bluuebunny/crossref_metadata_2025 huggingface dataset:
A LOGÍSTICA REVERSA DE PNEUS:
Authors: Muinos Villela Gabrielle Oliveira , Silva Fábio Braun
Published: July 2019

A preocupação com a destinação adequada de pneus inservíveis e os impactos ambientais provenientes de seu descarte irregular são questões fundamentais para os órgãos ambientais nacionais. O ciclo de vida dos produtos está cada vez menor e esta realidade leva a pensar em possibilidades de reaproveitamento para os resíduos. O espaço disponível em aterros sanitários está reduzido e a logística reversa surgiu como possibilidade de mitigar este problema, porém precisa ser feita de forma planejada e, sobretudo ser viável. Há inúmeras dificuldades de executar este serviço no Rio de Janeiro, especialmente por causa de suas características geográficas. A presença da Comlurb em todas as partes do município do Rio de Janeiro facilita a operação do fluxo reverso de pneus. O objetivo deste artigo é analisar o processo da logística reversa de pneus usados desde sua coleta até a sua reutilização ou reciclagem para outra finalidade.
JIT inventory control and manufacturing SME performance
Authors: Mtar Kais , Smondel Aymen
Published: July 2019

Relying on the matching method that D.B. Rubin developed in 1974, this study empirically evaluates the impact of the just-in-time (JIT) inventory-control technique on the performance of small and medium enterprises (SMEs), engaged in manufacturing. Data were gleaned from two merged databases: ‘Diane’, and the ‘Organizational Change and Computerization’ survey, the latter carried out in 2006 by The French National Institute for Statistics and Economic Studies (INSEE). Ergo, the study sample consists of 1109 manufacturing SMEs, operating in France. One of a few works of its kind, the empirical study’s contribution highlights the positive effect of JIT implementation on SME turnover, SME value added and SME labor productivity. Despite its limitations, the study offers pragmatic policymaking recommendations for manufacturing SMEs, as well as pertinent future-research directions.
Should I stay or should I go? Foreign-student intent in China
Authors: Iqbal Kashif , Peng Hui , Hafeez Muhammad , Hashim Khan Noor , Ahmad Khurshaid , Iqbal Zeeshan
Published: July 2019

The People’s Republic of China (PRC) has become an international student destination, a phenomenon that requires researching its consequences and implications. This study investigates influences on international students’ decision to leave or to stay in China after completing their studies. Through a snowball sampling technique, empirical data were gleaned from 283 foreign students in different universities in China. Using a binary logit model, the results show that the majority of respondents wish to stay and to work in China. While most foreign students value high wages, many prefer the working conditions and lifestyle in China. Yet some students are cynical about the limited job opportunities for foreigners in China, which compel them to leave after completing their studies. Despite its limitations, this empirical study not only provides pertinent future-research paths but also policymaking recommendations.
Treatment with scFv-h3D6 Prevented Neuronal Loss and Improved Spatial Memory in Young 3xTg-AD Mice by Reducing the Intracellular Amyloid-β Burden
Authors: Esquerda-Canals Gisela , Roda Alejandro R. , Martí-Clúa Joaquim , Montoliu-Gaya Laia , Rivera-Hernández Geovanny , Villegas Sandra
Published: July 2019

The intracellular deposition of amyloid-β (Aβ) peptides has been described in the brains of both Alzheimer’s disease (AD) patients and animal models. A correlation between the intracellular amyloid burden and neurodegeneration has recently been reported in a triple-transgenic AD (3xTg-AD) murine model. In the present study, we assessed the effect of scFv-h3D6, an anti-Aβ single-chain variable fragment (scFv) derived from the antibody bapineuzumab, on amyloid pathology in 5-month-old 3xTg-AD female mice, focusing on intracellular Aβ clearance, neuronal survival, and functional abilities. We also examined neuroinflammation and the histology of peripheral organ samples to detect any adverse effects. A single intraperitoneal injection of scFv-h3D6 dramatically reduced intracellular Aβ burden in the deep layers of the cerebral cortex, pyramidal cells layer of the hippocampus, and basolateral amygdalar nucleus. The treatment prevented neuronal loss in the hippocampus and amygdala, while neither astrogliosis nor microgliosis was induced. Instead, an increase in the size of the white pulp after the treatment indicated that the spleen could be involved in the clearance mechanism. Although the treatment did not ameliorate behavioral and psychological symptoms of dementia-like symptoms, the results of cognitive testing pointed to a noticeable improvement in spatial memory. These findings indicated that the mechanism underlying the therapeutic effect of scFv-h3D6 was the clearance of intracellular Aβ, with subsequent prevention of neuronal loss and amelioration of cognitive disabilities. The treatment was safe in terms of neuroinflammation and kidney and liver function, whereas some effects on the spleen were observed.
Real-World Data from a Metastatic Renal Cell Carcinoma Community-Academic Registry: Comparative Outcomes of Progression Free Survival and Overall Survival
Authors: Ramalingam Sundhar , Walker Mark , George Daniel J. , Harrison Michael R.
Published: July 2019

Background:

No studies have looked at comparative outcomes in the treatment of metastatic renal cell carcinoma (mRCC) between academic and community practice settings.

Methods:

We created a joint academic (ACAD) and community (COMM) retrospective registry of patients treated for mRCC. This registry represents a collaboration of an academic research network (Duke Oncology Network; Durham, NC) and a community-based oncology network (ACORN Research; Memphis, TN) of multiple member practices. We compared progression free survival and overall survival between these centers. We included patients diagnosed with mRCC after January 1, 2007 and before February 7, 2011.

