bluuebunny/crossref_metadata_2025 huggingface dataset:
Extending Scaled-Interaction Adaptive-Partitioning QM/MM to Covalently Bonded Systems
Authors: Yang Zenghui
Published: May 2020

Quantum mechanics/molecular mechanics (QM/MM) is the method of choice for atomistic simulations of large systems that can be partitioned into active and environmental regions. Adaptive-partitioning (AP) methods extend the applicability of QM/MM, allowing active zones to change during the simulation. AP methods achieve continuous potential energy surface (PES) by introducing buffer regions in which atoms have both QM and MM characters. Most of the existing AP-QM/MM methods require multiple QM calculations per time step, which can be expensive for systems with many atoms in buffer regions. Although one can lower the computational cost by grouping atoms into fragments, this may not be possible for all systems, especially for applications in covalent solids. The SISPA method [J. Chem. Theory Comput. 2017, 13, 2342] differs from other AP-QM/MM methods by only requiring one QM calculation per time step, but it has the flaw that the QM charge density and wavefunction near the buffer/MM boundary tend to those of isolated atoms/fragments. Besides, regular QM/MM methods for treating covalent bonds cut by the QM/MM boundary are incompatible with SISPA. Due to these flaws, SISPA in its original form cannot treat covalently bonded systems properly. In this work, I show that a simple modification to the SISPA method improves the treatment of covalently bonded systems. I also study the effect of correcting the charge density in SISPA by developing a density-corrected pre-scaled algorithm. I demonstrate the methods with simple molecules and bulk solids.
Van Der Waals Epitaxy of Soft Twisted Bilayers: Lattice Relaxation and Static Distortion Waves
Authors: Jin Cong , Olsen Brian , Luber Erik , Buriak Jillian
Published: May 2020

Interfaces comprising incommensurate or twisted hexagonal lattices are ubiquitous and of great interest in the materials science and physics communities. Here we demonstrate 2D crystalline domains of soft block copolymers (BCPs) on patterned hard hexagonal lattices that provide fundamental insights into van der Waals heteroepitaxy. At moderate registration forces, it is experimentally found that these BCP-hard lattice incommensurate arrays do not adopt a simple Moiré superstructure, but instead adopt local structural deformations called static distortion waves (SDWs) a primary route to energy minimization.
Nanotubular Titanium Oxynitride with an Ultra-Low Iridium Loading as a High-Performance Oxygen-Evolution-Reaction Thin-Film Electrode
Authors: Bele Marjan , Jovanovič Primož , Marinko Živa , Drev Sandra , Šelih Vid Simon , Kovač Janez , Gaberšček Miran , Koderman Podboršek Gorazd , Drazic Goran , Hodnik Nejc , Kokalj Anton , Suhadolnik Luka
Published: May 2020

The present study targets one of the grand challenges of electrochemical hydrogen production: a durable and cost-effective oxygen-evolution catalyst. We present a thin-film composite electrode with a unique morphology and an ultra-low loading of iridium that has extraordinary electrocatalytic properties. This is accomplished by the electrochemical growth of a defined, high-surface-area titanium oxide nanotubular film followed by the nitridation and effective immobilization of iridium nanoparticles. The applicative relevance of this production process is justified by a remarkable oxygen-evolution reaction (OER) activity and high stability. Due to the confinement inside the pores and the strong metal-support interaction (SMSI) effects, the OER exhibited a higher turnover. The high durability is achieved by self-passivation of the titanium oxynitride (TiON) surface layer with TiO2, which in addition also effectively embeds the Ir nanoparticles, while still keeping them electrically wired. An additional contribution to the enhanced durability comes from the nitrogen atoms, which according to our DFT calculations reduce the tendency of the Ir nanoparticles to grow. We also introduce an advanced electrochemical characterization platform for the in-depth study of thin-film electrodes. Namely, the entire process of the TiON-Ir electrode’s preparation and the electrochemical evaluation can be tracked with scanning electron microscopy, X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) at identical locations. In general, the novel experimental approach allows for the unique morphological, structural and compositional insights into the preparation and electrocatalytic performance of thin films, making it useful also outside electrocatalysis applications.
STAG1 vulnerabilities for exploiting cohesin synthetic lethality in STAG2-deficient cancers
Authors: van der Lelij Petra , Newman Joseph A , Lieb Simone , Jude Julian , Katis Vittorio , Hoffmann Thomas , Hinterndorfer Matthias , Bader Gerd , Kraut Norbert , Pearson Mark A , Peters Jan-Michael , Zuber Johannes , Gileadi Opher , Petronczki Mark
Published: May 2020

The cohesin subunit STAG2 has emerged as a recurrently inactivated tumor suppressor in human cancers. Using candidate approaches, recent studies have revealed a synthetic lethal interaction between STAG2 and its paralog STAG1. To systematically probe genetic vulnerabilities in the absence of STAG2, we have performed genome-wide CRISPR screens in isogenic cell lines and identified STAG1 as the most prominent and selective dependency of STAG2-deficient cells. Using an inducible degron system, we show that chemical genetic degradation of STAG1 protein results in the loss of sister chromatid cohesion and rapid cell death in STAG2-deficient cells, while sparing STAG2–wild-type cells. Biochemical assays and X-ray crystallography identify STAG1 regions that interact with the RAD21 subunit of the cohesin complex. STAG1 mutations that abrogate this interaction selectively compromise the viability of STAG2-deficient cells. Our work highlights the degradation of STAG1 and inhibition of its interaction with RAD21 as promising therapeutic strategies. These findings lay the groundwork for the development of STAG1-directed small molecules to exploit synthetic lethality in STAG2-mutated tumors.
Structural basis of HapEP88L-linked antifungal triazole resistance in Aspergillus fumigatus
Authors: Hortschansky Peter , Misslinger Matthias , Mörl Jasmin , Gsaller Fabio , Bromley Michael J , Brakhage Axel A , Groll Michael , Haas Hubertus , Huber Eva M
Published: May 2020

Azoles are first-line therapeutics for human and plant fungal infections, but their broad use has promoted the development of resistances. Recently, a pan-azole–resistant clinical Aspergillus fumigatus isolate was identified to carry the mutation P88L in subunit HapE of the CCAAT-binding complex (CBC), a conserved eukaryotic transcription factor. Here, we define the mechanistic basis for resistance in this isolate by showing that the HapEP88L mutation interferes with the CBC’s ability to bend and sense CCAAT motifs. This failure leads to transcriptional derepression of the cyp51A gene, which encodes the target of azoles, the 14-α sterol demethylase Cyp51A, and ultimately causes drug resistance. In addition, we demonstrate that the CBC-associated transcriptional regulator HapX assists cyp51A repression in low-iron environments and that this iron-dependent effect is lost in the HapEP88L mutant. Altogether, these results indicate that the mutation HapEP88L confers increased resistance to azoles compared with wt A. fumigatus, particularly in low-iron clinical niches such as the lung.
供应商管理库存对供应商的成本分析
Authors: 任 静
Published: May 2020

