bluuebunny/crossref_metadata_2025 huggingface dataset:
QT-Zeit – Was fange ich eigentlich damit an?
Authors: Castiglione Alessandro , Odening Katja
Published: April 2020

The assessment of the QT interval has been an integral part of ECG interpretation since the first descriptions of long QT syndrome by Wolff in 1950 and by Jervell and Lange-Nielsen in 1957. The correct measurement of the QT interval as well as a correct interpretation of the causes and of the clinical consequences of a QT prolongation, however, may be difficult even for trained internists and cardiologists. In this review, we give an overview on physiological determinants of cardiac repolarization, its marker in the surface ECG – the QT interval –, methods to correctly assess QT interval duration, causes for pathologically prolonged QT intervals, and resulting clinical consequences. A correct measurement of the QT interval should be performed by using the „tangent method“, excluding possible U waves. A heart rate correction formula should be employed to determine the heart rate corrected QT interval (QTc).

Many factors, which may prolong the QT interval, should be checked whenever a QTc prolongation is observed. These include drugs, electrolyte imbalances, hormonal influence, and comorbidities. The correct management of a patient with (genetically determined) LQTS starts with a risk stratification based on genotype, ECG phenotype, clinical history, age, sex, concomitant diseases, drug therapies, and family history for syncope or sudden cardiac death. The therapeutic approaches for LQTS are multimodal. Prevention is the basis of the therapy and includes avoiding known risk factors / and potentially QT-prolonging drugs, and a pharmacological treatment with non-selective beta blockers. According to the risk profile and to the patient’s lifestyle the implantation of an ICD or a pacemaker should be considered.
„Eine Art kastrierter Direktzugang“ – Update zur Blankoverordnung
Authors: Buchner Ralf
Published: April 2020

Anfang Februar 2020 fand im Rahmen der TheraPro-Fachmesse in Stuttgart eine Podiumsdiskussion zwischen Ärzten und Therapeuten statt. Themenschwerpunkt: die kommende Blankoverordnung und die damit anstehenden Herausforderungen. Ralf Buchner schätzte im Gespräch mit physiopraxis Chancen und Risiken für Therapeuten ein.
Tara Tannin Regulates Pigmentation by Modulating Melanogenesis
Enzymes and Melanosome Transport Proteins Expression
Authors: Villareal Myra O. , Chaochaiphat Thanyanan , Bejaoui Meriem , Sato Kozo , Isoda Hiroko
Published: April 2020

The skin color is imparted by the pigment melanin produced in the melanosomes of
melanocytes, through the catalytic action of melanogenesis enzymes tyrosinase,
tyrosinase-related protein 1, and dopachrome tautomerase. Disruptions in the
melanogenesis process may result to hypopigmentation, as observed in cutaneous
postinflammatory conditions. Here, the bioactivity of tara tannin, specifically
on melanogenesis, was evaluated in vitro using human epidermal
melanocytes (HEM) and B16F10 murine melanoma cells in order to determine the
possibility that it may be used as a treatment against hypopigmentation. The
melanin content of tara tannin-treated B16F10 cells and the expression level of
melanogenesis enzymes and melanosome transport proteins were determined. To
elucidate the underlying mechanism of tara tannin’s effect on
melanogenesis, DNA microarray analysis was performed. Tara tannin significantly
increased melanogenesis in both murine and human pigment cell models by
upregulating melanogenesis-associated enzymes’ (tyrosinase,
tyrosinase-related protein 1, and dopachrome tautomerase) protein and mRNA
expression levels, as well as the melanosome transport proteins (myosin Va and
RAB27A) expression, both attributed to increased microphthalmia-associated
transcription factor (MITF) expression. Global gene expression analysis results
revealed the modulation of genes (p≤0.05; fold-change ≥2.0 and
≤−2.0) that are under the transcriptional regulation of MITF and
genes relevant for MAPK signaling, metabolic pathways, and cell cycle. Tara
tannin has a significant effective melanogenesis-promoting effect, making it a
potential therapeutic agent against hypopigmentation disorders. This is the
first report on the melanogenesis regulatory effect of tara tannin in
vitro.
Aufgaben der Weaning-Zentren im Pandemiefall COVID-19
Authors: Wiesner B. , Bachmann M. , Blum T.-G. , Forchheim S. , Geiseler J. , Kassin A. , Kretzschmar E. , Weber-Carstens S. , Westhoff M. , Witzenrath M. , Grohé C.
Published: April 2020

Die enorme Zunahme von Patienten mit schwerer respiratorischer Insuffizienz aufgrund der COVID19-Pandemie erfordert einen systematischen Ansatz zur Optimierung der Betreuung von beatmeten Patienten. Ein standardisierter Algorithmus namens „SAVE“ wurde in Berlin entwickelt, um Patienten mit COVID-19-Infektion, die eine invasive Beatmung benötigen, zu lenken. Um Bettenkapazitäten auf den Intensivstationen sicherzustellen, muss eine konstante Patientenentlassung gewährleistet sein. Ein strukturierter Entlassungsprozess der Patienten nach der Akutbehandlung ist dringend erforderlich.

In einem nächsten Schritt haben wir einen Triage-Algorithmus entwickelt, um Patienten auf SAVE-Intensivstationen zu identifizieren, die das Potenzial haben, von der Beatmung entwöhnt zu werden und in dafür spezialisierte Einrichtungen zu verlegen. Dieser Prozess ist das POST-SAVE-Konzept.