Results:

Four hundred and fifty-five patients were captured in the registry including N = 255 COMM patients and N = 200 ACAD patients. Initial analysis of COMM patients showed a median PFS of 6.24 months [95% CI, 5.4, 7.5], 3.88 months [95% CI, 3.0, 4.8], and 3.35 months [95% CI 2.9, 4.4] with first, second, and third line systemic therapy. ACAD patients had longer median PFS estimates of 11.3 months [95% CI, 7.5, 13.6], 4.4 months [95% CI, 2.7, 8.9], and 5.22 months [95% CI, 2.7, 6.3] respectively. Median OS was 12.06 months [95% CI 8.7, 15.4] among COMM patients and 36.73 months [95% CI 26.2 42.2) among ACAD patients. Differences persisted with inclusion of well-established prognostic models and predictive factors such as treatment exposures.

Conclusions:

There may be differences between outcomes for mRCC patients in community versus academic settings; however rselection most likely plays a role and we need further studies to determine reasons for these potential disparities. A prospective metastatic renal cell carcinoma (MaRCC) registry has been accrued encompassing sixty academic and community treatment sites across the United States rwith the goal of examining real-world treatment patterns and outcomes; MaRCC may shed further light on any potential outcomes differences.
Bumetanide: A review of its neuroplasticity and behavioral effects after stroke
Authors: Tao Dongxia , Liu Fangxi , Sun Xiaoyu , Qu Huiling , Zhao Shanshan , Zhou Zhike , Xiao Ting , Zhao Chuansheng , Zhao Mei
Published: July 2019

Stroke often leads to neuronal injury and neurological functional deficits. Whilst spontaneous neurogenesis and axon regeneration are induced by ischemic stroke, effective pharmacological treatments are also essential for the improvement of neuroplasticity and functional recovery after stroke. However, no pharmacological therapy has been demonstrated to be able to effectively improve the functional recovery after stroke. Bumetanide is a specific Na+-K+-Cl– co-transporter inhibitor which can maintain chloride homeostasis in neurons. Therefore, many studies have focused on this drug’s effect in stroke recovery in recent years. Here, we first review the function of Na+-K+-Cl– co-transporter in neurons, then how bumetanide’s role in reducing brain damage, promoting neuroplasticity, leading to functional recovery after stroke, is elucidated. Finally, we discuss current limitations of bumetanide’s efficiency and their potential solutions. These results may provide new avenues for further exploring mechanisms of post-stroke functional recovery as well as promising therapeutic targets for functional disability rehabilitation after ischemic stroke.
FORMULATION AND EVALUATION OF TOPICAL HERBAL GEL FOR TREATMENT OF ACNE
Authors: K R, Sushmitha , Kopparam Manjunath , Kulkarni Suresh V
Published: July 2019

The objective of the study was to develop a topical herbal gel for the treatment of mild acne vulgaris. Aqueous extracts Withania somnifera formulated using different gelling agent like carbopol-934, Xanthan gum, & HPMC K100 M. Nine formulations of the gel were prepared by varying the proportions of polymer and evaluated for their physicochemical properties like appearance, pH, spreadability, viscosity, assay, and microbial assay. FTIR studies reveals that there was no interaction between the Withania somnifera and selected polymers Carbopol 934, Xanthan gum and HPMC K 100 M. In vitro drug diffusion studies showed percentage CDR of 100.16 % at the end of 3 hours. The microbial assay of all the formulations demonstrated better inhibitory activity against Staphylococcus epidermidis compared to the marketed clindamycin phosphate gel. The stability study carried out of the selected gel F2 at room temperature and 40 ± 2 °C / 75 ± 5 % RH was found to be stable for a period of 45 days in terms of drug content, physical appearance and pH etc. Based on these results, Formulation F2 containing 1.5 % carbopol-934 was selected as best formulation.

Key words: Herbal gel, Withania somnifera, In vitro diffusion, Zone of inhibition.
Sleep-disordered breathing and neurobehavioral symptoms in children in a Southeast Nigerian city
Authors: Ayuk Adaeze Chikaodinaka , Uwaezuoke Samuel Nkachukwu , Ndu Ikenna Kingsley , Iloh Kenechukwu Kosisochukwu , Bisi-Onyemaechi Adaobi Ijeoma , Ndukwu Chizalu Ifeyinwa , Ekwochi Uchenna , Asinobi Isaac Nwabueze , Nduagubam Obinna Chukwuebuka , D I Osuorah Chidiebere
Published: July 2019