随着经济的快速发展，国家越来越重视现阶段的供应商管理库存工作。为了进一步实现供应商的管理库存成本的总成本节约，必须要根据实际情况对传统的库存管理方式进行突破，建立对应的成本模型，优化提高企业竞争力的方案，适应现代社会市场竞争机制。因此，论文主要针对供应商管理库存对供应商的成本进行简要分析，并提出合理化建议。
“一带一路”倡议下对来华留学生创新创业能力培养的评价探究
Authors: 刘 子睿
Published: May 2020

来华留学生教育特别是创新创业教育成为服务于国家战略、“一带一路”沿线国家和地方经济建设的重要抓手，留学生的创新创业能力高低也是衡量来华留学生教育质量的关键指标之一。论文结合留学生教育的特殊性，建立了创新创业能力培养的评价指标体系，并采用层次分析法及专家评分法确定权重，分析结果得知当前提升留学生创新创业能力的双创教育应侧重于学习能力和创新精神的培养，并提出相应的建议。
投资项目核心财务指标设计
Authors: 孙 丛青
Published: May 2020

目前，在私募投资行业，对投资项目负责人（投资总监）普遍采用项目业绩提成的激励方式。但是，项目存续期往往很长，而业绩提成只有在项目结束后才能兑现，不能对项目业绩实施实时监控。同时，不同项目的业绩、不同投资总监的业绩无法进行比较，没有日常的业绩考核指标指导投资总监的项目管理行为，导致项目管理缺乏能动性。论文在分析资本市场常用的业绩考核指标（ROE( 净资产收益率 ) 及 EVA（经济增加值）、ROI( 投资回报率 )）的基础上，提出根据投资者对被投资企业的影响力设计财务考核指标，设计以 RIS/EVS（投资回报序列 / 权益增值序列）、BAGRA（盈利成长矩阵）作为投资总监的项目业绩财务考核指标组合，并以此为基础建立一整套的管理思想及管理制度体系，促进私募投资企业的业绩增长。
宽带薪酬实施中的典型问题及对策研究——以电力企业为例
Authors: 陈 柏惠
Published: May 2020

论文先简单介绍了宽带薪酬的概念及特点，接着分析在电力企业实施宽带薪酬可能会出现不具备实施宽带薪酬的管理基础、企业文化、配套机制以及宽带薪酬自身存在不可回避的局限等问题。针对发现的问题，笔者从夯实人力资源管理基础、营造以绩效和能力为导向的企业文化、建立健全岗位胜任能力评价体系和绩效管理体系、合理设置薪酬档级等方面提出了改进建议，让宽带薪酬真正为企业带来效益。
科创板实施背景下律师的非诉讼业务探究
Authors: 景 倩
Published: May 2020

科创板是在新时代下提出的符合经济发展新要求、新趋势的新板块。 这一新改革是中国资本市场的重大突破，旨在更好地利用前景广阔的企业，优化科创企业结构，增强市场包容性，强化市场功能。 在整个过程中，为了保证相关企业在各个环节所实施行为的规范性和专业性，律师事务所作为中介机构起着重要的配合作用， 律师通过进行相关的非诉讼业务，辅助、引导企业更好地进入科创板市场。
现代企业会计制度建设与会计监督
Authors: 卫 国秀
Published: May 2020

新时期的经济环境，在为企业提供新的发展机遇的同时，也使企业面临着更加严峻的形势。企业在经营发展中，应当积极发挥企业会计的职能，通过构建企业制度体系，使企业更好地掌握资金的流向。企业会计还可以通过监督环节，增强企业会计工作的可靠性，使企业在经济发展浪潮中增强自身竞争实力。
内控视角下的事业单位管理会计应用研究
Authors: 陈 凯
Published: May 2020

随着社会经济不断发展，管理会计在事业单位中的作用不断凸显出来。管理会计在事业单位中与内部控制存在着相辅相成的关系，可以共同促进事业单位管理水平的提升和经济业务的稳定发展。因此，需要加强对事业单位管理会计运用工作的重视。论文主要针对在内部控制视角下事业单位管理会计的实际应用进行探究，希望能为事业单位的有序发展提供一定的参考。
农田水利施工中的水土保持
Authors: 童 河华
Published: May 2020

农业在中国经济体系中占据十分重要的地位，同时农业也是维持其他产业高速发展，稳定社会的重要因素。因此中国不断重视农业的发展和与农业相关的基础设施的建设，但是随着近些年来农业的高速发展也给生态环境带来了一定的问题，其中农田的水土流失就是其中一个比较重大且难以解决的问题，笔者认为解决农田的水土流失问题需要从农田水利的建设施工入手，科学合理的农田水利施工不仅可以对农业的发展起到促进作用，还有利于遏制水土流失的问题，从而对生态环境的保护起到积极的作用。
水利工程输水隧洞施工技术分析
Authors: 梁 道广
Published: May 2020

随着中国的经济发展，水利工程的发展规模也开始逐渐加大。因此，中国对水利工程的质量要求也就有所提高。其中，输水隧洞施工技术是水利工程施工中最为重要的一项工程技术，影响着工程建设的质量。论文首先研究了水利工程输水隧洞施工技术的应用，同时对该技术的具体施工方法加以介绍，提出了水利工程施工的建议，希望对水利工程建设贡献一份力量。
基于儿童用户体验旅程的植物博物馆参与式服务设计
Authors: 于 亚楠 , 刘 丹丹
Published: May 2020

博物馆作为人们生活的重要参观场所，在为公众提供文化服务的过程中有着自身特点。儿童博物馆关注儿童的兴趣和需求，可以激发其学习兴趣。论文通过对博物馆参与式设计模式的理解，阐述了展览环境、设计内容和儿童艺术认知能力的培养，分析了儿童博物馆建设中应注意的设计元素，并在空间设计和展示设计方面探讨了儿童博物馆未来的发展方向。
基于无人机技术的工程土方量计算
Authors: 肖 永东 , 朱 劲松
Published: May 2020

进行地表改造的工程建设都会涉及土石方量的计算工作，而土石方量测绘及计算的速度和精度质量又直接影响着工程建设的进度及成本控制。论文通过使用多旋翼无人机摄影航测计算的方法实现了工程建设两期间土方量的快速、高效及高精度计算，能够有效解决传统方法中的不足，其计算具有较好的可视化效果，结果稳定且可靠。
无人机航测技术在水利工程测量中的应用
Authors: 冉 庆涛
Published: May 2020

科学技术的最新发展促进了无人机运载平台的持续发展，无人机航测技术已广泛应用于工程测量中以促进工程的顺利进行。其中，无人机航测技术水利工程的应用效果更为重要。在论文中，以水利工程为例简要介绍了无人机航空测量技术，分析了该技术在水利工程中的应用，并提出在使用该技术时要提高防范措施的建议，分析无人机航测技术在促进节约资源和成本方面的发展。
建筑面积测量工作中常用规范对比与分析
Authors: 何 川 , 杨 绪峰 , 陈 宇恒 , 周 悌慧
Published: May 2020

