham
Published: July 2023

This paper describes the development of a suction and oscillatory blowing (SAOB) active flow control (AFC) system, that was aimed towards achieving drag-reduction in a full-scale rotorcraft flight-test environment. The experimental work presented here includes benchtop characterization of the AFC actuators, development and testing of the AFC system using a full-scale two-dimensional airfoil at Tel Aviv University, and full scale testing of a UH-60 External Stores Support System (ESSS) in the CCDC AvMC Aviation Development Directorate 7- by 10-ft wind tunnel up to 140 knots. The airfoil tests composed of two stages, steady suction through holes on the trailing edge and the addition of pulsed blowing using SAOB actuators. The steady suction testing focused on identifying the optimal suction locations, while the SAOB experiments validated the suitability of the chosen actuator arrays to obtain the desired drag reduction at reasonable energetic cost. Tests for both steady suction and SAOB actuators resulted in 15-30% drag reduction compared to the clean baseline on the two-dimensional ESSS airfoil. Results from testing the full-scale ESSS identified the complexity of this configuration and the difficulty of transitioning directly from 2D component testing to three-dimensional testing of actual flight hardware. It became evident that by placing SAOB actuators only on the ESSS wing section, only 2-3% drag reduction was achievable. Further study is on-going to better understand aerodynamic interactions and develop a path towards more robust drag reduction.
Assessment of HPCMP CREATE-AV Helios for Interactional Aerodynamics of Hub Wakes Impinging on a Horizontal Stabilizer
Authors:   US Army, Potsdam Mark ,   Parallel Geometric Algorithms, Sitaraman Jayanarayanan
Published: July 2023

Experimental data from a high Reynolds number Interactional Aerodynamics Experiment (IAE) conducted in the Pennsylvania State University water tunnel of de-featured baseline and low drag helicopter hubs with a horizontal stabilizer downstream is compared with unsteady computational fluid dynamics (CFD) analyses using HPCMP CREATE™-AV Helios. CFD modeling employs a multi-mesh paradigm and Reynolds-Averaged Navier-Stokes (RANS) or Detached Eddy Simulation (DES) turbulence models. Total hub drag is predicted within 5%, while peakto-peak loads, azimuthal variation and frequency content are fairly predicted. The drag reduction of the low drag hub compared to the baseline hub is 30% for both experiment and CFD. Lift (download) on the downstream horizontal stabilizer is predicted within 15%, a difference most likely attributable to sidewall modeling. Wing lift time histories for both hubs compare poorly with data, and the frequency content is lacking in many instances. The computed phaseaveraged time histories of wing lift are investigated for convergence. Notably, DES turbulence modeling showed no significant improvement over more cost-effective RANS. Overall, additional research is needed to confirm the ability of high-fidelity computational tools and hybrid RANS/LES turbulence models to predict quantitative details of long age hub wake interactions on rotorcraft empennages.
Design of Composite Materials for Improved Loss-of-Lubrication Survivability of Hybrid Rotorcraft Gears
Authors:   Pennsylvania State University, Waller Matthew , Koudela Kevin , McIntyre Sean
Published: July 2023

Hybrid gears featuring steel teeth mated to a composite body provide the potential for significant weight savings in aerospace applications such as rotorcraft and geared turbofan engines. For hybrid gears to be viable for use in these applications, they must not degrade mechanical performance or thermal characteristics, particularly under loss-oflubrication operation. The heat generated by loss-of-lubrication operation may be especially problematic for the fiberreinforced polymer composite materials used in hybrid steel-composite gear prototypes. Initial hybrid gear design and testing is described in the literature, but no prior studies have investigated optimization of the composite material for thermal performance. In the study presented herein, conductive fibers and high-temperature polymers are introduced to make a composite material better suited to high-temperature and loss-of-lubrication. Channel-flow resin transfer molding was used to fabricate composites with a variety of configurations, including hybrid reinforcement alternating highly-conductive pitch-based carbon fiber plies with typical high-strength polyacrylonitrile (PAN)-based carbon fiber plies. Performance was evaluated by thermal conductivity measurement and compression strength testing. Finite element modeling was performed to quantify strength and stiffness requirements for the composite gear web and to investigate the effects of using plies of different stiffness in a hybrid laminate. Results of this study show that the in-plane thermal conductivity of composite laminates can be greatly increased by using hybrid reinforcement, but the hybrid gear web design must account for the low compression strength of the hybrid reinforcement to ensure that the structural integrity of the composite gear web is not compromised.
Optimal choice of stapler and digestive tract reconstruction method after distal gastrectomy for gastric cancer: A prospective case–control study
Authors: Wu Zhen , Zhou Zhi-Gang , Li Ling-Yu , Gao Wen-Jing , Yu Ting
Published: July 2023

