bluuebunny/crossref_metadata_2025 huggingface dataset:
Prävention, Diagnostik, Therapie und Nachsorge des Lungenkarzinoms
Authors: Schütte Wolfgang , Gütz Sylvia , Nehls Wiebke , Blum Torsten Gerriet , Brückl Wolfgang , Buttmann-Schweiger Nina , Büttner Reinhard , Christopoulos Petros , Delis Sandra , Deppermann Karl M. , Dickgreber Nikolas , Eberhardt Wilfried , Eggeling Stephan , Fleckenstein Jochen , Flentje Michael , Frost Nikolaj , Griesinger Frank , Grohé Christian , Gröschel Andreas , Guckenberger Matthias , Hecker Erich , Hoffmann Hans , Huber Rudolf M. , Junker Klaus , Kauczor Hans-Ulrich , Kollmeier Jens , Kraywinkel Klaus , Krüger Marcus , Kugler Christian , Möller Miriam , Nestle Ursula , Passlick Bernward , Pfannschmidt Joachim , Reck Martin , Reinmuth Niels , Rübe Christian , Scheubel Robert , Schumann Christian , Sebastian Martin , Serke Monika , Stoelben Erich , Stuschke Martin , Thomas Michael , Tufman Amanda , Vordermark Dirk , Waller Cornelius , Wolf Jürgen , Wolf Martin , Wormanns Dag
Published: October 2023

Die aktuelle Fassung der Leitlinie Lungenkarzinom trägt der Dynamik der Informationen in diesem Fachbereich Rechnung. Insbesondere gelten folgenden Empfehlungen:

Die Vorstellung aller neu diagnostizierten Patienten im interdisziplinären pneumoonkologischen Tumorboard ist verpflichtend, das CT-Screening für asymptomatische Risikopersonen (nach Zulassung durch die Behörden), Vorgehen beim inzidentellen Lungenrundherd (außerhalb von Screeningprogrammen), molekulare Testung aller NSCLC unabhängig vom Subtyp, in frühen Stadien auf EGFR-Mutationen und in der Rezidivsituation, adjuvante TKI-Therapie bei Vorliegen einer EGFR-Mutation, adjuvante Konsolidierung mit Checkpointinhibitor bei PD-L1 ≥ 50%, Erhebung des PD-L1-Status, nach Radiochemotherapie bei PD-L1-pos. Tumoren Konsolidierung mit Checkpointinhibitor, adjuvante Konsolidierung mit Checkpointinhibitor bei PD-L1 ≥ 50% im Stadium IIIA, Erweiterung des therapeutischen Spektrums bei PD-L1 ≥ 50%, unabhängig von PD-L1Status, neue zielgerichtete Therapieoptionen sowie die Einführung der Immunchemotherapie in der SCLC Erstlinie.

Um eine zeitnahe Umsetzung künftiger Neuerungen zu gewährleisten, wurde die Umstellung auf eine „living guideline“ für das Lungenkarzinom befürwortet.
Outcomes of the Endoscopic Endonasal Approach for the Treatment of Clival Chordomas: A Single-Center Experience
Authors: Alsayed Ahmed , Alrasheed Abdulaziz S. , Aljabab Saif , Alshareef Mohammad , Yahya Buthaina Jaber , Alharbi Abdulmajeed , Alroqi Ahmad , Albaharna Hussain , Alromaih Saud , Alayed Yasir , Alqurashi Ashwag , Alsaleh Saad , Ajlan Abdulrazag
Published: October 2023

Objective Chordoma is a low-grade malignant tumor that originates from the remnant tissue of the embryonic notochord. Postoperative or definitive radiotherapy (RT) has been used to enhance local control. This study aims to assess the outcomes of the expanded endoscopic endonasal approach (EEA) for maximal removal of clival chordomas followed by RT for visualized residual or tumor recurrence.

Materials and Methods A retrospective review was performed on consecutive patients with clival chordoma who underwent endoscopic endonasal resection in the otorhinolaryngology and neurosurgery departments, between 2016 and 2021. We included all patients with pathologically confirmed clival chordoma who were treated using the EEA. Patients who underwent combined external and endoscopic approaches or transcranial surgery were excluded.

Results Seventeen patients were included in this study. Most of them had tumors located in the middle clivus. Regarding RT, the majority of patients underwent postoperative RT. Almost half of them underwent CyberKnife (CK) RT. None of them had severe toxicities (grade 3 or higher). Three patients died, resulting in a mortality rate of 17.6% none of them related to radiation side effect. The 2-year overall survival was 82.4% (mean standard error [SE] = 1.765, 95% confidence interval [CI] = 1.505–2.024), and the progression-free survival (PFS) was 76.5% (mean SE = 3.403, 95% CI = 2.791–4.016). No distal metastasis was reported in our series.

Conclusion This series demonstrates that expanded endoscopic endonasal approach (EEA) for the resection of skull base chordomas, followed by CyberKnife radiosurgery, presents a viable alternative to proton beam therapy; however, further research is necessary to directly compare these modalities.
A Controlled Trial Comparing One-Year Hemodynamics of Two Bovine Pericardial Valves
Authors: Sohn Suk Ho , Kang Yoonjin , Kim Ji Seong , Choi Jae Woong , Lee Jae Hang , Kim Jun Sung , Lim Cheong , Hwang Ho Young
Published: October 2023

Background This randomized controlled trial was designed to compare 1-year hemodynamic performances and clinical outcomes after aortic valve replacement (AVR) using a recently introduced (the AVALUS group) and worldwide used (the CEPME group) bovine pericardial bioprostheses.