城市的建设和发展离不开各类测量工作，而房屋建筑面积测量是该项工作中重要的一部分。笔者根据自身在中国北京市建筑面积测量工作的实际经验，发现当前现行建筑面积测量工作相关标准规范各有侧重，在编制目的、条款规定和有关计算要求等方面即存在差异也可以相互补充，为更好的开展房屋建筑面积测量工作，笔者总结了常用的相关标准规范，并就编制背景、规范内容等方面作出对比和分析。
关于无人机航空摄影测量在地形图测绘中的应用
Authors: 王 传亮
Published: May 2020

随着城市化建设的不断发展，只有对城市有着整体的认识，才能更好地进行规划建设。在规划过程中，最为重要的是对城市的地形图进行测绘，这样才能有效掌握城市的地理信息。但是，该过程也会受到很多因素的影响，导致测量的精准度出现问题。而近年来中国的无人机技术不断发展起来，且不断地广泛应用于社会的各个领域。由此出现了无人机航空摄影测量技术，该技术具有成本低、操作简单、影响因素小等优势，具有较好的发展前景。论文主要对无人机航空摄影测量技术在地形图测绘中的应用进行分析。
Analysis of SWOT on the Development and Internationalization of China's Vocational Education in the context of â€œThe Belt and Road Initiativeâ€ Strategy
Authors: Hu Na , Xie Hua
Published: May 2020

Abstract:The Belt and Road Initiative strategy is proposed based on the stable and sustainable cooperation on economy and development in between China and neighboring countries. The development of economy can affects every aspects of the vocational education development. Therefore, the vocational education in China must be moved towards internationalization in order to achieve sustainable development in the face of the implementation of the Belt and Road Initiative strategy. The analysis data obtained through the Strengths, Weaknesses, Opportunities and Threats (SWOT) analysis method on the internationalization of China's vocational education under the background of the Belt and Road Initiative strategy were the advantages analysis (strengths) of continuous maturity inÂ  developing of vocational education which drives by economic development and the foreign employment and entrepreneurship guidance mechanism; the disadvantages analysis (weaknesses) of lack talent cultivation and weak branding of vocational education; analysis of support opportunities given by national policy; threats analysis of social culture in the involved countries along the route. In order to further develop and expand China's vocational education under the background of the Belt and Road Initiative strategy, some countermeasures were proposed such as improves cultivation or training of talents, to build strong branding of China vocational education, and faces cultural challenges and etc. to facilitate the international development of China vocational education.
Modaler Raum der Konditionalität aus kontrastiver Sicht
Authors: Kostrova Olga
Published: May 2020

Modaler Raum der Konditionalität setzt sich aus konditionalen Operatoren, dem potential-irrealen Modus und der lexikalisch-grammatischen Füllung der konditionalen Phrase zusammen. Das Problem besteht darin, inwieweit die genannten Faktoren für die zu vergleichenden Sprachen relevant sind. Im vorliegenden Artikel wird festgestellt, dass die Unterschiede im Sprachbau des Russischen und des Deutschen dafür entscheidend sind. Der flexiblere Sprachbau des Russischen lässt mehrere Variationen zu, die den modalen Raum der Konditionalität im Vergleich zum Deutschen implizieren lassen oder erweitern. Es sind stilistisch variable konditionale Operatoren sowie infinite Prädikate und non-verbale Konstruktionen im Nebensatz, die den modalen Raum flexibel bzw. indefinit machen.
Das Modalverb "dürfte" in epistemischer Verwendung: Ergebnisse einer neuen Korpusstudie
Authors: Mortelmans Tanja
Published: May 2020

Bezüglich dürfte – Konjunktiv II des Modalverbs dürfen – wissen wir einiges: Die Form hat sich vom zugrunde liegenden Modalverb dürfen weitgehend gelöst, dürfte hat meistens eine epistemische Bedeutung und bringt Wahrscheinlichkeit zum Ausdruck. Eine systematische, größer angelegte Korpusanalyse mit Fokus auf den Gebrauch von dürfte im Gegenwartsdeutschen liegt allerdings bis jetzt nicht vor. Der vorliegende Beitrag versucht diese Lücke zu schließen, indem 500 dürfte-Belege aus dem Wikipedia-Korpus wdd 2011 systematisch analysiert werden, wobei vor allem die Eigenschaften des infinitivischen Komplements und die Kombination mit Modalpartikeln unter die Lupe genommen werden.
Die Charaktere des Erfolgs aus linguistischer Sicht
Authors: Tichák Viktor
Published: May 2020

Die Studie präsentiert ein neu definiertes System der Kategorien Aspektualität, Aktionsart und Verbalcharakter. Das Ziel ist es, die Existenz semantisch markierter tschechischer Verben zu beschreiben, die die letzte Phase eines durativen Prozesses und dessen erfolgreichen Abschluss ausdrücken (z.B. dočkat se und čekat) und die semantische Kategorie ‚Erfolg‘ im Tschechischen und Deutschen systematisch einzuordnen.
Lebenslauf bis 2019
Authors: Engel Ulrich
Published: May 2020

Ulrich Engel schildert die einzelnen Stationen seines Lebens: als Kind im Vorkriegsdeutschland und als junger Soldat, anschließend seine Lehrertätigkeit und wissenschaftliche Laufbahn, insbesondere seine Funktion als Direktor des Instituts für Deutsche Sprache in Mannheim. Er hebt seine Tätigkeit als Leiter von mehreren Projekten von kontrastiven zweisprachigen Grammatiken sowie Valenzwörterbüchern hervor. Dabei schildert er seinen familiären Hintergrund als Spiegel des gesellschaftlich-politischen Wandels im Vor- und Nachkriegsdeutschland.
Die Hanse als instrumentalisierter Erinnerungsort in touristischen Flugschriften aus der Freien Stadt Danzig (1920–1939)
Authors: Lukas Katarzyna
Published: May 2020

Gegenstand des Beitrags sind deutschsprachige touristische Flugschriften aus der Zeit der Freien Stadt Danzig (1920–1939), die sich an potentielle Besucher aus dem Deutschen Reich wenden. Die analysierten Flugschriften wurden für Werbe- und Propagandazwecke eingesetzt. Sie bewerben die Freie Stadt Danzig als Urlaubsziel, versuchen aber nebenbei, die Rezipienten von dem genuin deutschen Charakter Danzigs als ehemalige Hansestadt zu überzeugen. Um die kollektive Identität der deutschen Adressaten anzusprechen, werden in die Texte Referenzen auf die Hanse als Erinnerungsort und stereotype „Verkörperung des Deutschtums“ eingebaut. Das Stereotyp der Hanse wird auf zwei Ebenen aktiviert: auf der sprachlichen (durch klischeehafte Phrasen und wertende Attribute, die sich explizit auf die glorreiche hansische Vergangenheit von Danzig beziehen) und auf der visuellen (durch Bilder von Danziger Bauwerken, die im Hanse-Stil erbaut wurden).
jogos digitais como possibilidade de promoção do letramento literário
Authors: Santos Rodrigo Alves dos , Bechelane Maria Júlia Silva , Silva Orlando Enrico Liz Silvério
Published: May 2020