In der vorliegenden Arbeit werden die Algorithmen dargestellt, einschließlich der Verwendung einer standardisierten digitalen Datenbank, der Verwendung geschulter Lotsen zur Erleichterung der Kommunikation zwischen SAVE-Intensivstationen und Weaningeinheiten und der Etablierung eines prospektiven Datenregisters, um Patienten dauerhaft hinsichtlich ihres Weaningpotenzials reevaluieren zu können.
Effect of Surgical Intervention on Neurologic Recovery in Patients with Central Cord Syndrome
Authors: Du Li , Zhao Shichang , Zhu Zhongsheng , Xue Feng , Zhang Yadong
Published: April 2020

To review the experience of managing central cord syndrome (CCS) surgically, we retrospectively reviewed 71 patients from October 2015 to April 2017. Deteriorating neurologic status with evidence of radiologic compression and spinal instability were absolute indications for surgery. The American Spinal and Injury Association (ASIA) motor scores (AMS) were recorded at the time of admission (aAMS), 3 days postoperatively (3dAMS), 1 month postoperatively(1mAMS), and at final follow-up (fAMS). Analysis of variance was performed to compare 3dAMS, 1mAMS, and fAMS. Surgery was successful in all 71 patients without re-injury of the spinal cord, infection, or other perioperative complications. The postoperative AMS at 3 days, 1 month, and at the final follow-up significantly improved over preoperative scores. ASIA sensory scores at fAMS were significantly better than 3dAMS and1mAMS scores. The ASIA motor and sensory scores at 1mAMS showed no significant improvements compared with the 3dAMS. Therefore, for patients diagnosed with CCS, combined with evidence of radiologic compression and spinal instability, surgery was beneficial in terms of gains in neurologic recovery.
Cognitive Impairment in Children with Arachnoid Cyst of Sylvian Fissure: Does it Justify the Neurosurgical Treatment?
Authors: Kwiatkowska Karolina , Dębicka Magdalena , Maryniak Agnieszka , Kwiatkowski Stanisław
Published: April 2020

This report discusses the relationship between arachnoid cysts (ACs) and cognitive deficits, and we ask if cognitive impairments could justify neurosurgical treatment. In clinical practice, only AC patients with symptoms of intracranial hypertension or focal neurological deficits are referred to surgery. Occasionally, one might assume that nonspecific problems such as impairment of learning, speech, or cognitive functions are caused by an AC and can be improved by surgery. We describe three patients, in which surgery was indicated on the basis of clinical symptoms such as headaches and the size of the cysts. A neuropsychological examination before AC surgery revealed reduced cognitive potential, and the same examination repeated after surgery showed improvement. We have not found any other reason for this change, except for the decompression of the AC.
Percutaneous Transgastric–Transpancreatic Treatment of a Dissecting Splenic Artery Pseudoaneurysm due to Segmental Arterial Mediolysis
Authors: Kumar Pradesh , Chua Jasmine Ming Er , Yeo Jared Jue Ying , Choke Edward Tieng Chek , Sachdeva Pooja
Published: April 2020

Dissecting splenic artery pseudoaneurysm due to segmental arterial mediolysis (SAM) is a rare condition. We describe a case of direct percutaneous transgastric–transpancreatic thrombin injection into a dissecting splenic artery pseudoaneurysm due to SAM. The direct thrombin injection resulted in successful thrombosis of the pseudoaneurysm. At 1-month follow-up, the patient remained well with persistent thrombosis of the pseudoaneurysm.
Applying a Prediction Model for Vaginal Birth after Cesarean to a Latina Inner-City Population
Authors: Nguyen Michelle T. , Hayes-Bautista Teodocia Maria , Hsu Paul , Bragg Christina , Chopin Irving , Shaw Kathryn J.
Published: April 2020

Background The Maternal–Fetal Medicine Units (MFMU) Network developed a prediction model for calculating the likelihood of successful vaginal birth after cesarean (VBAC) in patients undergoing a trial of labor after cesarean (TOLAC). In this prediction model, Latina ethnicity is considered a negative predictive factor for successful VBAC. Subsequent studies have found mixed results regarding VBAC success in Latina ethnicity.

Objective Our aim was to compare the predicted chance of successful VBAC (as calculated using the MFMU prediction model) to actual TOLAC outcomes in a large Latina sample.

Study Design We performed a retrospective cohort study of Latinas who underwent TOLAC at our institution from January 1, 2013 to December 31, 2016. The MFMU prediction model was used to calculate each participant's predicted success, and the participants were then categorized into three groups based on predicted success: low (<35%), moderate (35–65%), and high (>65%). The predicted success rates versus actual outcomes were compared among the three groups.

Results A total of 567 Latinas met inclusion criteria. Successful VBAC occurred in 476 patients (84%). VBAC was achieved in 65.3% of the low predicted success group, 84.4% of the moderate predicted success group, and 91.7% of the predicted high success group. Actual VBAC success rates exceeded the predicted success rates for the low and moderate groups.