Introduction: Sleep-related breathing difficulties can lead to neurobehavioral symptoms in children. They can be assessed through validated screening questionnaires. Objective: This study aims to determine the prevalence of sleep-disordered breathing (SDB) among children, as well as neurobehavioral symptoms and associated risk factors. Materials and Methods: Descriptive cross-sectional study was conducted using the pediatric sleep questionnaire to assess sleep habits such as snoring and sleep apnea; neurobehavioral symptoms such as easy distractibility and disruptive behavior. The sample size of the study was 400 participants consecutively enrolled from consenting households in the enumeration areas in Enugu, Southeast Nigeria. Percentage prevalence of neurobehavioral symptoms was calculated, and SDB scores assigned with the determining cutoff score of >0.33. Analyses for an association of SDB score with socio-economic class (SEC), age, and gender, were performed using relevant statistics. Results: Of the 338 children aged between 2 and 18 years, 47% (158) were males. Children between 2 and 5 years represented 30% (101), while 59% (110) and 11% (46) were children 5–10 years and >10 years, respectively. The mean age of all participants was 6.4±3.1 years, 10% (34) belonged to SEC one while 49% (164) and 41% (139) belonged to middle and lower classes, respectively. At least one of SDB symptoms was present in 73% (248) of participants, but the SDB criteria score was met by 45 participants giving a prevalence of 13.3%. The most prevalent neurobehavioral symptoms were bed wetting in 56.8% (192), easy distractibility in 50.9% (167), and excessive day time sleepiness in 41.3% (139) cases. SDB was more likely in children with up to seven neurobehavioral symptoms, with an odds ratio of 8.27 (CI 3.48–19.66). Conclusions: SDB prevalence rate was found to be high in the present estimated pediatric population. The presence of seven or more neurobehavioral symptoms was associated with SDB and was predominant in children aged between 5 and 10 years.
Serum ferritin as a diagnostic marker for cardiac iron overload among beta-thalassemia major children
Authors: Majhi Subash Chandra , Mishra Nihar Ranjan , Panda Prakash Chandra , Biswal Sumeet Soumyaranjan
Published: July 2019

Introduction: Beta-thalassemia major is the most common chronic hemolytic anemia. It is a well-comprehended fact that the toxic effects of iron overload particularly the cardiomyopathy are the major complication that roots from beta-thalassemia major children. Therefore, timely diagnosis is crucial to optimize the long-term gain. Objective: The objective of the study is to find the cutoff level of serum ferritin for early diagnosis of cardiac iron overload. Materials and Methods: This study was an observational analytical cross-sectional diagnostic study which was conducted from November 2016 to October 2018. With due approval of Institutional Ethics Committee and after taking proper informed consent from the parents and/or legal heir, 105 thalassemic children were enrolled in the study by simple consecutive sampling after satisfying the pre-defined inclusion and exclusion criteria. In this study, two-dimensional Doppler echocardiography was used to detect cardiac iron overload. Serum ferritin levels were estimated, and cutoff values were calculated for each of the echocardiographic parameters of cardiac iron overload, i.e. ejection fraction (EF), left ventricular end-diastolic diameter (LVEDD), and left ventricular end-systolic diameter (LVESD) by receiver operating characteristic curve analysis. Sensitivity (Sn), specificity (Sp), positive predictive value, and negative predictive value were calculated with considering p<0.05 as statistically significant. Results: The mean age of the study participants was 9±3 years. Cutoff value of serum ferritin for detecting abnormality in EF was 3286 ng/ml with Sn of 76.1% and Sp of 88.1%. Similarly, for detecting abnormal LVEDD, cutoff value of serum ferritin was 4640 ng/ml with Sn of 70.1% and Sp of 98.6%, and for LVESD, it was 3286 ng/ml with Sn of 90% and Sp of 70.5%. Conclusion: The serum ferritin level can be used as a reliable marker of myocardial iron overload among childhood beta-thalassemia and hence can be used as an important screening tool.
Pattern of respiratory diseases among human immunodeficiency virus-infected children in Enugu, Nigeria
Authors: C Ayuk Adaeze , C Ubesie Agozie , K Iloh Kenechukwu , Obumneme-Anyim Ijeoma N , J Emodi Ifeoma , S Ibeziako Ngozi , J Anikene Chukwuemeka , J Enemuo Eziamaka , Iloh Ogochukwu , Nwogu Uloma
Published: July 2019

Introduction: The lung is a major target for infectious and non-infectious complications of human immunodeficiency virus (HIV) infection. Objective: This study sought to assess the prevalence and pattern of respiratory diseases among HIV-infected children attending our pediatric HIV specialist clinic. Methods: A 10-year retrospective review of data on HIV-infected children seen at the Paediatric HIV clinic of the University of Nigeria Teaching Hospital, Ituku/Ozalla, Enugu. HIV diagnosis was made by HIV-DNA polymerase chain reaction testing and antibody testing depending on the age of the child. Diagnosis of pneumonia was made using the WHO pneumonia clinical algorithm while pulmonary tuberculosis(PTB) was diagnosed using clinical and radiological criteria. Data analyses were done with Statistical Package for the Social Sciences version 19 (Chicago, IL). Results: A total of 555 HIV-infected children were analyzed. There were 277 males (49.9%) with male to female ratio of 0.9–1. The cough was the most common complaint in 51.9% of the children. There were327 respiratory cases observed in 181 of 555 (34.7%) of the children. Using clinical symptoms, 65 of 327 (9.9%) of study participants had upper airway-related diseases with otitis media being most predominant (27/65; 41.5%); pneumonia was reported in 146 of 327 (45%) and PTB in 115 of 327 (35%). Total 124 of 181 children (72.5%) with respiratory infectionscompared to 18 of 287 (6.3%) without infections had an abnormal chest X-ray (CXR) (p<0.001). Identified risk factors for developing respiratory disease were low socio-economic status, being on second-line highly active antiretroviral therapy and having an abnormal CXR finding. Conclusions: Pneumonia and PTB are common in children with HIV. Chronic radiologicalchange is more common among HIV-infected children with clinical features of respiratory pathology. The need for close lung function monitoring in children with HIV is recommended for early detection of morbidity associated with these infections.
Prevalence of thrombocytopenia in neonatal sepsis
Authors: Chate Sambhaji , Holikar Sunil , Nagare Suyog
Published: July 2019