Este texto vem demonstrar como os jogos digitais podem se constituir como alternativa para a promoção de letramento literário na formação de leitores críticos e reflexivos no ensino médio. Nele, parte-se de uma síntese da mudança de perspectiva na abordagem do texto literário demandada pelo discurso oficial vigente no país desde os anos 1990, para apresentar um modelo de jogo digital desenvolvido de forma a aplicar a perspectiva dos multiletramentos na formação do leitor de literatura. Tem-se, ainda, uma sumarização das teorias do letramento, destacando seu impacto na abordagem do texto na sala de aula de língua portuguesa do ensino médio nacional.
Análise quantitativa e qualitativa dos resíduos sólidos coletados por cinco anos no Dia Mundial de Limpeza de praias realizado na região costeira de Barra de Caravelas, BA
Authors: Lago Vivian Miranda , Oliveira Paula Andrea
Published: May 2020

Os detritos marinhos representam uma ameaça crescente aos ambientes costeiros e oceânicos. Nos últimos anos este resíduo tem ganhado destaque devido aos graves danos causados ao ambiente. O presente estudo realizou uma análise quantitativa e qualitativa dos resíduos sólidos encontrados na região costeira de Barra de Caravelas, BA. O material coletado foi resultado de campanhas realizadas em conjunto com as ONGs Patrulha Ecológica – Escola da Vida e Instituto Baleia Jubarte. O plástico foi o constituinte mais abundante, totalizando 2.972 kg, seguido de tecido (709,4 kg), metal (352,3kg), isopor (246,7 kg), vidro (246 kg) e borracha (217,8 kg). Os outros resíduos não foram tão significativos quando comparados aos citados, exceto o nylon (131 kg). Nota-se a importância de avaliar a poluição por lixo na região costeira de Caravelas, BA, uma vez que esses dados podem contribuir para a conservação da biodiversidade.
Creating competitive galega and bromus cenoses
Authors: Bakshaev D. Yu. , Sadokhina T. A. , Listkov V. Yu.
Published: May 2020

Field experiments (2001–2005) were carried out to create optimal schemes for sowing mixtures of perennial grasses in the forest-steppe of Western Siberia. Objects of research were Krasnoobsky oats, Eastern galega Gorno-Altayskaya 87, awnless brome Antey. The soil of the plots was medium thick, medium loamy leached chernozem. The experiment was carried out in two layouts spread in time and in space. Grasses were sown under the cover of Krasnoobsky oats. Awnless brome was sown across galega in the first ten days of May. Seeding rate of awnless brome was 3.0; 4.5 and 6.0 million germinating seeds per hectare. Recordings of yield were made according to standard methods. The highest yield of galega dry mass was achieved when it was sown in rows with awnless brome planted with inter-row spacing of 15 cm (it was higher than with 30 cm inter-row spacing by 1.16 t/ ha and 0.63 t/ha, respectively). In the variant “three rows of galega + a row of awnless brome” (3 : 1), the yield of dry mass of the mixture in two cuttings was higher by 5.7 and 2.1% than when they were sown with every other row skipped. The total yield for two cuttings exceeded single-species crops of galega by 0.48–2.03, and awnless brome by 2.15–2.54 t/ha. A tendency towards a decrease in the yield of dry mass in single-species crops of galega with an increase in row spacing was noted. In mixtures sown at the same time according to the 3 : 1 scheme, the yield of dry mass was 5.14 t/ha in the first mowing and 4.05 t/ha in the second. This is higher than in the mixture sown according to the scheme “a row of galega + a row of awnless brome” (1 : 1) by 2.2–7.6, or 2.2–13.1%. Awnless brome in mixtures is more competitive than galega. An increase in the seeding rate of awnless brome from 3.0 to 6.0 million germinating seeds/ha in the herbage of galega increased the yield by 0.9–1.37 t/ha. The yield of dry mass of mixtures sown at the same time was higher than mixtures with awnless brome planted between rows of galega with spacing of 15 cm by 2%, and with row spacing of 30 cm by 10%.
Root rot in new cultivars of spring wheat depending on sowing dates
Authors: Razina A. A. , Sultanov F. S. , Dyatlova О. G.
Published: May 2020

The results of studying resistance of mid-ripening spring wheat cultivars to root rot in the forest-steppe zone of Irkutsk region are presented. The study was conducted in a two-factor field experiment. Factor A – mid-ripening spring wheat cultivars: Tulunskaya 11 (control), Zoryana, Маrsianka, Stolypinka (new cultivars). Factor B – seeding dates: May 10, 20, 30, preceded by fallow. The experimental plot area was 70.0 m2. The experiment was repeated three times. Plot arrangement was randomized. Root rot prevalence was determined during the tillering phase of the crop. In 2018, the sowing dates did not affect the disease due to the long spring-summer drought (May-June) and a higher average daily temperature compared to long-term average values. In arid and cold conditions of May 2019, with the late sowing period (May 30), root rot prevalence was significantly lower than when sowing on May 10 and 20. In 2019, a higher level of the disease was registered than in 2018 by 14.3%. Significant differences in root rot prevalence in both years of research were noted between the control cultivar Tulunskaya 11 and the new cultivars of spring wheat Zoryana and Stolypinka. In the tillering phase of the latter two, disease indicators were lower by 5.6% and 10.5% in 2018, and by 8.8% and 7.9% in 2019, respectively. Маrsianka cultivar was at the control level for this indicator. The best cultivar under study was Stolypinka, which was not only less affected by root rot, but also gave a statistically significant yield increase of 0.16 t/ ha in 2018 and 0.22 t/ha in 2019.
Using web search queries to monitor influenza-like illness: an exploratory retrospective analysis, Netherlands, 2017/18 influenza season
Authors: Schneider Paul P , van Gool Christel JAW , Spreeuwenberg Peter , Hooiveld Mariëtte , Donker Gé A , Barnett David J , Paget John
Published: May 2020

Background

Despite the early development of Google Flu Trends in 2009, standards for digital epidemiology methods have not been established and research from European countries is scarce.

Aim

In this article, we study the use of web search queries to monitor influenza-like illness (ILI) rates in the Netherlands in real time.

Methods

In this retrospective analysis, we simulated the weekly use of a prediction model for estimating the then-current ILI incidence across the 2017/18 influenza season solely based on Google search query data. We used weekly ILI data as reported to The European Surveillance System (TESSY)  each week, and we removed the then-last 4 weeks from our dataset. We then fitted a prediction model based on the then-most-recent search query data from Google Trends to fill the 4-week gap (‘Nowcasting’). Lasso regression, in combination with cross-validation, was applied to select predictors and to fit the 52 models, one for each week of the season.

Results

The models provided accurate predictions with a mean and maximum absolute error of 1.40 (95% confidence interval: 1.09–1.75) and 6.36 per 10,000 population. The onset, peak and end of the epidemic were predicted with an error of 1, 3 and 2 weeks, respectively. The number of search terms retained as predictors ranged from three to five, with one keyword, ‘griep’ (‘flu’), having the most weight in all models.