Methods Patients were screened to enroll 70 patients in each group based on a noninferiority design. The primary endpoint of the trial was the mean pressure gradient across the aortic valve (AVMPG) at 1 year after surgery. One-year echocardiographic data were obtained from 92.1% (129 of 140 patients) of the study patients.

Results There were no differences in baseline characteristics, including sex and body surface area (1.64 ± 0.18 vs. 1.65 ± 0.15 m2) between the groups. The AVMPG on 1-year echocardiography was 14.0 ± 4.3 and 13.9 ± 5.1 mmHg in the AVALUS and CEPME groups, respectively (the p-value for noninferiority was 0.0004). In the subgroup analyses for the respective size of the prostheses, AVMPG of the 19-mm prostheses was significantly lower in the AVALUS group than in the CEPME group (14.0 ± 4.3 vs. 20.0 ± 4.7 mmHg, p = 0.012), whereas those of the other sizes were not significantly different between the two groups. There were no significant differences in the effective orifice area (1.49 ± 0.40 vs. 1.53 ± 0.38 cm2, p = 0.500) or effective orifice area index (0.91 ± 0.22 vs 0.93 ± 0.23 cm2/m2, p = 0.570) in all the patients, or in the subgroup analysis for the 19-mm prosthesis. There were no differences in the 1-year clinical outcomes between the two groups.

Conclusion The 1-year hemodynamic and clinical outcomes of the AVALUS group were noninferior to those of the CEPME group (NCT03796442).
New Insights into Mortality-Related Risk Factors in Infective Endocarditis: Results from the Brandenburg State Endocarditis Register
Authors: Ostovar Roya , Schroeter Filip , Seifi Zinab Frarzane , Fritzsche Dirk , Minden Hans-Heinrich , Lasheen Nirmeen , Hartrumpf Martin , Ritter Oliver , Dörr Gesine , Albes Johannes Maximilian
Published: October 2023

Objective Endocarditis as a potentially life-threatening disease with high complication and mortality rates. In recent years, an increase in the incident of endocarditis has been reported throughout Europe. In the aging society, successful treatment is complex and challenging owing to the high rate of multimorbidity.

Methods We initiated a statewide prospective multicenter endocarditis registry in 2020. Perioperative risk factors, comorbidities, microbiological, laboratory and imaging diagnostics, complications, and mortality including 1-year follow-up were collected. The present midterm analysis includes factors influencing mortality in the first 313 patients.

Result In-hospital mortality and 1-year mortality were 28.4 and 40.9%, respectively. Preoperative risk factors include age (p < 0.001), EuroSCORE II (p < 0.001), coronary artery disease (p = 0.022), pacemaker probe infection (p = 0.033), preoperative left ventricular ejection fraction (LVEF), systemic inflammatory response syndrome (SIRS), pulmonary edema, heart failure, septic emboli, acute renal failure, impaired coagulation, hypalbuminemia (p < 0.001), and N-terminal prohormone of brain natriuretic peptide (NTproBNP) (p = 0.001). The presence of peri-annular abscess, perforation, and shunt were associated with increased mortality (p = 0.004, 0.001, and 0.004, respectively). In addition, cardiopulmonary bypass time influenced mortality (p = 0.002). The main postoperative causes of death were multi-organ failure, renal failure, vasoplegia, and low-output syndrome (p < 0.001). Previous endocarditis was 7.7%, while 35.5% were prosthetic valve recipients and 33.6% were redo surgeries.

Conclusion Our first registry data show the complexity of endocarditis patients and the challenging treatment. Some risk factors can be treated preoperatively. For instance, hypalbuminemia and the duration of the procedure can be controlled with adequate albumin substitution and carefully planned procedures restricted to the essential requirements, that is, hybrid approaches with consecutive interventions.
A Novel Autosomal Recessive Candidate Gene Responsible for RASopathy-Like Phenotype and Bone Marrow Failure: RASA3
Authors: Ayaz Akif , Doğru Zeynep , Kök Kıvanç , Bayram Nihan , Yaman Yöntem , Köseoğlu Abdullah Hüseyin , Yiğitbaşı Türkan , Öztürk Demir Aslı Güner , Yüksel Elçin , Dundar Burcu , Çaralan Erdal Fırat , Nepesov Serdar , Elli Murat
Published: October 2023