Background: The problem of neonatal sepsis is enormous in India and many hospital-based studies have revealed an incidence of 30/1000 live births. Objectives: The objectives of this study were to assess the prevalence of thrombocytopenia in culture-positive neonatal sepsis and to observe the outcome of these neonates. Methods: It was a retrospective observational study which was conducted in neonatal intensive care unit (NICU) of a Rural Medical College between September 2018 and December 2018. We have analyzed the records of all the neonates who were admitted at the hospital during this period. We have only included the cases who were culture positive for sepsis and were below 28 days of age. Data were analyzed statistically and p<0.05 was considered to be statistically significant. Results: About 54 neonates who had culture-positive sepsis and thrombocytopenia treated in NICU. Of 54 culture-positive neonates, the most common isolated microorganism was Klebsiella pneumoniae (21, 38.88%) followed by Pseudomonas (15, 27.77%), Staphylococcus (9, 16.66%), and Escherichia coli (9, 16.66%). Thrombocytopenia was present in 49/54 (90.74%) cases. As per severity grading, severe thrombocytopenia was found in 21 (42.86%) neonates, moderate in 17 (34.69%), and mild in 11 (22.45%). The mortality rate among newborns with sepsis was 32.65%. The average period for platelets to rise >100,000/mm3 was 5.0 days (interquartile range 4.0–7.0). Conclusion: Severe thrombocytopenia was commonly associated with neonatal sepsis. Antibiotics covering these groups of bacteria can be started empirically after collecting the required investigations.
Prune-Belly syndrome in 2 cases seen in a tertiary medical institution Southeast Nigeria – A case report
Authors: Uzoamaka Muoneke Vivian , Ikenna Nwokoye , Obumneme Ezeanosike , Benson Onyire Nnamdi , Linda Nwokeji-Onwe , Olapeju Daniyan , Olugbenga Oduneye
Published: July 2019

Prune-Belly syndrome is a rare congenital disorder, and in underdeveloped and developing countries, the outcome is not well known as only a few isolated cases have been reported. A review of 2 male neonates admitted and managed for Prune-Belly syndrome in the neonatal unit of the Pediatric Department of the Federal Teaching Hospital of Nigeria. This appears to be the very first of such cases to be seen at this hospital. Both babies were delivered outside this tertiary institution and eventually referred here for proper diagnosis and management. Two male neonates aged 2 and 3 days, respectively, were admitted in the same month with a common history of maternal febrile history, poor cry on delivery, and oligohydramnios in one of them. Clinical examination showed scaphoid, lax, and wrinkled abdomen with visible peristalsis and flank fullness, ballotable kidneys, distended bladder, well-formed phallus, small scrotum, and absent testes. There were also musculoskeletal abnormalities ranging from lower limb dysgenesis to clubbing of the feet. Prune-Belly syndrome presents with a spectrum of features which present an overwhelming challenge to both the parents and the managing physician, especially in most resource-poor countries.
Population fluctuations of Gynaikothrips ficorum (Marchal, 1908) (Thysanoptera, Tubulifera) and natural enemies on leaf gall of Ficus retusa in Algeria
Authors: Ziouani, Kh. , Benzehra A. , Saharaoui L.
Published: July 2019

Monthly fluctuations of thrip populations on Ficus retusa were monitored and parasites and predators in Boudouaou, Algeria, were identified. Twenty leaves were collected fortnightly from 30 trees from January to December 2015. The number of eggs increased significantly in August with 11,163 eggs and was slightly higher in October with 11,471 eggs. Presence was rare in spring and winter. The 1st and 2nd larval stages (L1 and L2) overlapped: L1 were present from August to October with 27 and 51individuals respectively, and L2 were present from August to December with 65 to 186 individuals respectively. Prepupae were active in April and June, reaching 46 and 50 individuals respectively, before increasing to 266 in November. Highest numbers of pupae were observed in June (171) and July (135). The number of adults gradually increased, reaching a maximum of 642 in early December. Two predators were identified: Montandoniola confusa (Hemiptera, Anthocoridae) and Nephus peyerimhoffi (Coleoptera, Coccinellidae). A parasite, Tetrastichus gentilei (Hymenoptera, Eulophidae), was also later identified.
Coleoptera of Genting Highland, Malaysia: species richness and diversity changes along the elevations
Authors: Musthafa M. M. , Abdullah F.
Published: July 2019

The objective of this study was to measure beetle richness and diversity in Genting Highland at four major elevations (500 m, 1,000 m, 1,500 m and 1,800 m). Beetles were collected using light traps, malaise traps and pitfall traps. Altogether, 1,499 beetle samples representing 156 morphospecies were collected. Light trap and pitfall traps were more effective than Malaise trap. The 500 m elevation band displayed high species richness, abundance and diversity with all indices showing a decreasing pattern. The species accumulation curve displayed a progressive asymptote for all the altitudinal transects, showing the sampling effort was sufficient for this study. A long-term monitoring program of beetle diversity and distribution is useful to test abiotic factors that might influence biodiversity. This study also serves as a benchmark for further studies on this highly disturbed montane cloud forest in Peninsular Malaysia and will be useful to implement effective conservation management, particularly under the threat of climate change.
KONSEP KEPRIBADIAN GURU MENURUT IBNU SAHNUN
Authors: Pratama Arizqi Ihsan , Musthofa Musthofa
Published: July 2019

The purpose of this study was to Analyze the Concept of Teacher Personality according to Ibn Sahnun's Perspective. The research conducted is library research, namely research that uses ways to obtain information data by utilizing existing facilities in the library, such as books, magazines, documents, records, historical stories. The object of the research that is the focus of the analysis is the Concept of Teacher Personality in Ibn Sahnun's Perspective. In the Book of Adab Al-Muallimin by Ibnu Sahnun there are at least six personality concepts that must be possessed by a teacher, namely: Fair, Taqwa, Ikhlas, Patience, Being Kudwah Hasanah, and Attention to their students.