Discussion

This study demonstrates the feasibility of accurate, real-time ILI incidence predictions in the Netherlands using Google search query data.
Transmissibility of influenza during the 21st-century epidemics, Spain, influenza seasons 2001/02 to 2017/18
Authors: Redondo-Bravo Lidia , Delgado-Sanz Concepción , Oliva Jesús , Vega Tomás , Lozano Jose , Larrauri Amparo ,   the Spanish Influenza Sentinel Surveillance System
Published: May 2020

Background

Understanding influenza seasonality is necessary for determining policies for influenza control.

Aim

We characterised transmissibility during seasonal influenza epidemics, including one influenza pandemic, in Spain during the 21th century by using the moving epidemic method (MEM) to calculate intensity levels and estimate differences across seasons and age groups.

Methods

We applied the MEM to Spanish Influenza Sentinel Surveillance System data from influenza seasons 2001/02 to 2017/18. A modified version of Goldstein’s proxy was used as an epidemiological-virological parameter. We calculated the average starting week and peak, the length of the epidemic period and the length from the starting week to the peak of the epidemic, by age group and according to seasonal virus circulation.

Results

Individuals under 15 years of age presented higher transmissibility, especially in the 2009 influenza A(H1N1) pandemic. Seasons with dominance/co-dominance of influenza A(H3N2) virus presented high intensities in older adults. The 2004/05 influenza season showed the highest influenza-intensity level for all age groups. In 12 seasons, the epidemic started between week 50 and week 3. Epidemics started earlier in individuals under 15 years of age (−1.8 weeks; 95% confidence interval (CI):−2.8 to −0.7) than in those over 64 years when influenza B virus circulated as dominant/co-dominant. The average time from start to peak was 4.3 weeks (95% CI: 3.6–5.0) and the average epidemic length was 8.7 weeks (95% CI: 7.9–9.6).

Conclusions

These findings provide evidence for intensity differences across seasons and age groups, and can be used guide public health actions to diminish influenza-related morbidity and mortality.
RESEARCH MANAGEMENT IN THE FACULTY OF SCIENCES
Authors: Dáher Nader Jorge Elías , Panunzio Amelia Patricia , Navarro Marlene Isabel Hernández , Moya Mario Angel Royero
Published: May 2020

Research is considered a function aimed at obtaining new knowledge and its application for the solution to problems or questions of a scientific nature. Management is defined as the set of actions aimed at the development and fulfillment of an activity. Thus, research management is conceptualized as the institutional activity oriented to search, study, knowledge of reality, systematization of this knowledge and its transfer to meet needs and contribute to solving society's problems.

University research management must have a continuous improvement approach based on methodologies that although they are different have as a common denominator: the identification, characterization, evaluation and improvement of the process. The objective of this work is to characterize the management of research in the Faculty of Medical Sciences of an Ecuadorian university.
Sıklaştırma Fonksiyonlu Çizge-Yönlendirilmiş Yinelemeli Fonksiyon Sistemleri
Authors: KOPARAL Fatma Diğdem , ÖZDEMİR Yunus
Published: May 2020

Yinelemeli fonksiyon sistemleri (YFS) fraktal geometrinin önemli araçlarından biridir. Çizge-yönlendirilmiş yinelemeli fonksiyon sistemleri (ÇYFS) ise klasik yinelemeli fonksiyon sistemlerininin bir genelleştirmesi olarak literatürde yer almaktadır. Diğer taraftan, sonlu sayıda büzülme dönüşümü ve bir sıklaştırma dönüşümünden (sabit dönüşüm) oluşan sıklaştırma fonksiyonlu yinelemeli fonksiyon sistemleri de bir başka önemli genelleştirme olarak karşımıza çıkmaktadır. Bu çalışmada ise, sıklaştırma fonksiyonlu çizge-yönlendirilmiş yinelemeli fonksiyon sistemleri, klasik sıklaştırma fonksiyonlu yinelemeli fonksiyon sistemlerinin bir genellemesi olarak tanımlanmış ve bu yeni kavram örneklendirilmiştir. Ayrıca tanımlanan sıklaştırma fonksiyonlu çizge-yönlendirilmiş sistemin atraktörlerinin Hausdorff boyutları üzerinde durulmuştır. Bir sıklaştırma fonksiyonlu YFS’nin atraktörünün Hausdorff boyutu için klasik durumda var olan bir takım sonuçların, bu yeni tanımlanan sistemlerin atraktörleri için de geçerli olduğu gösterilmiştir.
Fonksiyonelleştirilmiş Titanyum Dioksit Nanotüp Sentezi
Authors: TÜRKASLAN Banu , AKTAŞ Melek , AKAR Sultan
Published: May 2020

TiO2 nanotüp sentezi ile ilgili yapılan çalışmalarda belirtilen koşullarda nanotüplerin oluştuğu yönünde sonuçlar verilirken, karakterizasyon sonuçlarının nano malzemenin toz formuna ait olduğu, tübüler yapılara ait formların oluşmadığı görülmektedir. Bu çalışmada titanyum dioksit (TiO2) tozundan hidrotermal sentez yöntemi ile TiO2 nanotüpleri elde edildi. Nanotüp sentezi için deney şartları optimize edildikten sonra elde edilen TiO2 nanotüplerin metakrilik asit ile fonksiyonlaştırma işlemi gerçekleştirildi. TiO2 tozunun yapısı, hidrotermal koşullar (sıcaklık, reaktiflerin konsantrasyonu ve hidrotermal süresi) ve sonraki yıkama işlemleri, TiO2 nanotüp yapısını (kristalografi ve morfoloji) ve fiziksel-kimyasal özelliklerini belirlemede önemli bir rol aldığı gözlendi. Sentezlenen nanotüp yapıları, Enerji Dağılım Spektrometresi (EDS), Fourier Dönüşümlü Kızılötesi Spektroskopisi (FTIR), X-Işını Kırınım Difraktometresi (XRD) ve Taramalı Elektron Mikroskobu (SEM) ile karakterize edildi.
A Study on Mechanical Properties of Dissimilar Steels Welded with Electric Arc Welding
Authors: AYTEKİN Cüneyt , ÇALIK Adnan , UÇAR Nazım
Published: May 2020

Different materials may be used together in order to obtain materials having desired properties. The main objective of this study is to investigate weldability and the mechanical properties of welded AISI 316 and AISI 4140 obtained by the electric arc technique. Mechanical properties were determined by tensile and impact tests. The critical points and Charpy energy value have been determined by means of load-elongation curves and impact test, respectively. The information about mechanical properties has been obtained by determining the hardness values at welding points and points which are closest to them. Microstructure investigations have been carried out using optical microscopy. The obtained results indicate that AISI 316 and AISI 4140 steels will be successfully combined with electric arc welding and used safely in engineering processes.
Dosimetric Comparison of 3D-CRT, IMRT, IMAT and Helical Tomotherapy for Thoracic Esophageal Carcinoma
Authors: OKUTAN Murat , UYANIK Şeyda , KÖKSAL Canan , GÖKSEL Evren , KARAMAN Şule , AKPINAR Yunus , DAĞOĞLU Nergiz , DEMİR Bayram
Published: May 2020