Although many genetic etiologies, such as Fanconi anemia, Shwachman–Diamond syndrome, dyskeratosis congenita, and Diamond–Blackfan anemia, from hereditary bone marrow failure are known today, the responsible gene remains unknown in a significant part of these patients. A 6-year-old girl, whose parents were first-cousin consanguineous, was referred to the pediatric hematology department due to growth retardation, thrombocytopenia, neutropenia, and anemia. The patient had low-set ears, pectus excavatum inferiorly, and cafe-au-lait spots. In whole-exome analysis, p.K385T (c.1154A > C) variant in the RASA3 gene was detected as homozygous. The amino acid position of the alteration is located in the conserved and ordered region, corresponding to the Ras GTPase activation domain (Ras-GAP) in the center of the protein. Importantly, most of in silico prediction tools of pathogenicity predicts the variant as damaging. RASopathies, which are characterized by many common clinical findings, such as atypical facial features, growth delays, and heart defects, are a group of rare genetic diseases caused by mutations in the genes involved in the Ras-MAPK pathway. The findings in this patient were consistent with the RASopathy-like phenotype and bone marrow failure. Interestingly, enrichment of RASopathy genes was observed in the RASA3 protein–protein interaction network. Furthermore, the subsequent topological clustering revealed a putative function module, which further implicates RASA3 in this disease as a novel potential causative gene. In this context, the detected RASA3 mutation could be manifesting itself clinically as the observed phenotype by disrupting the functional cooperation between the RASA3 protein and its interaction partners. Relatedly, current literature also supports the obtained findings. Overall, this study provides new insights into RASopathy and put forward the RASA3 gene as a novel candidate gene for this disease group.
Multiple measurements of CEOs’ overconfidence and future earnings management: evidence from Asia-Pacific developing countries
Authors: Sumiyana Sumiyana , Na’im Ainun , Nugroho Albertus H. L. , Kurniawan Firdaus
Published: October 2023

This study investigates the association between CEOs’ overconfidence and future earnings management. This research is designed to explain CEOs’ overconfidence with the serial logic of self-confidence and self-identity in constructing their overconfidence. The authors demonstrate the CEOs’ overconfidence using multiple measures exploratorily that criticise their behaviour to manage their firms’ earnings aggressively. The authors collected data from the Bureau Van Dijk and Refinitiv Thomson Reuters databases. They identified manufacturing firms listed on the stock exchanges of Singapore (SSE), Malaysia (KLSE), Thailand (SET), the Philippines (PSE), Indonesia (IDX), Vietnam (HOSE), Pakistan (PSE); Taiwan (TSEC); India (NSE) and China (SSE). They categorised developing countries as lower-middle and upper-middle-income. This study used Generalised Least-Square (GLS) regression to test all the hypotheses. This study finds this association robust in an international setting for developing countries. In other words, it shows some extant research that most CEOs in developing countries would intentionally like to manage future earnings. Furthermore, it identifies developing countries with lower-middle incomes and less competition due to emerging capital markets. Then, it highlights that CEOs in developing countries tend to be overconfident because of cognitive behaviour. Moreover, these CEOs assemble an organisational culture that can easily improve prospective performance. Therefore, this study infers that economic uncertainty causes CEOs to be overconfident, enhancing their boldness when managing earnings excessively. This study presents a novelty supported by three critical reasoning arguments. First, it explains the phenomenon of CEOs’ overconfidence through self-confidence (self-control). Second, the authors develop multiple measurements used in the study to mark the CEOs’ overconfidence as a combined product of self-confidence and self-identity. It uses capital expenditures to measure the CEOs’ overconfidence and firm overinvestment, the incremental debt-to-equity ratio, historical earnings persistence, historical stock price persistence, the magnitude of the related party’s transactions and political connections. Third, this study investigates CEOs’ overconfidence in an international setting.
Direct implicit and explicit energy-conserving particle-in-cell methods for modeling of capacitively coupled plasma devices
Authors: Sun Haomin , Banerjee Soham , Sharma Sarveshwar , Powis Andrew Tasman , Khrabrov Alexander V. , Sydorenko Dmytro , Chen Jian , Kaganovich Igor D.
Published: October 2023

Achieving large-scale kinetic modeling is a crucial task for the development and optimization of modern plasma devices. With the trend of decreasing pressure in applications, such as plasma etching, kinetic simulations are necessary to self-consistently capture the particle dynamics. The standard, explicit, electrostatic, momentum-conserving particle-in-cell method suffers from restrictive stability constraints on spatial cell size and temporal time step, requiring resolution of the electron Debye length and electron plasma period, respectively. This results in a very high computational cost, making the technique prohibitive for large volume device modeling. We investigate the direct implicit algorithm and the explicit energy conserving algorithm as alternatives to the standard approach, both of which can reduce computational cost with a minimal (or controllable) impact on results. These algorithms are implemented into the well-tested EDIPIC-2D and LTP-PIC codes, and their performance is evaluated via 2D capacitively coupled plasma discharge simulations. The investigation reveals that both approaches enable the utilization of cell sizes larger than the Debye length, resulting in a reduced runtime, while incurring only minor inaccuracies in plasma parameters. The direct implicit method also allows for time steps larger than the electron plasma period; however, care must be taken to avoid numerical heating or cooling. It is demonstrated that by appropriately adjusting the ratio of cell size to time step, it is possible to mitigate this effect to an acceptable level.
Effect of mainstream oscillation on instantaneous behaviors for film cooling with different trench heights
Authors: Ma Liwei , Yao Ran , Chen Jinfu , Song Wei , Su Hang , Wang Jianhua
Published: October 2023