Conclusion Our results question whether Latina ethnicity should continue to be considered a negative predictive factor for VBAC success. Our results also suggest that Latinas with a low predicted VBAC success should not necessarily be discouraged from attempting TOLAC.
Lifestyle Advice for Pediatric Migraine: Blaming the Patient, or Evidence Based?
Authors: Gelfand Amy A. , Irwin Samantha L.
Published: April 2020

Children and teenagers with migraine are often advised to live a life of perfect balance—to sleep regularly and well, to eat breakfast each day, to drink plenty of water, and to exercise religiously. The logic is that doing so will decrease their migraine frequency. The corollary that follows is that failing to follow such advice will result in the patient continuing to experience migraine at its current frequency. This opens the door to potentially blaming the patients for their migraine and contributing to migraine stigma. This article reviews the current state of the evidence for each of these behavioral interventions for migraine prevention, and provides the clinician with practical advice for counseling patients.
CORONA-PANDEMIE: In der Krise steckt auch eine Chance
Authors: Gocke Peter
Published: April 2020

Die Corona-Krise hält die Welt seit Wochen fest im Griff.
KOMMENTAR: Sterbehilfeverbot gekippt
Authors: Heeser Alexandra
Published: April 2020

Ende Februar kippte das Bundesverfassungsgericht das Verbot der geschäftsmäßigen Sterbehilfe. Es gebe laut Grundgesetz ein Recht auf selbstbestimmtes Sterben, sagte der Präsident des Bundesverfassungsgerichts, Andreas Voßkuhle, bei der Urteilsverkündung in Karlsruhe. Das schließe die Freiheit ein, sich das Leben zu nehmen und dabei Angebote von Dritten in Anspruch zu nehmen.
CAPITATIONMODELLE: Pauschale Budgets für mehr Flexibilität
Authors: Hissel Yvonne
Published: April 2020

Wenn Leistungserbringer für ein Jahr oder länger im Voraus eine Pro-Kopf-Pauschale pro Versichertem bekommen und davon umso mehr als Gewinn behalten können, je gesünder der Patient bleibt, nennt sich das Capitation. Die Stiftung Münch hat verschiedene Modelle dieses Anreizsystems jetzt analysiert.
KLINIKUNTERNEHMEN: AUF-/ABSTEIGER DES MONATS
Authors: Schmidt Hartmut
Published: April 2020

Börsenexperte Hartmut Schmidt analysiert für kma die Jahresabschlüsse ausgewählter Kliniken
HAUPTSTADTKONGRESS 2020: „Wann ist ein Moonshot-Projekt gescheitert?“
Authors: Dorner Carola
Published: April 2020

Der Hauptstadtkongress nimmt seit jeher die Zukunft der Gesundheitsversorgung vorweg, so auch bei seinem 20. Jubiläum. Auf dem Programm stehen unter anderem Digitalisierung und Robotik, aber auch sogenannte „Moonshot-Projekte“. Wir haben darüber mit Dr. Ingrid Völker und Ulf Fink gesprochen.
CORONA-PANDEMIE: Im Krisenmodus
Authors: Kohrs Jens
Published: April 2020

Es ist seit Wochen ein Agieren mit vielen Unbekannten. Die Corona-Pandemie stellt das deutsche Gesundheitssystem vor seine bisher wohl größte Herausforderung – und schafft eine ungewöhnliche Maßnahme nach der anderen. Versuch einer Chronik der Krise, die noch lange nicht beendet ist.
CORONA IN ITALIEN: „Wenn hier Menschen sterben, dann sterben sie allein“
Authors: Kucera Martin
Published: April 2020

Die Nachrichten senden dramatische Bilder aus Italien. kma hat mit einer Krankenschwester* aus der Hafenstadt Genua gesprochen. Sie arbeitet in einem der größten Krankenhäuser Liguriens und berichtet über die schreckliche Situation, die sie und ihre Kollegen irgendwie bewältigen müssen.
CORONA-IMPFSTOFFFORSCHUNG: Der Wettlauf hat begonnen
Authors: Ehrhardt-Joswig Jana
Published: April 2020

Seit Anfang März ist klar: Die Corona-Pandemie ist nicht zu stoppen. Wissenschaftler auf der ganzen Welt suchen fieberhaft nach einem Impfstoff, der eine weitere und möglicherweise schlimmere Infektionswelle abschwächen könnte. Auch in Deutschland werden aussichtsreiche Impfstoffkandidaten entwickelt.
STREIT UM APPROBATION: Bürokratie verschärft Ärztemangel
Authors: Heeser Alexandra
Published: April 2020

Die Kooperation des Asklepios-Konzerns mit der Pommerschen Medizinischen Universität Stettin (PUM) hatte zum Ziel, aus Deutschland stammenden ärztlichen Nachwuchs auszubilden und für den Einsatz in den Asklepios-Kliniken zu gewinnen – im Brandenburgischen Schwedt, Pasewalk, Lübben und Brandenburg (Havel). Dies droht an bürokratischen Hürden zu scheitern. Die brandenburgischen Kliniken schlagen Alarm und zweifeln am Lösungswillen Brandenburgs.
KRANKENHAUSSANIERUNG: Ein Krankenhaus durch die Insolvenz steuern
Authors: Denkhaus Stefan
Published: April 2020

2017 rollte eine Pleitewelle unter Krankenhausträgern an, die bis heute nicht abgeklungen ist. Insgesamt müssen die deutschen Krankenhäuser 2020 mit Verlusten von mehr als einer Milliarde Euro rechnen. Doch jede Krise ist gleichzeitig die Chance auf einen Neuanfang: So kann eine Insolvenz als wirkungsvolles Sanierungsinstrument dienen.
ZWISCHENRUF AUS DER BRANCHE: Kleinere Krankenhäuser sind auf sich gestellt
Authors: Barth Rico
Published: April 2020

Rico Barth ist Gründer und Geschäftsführer von Cape IT, einem Software-Unternehmen, das sich auf Open Source- und Cloudlösungen fürs IT-Management spezialisiert hat. In seinem Gastkommentar fragt er, was sich seit den medienwirksamen Hackerangriffen auf den DRK-Verbund in Rheinland-Pfalz und im Saarland oder das Klinikum Fürth getan hat und welche Unterstützung Krankenhäuser von politischer Seite brauchen, um Anforderungen an die IT-Sicherheit erfüllen zu können.
HEALTH INNOVATION HUB: Fest verankert in der realen Welt
Authors: Ehrhardt-Joswig Jana
Published: April 2020