In this study, we compared the dose-volume parameters for treatment of thoracic esophageal cancer with treatment plans for 3D-CRT, IMRT, IMAT and HT. 15 thoracic esophagus patients who were treated in our clinic between 2017-2018 years were selected. PTV volumes were between 205 and 445.4 cc with an average of 355.2 cc. 3D-CRT, IMRT, IMAT and HT radiotherapy plans were created for each patient using the same contours and the same dose planning prescription. Total dose of 50.4 Gy for all patients was planed with 180 cGy dose per a fraction in total 28 fractions. For PTV; when the four treatment techniques were compared, HI values were 3D-CRT 0.84 ± 0.0, IMRT 0.57 ± 0.05, IMAT 0.06 ± 0.013, HT 0.08 ± 0.03 (p <0.05). CI values were found for 3D-CRT as 1.84 ± 0.2, for IMRT as 1.25 ± 0.05, for IMAT as 1.19 ± 0.04, for HT as 1.2 ± 0.06 (p <0.05). IMRT and IMAT techniques provided better OAR protection compared to other techniques in all lung and heart comparisons. The lowest doses for Dmax and D1% of Spinal Cord were provided by HT technique. We found that IMRT, IMAT and HT techniques have lower critical organ doses than 3D-CRT technique for treating torasic esophageal cancer. Considering the current evidence of the relationship between radiation-induced cardiac toxicity in the literature and the dose-volume parameters after treatment for esophageal cancer in our study, we can say that dose plans are better for IMRT and IMAT plans than 3D-CRT and HT in terms of lung and heart doses.
Bir Kaynar Su Reaktör Modellemesinde Np ve Am Yakıt Çubukları için Bazı Nötronik Değerlerin İncelenmesi
Authors: DÜZ Mehtap
Published: May 2020

Bu çalışmada Monte Carlo metodu kullanılarak üç boyutlu kaynar su reaktör (BWR) modellemesinde bazı nötronik değerler incelendi. BWR modellemesinde reaktör koru 8x8 tipinde kare kafeslere ve her kare kafes kendi içinde 7x7 tipinde küçük kare kafeslere bölünerek tasarlandı. Bu çalışmada, yakıt çubuğu olarak % 0,02-0,1 oranlarında Neptünyum (Np) ve Amerisyum (Am) minör aktinitleri, yakıt zırhı olarak Zirkolay-2 (Zr-2), soğutucu olarak su kullanılarak 7x7 tipinde küçük kare kafesler oluşturuldu. 8x8 tipinde kare kafesler içine B4C kontrol çubukları haç şeklindeki bölgede yerleştirildi. BWR modellemesinde % 0,02-0,1 oranlarında Np ve Am yakıt çubukları ve Zr-2 yakıt zırhı için keff, fisyon enerjisi ve depolanan ısınma oranı nötronik değerleri hesaplandı. MCNPX-2.7.0 Monte Carlo metodu ve ENDF/B-VIII.0 nükleer veri kütüphanesi kullanılarak BWR sisteminin üç boyutlu modellemesi tasarlandı.
Yersinia enterocolitica’nın Tespiti için Altın-nanoparçacık ile Güçlendirilmiş Biyosensör Uygulamalarının Geliştirilmesi
Authors: SAVAŞ Sümeyra
Published: May 2020

Yersinia enterocolitica (Y. enterocolitica), Enterobacteriaceae ailesinin bir üyesi olan Yersinia cinsi’ne ait, en yaygın görülen gıda kaynaklı zoonotik patojenlerden üçüncüsüdür. Havyan dışkısı ile kontamine olan kirli sular ile veya enfekte hayvan ile iletişimin bir sonucu olarak, insanlarda enfeksiyona sebep olabilir. Düşük sıcaklıklara dayanabilme özelliği sayesinde, buzdolabında bulunan yiyeceklerde de üremeye devam edebilmektedir. Bu sebep ile patojenin hızlı ve hassas tespiti sağlık açısında önemlidir. Bu çalışmada, elektrokimyasal sistem kullanılarak, Y. enterocolitica’nın tespiti için altın nanopartikül ile güçlendirilmiş bir immünosensörün geliştirilmesi hedeflenmiştir. Çalışmada ticari olarak temin edilen Y. enterocolitica pozitif kontrol ve antikor kullanılmıştır. Standard sandvich assay kullanılarak sensör yüzeye uygulanan immünoassay ile en düşük tespit limiti 102 cfu/ml, altın nanoparçacıklar ile güçlendirilen antikor sensörü ile 37 cfu/ml Y. enterocolitica tampon çözelti içerisinde tespit edilebilmiştir. İmmünoassay’in özgüllüğü, antikora özgül olmayan antijenlerin çapraz reaksiyon oranı ile tespit edilmiştir. Bu çalışma da, standard sandvich assay ve altın nanopartiküller ile güçlendirilmiş sandvich assay prensibi geliştirilmiş ve Y. enterocolitica’nın tespiti için kullanmıştır. Bunun ile birlikte, antikor tabanlı bir enzimatik sensör de, altın nanoparçacıkların ölçüm duyarlılığına etkisi belirlenmiştir. Çalışmada ölçüm için elektrokimyasal sensör cihazı kullanılmış olup, Y. enterocolitica’nın tespitinde kullanılan immünosensör birçok elektrokimyasal biyosensör ile birleştirilebilir.
Pengelolaan Pemangkasan Tanaman Teh (Camellia sinensis (L.) O. Kuntze) di Wonosobo
Authors: Rohmah Naelatur , Wachjar Ade
Published: May 2020

Kegiatan bertujuan mempelajari pengelolaan produksi teh basah hingga menghasilkan teh kering. Kegiatan penelitian juga bertujuan mempelajari secara mendalam serta menganalisis aspek teknis dan pengelolaan pemangkasan yang diterapkan di lapangan. Penelitian dilaksanakan selama empat bulan mulai dari bulan Februari hingga Juni 2013 di Wonosobo, Jawa Tengah. Pengamatan dan pengumpulan data dilakukan secara langsung untuk memperoleh data primer dan tidak langsung untuk memperoleh data sekunder. Secara umum pemangkasan bertujuan untuk meningkatkan produktivitas teh karena pemangkasan dapat merangsang pertumbuhan tunas baru sehingga mampu menghasilkan pucuk yang lebih banyak. UnitPelaksanaan pemangkasan sudah baik dengan tingkat kerusakan cabang yang tidak terlalu tinggi serta tidak dipengaruhi oleh usia ataupun lama masa kerja dari tenaga pemangkas.
Pertumbuhan Tanaman Cengkih (Syzygium aromaticum (L.) Merr Perr) Belum Menghasilkan pada Berbagai Dosis Pupuk Organik dan Intensitas Naungan
Authors: Sulistianingrum Ratih , Wachjar Ade
Published: May 2020