Abstrak

Tujuan penelitian ini adalah untuk Menganalisis Konsep Kepribadian Guru menurut Perspektif Ibnu Sahnun. Penelitian yang dilakukan adalah penelitian kepustakaan (library research) yaitu penelitian yang menggunakan cara untuk mendapatkan data informasi dengan memanfaatkan fasilitas yang ada di perpustakaan, seperti buku-buku, majalah, dokumen, catatan, kisah-kisah sejarah. Objek penelitian yang menjadi fokus analisis adalah Konsep Kepribadian Guru dalam Perspektif Ibnu Sahnun. Dalam Kitab Adab Al-Muallimin karya Ibnu Sahnun setidaknya ada enam konsep kepribadian yang harus dimiliki oleh seorang guru yaitu: Adil, Taqwa, Ikhlas, Sabar, Menjadi Kudwah Hasanah, dan Perhatian terhadap anak didiknya.
Pengembangan Aplikasi Terintegrasi Sebagai Pusat Data Pengaduan Warga Untuk Layanan Smart City Di Kota Jambi
Authors: Puad Lailyn
Published: July 2019

Jambi is one of 25 cities in Indonesia that are declared eligible to implement Smart City. This is as stated in the signing of the minutes by the Ministry of Communication and Information at the Movement Towards Smart City held in Cibubur in May last year. One of the efforts of the Jambi City Government is to provide digital literacy to the community, creating various types of media that can facilitate bureaucracy, provide space for the community to adapt to emerging technologies by collaborating with communities and academics. This also becomes a solution to the disparity between the community and the government in reporting various kinds of problems that exist in Jambi City. Not to mention the bureaucratic processes at the government level that are usually complex in solving these problems. This study aims to create a media that is able to provide freedom to citizens to share complaints through applications that are integrated directly with field technical implementers to leaders who have decision-making authority to accelerate implementation of the solution of incoming complaints.
Sistem Pendukung Keputusan Penerimaan Pegawai pada Universitas Ekasakti Menggunakan Metode AHP
Authors: Siregar M Ilham A , Mallisza Danyl , Yahyan Wahyuni , Hadi Harry Setya
Published: July 2019

Private companies, government agencies and educational institutions are still experiencing difficulties in selecting employees / employees who are in accordance with their needs and experts in their respective fields. With the increasing number of workers who have different abilities, recruiting new employees requires selection of prospective employees at Ekasakti University, because if this is done manually, it will make it difficult for the staff to receive and also be prone to mistakes in decision making. The decision making system method (Decisions Support System) can be used to help the selection of new employee recipients with the AHP Method. Selection of new employee admissions by the AHP (Analytical Hierarchy Process) method can help solve the case of selecting employee recruitment. The model of applying dynamic logic applied in the AHP (Analytical Hierarchy Process) has the advantage that the selection process provides very flexible results
自动控制系统在高位水池中的应用
Authors: 熊 贵斌
Published: July 2019

高位水池自动控制系统主要是通过水位的自动化检测，来对高位水池当中的水位，进行自动化管理，从而为相应的水资源调度人员，提供系统数据。基于此，文章主要分析了自动控制系统，在高位水池运行体系当中应用的重要性，并在此基础上，分析如何建立自动控制系统，才能更好的管理高位水池。
泵站水闸的施工质量管理与技术应用
Authors: 高 俊
Published: July 2019

就一个水利工程结构来看，泵站水闸结构可以说是非常重要额部分，并且针对其施工质量实施切实的管控工作作用是十分巨大的。在针对水利工程施工质量加以管控工作的时候，务必要充分的联系整个工程的现实情况以及工程结构中的重点对项目施工实施综合分析，这样才能选择最佳的施工方案，这篇文章主要围绕泵站水闸建造中施工技术以及管理工作展开研究，并对水闸工程的质量管理措施进行了探讨。
机电一体化在工程机械中的技术应用分析
Authors: 徐 飞 , 马 守锋 , 李 锐哲
Published: July 2019

现如今，国家发展越来越好，科学技术快速的创新和进步，我国的机电一体化技术也是得到了长足的进步，出现了很多成熟的技术成果，也获得更加广泛的应用，特别是有力的推动了工程机械领域的发展。机电技术本省就具有很强的专业性，越来越的先进技术的结合应用，不断的提升着机械设备的性能，应用范围也更加的广泛，功能更加强大。下面我们就对机电一体化技术在工程机械中的应用进行了简单的介绍和分析。
Uso de programas estadísticos libres para el análisis de datos: Jamovi, Jasp y R
Authors: Sánchez Villena Andy
Published: July 2019