Vor einem Jahr startete der Health Innovation Hub im Auftrag des Bundesgesundheitsministeriums mit seiner Arbeit. Zeit für ein Gespräch mit hih-Leiter Jörg Debatin: über Trüffelschweine, die elektronische Patientenakte und darüber, welchen Umgang mit Daten wir uns wünschen.
HEALTH-I AWARD: Preis für die besten digitalen Gesundheitsideen
Authors: Battenfeld Nicole
Published: April 2020

Mit dem Health-i Award unterstützen die Techniker Krankenkasse und das Handelsblatt vielversprechende Innovatoren mit Ideen für digitalen Fortschritt im Gesundheitswesen. Einige der Gewinner haben es bereits in die Regelversorgung geschafft – oder sind nah dran.
SCHLEPPENDE DIGITALISIERUNG: Smarter Warnruf
Authors: Doelfs Guntram
Published: April 2020

Seit 2015 baut sich die Uniklinik Essen zum Smart Hospital um und gilt als Vorreiter der Digitalisierung. In anderen Kliniken kommt die Digitalisierung jedoch teilweise nur schleppend voran. Essens Klinikchef Prof. Jochen A. Werner fordert daher mehr Investitionen in den digitalen Umbau und einen Bundesfonds zur Forschungsförderung.
SEKTORENÜBERGREIFENDES ENTLASSMANAGEMENT: Vom Krankenhaus direkt in die Kurzzeitpflege
Authors: Heeser Alexandra
Published: April 2020

Weil es in Nordrhein-Westfalen (NRW) an Kurzzeitpflegeplätzen mangelt, hat NRW-Gesundheitsminister Karl-Josef Laumann einem Vertrag für die „Kurzzeitpflege im Krankenhaus“ zwischen dem Evangelischen Krankenhaus Mühlheim an der Ruhr (EKM) und den Pflegekassen zugestimmt. kma im Gespräch mit Nils B. Krog über das Modellprojekt, das bundesweit Schule machen könnte.
5. TSB-TAGUNG: Sicherheit braucht Herz und Hirn
Authors: Dolesch Lukas , Thalmayr Maria
Published: April 2020

„Sicherheit ist unsere gemeinsame Verantwortung und Führungsaufgabe – Patientensicherheit ebenso wie untrennbar damit verbunden Mitarbeitersicherheit. Sie herzustellen und zu bewahren braucht Herz und Hirn.“
MEHRWERT DURCH VERNETZUNG: Dosing und Thieme kooperieren für eine bessere AMTS
Authors: Schindler Carola
Published: April 2020

Die Abteilung Klinische Pharmakologie und Pharmako-epidemiologie am Universitätsklinikum Heidelberg pflegt eine umfassende Datenbank mit relevanten Informationen zu den im deutschsprachigen Raum zugelassenen Medikamenten und ihren potenziellen Wechselwirkungen. Diese bildet unter anderem die Grundlage für den cloudbasierten MIA Service von Dosing, der die Kernfunktionalitäten des bewährten AMTS-Systems AiDKlinik® als Webservice zur Verfügung stellt.
BESSERWISSER: Adaptives Lernen
Authors: Bauner Mareike
Published: April 2020

Man stelle sich eine E-Learning-Plattform vor, die immer genau „weiß“, wo die individuellen Stärken und Schwächen des Lernenden liegen, und die den Lerninhalt daraufhin gezielt anpasst. In der nicht nur Fachwissen vermittelt wird, sondern auch Selbstwahrnehmung und Lernverhalten geschult werden. Ein Angebot, das den Nutzer mit Benachrichtigungen immer wieder passgenau einlädt, das eigene Wissen zu überprüfen und auszubauen.
Targeted advertising: documenting the emergence of Gun Culture 2.0 in Guns magazine, 1955–2019
Authors: Yamane David , Yamane Paul , Ivory Sebastian L.
Published: April 2020

This study replicates Yamane, Ivory, and Yamane’s (Gun studies: interdisciplinary approaches to politics, policy, and practice, Routledge, New York, pp. 9–27, 2019) earlier analysis of the rise of self-defense in gun advertisements in The American Rifleman. It uses the same methodological procedures and applies them to a for-profit, general interest firearm magazine that has been continuously published for 65 years: Guns magazine. Like the earlier study, we hypothesize that the center of gravity in US gun culture has evolved over time from “Gun Culture 1.0,” the historic gun culture of hunting and recreational shooting, to “Gun Culture 2.0,” America’s contemporary defensive gun culture, an evolution reflected in the content of gun advertisements. The data show that the predominance of Gun Culture 1.0 themes in advertising persists through the 1980s and into the 1990s, when the center of gravity of gun culture begins to shift decisively toward the Gun Culture 2.0 themes of personal protection/self-defense and concealed carry. This trend continues through the 1990s and 2000s, with the two emphases crossing-over in the 2010s. As reflected in advertising, in addition to other indicators such as self-reported reasons for gun ownership, Gun Culture 2.0 is now America’s dominant and still expanding core gun culture today.
The entropy of stochastic processes based on practical considerations
Authors: Zhou Yangyang , Hu Hanping , Diao Jin , Chen Yitao
Published: April 2020

The limitations of the Shannon entropy and the dynamic Shannon entropy are discussed. They only measure the aleatory uncertainty of stochastic processes. In this paper, based on the practical considerations, an entropy formula for measuring the uncertainty of stochastic processes is proposed, which measures not only the aleatory uncertainty but also the epistemic uncertainty. The uncertainty of the Gaussian process in four different situations is discussed. These works fill the gap between information theory and signal processing and thus can be used as a design guideline for constructing a secure source in the security field.
“It was two hours […] the same old thing and nothing came of it”
Authors: Ní Thuairisg Laoise
Published: April 2020