Penelitian ini bertujuan memperoleh dosis pupuk organik dan intensitas naungan yang optimum untuk pertumbuhan maksimum tanaman cengkih belum menghasilkan. Penelitian dilakukan di Kebun Percobaan IPB Cikabayan, Dramaga, Bogor, mulai bulan September 2013 sampai dengan Februari 2014. Rancangan percobaan yang digunakan adalah Rancangan Split Plot dengan dua faktor dan empat ulangan. Petak utama adalah perlakuan naungan dengan empat taraf intensitas yaitu  0% (I1), 25% (I2), 50% (I3) dan 75% (I4), sebagai anak petak adalah pupuk organik dengan lima taraf dosis yaitu 0 kg (P1), 2.5 kg (P2), 5 kg (P3), 7.5 kg (P4) dan 10 kg (P5) per tanaman. Hasil penelitian menunjukkan bahwa, dosis pupuk organik 10 kg per tanaman dapat meningkatkan diameter tajuk tanaman cengkih 30.0% dibandingkan dengan kontrol pada 4 minggu setelah perlakuan (MSP). Intensitas naungan secara tunggal tidak berpengaruh nyata terhadap pertumbuhan tanaman cengkih. Pemberian pupuk organik 2.5 kg per tanaman dengan intensitas naungan 50% dapat meningkatkan tinggi tanaman cengkih sebanyak 20.9% dibandingkan dengan kontrol pada 16 MSP, dan pemberian pupuk organik 5 kg per tanaman dengan intensitas naungan 75% dapat meningkatkan diameter batang tanaman cengkih sebesar 26.9% dibandingkan dengan kontrol pada 12 MSP
Viabilitas Benih Koro (Canavalia ensiformis (L.) DC.) yang Disimpan pada Beberapa Jenis Kemasan dan Periode Simpan
Authors: Febriyanti Furi , Surahman Memen
Published: May 2020

Koro pedang putih termasuk famili Leguminoceae dan dikenal sebagai tanaman substitusi kedelai karena mempunyai kemiripan komposisi kimia benih. Kandungan protein dalam benih menyebabkan benih tanaman legum seperti kedelai memiliki masa penyimpanan yang pendek. Penelitian ini bertujuan untuk mempelajari pengaruh jenis kemasan dan periode penyimpanan pada kondisi ruang simpan berbeda terhadap viabilitas benih koro pedang putih (Canavalia ensiformis (L.)DC.). Penelitian ini menggunakan rancangan petak tersarang dengan dua faktor. Faktor pertama yaitu jenis kemasan dan faktor kedua yaitu periode simpan benih. Koro dikemas dalam empat jenis kemasan (plastik polietilen, karung terigu, karung plastik dan botol kaca) dan disimpan selama enam bulan di ruang suhu kamar dan ruang ber-AC. Hasil penelitian menunjukkan kemasan plastik polietilen dan botol kaca merupakan kemasan yang paling baik untuk penyimpanan benih koro pedang putih selama enam bulan. Viabilitas benih koro pedang putih dalam kemasan tersebut lebih tinggi dibandingkan kemasan karung terigu dan karung plastik untuk kedua ruang penyimpanan. Hasil ini mengindikasikan bahwa benih koro dapat disimpan dalam ruang AC maupun kamar lebih dari enam bulan.
Hubungan Angka Kerapatan Panen dan Sistem Rotasi Panen Dengan Produktivitas Kelapa Sawit (Elaeis guineensis Jacq.) di Sumatera Utara
Authors: Miraza Muhammad Irfan , Surahman Memen
Published: May 2020

Kegiatan berlangsung dari bulan Februari hingga Juni 2014 di kebun Tanjung Jati PTPN II, Sumatera Utara. Pengamatan diuji menggunakan metode kuantitatif yang terdiri dari penjumlahan, rata-rata, dan persentase. Sedangkan uji statistik menggunakan t-student. Rotasi panen, angka kerapatan panen, manajemen tenaga panen dan produktivitas panen merupakan aspek penting dalam kegiatan panen. Berdasarkan hasil analisis yang dilakukan, nilai AKP estimasi dengan realisasi tidak berbeda nyata. Tenaga panen menjadi sangat menentukan bagi produksi kelapa sawit. Tingkat kedisiplinan tenaga panen yang masih tergolong rendah sebagaimana terlihat pada mutu hanca menjadi salah satu masalah yang harus diperhatikan  untuk lebih meningkatkan kualitas produksi perusahaan.  Produktivitas kelapa sawit di kebun belum sesuai dengan standar Marihat.
Karakterisasi Tomat M1 Hasil Iradiasi Sinar Gamma 495 Gy
Authors: Hasanah Uswatun , Sutjahjo Surjono Hadi , Marwiyah Siti
Published: May 2020

Penelitian ini bertujuan untuk memperoleh informasi keragaan tanaman tomat M1 hasil iradiasi sinar gamma dosis 495 Gy. Bahan yang digunakan merupakan 40 genotipe benih tomat hasil eksplorasi yang diberi perlakuan iradiasi sinar gamma 495 Gy. Penelitian ini dilaksanakan di Kebun Percobaan Leuwikopo dan Laboratorium Pascapanen Departemen Agronomi dan Hortikultura, Institut Pertanian Bogor  pada bulan November 2014 hingga Maret 2015. Karakterisasi dilakukan dengan membandingkan karakter kualitatif dan kuantatif antara genotipe M1 dan M0. Hasil penelitian menunjukkan perlakuan sinar gamma menyebabkan adanya keragaman pada keragaan genotipe, baik pada karakter kualitatif maupun kuantitatif. Terdapat beberapa genotipe M1 yang memiliki keragaan kualitatif  berbeda dibandingkan kontrolnya yaitu Kefaminano 6, Kefaminano 4, Situbondo GL, Lombok 4, Lombok 1, Gondol 2, Kudamati 1, Aceh 1, Makassar 3, Bogor Cibanteng, Berlian, CLN 4046, dan Kemir. Berdasarkan bobot panen didapatkan tiga genotipe dengan produksi lebih unggul dibandingkan dengan tanaman kontrol yaitu Aceh 5, Lombok 4, dan Kefaminano 4.
Pengaruh Spiritualitas Kerja terhadap Keterlekatan Karyawan melalui Kepuasan Kerja pada UKM Kota Bogor
Authors: Janah Nur , Sukmawati Anggraini , Afendi Farit Mochamad
Published: May 2020

The Quality human resources are needed in global economic competition. Spirituality in work becomes a solution developed by companies, because it can be created a conducive environment for employees to work as good as possible. The purpose of this study is to analyze the influence of work spirituality on employee engagement through job satisfaction in Small and Medium Enterprises cluster of food and beverages in the city of Bogor. This research used Structural Equation Modeling PLS for data analysis. Samples are SMEs that have at least 5 employees and have been registered in the Department of Industry and Trade (Disperindag) and the Department of Cooperatives and SMEs Bogor City. So that 25 SMEs are eligible, consisting of 65 people consisting of employees and owners of SMEs. Sampling method using purposive sampling. The results showed that the spirituality of work has a positive effect directly on employee engagement and indirectly influence through job satisfaction on employee engagement to the organization. Meanwhile, job satisfaction has a direct positive effect on employees'  engagement to the organization. Therefore, increased employee engagement to SMEs is suggested through several supporting activities such as: communicating and facilitating the need for spirituality in the workplace.
PENGARUH PARTISIPASI DAN KOMITMEN ORGANISASI TERHADAP KINERJA MANAJERIAL: KOMITMEN ORGANISASI SEBAGAI VARIABEL MODERATING
Authors: Putri Yulia , Novita
Published: May 2020