Mainstream oscillation is inevitable in the practical gas turbine running environment. To study the effects of different oscillation configurations on instantaneous film cooling performance, a series of large eddy simulations are performed in this work. Time-solved experiments are carried out to validate the numerical methodology. Through the analyses of time-averaged characteristics, it is concluded that with the enhancement of oscillation intensity, the anti-counter rotating vortex pair gradually disappears, and the pattern of counter rotating vortex pair is also changed, which leads to a significant variation in time-averaged film effectiveness. The analyses of film cooling instability show that without mainstream oscillation, the local unsteadiness distributes as two symmetrical bands, which is resulted from the trajectory of the symmetrical vortical structure. With the introduction of mainstream oscillation, these two bands gradually disappear, and the level of cooling instability increases significantly with the oscillation amplitude and frequency. By statistical analyses, it shows that under heavily oscillated mainstream, the probabilities of transient film effectiveness approaching 0 or 1 increase, which implies that the events of non-coverage and full film coverage tend to happen frequently. In addition, the design with a larger trench height is beneficial, because it can increase the time-averaged cooling effectiveness, and at the same time, the unsteadiness still keeps at the same levels under the same conditions of mainstream oscillation.
Decomposition mechanism of clean air based on ReaxFF molecular dynamics simulation and quantum chemical calculation
Authors: Zhao Danchen , Yan Jing , He Ruixin , Lu Lei , Geng Yingsan , Liu Zhiyuan
Published: October 2023

SF6 is widely used in gas switchgear but has a strong greenhouse effect. The development of an environment-friendly switchgear that can replace SF6 is a current research hotspot. As a SF6 alternative technology, vacuum arc-extinguishing chamber plus clean air insulation has shown high application prospects. The clean air inside the switchgear decomposes under the effect of high temperature and discharge; however, only a few studies focused on its decomposition mechanism. In this work, the decomposition mechanism of clean air and the effect of temperature on the decomposition are simulated at the atomic level based on ReaxFF (Reactive force field) molecular dynamics and quantum chemistry theory. Results showed that the decomposition of clean air mainly generates NO, NO2, and N2O. NO is the main product at high temperatures and thus can be the characteristic decomposition product of clean air. The clean air has good self-recovery characteristics, and its decomposition can be substantially promoted by increasing the temperature. The decomposition rates of N2 and O2 under 3000 K can reach 7.00% and 8.00%, respectively, which are twice and four times those under 2000 K. These results can provide theoretical basis and engineering guidance for the development of environment-friendly switchgear with vacuum arc-extinguishing chamber plus clean air insulation.
Adherence to WHO’s terminology?
Authors: Moreno Albert Morales
Published: October 2023

What happens when terms are used, translated and coined under the pressure of a global pandemic? By analyzing ad hoc corpora from the leaders of the World Health Organization (WHO), European Commission (EC), Spain and France, as well as Spanish and French press, this corpus-based study aims to identify the extent to which the WHO influenced and contributed to the standardization of COVID-19-related terminology in French and Spanish during the pandemic.

Publicly available speeches from January 1, 2020 to September 30, 2021 delivered by these four institutional leaders were compiled and analyzed using corpus linguistics techniques. Use frequencies in the media provide contrasting data on term use in selected French and Spanish newspapers.

Results indicate that terminological variation was less pronounced for more established terminology and more widespread for terms coined during COVID-19. Furthermore, in some cases the analyzed supranational and national institutions and the press failed to adopt standardized WHO terminology. The study concludes that national institutions and the press did not rise to their potential as agents for the standardization and harmonization of WHO’s COVID-19-related terminology.
Relaxation approach for learning neural network regularizers for a class of identification problems
Authors: Court Sébastien
Published: October 2023

The present paper deals with the data-driven design of regularizers in the form of artificial neural networks, for solving certain inverse problems formulated as optimal control problems. These regularizers aim at improving accuracy, wellposedness or compensating uncertainties for a given class of optimal control problems (inner-problems). Parameterized as neural networks, their weights are chosen in order to reduce a misfit between data and observations of the state solution of the inner- optimal control problems. Learning these weights constitutes the outer-problem. Based on necessary first-order optimality conditions for the inner-problems, a relaxation approach is proposed in order to implement efficient solving of these inner-problems, namely the forward operator of the outer-problem. Optimality conditions are derived for the latter, and are implemented in numerical illustrations dealing with the inverse conductivity problem. The numerical tests show the feasibility of the relaxation approach, first for rediscovering standard L
2-regularizers, and next for designing regularizers that compensate unknown noise on the observed state of the inner-problem.
Reentrant canonical spin-glass dynamics and tunable field-induced transitions in (GeMn)Co2O4 Kagomé lattice
Authors: Singha A D , Pramanik P , Joshi D C , Ghosh S , Jena S K , Tiwari P , Sarkar T , Thota S
Published: October 2023

We report on the reentrant canonical semi spin-glass characteristics and controllable field-induced transitions in distorted Kagomé symmetry of (GeMn)Co2O4. This B-site spinel exhibits complicated, yet interesting magnetic behaviour in which the longitudinal ferrimagnetic (FiM) order sets in below the Néel temperature T
FN ∼ 77 K due to uneven moments of divalent Co (↑ 5.33 μ
B) and tetravalent Mn (↓ 3.87 μ
B) which coexists with transverse spin-glass state below 72.85 K. Such complicated magnetic behaviour is suggested to result from the competing anisotropic superexchange interactions (J
AB/k
B ∼ 4.3 K, J
AA/k
B ∼ −6.2 K and J
BB/k
B ∼ −3.3 K) between the cations, which is extracted following the Néel’s expression for the two-sublattice model of FiM. Dynamical susceptibility (χ
ac (f, T)) and relaxation of thermoremanent magnetization, M
TRM (t) data have been analysed by means of the empirical scaling-laws such as Vogel–Fulcher law and Power law of critical slowing down. Both of which reveal the reentrant spin-glass like character which evolves through a number of intermediate metastable states. The magnitude of Mydosh parameter (Ω ∼ 0.002), critical exponent zυ = (6.7 ± 0.07), spin relaxation time τ
0 = (2.33 ± 0.1) × 10−18 s, activation energy E
a/k
B = (69.8 ± 0.95) K and interparticle interaction strength (T
0 = 71.6 K) provide the experimental evidences for canonical spin-glass state below the spin freezing temperature T
F = 72.85 K. The field dependence of T
F obtained from χ
ac (T) follows the irreversibility in terms of de Almeida–Thouless mean-field instability in which the magnitude of crossover scaling exponent Φ turns out to be ∼2.9 for the (Ge0.8Mn0.2)Co2O4. Isothermal magnetization plots reveal two field-induced transitions across 9.52 kOe (H
SF1) and 45.6 kOe (H
SF2) associated with the FiM domains and spin-flip transition, respectively. Analysis of the inverse paramagnetic susceptibility