Obstructive jaundice (OJ) is a common problem in daily clinical practice. However, completely understanding the pathophysiological changes in OJ remains a challenge for planning current and future management. The effects of OJ are widespread, affecting the biliary tree, hepatic cells, liver function, and causing systemic complications. The lack of bile in the intestine, destruction of the intestinal mucosal barrier, and increased absorption of endotoxins can lead to endotoxemia, production of proinflammatory cytokines, and induce systemic inflammatory response syndrome, ultimately leading to multiple organ dysfunction syndrome. Proper management of OJ includes adequate water supply and electrolyte replacement, nutritional support, preventive antibiotics, pain relief, and itching relief. The surgical treatment of OJ depends on the cause, location, and severity of the obstruction. Biliary drainage, surgery, and endoscopic intervention are potential treatment options depending on the patient's condition. In addition to modern medical treatments, Traditional Chinese medicine may offer therapeutic benefits for OJ. A comprehensive search was conducted on PubMed for relevant articles published up to August 1970. This review discusses in detail the pathophysiological changes associated with OJ and presents effective strategies for managing the condition.
Combined and intraoperative risk modelling for oesophagectomy: A systematic review
Authors: Grantham James Paul , Hii Amanda , Shenfine Jonathan
Published: July 2023

Obstructive jaundice (OJ) is a common problem in daily clinical practice. However, completely understanding the pathophysiological changes in OJ remains a challenge for planning current and future management. The effects of OJ are widespread, affecting the biliary tree, hepatic cells, liver function, and causing systemic complications. The lack of bile in the intestine, destruction of the intestinal mucosal barrier, and increased absorption of endotoxins can lead to endotoxemia, production of proinflammatory cytokines, and induce systemic inflammatory response syndrome, ultimately leading to multiple organ dysfunction syndrome. Proper management of OJ includes adequate water supply and electrolyte replacement, nutritional support, preventive antibiotics, pain relief, and itching relief. The surgical treatment of OJ depends on the cause, location, and severity of the obstruction. Biliary drainage, surgery, and endoscopic intervention are potential treatment options depending on the patient's condition. In addition to modern medical treatments, Traditional Chinese medicine may offer therapeutic benefits for OJ. A comprehensive search was conducted on PubMed for relevant articles published up to August 1970. This review discusses in detail the pathophysiological changes associated with OJ and presents effective strategies for managing the condition.
Ludzie na łamach „Gazety Kaliskiej” – przyczynek do badań biograficznych Kalisza i regionu
Authors: Walczak-Niewiadomska Agata
Published: July 2023

Local magazines in the 19th century played a significant informative role in the community, publishing news important for the inhabitants of a given city and region, and at the same time bringing their audience closer to the “big world” by informing about selected events from many countries. Therefore, it is understandable that within the diverse, but usually constant columns, many names appeared – people both distinguished in many fields for Kalisz, as well as those unknown to a wider group – actors of just one mention. The aim of this article is to draw attention to the value of analyzing the content of a local magazine in terms of personal information and the role that the list of all names published in the magazine at the turn of 19th and 20th century can play in a historical research.
Utracone – odzyskane. Zbiory dawnego Muzeum Ziemi Kaliskiej w kolekcji Muzeum Okręgowego Ziemi Kaliskiej w Kaliszu. Zarys problematyki
Authors: Tabaka Anna
Published: July 2023

The authoress presents the history of creation and indyvidual departments of the Kalisz Lan District Museum in Kalisz, with particular emphasis on their oldest parts, i.e. artefacts collected in the pre-war Kalisz Land Museum. She proves that the basis of the institution’s collection is the old (pre-war) legacy – lost, but partially recovered after World War II. The resercher presents the topic on examples, outlining possibile directions for provenance research.
The Perceived Heads of Departments’ Infusion of Ubuntu Values in Curriculum and Knowledge Sharing Leadership in Under-Resourced Public Schools
Authors: Nkambule Bongani Innocent
Published: July 2023

The article reports on the findings of a qualitative inquiry involving a sample of nine (9) teachers (three participants per school) drawn from three schools within the locality of three education circuits of Emalahleni in Mpumalanga Province (South Africa). The primary objective of the article was informed by the paucity of literature that establishes an intersection between Indigenous epistemologies of Ubuntu philosophy, instructional leadership and the sharing process of knowledge management within the domain of primary and secondary education. By eliciting teachers’ views on heads of departments’ (HODs’) curriculum leadership practices, the article attempts to narrow down the knowledge gap on the topic of instructional (herein referred to as curriculum) leadership— a domain whose preoccupation often slants towards the principal’s role at the exclusion of other key stakeholders within the school ecology. In terms of the findings, democratic (participative), autocratic, transactional, transformational and managerial (in no particular order) leadership styles were found to have been used by individual HODs alongside instructional leadership style to strengthen their curriculum leadership role. It however, became apparent that both participative and transformational leadership styles sufficiently promoted the ethos of Ubuntu in HODs’ curriculum leadership role and thus enhanced curriculum delivery processes and knowledge sharing behavior among teachers as well as between HODs and teachers. The findings of the article demonstrate how a non-adversarial intersection between indigenous and mainstream leadership practices, might add an impetus to HODs’ curriculum delivery and knowledge sharing leadership role in under-resourced schooling contexts.