Se hace un análisis y propuesta para el uso de tres programas estadísticos gratuitos: Jamovi, Jasp y R; que son de interfaz simple, intuitiva y amigable. También se señalan sus ventajas. Palabras clave: Programas estadísticos, Jamovi, Jasp, R.
Antibacterial activity of Weissella confusa by disc diffusion method
Authors: Krishnan Manigandan , Dey Debasish Kumar , Sharma Chanchal , Kang Sun Chul
Published: July 2019

A visual experiment was conducted to investigate the antimicrobial potential of cell-free culture supernatant of Weissella confusa (DD_A7) against the foodborne pathogenic bacteria Escherichia coli 0157: H7 by disc diffusion method. The result revealed that DD_A7 exerted effective antibacterial potential to control the growth of E. coli upon treatment with 100 µg/mL of the culture supernatant. This study demonstrated that DD_A7 is a potent probiotic candidate to reduce the risk factor associated with Shiga toxin-producing E. coli.

Video Clip of Methodology:

Duration: 9 min 20 sec   Full Screen   Alternate
Negative cross resistance of Spodoptera litura Fabricius population of tomato to newer molecule spinetoram
Authors: Visnupriya M. , Muthukrishnan N.
Published: July 2019

Field population of Spodoptera litura from tomato ( resistant to the majority of the conventional insecticide molecules) were subjected to the in vivo toxicity of spinetoram 12 SC to assess whether cross resistance exists or not. Untreated larvae of both field and laboratory strains showed no mortality during 48 hours of feeding. After 48 hours of feeding on spinetoram 12 SC treated leaves, LC50s of field larvae were 0.28, 0.93, 3.71 and 7.11 ppm for the 2nd, 3rd, 4th and 5th instars of S. litura respectively. However, in the laboratory strain these values were 1.12, 5.86, 36.72 and 91.55 ppm for 2nd, 3rd, 4th and 5th instars of S. litura respectively. Resistance ratio was 0.25, 0.16, 0.10 and 0.08 for the 2nd instar up to the 5th instar of S. litura.
Invasion and establishment of Bondarâ€™s nesting whitefly, Paraleyrodes bondari Peracchi (Hemiptera: Aleyrodidae) in Indian mainland and Andaman and Nicobar Islands
Authors: Vidya C.V. , Sundararaj R. , Dubey A.K. , Bhaskar Haseena , Chellappan Mani , Henna M.K.
Published: July 2019

Invasion and establishment of Bondarâ€™s nesting whitefly, Paraleyrodes bondari Peracchi in Indian mainland and Andaman & Nicobar Islands is reported. This forms the first report of P. bondari from Andaman & Nicobar Islands. Host range of Bondarâ€™s nesting whitefly in India is discussed. Partial sequence of cytochrome c oxidase I gene for P. bondari is submitted to GenBank (MK333262).
Potensi Pengembangan Komposit Berpenguat Serat Kulit Gaharu Sebagai Material Pengganti Fiberglass Pada Pembuatan Dashboard
Authors: Masdani Masdani , Dharta Yuli
Published: July 2019

The development of industrial in the utilization of composites as a substitute of metal materials that are used is fiberglass. However, fiberglass is considered not environmentally friendly because difficult to decipher. The technology advances, it is now widely used from composite materials with natural fibers.This research was conducted to obtain data about mechanical ability in the tensile strength, impact strength and physical form of Gaharu skin fibers using polyester matrix BQTN 157 with volume fraction variations made by hand lay-up method. This research is expected to be useful in automotive, manufacturing industry and household appliances are environmentally friendly. The maximum value of tensile strength is 34.574 MPa in 45% fiber volume fraction. However, there is a decrease in the tensile strength value in the 50% fiber volume fraction, which is 22,635 MPa, this is due to the large amount of fiber content so that the matrix spread to the fiber is uneven. The maximum impact strength value is 62.76 kJ / m2 at 50% fiber volume percentage. Based on the results of testing the comparison of the fiber and matrix volume fractions greatly affect the tensile strength and impact. The results show tensile and impact tests have met the plastic standards used car dashboards.
ANALISA KENYAMANAN PADA KENDARAAN MULTIGUNA PEDESAAN DENGAN PEMODELAN 8 DOF
Authors: Pranandita Nanda
Published: July 2019

Vehicle suspension system is an important part to minimize the vibration of the vehicle caused by road unevenness. Ideal conditions would be difficult to obtain, especially in rural areas with uneven road conditions. Analysis of passive suspension system in this study is expected to explain the level of comfort in riding Rural Multipurpose Vehicles. Full car modelling with 1 DOF riders used in this study, simulated using numerical simulation software. Excitation roads used in the form of a sinusoidal wave with an amplitude of 0.05 m and a wavelength of 0.5 m. Analysis carried out on the comfort of the vertical acceleration response received driver’s head. Based on the simulation results showed that by using a constant speed between 20-40 km / h, the vehicle will be comfortable driving for more than 2.5 hours.
ALAT DETEKSI KANDUNGAN GAS CO DAN NO2 VIA SMS
Authors: . Yudhi , Febriansyah Aan
Published: July 2019