χ

p

−
1

χ

p

=
χ
−

χ
0

after subtracting the temperature independent diamagnetic term

χ
0

(=−3 × 10−3 emu mol−1 Oe−1) results in the effective magnetic moment

μ

eff

= 7.654 μ
B/f.u. This agrees well with the theoretically obtained

μ

eff

= 7.58 μ
B/f.u. resulting the cation distribution

Mn

0.2

4
+

↓

A

[

Co

2

2
+

↑

]
B

O

4

in support of the Hund’s ground state spin configuration

S
=
3

/

2

and

S
=

 

1

/

2

of Mn4+ and Co2+, respectively. The H–T phase diagram has been established by analysing all the parameters (T
F(H), T
FN(H), H
SF1(T) and H
SF2(T)) extracted from various magnetization measurements. This diagram enables clear differentiation among the different phases of the (GeMn)Co2O4 and also illustrates the demarcation between short-range and long-range ordered regions.
Incipient fault feature extraction of rolling element bearings based on SOSO boosting technique and improved energy operator
Authors: Wang Yan , Li Jiabo , Bu Penghui , Ye Min
Published: October 2023

The incipient fault features of rolling element bearings (REBs) are easily overwhelmed by environmental noise and vibration interference. Therefore, this paper proposes a novel fault feature extraction method for REBs based on a SOSO (Strengthen-Operate denoising-Subtract-Strengthen) boosting technique. Firstly, an improved fast non-local mean filtering (IFNLM) algorithm is proposed by improving the similarity measure and kernel function while reducing the amount of weight calculation based on distance symmetry. Secondly, a SOSO_IFNLM boosting filtering structure is constructed to reduce the noise of the original vibration signal and enhance the early faint fault pulse. Finally, a k-value improved symmetric higher-order frequency-weighted energy operator (k-SHFWEO) is proposed to detect the bearing fault features from denoised signals. The effectiveness and feasibility of the proposed SOSO_IFNLM-k-SHFWEO method are numerically and experimentally investigated. The results demonstrate that the proposed method has better fault feature extraction capability for early weak faults of REBs and higher efficiency compared to other popular methods.
Semi-supervised diagnosis method for coupling faults of key rotating components based on EEMD-KPCA under cross working conditions
Authors: Yuyan Zhang , Yafeng Zhang , Hao Li , Wuyi Ming , Wenliao Du , Xiaoyu Wen , Yongqi Zhang , Lingdi Yan
Published: October 2023

To address the challenges of extracting coupled fault features from key rotating components and classifying them under changeable operating conditions, a semi-supervised fault diagnosis method is proposed. First, Ensemble Empirical Mode Decomposition and Kernel Principal Component Analysis are employed to decompose the original coupled fault signals and reduce feature dimensionality. Experiments are conducted on labeled datasets, yielding an average classification accuracy of 92.43%. To further classify unlabeled datasets under various working conditions, a probability distribution estimation function is incorporated and a confidence threshold is set. For unlabeled data with probabilities greater than the confidence threshold, a pseudo-label is added to increase the labeled data quantity. Thus, it makes learning from these unlabeled data possible. A comparison with the other three methods under cross working conditions showcases the superiority of the proposed approach.
Influence of strong Coulomb coupling on diffusion in atmospheric pressure plasmas
Authors: Acciarri M D , Moore C , Baalrud S D
Published: October 2023

Ion diffusion in atmospheric pressure plasmas is examined and particular attention is paid to the fact that ion–ion interactions can be influenced by strong Coulomb coupling. Three regimes are identified. At low ionization fractions (

x
i

≲

10

−
6

), standard weakly correlated ion-neutral interactions set the diffusion rate. At moderate ionization fractions (