This chapter describes findings from a qualitative study which focused on the professional experiences of post-primary teachers
working in schools in Gaeltacht areas, regions where Irish is traditionally spoken as a community language. The research aimed to
provide an in-depth analysis of the personal and professional challenges and advantages associated with the role of teacher in
this unique educational setting and aimed also to investigate teachers’ engagement in professional support services available to
them. This chapter addresses the latter question by focusing on teachers’ experiences of continuing professional development (CPD).
Findings from this research indicate that teachers’ engagement and participation in CPD is low due to their dissatisfaction with
current provision. According to participants, current CPD services do not address the complex sociolinguistic environment in which
their professional practice is situated or their professional development needs within this context. Suggestions for policy and
practice in CPD directed at Gaeltacht and immersion teachers are also considered.
Teacher perceptions of immersion professional development experiences emphasizing language-focused content
instruction
Authors: Tedick Diane J. , Zilmer Caleb
Published: April 2020

The knowledge and pedagogies needed for immersion classrooms are unique and complex. Although there is a growing body of research
on immersion pedagogy, there is a dearth of research on professional development (PD) experiences that positively impact immersion
teacher practices. This chapter focuses on exploring immersion teacher perceptions of PD experiences in the area of language-focused
content instruction that have a positive impact on their teaching. The theoretical framework guiding the study is “communities of
practice” (CoP) (Wenger, 1998), and survey and focus group data were analyzed in
relation to Wenger’s four realms of CoP (community, practice, meaning, and identity). Findings revealed specific features of high
impact assignments and PD experiences. The chapter concludes with implications for designing meaningful and effective PD experiences
for immersion educators and others who teach in CBI settings.
Unpacking dimensions of immersion teacher educator identity
Authors: Leavy Aisling , Hourigan Mairéad , Ó Ceallaigh T.J.
Published: April 2020

Inadequate teacher preparation for immersion programs remains a challenge. While there is a significant dearth of research on
teacher development in immersion education, research focusing on immersion teacher educators (ITEs) is even more scant. Using
self-study methodology, this study explores the professional learning and experiences of three teacher educators (TEs) as they
construct new professional identities as ITEs as part of engagement in Lesson Study. The chapter particularly focuses on two
Mathematics teacher educators (MTEs) who were newcomers to the immersion education setting. A community
of practice (CoP) framework was utilised to provide insights into what Vygotsky (1987) terms the twisting path of all three
TEs as they engaged in the CoP. Critical moments of defending content as priority, negotiating an integrated space, and becoming
immersion-responsive were revealed. CoP played a vital role in facilitating new professional identities and illuminates in
multiple ways the exclusive and complex process of becoming an ITE.
Maximal lactate accumulation rate and post‐exercise lactate kinetics in handcycling and cycling
Authors: Quittmann Oliver J. , Abel Thomas , Vafa Ramin , Mester Jonas , Schwarz Yannick M. , Strüder Heiko K.
Published: April 2020

The aim of this study was to assess lactate kinetics, maximal lactate accumulation rate (⩒Lamax) and peak power output (POmax) in a 15‐s all‐out exercise in handcycling (HC) and cycling (C) in terms of (1) reliability, (2) differences and (3) correlations between HC and C. Eighteen female and male competitive triathletes performed two trials (separated by one week) of a 15‐s all‐out sprint test in HC and C. Tests were performed in a recumbent racing handcycle and on the participants’ own road bike that were attached to an ergometer. Reliability was assessed using intraclass correlation coefficient (ICC). POmax and ⩒Lamax demonstrated high reliability in HC (ICC = 0.972, ICC = 0.828) and C (ICC = 0.937, ICC = 0.872). POmax (d = −2.54, P < 0.0005) and ⩒Lamax (d = −1.62, P < 0.0005) were lower in HC compared to C. POmax and ⩒Lamax correlated in HC (r = 0.729, P = 0.001) and C (r = 0.710, P = 0.001). There was no significant correlation between HC and C in POmax (r = 0.442, P = 0.066) and ⩒Lamax (r = 0.455, P = 0.058). Whereas the exchange velocity of lactate (k1) was similar in HC and C, the removal velocity (k2) was significantly higher in HC. ⩒Lamax and POmax during sprint exercise are highly reliable and demonstrate a correlation in both HC and C. However, since ⩒Lamax and POmax are significantly higher in C and not correlated between HC and C, ⩒Lamax and POmax seem to be extremity‐specific.
Self-assembled vesicle–colloid hybrid swimmers: Non-reciprocal strokes with reciprocal actuation
Authors: Agudo-Canalejo Jaime , Nasouri Babak
Published: April 2020

We consider a self-assembled hybrid system, composed of a bilayer vesicle to which a number of colloids are adhered. Based on known results of membrane curvature elasticity, we predict that, for sufficiently deflated prolate vesicles, the colloids can self-assemble into a ring at a finite distance away from the vesicle equator, thus breaking the up–down symmetry in the system. Because the relative variation of the position of the colloidal ring along the vesicle endows the system with an effective elasticity, periodic cycles of inflation and deflation can lead to non-reciprocal shape changes of the vesicle–colloid hybrid, allowing it to swim in a low Reynolds number environment under reciprocal actuation. We design several actuation protocols that allow control over the swimming direction.
Critical behavior in the layered organic-inorganic hybrid (CH3NH3)2CuCl4*
Authors: Raoufi Tina , Ma Yinina , Sun Young
Published: April 2020