This study aims to determine: (1) Effect of Budget Participation on Managerial Performance, (2) Effect of Organizational Commitment on Managerial Performance, (3) Effect of Organizational Commitment to Moderate the Relationship Between Budget Participation and Managerial Performance. The research data was collected using questionnaire techniques. The number of samples in this study were 42 respondents Structural Officials at one of the private universities in Jakarta. The sampling technique uses purposive sampling. Data analysis method uses Partial Least Square (PLS) method, the analysis is carried out through three stages, namely outside model analysis, internal model analysis, and hypothesis testing. The results of this study indicate the effect of budgeting participation has a positive and significant effect on managerial performance, the second hypothesis shows organizational commitment has a positive and significant effect on managerial performance, and the third hypothesis indicates that moderate organizational commitment has a positive influence and significant influence on participation participation relationships budget with managerial performance.
PERTUMBUHAN BIBIT RUMPUT LAUT (Kappaphycus alvarezii) HASIL KULTUR JARINGAN DENGAN BERAT BIBIT YANG BERBEDA
Authors: Cokrowati Nunik , Sri Ismariani Baiq , Nikmatullah Aluh
Published: May 2020

Penelitian ini bertujuan untuk mengetahui pengaruh berat bibit kultur jaringan yang berbeda terhadap pertumbuhan rumput laut Kappaphycus alvarezii dan untuk mengetahui berat bibit hasil kultur jaringan yang optimal untuk pertumbuhan rumput laut jenis Kappaphycus alvarezii. Penelitian ini menggunakan Rancangan Acak Lengkap (RAL) yang terdiri atas 4 perlakuan menggunakan bibit hasil kultur jaringan dengan perbedaan berat bibitnya.Perlakuan tersebut adalah P1 : bibit dengan berat 50 gr, P2 : bibit dengan berat 75 gr, P3 : bibit dengan berat 100 gr, P4 : bibit dengan berat 125 gr. Perlakuan diulang sebanyak 4 kali (4 rakit). Data variabel penelitian yang diperoleh, ditabulasi menggunakan mikrosof excel dan dianalisis menggunakan analisis sidik ragam (ANOVA) pada taraf nyata 5%, kemudian dilakukan uji lanjut dengan uji Least Significant Difference (LSD). Hasil pertambahan berat tertinggi didapat pada berat 125 gr dan laju pertumbuhan tertinggi pada berat 50 gr, dimana pada setiap perlakuan ini berpengaruh (p<0.05) berat bibit terhadap pertumbuhan. Hal ini berkaitan dengan persaingan setiap individu rumput laut dalam menyerap cahaya matahari untuk fotosintesis. Berat bibit merupakan salah satu faktor teknis yang dapat berpengaruh terhadap pertumbuhan rumput laut dan juga jumlah kepadatan disetiap ikatan rumput laut perlu diperhatikan agar tidak terlalu padat sehingga dapat menyebabkan rumput laut rontok.
PENGARUH JENIS PAKAN YANG BERBEDA TERHADAP PERTUMBUHAN DAN KELANGSUNGAN HIDUP IKAN MANFISH (Pterophyllum scalare)
Authors: Ratihpangesturahayu  , Damayanti Ayu Adhita , Setyono Bagus Dwi Hari
Published: May 2020

Penelitian ini bertujuan untuk mengetahui jenis pakan yang menunjang pertumbuhan dan kelangsungan hidup yang tinggi untuk ikan Manfish. Penelitian ini dilaksanakan selama 30 hari, yang bertempat di Instalasi Sendiri. Penelitian ini dilakukan dengan metode eksperimental dengan menggunakan Rancangan Acak Lengkap (RAL) dengan 4 perlakuan dan 3 kali ulangan. Perlakuan yang diberikan adalah pemberian pakan yang berbeda dan masing-masing perlakuan diulang 3 kali. Perlakuan yang diberikan yaitu : Perlakuan 0 (kontrol) : pemberian pakan menggunakan tubifex, Perlakuan 1 : pemberian pakan mengunakan jentik nyamuk, Perlakuan 2 : pemberian pakan mengunakan udang rebon, Perlakuan 3 : pemberian pakan kombinasi cacing darah dan udang rebon. Parameter yang di amati yaitu, panjang mutlak, berat mutlak, pertumbuhan spesifik, tingkat kelangsungan hidup dan kualitas air. Hasil menunjukkan setiap perlakuan tidak adanya pengaruh nyata perbedaan jenis pakan terhadap pertumbuhan dan kelangsungan hidup ikan manfish.
Pemberdayaan Masyarakat Dusun Pengantap Kabupaten Lombok Barat Melalui Program “Bakat Militan Emas”
Authors: Handika Fahmi , Saputra M. Vergiawan , Jihad Sujud Alfanza , Ganevia Nurul Rizkiaeni , Safana Mega
Published: May 2020

Abstract: Dusun Pengantap merupakan salah satu dari 10 wilayah minapolitan rumput laut di NTB. Masyarakat Dusun Pengantap sebagian besar bermatapencaharian sebagai petani rumput laut.   Disisi lain, bencana gempa bumi yang melanda pulau Lombok beberapa waktu lalu berdampak terhadap kapasitas produksi rumput laut pada dusun tersebut. Hal ini diperparah dengan kondisi masyarakat yang memiliki tingkat pendidikan yang rendah dan pasifnya kelompok rumput laut di Dusun Pengantap. Tujuan Kegiatan Pengabdian Kepada Masyarakat adalah untuk menghidupkan kembali kelompok pengolahan rumput laut di Dusun Pengantap serta meningkatkan skill pengolahan rumput laut agar dapat memiliki value added.  Kegiatan Pengabdian kepada masyarakat ini dilaksanakan dengan sebuah program yang diberi nama BAKAT MILITAN EMAS (Bangun Masyarakat Minapolitan Rumput Laut Eucheuma Spinosum). Kegiatan pengabdian kepada masyarakat ini dilaksanakan selama 4 bulan agar dapat memberikan pendampingan intensif. Kegiatan pengabdian kepada masyarakat terdiri atas kegiatan sosialisasi, pretest dan posttest dengan kuisioner, pelatihan dan pendampingan serta  pemasaran. Kegiatan pengabdian kepada masyarakat  diikuti oleh 10 orang peserta dari Dusun Pengantap Kecamatan Sekotong Kabupaten Lombok Barat. Hasil pelaksanaan kegiatan pengabdian kepada masyarakat berhasil diproduksikan sebuah  produk Dodol Rumput Laut Tematik (DORATA) dengan berbagai varian bentuk, warna dan rasa.