10

−
6

≲

x

i

≲

10

−
2

) there is a transition from ion-neutral to ion–ion collisions setting the diffusion rate. In this regime, the effect of strong Coulomb coupling in ion–ion collisions is accounted for by applying the mean force kinetic theory. Since both ion-neutral and ion–ion interactions contribute a comparable amount to the total diffusion rate, models (such as particle-in-cell or fluid) must account for both contributions. At high ionization fractions (

x

i

≳

10

−
2

), strongly correlated ion–ion collisions dominate and the plasma is heated substantially by a disorder-induced heating (DIH) process associated with strong correlations. The temperature increase due to DIH strongly influences the ion diffusion rate. This effect becomes even more important, and occurs at lower ionization fractions, as the pressure increases above atmospheric pressure. In addition to ion diffusion, DIH affects the neutral gas temperature, therefore influencing the neutral diffusion rate. Model predictions are tested using molecular dynamics simulations, which included a Monte Carlo collision routine to simulate the effect of ion-neutral collisions at the lowest ionization fractions. The model and simulations show good agreement over a broad range of ionization fractions. The results provide a model for ion diffusion, on a wide range of ionization fractions and pressures, solely considering the elastic contribution to the diffusion coefficient—as an illustration of how strong Coulomb coupling influences diffusion processes in general.
Analysis of Consolidation Grouting Effect on The Stability of Portal Slope of The Spillway Tunnel in The Bulango Ulu Dam, Gorontalo, Indonesia
Authors: Purwanto A , Indrawan I G B , Setianto A
Published: October 2023

The problem of portal slope instability often occurs caused by the poor lithological conditions composing the slope. During the portal excavation of the outlet spillway tunnel in the Bulango Ulu Dam, the slope failed. The slope was then reinforced by consolidation grouting. The objectives of this research were to characterize the soil and rock masses composing the slope, evaluate the grouting effectiveness by Limit Equilibrium Method (LEM), and recommend an alternative slope reinforcement method. Surface engineering geological mapping, borehole data evaluation, and laboratory testing were conducted to obtain slope stability analysis parameters. The results showed that the slope consisted of diorite having poor to very poor rock masses. After 7 days of grouting, the triaxial test showed that the soil samples had similar cohesion and increased internal friction angle insignificantly, as compared to the soil samples prior to grouting. The LEM analysis indicated that the portal slope was unstable and consolidation grouting did not increase the slope safety factor (Fs) significantly. As the grouting effect may take significantly long, an alternative slope reinforcement method by soil nailing was proposed. The LEM analysis showed that the soil nailing increased the slope Fs from 0.63 to 1.49.
Stability analyses of diversion tunnel portal slopes at the Cidanau Dam, Banten, Indonesia
Authors: Amalia B A R , Wilopo W
Published: October 2023

The inlet and outlet portal slopes of the Cidanau Dam diversion tunnel were designed with 55° and 46° overall slope angles, respectively, based on stability chart method static analyses. However, the performance of tunnel portal slopes under earthquake loads has not been verified whereas the research area is located in a high earthquake hazard zone. This research was conducted to verify the slope performance under static and earthquake load using limit equilibrium (LE) and finite element (FE) methods. The engineering geological mapping and rock cores evaluation showed that both portal slopes comprised four materials: residual soil, very poor-lapilli tuff, poor-lapilli tuff, and fair-tuff breccia. The stability analyses results showed that the designed tunnel portal slopes were in a stable state under static and earthquake loads. The lowest safety factor (FS) values at the inlet section under static and seismic load are 1.9 and 1.24, and at the outlet section are 2.29 and 1.69, respectively. However, the weathered pyroclastic volcanic rocks comprising the slope is required to be protected from severe degradation upon exposure during and after construction. Results of this study are expected to contribute to the safe design of rock slopes in tropical areas, particularly in Indonesia.
Landslide Susceptibility Mapping in Jurangjero and Kampung Villages, Ngawen Sub-District, Gunung Kidul Regency, Special Region of Yogyakarta, Indonesia
Authors: Manyvanh B , Setiawan H
Published: October 2023

Jurangjero and Kampung villages are one of the areas in the Ngawen sub-district, Gunung Kidul Regency, Special Region of Yogyakarta, Indonesia. The research area is located in the Southern Mountain regionally, especially the Baturagung Sub-Zone. This area is part of The Baturagung Hills, dominated by weathered andesite breccia, tuff, sandstone, and limestone. The topography of these hills can be divided into three slopes, 15-30%, 30-45%, and more than 45%. A soil movement event happened in Jurangjero Village, the biggest, on January 15, 2020, which caused heavy damage to people’s homes, road damage, and breaking bridges. Geographic Information System (GIS) and Analytic Hierarchy Process (AHP) model were applied to identify landslide conditioning factors and produce the landslide susceptibility map. Four conditioning factors including slope, lithology, faults to distance, and land use, were combined using ArcGIS 10.8 to create the landslide susceptibility map of the research area. The research area is divided into four landslide susceptibility zone very low, low, moderate, and high, with each zone of 36%, 20%, 41%, and 3%, respectively. A significant percentage (3%) of the research area with high landslide susceptibility is located along the steep slope, showing the landslides’ locations.
Social Vulnerability Analysis to Disaster COVID-19 in Central Java
Authors: Qomariyah N , Mei E T W
Published: October 2023

The COVID-19 disaster has socio-economic impacts in various regions, including Central Java. COVID-19 has the potential to exacerbate social vulnerability due to the limited internal conditions of individuals to survive. This study tries to analyze social vulnerability based on indicators of individual conditions demographically, socio-economically, and the ability to access service facilities which can be exacerbated by the potential danger of COVID-19. This study aims to analyze the level of social vulnerability and the spatial and temporal distribution of the COVID-19 disaster in Central Java. This study uses a quantitative analysis method by calculating Principle Component Analysis (PCA) and Social Vulnerability Index (SoVI) to identify the level of social vulnerability in Central Java. Analysis of the level of the COVID-19 disaster uses cumulative positive case data which is analyzed spatially and temporally using ArcGIS. This study shows that the higher the SoVI value in a region, the higher the level of individual social vulnerability in that region. The results showed that the highest level of social vulnerability to the COVID-19 disaster in Central Java was the cities of Semarang, Cilacap and Banyumas which were influenced by the conditions of individual vulnerability and the number of positive cases of COVID-19.
Understanding Kulon Progo through Historical Maps
Authors: Cahyono A , Susilo B , Wirasanti N , Rahardjo N , Albadara Y O S , Berlyanti M C
Published: October 2023