The critical properties and the nature of the ferromagnetic–paramagnetic phase transition in the 2D organic-inorganic hybrid (CH3NH3)2CuCl4 single crystal have been investigated by dc magnetization in the vicinity of the magnetic transition. Different techniques were used to estimate the critical exponents near the ferromagnetic–paramagnetic phase transition such as modified Arrott plots, the Kouvel–Fisher method, and the scaling hypothesis. Values of β = 0.22, γ = 0.82, and δ = 4.4 were obtained. These critical exponents are in line with their corresponding values confirmed through the scaling hypothesis as well as the Widom scaling relation, supporting their reliability. It is concluded that this 2D hybrid compound possesses strong ferromagnetic intra-layer exchange interaction as well as weak interlayer ferromagnetic coupling that causes a crossover from 2D to 3D long-range interaction.
A New 3-D Chaotic Jerk System with Four Nonlinear Terms, its Backstepping Synchronization and Circuit Simulation
Authors: Lamamra K. , Vaidyanathan S. , Putra W. T. , Darnila E. , Sambas A. , Mujiarto
Published: April 2020

A new 3-D chaotic jerk system with four nonlinear systems is proposed in this research work. There is great interest in the literature in discovering chaos in mechanical systems. In this work, we find chaos in a 3-D chaotic jerk system, which is a mechanical oscillator with four nonlinear terms. As a control application, we design backstepping based global chaos synchronization for a pair of new chaotic jerk systems. As a circuit application, we design MultiSIM electronic circuit for the new chaotic jerk system. The MultiSIM outputs show good agreement with the MATLAB outputs for the new jerk system.
Dimensional Reduction on Cross Project Defect Prediction
Authors: Saifudin A , Yulianti Y
Published: April 2020

The complexity of the software can increase the possibility of defects. Defective software can cause high losses. The software containing defects can cause large losses. Most software developers don’t document their work properly so that making it difficult to analyse software development history data. The cross-project software defect prediction used several datasets from different projects and combining for training and testing. The dataset with high dimension can cause bias, contain irrelevance data, and require large resources to process it. In this study, several dimensional reduction algorithm and Decision Tree as classifier. Based on the analysis using ANOVA, all models that implement dimensional reduction can significantly improve the performance of the Decision Tree model.
Level of Information Technology Power of Ability to Make Learning Media PowerPoint Teacher
Authors: Norhayatun  , Qahfi Muhamat , Alimah Tri Mutho
Published: April 2020

The purpose of this research was to know the influence of Technology Information mastery. The influence of Technology Information Mastery to The Teacher’s Ability in Making PowerPoint Learning Media of Social Science Teacher. The method that was by the writer was a quantitative method the population of the research was all the social science teachers of Junior. A high school in sampit. The sampling technique in the research was a saturated sample with 36 respondents. The collecting data techniques were questioner and inquiries. The technique of analyzing data was a prerequisite test (nominally test and linear test), simple regression linear similarity, Hypothesis test (T-test) and determination coefficient (R2). The result of the research was based on counting by SPSS formula, the writer gets T arithmetic about 6,9145 with significance P about 0,000 So P<0.,05. It was mean that the hypothesis was asked by the writer was acceptable. That these was positive influence and significance in technology mastery to The influence of Technology Information Mastery to The Teacher’s Ability in Making PowerPoint Learning Media of Social Science Teacher.
Learning gurindam 12 as local wisdom through role playing assisted by audio visual to strengthen character of students
Authors: Zaitun  , Hakam K Abdul , Adiwikarta S , Ruyadi Y
Published: April 2020

This study aimed to describe the strengthening of student character by learning Gurindam 12 through Role Playing assisted by Audio Visual. The research method was carried out with the Borg and Gall theory on research and development (R and D), this researcher conducted pre-tests and post-tests to find out whether local wisdom learning of Gurindam 12 through Role Playing assisted by Audio Visual can improve noble character in students. The sample in this study were prospective students of Indonesian Language and Literature Education study program teachers at the Faculty of Teacher Training and Education (FKIP) UMRAH. The result is that the Gurindam 12 through Role Playing assisted by Audio Visual makes learning more active and more enjoyable and can increase the values of positive characters in students including helping and cooperating with each other, and socially sensitive.
The Effect of Psychometric Analysis Series Training on the Item Analysis Ability of High School Teachers in Bandung
Authors: Jatnika R , Purwono U , Djunaidi A , Haffas M
Published: April 2020

The Psychometric Analysis Series (PAS) is software developed for item analysis, which consists of item difficulty, item discrimination, distractor power, reliability and descriptive statistics of a test. This study was conducted to look at the effect of the Psychometric Analysis Series training on the Item Analysis Ability of high school teachers in Bandung. The study was conducted using a one-group pretest-posttest design. The ability of Item Analysis is measured using an instrument that is scored between 0 to 10. The training participants consisted of 35 high school teachers in Bandung. The data obtained were analyzed using the t-test. The results showed a significant increase in the ability of item analysis in the posttest compared to pretest (t = 8,777; p = 0,000). Based on these results it can be concluded that the Psychometric Analysis Series training can improve the ability of item analysis of high school teachers in Bandung.
Characteristics of Activated Carbon from Melinjo Shells Composed of TiO2 Nanoparticles
Authors: Slamet  , Yuliusman  , Dwijayanti Apriliana , Kartika Safril
Published: April 2020