Increasing the amount of air pollution that causes global warming and the lack of attention to harmful gases such as CO and NO2 can have negative effects on health can even cause death if it is ignored by those who breathe it. And one of the most popular communications media today is mobile. Therefore, it is necessary to create a tool that can monitor air quality levels and by utilizing advances in technology monitoring system can be seen from a far via SMS. In this paper, we use the type ATmega AVR microcontroller unit 16 as a control center and a GSM modem as a network system that handles communication between the microcontroller to the network using the SMS application. In addition, the system uses the C language as the configuration between the microcontroller and mobile network systems. Air pollution levels were measured with gas sensor MQ-7 that serves to measure levels of CO and MQ-5 to measure NO2 levels. The test results of sensor calibration and sensor MQ-5 MQ-7 which issued the ADC output is changed by using the formula provisions ppm ADC becomes a value in accordance with the standards set by ISPU (Air Pollution Standards Index).
Pengaruh Jumlah Input Dan Membership Function Fuzzy Logic Control Pada Robot Keseimbangan Beroda Dua
Authors: Dwisaputra Indra , Mahmoud Tareg , Megayanti Meti , Budiawan Irvan , R Pranoto Hidaya
Published: July 2019

In this paper, a dynamic model of two-wheeled balancing robot has been created, and the two types of FLC has been designed. The Mamdani methods used on both FLC. The first FLC uses pendulum tilt angle theta (?) as the input and it requires the motor torque to keep the robot remains balanced as the output. The second FLC uses two inputs, the first input is theta (?) and the second input is the change in the value of theta (?) which is the output torque of the motor. The second plant model and FLC built by using Matlab Simulink. The first case is one input using 5 membership functions (mf). The second case is two inputs using the 5 and 7 mf. The characteristics and effects of the changes in the input and mf have been simulated in the Simulink and compared. By expanding the number of the inputs can reduce motor specification required in balancing robot. Meanwhile, by increasing the number mf, it can improve the performance of the controller much faster to reach the settling time.
Alat Pendeteksi Denyut Nadi Berbasis Arduino Yang Diinterfacekan Ke Komputer
Authors: Sulistyo Eko
Published: July 2019

Heartbeat/pulse is an important factor in the health sector that determines the health condition ofa person's body. The method of measuring the number of the pulses is still using the manual method bycalculating the rate of the heartbeat/pulse per minute. To know one's pulse, it needs to makemeasurements in the hospital, so not everyone can measure their own pulse. The solution of this problemis the manufacture of human pulse detection device that works automatically in real time and can beconnected with the computer. The purpose of this study is to help people or medical personnel incalculating the pulse rate digitally. The stages of this research is the pulse sensor used to detect thehuman pulse can be put on a three-site measurements, on a finger, ear and forehead, then processed bythe arduino mega 2560 as the central system. The measurement data is Beat Per Minute (BPM) will beshown to the LCD and can be also interfaced into a database using Visual Basic 6.0. The result shows thatthe average pulse measurement by using the tool is 77.3 BPM (Beat Per Minute) and manually is 76 BPM(Beat Per Minute) with the accuracy of this tool reaches 98.32% and it takes 10 seconds to display theaverage value of BPM (Beat Per Minute).
Identifikasi Pola Iris Menggunakan Metode Backpropagation
Authors: Elviralita Yoan , Hidayat Asrul
Published: July 2019

In recent years, there has been a lot of research related to pattern recognition is conducted to identify various forms of patterns and controlling system. Utilizing backpropagation neural network in pattern identifying is very useful to solve problems with unknown parameter and difficult to determined. And then the data of the pattern are trained and tested. The results obtained from the recognition rate indicates a backpropagation neural network, provide excellent performance, which is an average of 98%. This neural network is expected to be developed by other researchers for the advancement of knowledge in all fields.
Optimasi Multirespon Gaya Tekan Dan Momen Torsi Pada Penggurdian Material Komposit Glass Fiber Reinforce Polymer (Gfrp) yang Ditumpuk Dengan Material Stainless Steel (SS) Menggunakan Metode Algoritma Genetika
Authors: Sateria Angga
Published: July 2019

Glass fiber reinforced polymer (GFRP)-stainless steel stacks used in the aircraft structural components. The assembly process of this components requires mechanical joining using bolt and nut. The drilling process is commonly used for producing hole to position the bolt correctly. Thrust force and torque are responses that used to evaluate the performance of drilling process. The quality characteristic of these responses are “smaller-is-better.” The aim of this experiment is to identify the combination of process parameters for achieving required multiple performance characteristics in drilling process of GFRP-stainless steel stacks materials. The three important process parameters, i.e., point angle, spindle speed, and feed rate were used as input parameters. Point angle was set at two different levels, whilethe other two were set at three different levels. Hence, a 2 x 3 x 3 full factorial was used as designexperiments. The experiments were replicated two times. The optimization was conducted by using genetic algorithm method. The minimum thrust force and torque could be obtained by using point angle, spindle speed and feed rate of 118o, 2383 rpm, 62 mm/min respectively.
Rekondisi Mesin Bubut DoALL LT 13 BU01 Di Laboratorium Mekanik Politeknik Manufaktur Negeri Bangka Belitung
Authors: Aswin Fajar , Masdani Masdani , Randa Randa , Yulianto Otniel
Published: July 2019