Kulon Progo Regency, part of the Special Region of Yogyakarta, has undergone political and administrative divisions, thereby leading to a dynamic geographical name change. Presently, this regency does not yet have a database for geographical names, which are part of cultural heritage to reveal historical events. Therefore, this study aims to conduct an inventory of geographical names in the Kulon Progo Regency through multitemporal historical maps and interpret their meanings. The inventory was carried out by digitizing scanned topographic maps stored on the Leiden University repository website and interpreting the meaning of geographical names through dictionaries and history books. Inventory using historical maps is an effective method of revealing past events. The result found that physical geographical names dominated 78 or 54% of villages, with 45%, 35%, and 20% consisting of biotic, non-biotic and topological aspects. Meanwhile, non-physical geographical names comprised 61 villages, incorporating 26%, 8% and 10% social, economic and cultural aspects.
The Utilization of Geographic Information Systems for Settlement Location Determination in Supporting Sustainable Development: Study Case in Sedayu Sub-District, Bantul Regency, DIY
Authors: Nur Awalia N. , Luklu Chusnia D. , Fajar Nugroho S. , Bayu Sekaranom A.
Published: October 2023

The phenomenon of unsuitable settlement becomes a major issue in environmental problems in big cities. The purpose of this study is to provide innovation design recommendations for determining the location of appropriate settlements to realize the implementation of smart cities. The resulting output of this study is an innovation in settlement location determination. The innovation using a geographic information system equipped with a variety of spatially processed information with overlay techniques. The results of the geographic information system process are then extracted into a mobile application design. Study case in Sedayu District show that the area consists of 36.9% of the area is not suitable for analysis; 36.4% of the area is not suitable for use, and 26.7% of the area is suitable for use. Mobile application design in this study called Smart Application for Smart Resident with two main features, My Contribution (KOKU) and Recommendations and Settlement Locations feature. This innovation can help the community by providing information and recommendations for suitable, less suitable, and unsuitable settlement locations. Thus, the existence of the result study can be a consideration of the community in determining the location of settlements by aspects of sustainable development.
Management of Springs in Pluneng Village, Kebonarum, Klaten
Authors: Khasanah N , Purnama S
Published: October 2023

Springs are one of the most important natural resources for some people. Springs are often used as the main water source to meet household needs. In Pluneng Village, Kebonarum District, Klaten Regency, there are two springs that are very important for the surrounding community, namely the Tirtomulyono Spring and the Tirtomulyani Spring. The purpose of this research is to formulate a management strategy for the two springs that is in accordance with the conditions of the area. This research is analytical descriptive using survey method. Collecting data by interviewing local community leaders and field observations. The spring management strategy is to define and analyze the spring protection zone, namely the spring point protection zone, the spring protection zone from contaminants in the form of pathogenic bacteria, and the water catchment area protection zone. In addition, if the two springs will be used for domestic water requirement, treatment should be carried out first because the total coliform bacteria for both springs do not meet the quality standards.
Preliminary study of isotope characteristics of groundwater in karst hydrogeology in Pacitan Regency, East Java
Authors: Anggraeni T , Putra D P E , Taufiq A
Published: October 2023

The Pacitan Karst region is well known to be one of drought area in the Pacitan Regency during the dry season. Consequently, during the dry season, springs from karst system are required as a water source for the daily life. The appearance of these springs are a result and advantage of the karst terrain, which contains potential groundwater resources. The purpose of this study was to investigate the origin and characteristics of spring’s water in the Pacitan karst region based on its isotope concentrations. This research was conducted by collecting groundwater samples from springs, dug wells, bore wells, and rivers in Pacitan Regency and analyzing their 18O and 2H concentrations. Information on the source of groundwater is thought to be necessary for sustainable groundwater protection planning (conservation). According to the results of the investigation, there are four categories of isotope ratio distribution. The pattern of 18O and 2H concentrations in the samples around the Local Meteoric Water Line (LMWL) shows that groundwater originates from the same elevation of the catchment area from where rainwater falls and has the same characteristics as rainwater or meteoric water.
The Study of Air Pressure System and Extreme Rain in The Southern Java Island
Authors: Manuhana R W , Sekaranom A B , Nurjani E
Published: October 2023

Extreme rain can trigger other natural phenomena that can interfere with human activities. Rain phenomenon extremes are common in tropical cyclones. This study aims to characterize the occurrence of extreme rain events concerning the air pressure system on Java Island. This study uses rainfall data from GSMAP MVK Product and Sea Level Pressure (SLP) from NCEP/NCAR Reanalysis. The identification of extreme rain is carried out with pixel detection of the GSMAP precipitation data from 2015 to 2019. The most extreme rain events were then ranked, and ten events with the highest rain rate were selected. The SLP data at the selected extreme rain event was analyzed and plotted as a map. The principal result shows that in the 10 highest extreme rain events, 4 of them occurred due to the influence of low-pressure systems and tropical cyclones. The rest are associated with other climatic phenomena. In conclusion, this study shows that extreme rainfall tends to be associated with low-pressure anomalies over the Indian ocean. However, not all of the low-pressure anomalies were intensified as a tropical cyclone. Therefore, extreme rainfall in Southern Java Island can be developed due to small air pressure differences.
Water Quality of Tirtomulyono and Tirtomulyani Springs, Klaten, Central Java
Authors: Khasanah N , Purnama S
Published: October 2023