The synthesis of activated carbon derived from biomass melinjo shells has been carried out by compiling it with TiO2 nanoparticles. TiO2 nanoparticles are used to improve the performance of adsorbents as degradation compounds. The main objective of this study was to determine the effect of TiO2 nanoparticles on the activated carbon composite. Activated carbon is first made by carbonizing biomass at 400°C for 15 minutes, then chemically activated with 65% KOH and physical activation at 500°C. TiO2 nanoparticles were dissolved in demin water and TEOS produced a mixture of sol and then composite with activated carbon 10 g, 20 g, 30 g, and 40g. The characteristics test which analyzes includes iodine number, XRD, SEM-EDX, and BET tests. Analysis of the largest iodine and surface area (BET) tests is at AC40 each 467.387 mg/g and 273.664 m2/g. The XRD showed that the activated carbon was amorphous while the composite produced a crystalline structure.
Analysis of Blade Turbine Damage in Turbocharger System in PLTD Diesel Engine
Authors: Lukman Hafidz M , Wibowo Tri
Published: April 2020

Damage to the diesel engine turbocharge with a capacity of 11.3 MW which has been operating for around 18 years has caused a halt in electricity supply to one of the regions in eastern Indonesia. The data before the damage occurred was that the generator engine was operating at a load of 10.2 MW, with the engine running hour being 66,930.2 (hours), the exhaust temperature before and after the turbocharge was 514 ° C / 342 ° C and the speed on the turbocharge was 16,637 rpm, where the data is still within the limits of normal operation. After dismantling the turbocharge, it was found that there were damage to the components of the turbocharge, namely: turbine blade, shaft, ring nozzle, and others. To ensure such damage, a number of tests and materials were tested specifically for the turbine blade. The testing method is the methallografy test, chemical composition and hardnes test. The results of the analysis indicated that the turbine blade material was damaged quickly or instantly, so it was believed that the material was damaged because of the impact of foreign material entering the turbocharge system. The total loss of damage to this turbocharge is IDR 10,663,278,512 (Repair and Loss of Profit Costs).
Effect of Additive Chemicals on Soil Characteristics
Authors: Sutarman Encu , Widjajani  , Dwipriyoko Estiyan
Published: April 2020

The occurrence of landslides in the hills of Walahir, Kidang Pananjung village, Cililin subdistrict. Bandung in May 2004 needed attention and research so that the causes of the landslide could be identified. This landslide took many lives and property, heaped around 5 hectares of rice fields and residents’ villages below and claimed 15 lives. Based on geotechnical investigations, the slip plane is at a depth of 4 meters from the ground surface and the area of the landslide ranges from 30,000 m2 leaving weathered rock beneath. Is the opening of agricultural land and fields followed by the use of chemical fertilizers is one of the causes of landslides? This study aims to determine the effect of a single chemical fertilizer (Urea, Za, SP36) and compound (Green Giant NPK, MKP) on the soil under conditions of optimum water content and water saturation or soaked which are carried out at the Chemical Laboratory of the Department of Energy and Mineral Resources of Bandung and Mechanics Laboratory Bandung Institute of Technology. Research on the influence of chemical fertilizers which is carried out using percentages of 1%, 2% and 3% with a relatively short ripening time intends to analyze the extent to which chemical fertilizers have an effect. Research is limited to the identification of minerals and chemical elements of original soil, soil physis properties, Atterberg boundaries, soil index properties, soil classification, soil elastic modulus. Hypothesis; The chemical content of fertilizers in the soil causes changes in soil characteristics. The method of taking original soil is by drilling original soil around the area where landslide disaster occurred at the same height as the height of the landslide slope, soil samples taken from depths of 1 meter and 3 meters from the surface of the land or the base layer between soil and rocks based on ASTM D-1452, 1587, 1586. Laboratory data from the original soil and chemical soil mixture of fertilizers is needed as input data for the study material and is an analytical proof of the hypothesis. Based on research that the presence of chemical fertilizers in soil samples with optimum water content causes the water content in the soil to decrease this is because chemical fertilizers absorb water while the soaked soil samples cause the water content in the soil to increase, the plasticity index decreases so that changing the soil classification in the area from OH-MH becomes ML-OL unified classification and the elasticity of the soil changes. Based on the analysis that the presence of chemical fertilizers showed an influence on the physical properties of the soil where soil minerals are very possible the replacement of cations of the chemical elements contained in the chemical fertilizers. The addition of chemical fertilizer by 3% and curing time for 14 days is a maximum condition compared to the percentage and age of other curing.
Economic value of non timber forest products - A Case study from South Tapanuli, North Sumatera, Indonesia
Authors: Latifah S , Lubis N A
Published: April 2020

Non-timber forest products (NTFPs) are any product or service other than wood produced in the forest. NTFPs that are used by people around the forest are medicinal plants, resins, gums, essences and a series of bark and fibre, fruits and nuts. The study was conducted in Marancar Godang Village, Marancar District, South Tapanuli Regency, and North Sumatera. This study tries to find out, the dependence and significance of livelihoods from NTFPs for forest-dependent people. The study site has economic value for the utilization of non-timber forest products is 2,441,416,000,- IDR/year. The existence of forests is still a support for people’s lives in the economic field.
Determinants of the mixed crop and livestock farming practice among smallholder farmers in Magelang Regency, Central Java Province
Authors: Widarni N A A , Astuti A , Andarwati S , Kusumastuti T A , Putra A R S
Published: April 2020