Water quality is one aspect that is increasingly being considered in the management of water resources. In addition to the requirements regarding water quality that are more considered, currently there is a tendency for water pollution to occur in several water sources, including springs. The purpose of this study was to evaluate the water quality of the Tirtomulyono and Tirtomulyani springs in Kebonarum District, Klaten Regency, Central Java Province. To determine the condition of the water quality of the Tirtomulyono and Tirtomulyani springs, direct observations and water samples were taken. Direct observations in the field were carried out to determine physical parameters, while water samples were taken for analysis in the laboratory for chemical and biological parameters. The results showed that in terms of physical and chemical parameters, the quality of water in Tirtomulyono and Tirtomulyani springs was good because it met drinking water requirements. according to the Regulation of the Minister of Health No.492/Menkes/Per/IV/2010. However, based on the results of laboratory analysis, the Total Colliform value of the two springs is > 1600 MPN/100 ml even though according to the quality standard the Total Colliform value must be zero, so in terms of the Total Colliform value it does not meet the drinking water requirement.
Urban Risk Assessment in Heritage Area for Developing Resilience Understanding
Authors: Cahyandari Gerarda Orbita Ida , Worosuprojo Suratman , Mardiatno Djati
Published: October 2023

Heritage area is vulnerable to urban development. Risk and resilience were discussed separately, especially in a heritage area. The term urban risk describes the risk in an urban area. Main factors that link urban risk and resilience must be determined sequentially asa strategy to reduce urban risk and improve resilience. This paper was based on field observation and questionnaires distributed in Jeron Beteng Yogyakarta. The first questionnaires collected data from the owners or residents of heritage objects for addressing the basic risks assessment and social-community assessment. The second questionnaire on risk, resilience, and heritage was distributed to the surrounding communities of the heritage objects. The questionnaires were developed as an assessment for quantitative analysis. The scoring analysis revealed the essential roles of the government and the community in controlling urban risk and resilience. The multi-factors and multi-contexts have relations of interdependence and mutuality. Integrating urban risk and resilience must focus on government funds, professional assistance with renovation, and traditional authority. The social, economic, hazard-disaster mitigation, and building aspects are needed in inter-relationship with the factors. Governance factors must be prioritized in the strategy of preservation.
Activity of Lactic Acid Bacteria (LAB) from the intestines of vannamei shrimp (Lithopenaeus vannamei) in inhibiting the growth of Vibrio harveyi
Authors: Bayhaqi A , Insafitri
Published: October 2023

Lactic Acid Bacteria (LAB) is a bacterium that has been widely used as a probiotic because it can inhibit the growth of pathogenic bacteria. Lactic acid bacteria are usually found in the digestive tract of both humans and animals. In this study, isolates of Lactic Acid Bacteria from the intestines of vannamei shrimp (Litopenaeus vannamei) were isolated from traditional ponds in Bangkalan. Antibacterial activity testing was carried out on Vibrio harveyi, and then the suspected isolates of LAB were identified using a biochemical test referring to the book Identification of Cowan and Steel 1992. Isolation of LAB using pour plate using MRS Agar media enriched with CaCO3 1%. Antibacterial activity test using Kirby Baurer method with disc diffusion technique. The results of the characterization of LAB contained in the intestines of vannamei shrimp were obtained as many as four isolates. Antibacterial activity test of LAB against Vibrio harveyi obtained the highest inhibition zone, namely isolate 2 with a diameter of 4.25 ± 1.77 mm, and was included in the weak category because it was less than 5 mm. The results of bacterial identification using biochemical tests showed that the three isolates were bacteria from the genus Pediococcus and one isolate was a bacterium from the genus Gemella.
Application of algorithm model for estimating shallow-water bathymetry in Tidung Island, Seribu Island using sentinel-2A satellite image
Authors: Maulidya Q , Arhatin R E , Susilo S B
Published: October 2023

The comparison and application of log-linear transformed and log-ratio transformed algorithm models to produce shallow marine bathymetry maps on Tidung Island, Seribu Islands, and Jakarta are still not widely studied. This study aims to compare and apply the better algorithm model in mapping shallow water bathymetry on Tidung Island, Seribu Islands. The goodness of fit tests (determination test and chi-squared test) are used to see the level of suitability of the model in mapping shallow water bathymetry. The result shows that there is a tendency for the log-ratio transformed algorithm to be the better model compared to the other algorithm for mapping bathymetry in Tidung Island, Seribu Islands, with a determination value (R2) of 0.58 and a chi-squared (X2) value of 2.08. In contrast, the log-linear transformed model has an R2 value of 0.57 and X2 of 2.17. This result is in accordance with the initial study of ocean color remote sensing (OCRS) development. The log-ratio transformed algorithm is therefore used to map shallow water bathymetry on Tidung Island, Seribu Islands, using the combination of blue, green, and hand a range of 0 – 6 meters.