The mixed crop and livestock (MCL) farming could enhance farmers to improve their farming practice. This study aims to analyse factors that influence the adoption of MCL farming in Magelang Regency. A multistage random sampling method was used to select the locations and the respondents. Data were collected through personal interview based on structured questionnaire from 161 smallholder farmers. Logit models was applied to analyse the binary choices of practicing MCL farming. The result indicated that age, consulting toward extension agent, and number of livestock kept by farmer were significant at the level 10%, experience on raising livestock was significant at the level 5% and type of ruminants was significant at the level 1%. It may conclude that the younger farmers and farmers who raised large ruminants were have more possibility to adopt the MCL farming practice.
Managerial implications of North Sumatera coffee export risks using the failure mode and effect analysis method
Authors: Fadhilah D D , Ayu S F , Rahmanta
Published: April 2020

Managing risk can be conducted starting with the process of identifying and measuring the magnitude of the risks occurred. The study of coffee export risk management research is based on the experience of experts in the coffee export business. Risk management is the most important element to protect companies from the risk of losses that may arise. The purpose of this study is to examine the types and sources of risk, as well as the magnitude of the risk. Then give a proposed strategy in the risk of North Sumatra coffee exports. The location of the research determined purposively. The research data are primary data obtained from interviews using questionnaire. The data analysis method used is Analytical Network Process (ANP) and Failure Mode and Effects Analysis (FMEA). The results showed that the biggest risk to coffee exports was in production activities (procurement of raw materials until it ready to be sent) while the lowest risk was at policy risk. The exporters need to give sustained guidance to farmers in yielding products in accordance with standards and be able to cooperate with the government in the continuity of export.
Consumer preference on milk crackers made from goat milk based on organoleptic test in Medan, Indonesia
Authors: Siregar N A , Susanti A T , Nasution A A , Sitindaon S H , Sobur  , Marimpun  , Siregar D J S , Lubis N , Ginting S P , Hasnudi  , Henuk Y L
Published: April 2020

The purpose of this research is to determine consumer preference on milk crackers made from goat milk based on organoleptic test in Medan, Indonesia. Thirty consumers were determined by using judgement sampling techniques of organoleptic to assess the satisfaction of consumer to goat’s milk cracker included colour, taste, crispiness, flavour and overall acceptance of goat’s milk cracker made from goat milk after frying. Organoleptic test resulted in processing milk crackers made from goat milk with various variations in the addition of goat milk into the basic formula produced a positive effect on colour, taste, crispness, aroma and overall acceptance of milk crackers. Organoleptic test resulted in processing milk crackers with different drying time do not significantly affected the colour, taste, crispness, aroma and overall acceptance of milk crackers. The most preferred treatment by panellists was the addition of 1 litre of goat milk contained a carbohydrate of 48.8%, protein 3.52% and fat 34.6%.
Improvement strategy of livestock business in Deli Serdang
Authors: Lindawati L , Henderawan D , Zulfida I , Lumbantoruan K N
Published: April 2020

The purpose of this study was to determine the feasibility of livestock business to find out the strategies taken in improving livestock products. Determination of the study area was done purposively. The method of determining the sample is a census with a total sample of 37 breeders. Data analysis methods used were business feasibility analysis (R/C) and SWOT analysis. The results showed livestock business in the study area can be said to be feasible where the value of R/C> 1 was 1.89 obtained from depreciation costs of IDR 3,287,552, variable costs of IDR 5,403,108, revenue of IDR 111,414,865 and income of IDR 52,724,205. The right strategy to increase the production of livestock business in the study area lies in quadrant I, which is Aggressive or SO (Strengths and Opportunity) strategies which include forcing the availability of labour and forage feed to increase implementation patterns of integration of livestock with plants, beef quality can be supported by the condition of livestock that is protected from disease so that the availability of local livestock products in the market is sufficient to meet the high demand for beef. The experience of livestock can broaden knowledge in developing livestock business supported by technological developments.
The impact of import quota and reference price policies on the shallot price and supply in North Sumatera
Authors: Pane T C , Supriana T
Published: April 2020

The government policy to limiting shallot import based on quota has an impact on the soaring of domestic shallot price triggering inflation. In order to reduce the inflation rate, the government has changed the basis consideration for import recommendation of shallot horticultural products to be based on a reference price determined by the Minister of Trade. This study analysed the impact of these import quota and reference price policies on the shallot price and supply in North Sumatera. In order to analyse the impact of these government policies, the time series data were analysed using the Compare Means Test, namely the Independent Samples t-Test, so that the differences between before and after the implementation of policies could be estimated. The results showed that the import quota and the reference price policies were not effective in increasing the shallot price at the producer level, but they were effective in decreasing the shallot price at the consumer level, improving the imported shallot price at the consumer level, and also developing the production, harvest area, and productivity of shallot farming.
The supply chain of North Sumatera shallot
Authors: Pane T C , Supriana T
Published: April 2020

Shallot is one of the main food seasonings in Indonesia, which cannot be substituted with other ingredients. North Sumatera is one of the provinces producing shallot. Even it produces quite a large amount of production, there is still a large gap between the shallot production and consumption amount in North Sumatera due to its high consumption. Thus, the shallot supply chain in North Sumatera must always be maintained, so that the shallot can be well distributed to maintain price stability and meet consumer demand. In order to be managed properly, it is necessary to know the North Sumatera shallot supply chain. This study described the supply chain of North Sumatera shallot. The study was conducted by tracing the North Sumatera shallot supply chain starting from the production centre to the final destination regions, and then the supply chain was drawn in the Causal Loop Diagram. The results showed that the shallot production centres in North Sumatera Province consisted of six districts, namely Simalungun, Samosir, North Tapanuli, Dairi, Karo, and Toba Samosir. There were six final destination regions for shallot from those six districts, namely Medan, Padang Sidempuan, and Sibolga in North Sumatera, Kuta Cane in Aceh, West Sumatera, and Riau.