This paper discusses the process of restoring the original condition (recondition) of DoAll LT 13 Bu01 by focusing on electrical system improvements, geometric precision and machine performance. Direct observation methods are applied to solve problems that include cause and effect relationships using 5 (five) why analyzes. The reconditioning stage starts from the initial data collection of damage obtained by visual inspection, function testing and geometric testing on the machine; then proceed with analyzing the damage; and corrective actions based on the results of the analysis. Functional testing methods, geometric deviation tests, machine performance tests are performed to see the achievement of recondition goals. Based on the results of the tests performed, the function of the electrical system returned to normal, the average value of geometric deviation still satisfied based on ISO-1708 standard and machine performance for spindle rotation value with 5% deviation, the value of the roundness and taper work-piece results of 0 and 0.004mm / 255mm, respectively and spindle vibration in the range of 0.33 - 0.66 mm / s RMS for speed 50 - 2500 RPM is still considered normal based on ISO 10816 standards.
Iptek Bagi Masyarakat (IbM) Kelompok Usaha Pembuat Rusip
Authors: Napitupulu Robert , Rodika Rodika
Published: July 2019

Nabila Rusip is one of the IKM built Disperindag Pangkalpinang City which makes the traditional food of the people of Bangka became popular and famous. This success is inseparable from the role of Local Government of Pangkalpinang City which continues to encourage Nabila Rusip business with the provision of appropriate technology in 2015 in processing fish raw materials for the manufacture of rusip. However, at this time the machine can not be operated again due to operator error in using the tool. The purpose of science and technology for the community of the business group of the russians is to repair the fish pressing machine for the manufacture of rusip which was received by the partner from the Industry and Trade Office of Pangkalpinang City. The implementation method starts from inventorying problems, the process of repair and manufacture of machinery, assembly, testing and lastly provides a brief training on how to operate and maintain the correct machine. The results of this activity obtained the fish machine can be re-operated, productivity Nabila Rusip increase and the sale proceeds to increase.
Alat Bantu Penggerindaan Slideways Mesin Bubut
Authors: Aswin Fajar , Pranandita Nanda , Kiswanto Ary , Hafiz Syahdan , Zaenal Zaenal
Published: July 2019

Lathe is a tool that rotates the work-piece about an axis of rotation to perform various operations such as cutting, sanding, knurling, drilling, or deformation, facing, turning, with tools that are applied to the work-piece to create an object with symmetry about that axis.  There are several considerations that affect the lathe to work well, especially geometrical deviations that affect the quality degradation of the product in terms of shape and dimensions. One of the wear on the slide-way of the lathe can affect geometric aberrations. This paper discusses the design and manufacture of grinding tools to fix the lathes bed that can erode three slide-way planes in a single process to achieve flatness and square alignment with one another. The research method used is the experimental method by collecting the data needed to design the tool through literature study and direct observation to the lathe, then the data is processed to obtain the specification of the tool that will be designed by design method based on Verien Deutche Ingenieuer (VDI) 222 , the design result is then continued with the machining and fabrication process; before assembling, parts of the auxiliary equipment are tested in accordance with the design function indicator; the last stage is testing the tool as a whole to know the achievement of the tool against a predetermined goal. Based on the results of the grinding experiment on the three slideway planes with a feed depth of 0.03mm, the average flatness and alignment values ??are 0.02mm / 300mm and 0.07mm / 300mm, respectively. Based on the ISO 1708 standard on the tolerance of geometrical deviations, the grinding results have not allowed the tolerance. Still need more research about the influence of wear of grinding wheels to the grinding results.
Specialties of the structure and conductivity of the non-aqueous electrolytes based on alkali metal bis (salicyl) borates and bis (oxalate) borates
Authors: Diamant Viktor , Trachevskii Volodymyr , Pershina Katherine , Ogenko Volodymyr , Donchu Chen , Huawen Hu , Min Chen , Xiaowen Wang , Menglei Chang
Published: July 2019

The structure and coordination environment of non-aqueous electrolytes based on bis(salicyl)borates of lithium, sodium, potassium, tetramethylammonium (MeBSB) and bis(oxalato)borates from lithium to cesium (MeBOB) using NMR spectroscopy have been investigated. Bis(salicyl)borates (BSB) and bis(oxalate)borates (BOB) of alkali metals and organic cations are considered as promising electroconductive components of electrolytes of modern chemical sources of current (lithium, sodium ion batteries and super-capacitors). The salts were synthesized by the microwave radiation method. The 13C and 11B NMR spectra analysis determined the presence of symmetric structure in BOB anion and the presence of two optical conformations of the BSB anion with labile coordination environment of boron. The conformations of the BSB are the result of the ion contact pairs formation. In the case of tetramethylammonium cation the presence of conformations are depended on the reactive medium. The conformational lability of the coordination sphere of NaBSB dissolved in DMAA is connected with increasing of the integral intensity of carboxyl group singles relatively signals of carbon atoms in fragments of another functional affiliation when the time delay between radio frequencies varies within 2-15 seconds. The difference in the structure of these anions leads to a change in the thermal dependence of the electrical conductivity of BSB and the transport of ions in non-aqueous solvents. Maximum electrical conductivity of salt solutions in DMFA is achieved at close concentrations of 0.75 m for KBSB and 0.77-1 m for NaBSB. The solubility of BSB is better than the BOB. Based on the measurements of the conductivity and the data of electrochemical impedance spectroscopy (the angle of inclination of spectra in the Nyquist coordinates in the low frequency range, the phase angle shift at a frequency) it was proposed the existence of two ways of ions and charge transfer in the electrolytes: diffusion and relay transport. The possibility of formation of a labile salt complex with a solvent due to hydrogen bonds is established.
ELECTRICAL CONDUCTIVITY AND SORPTION PROPERTIES OF THE COMPOSITES BASED ON ION EXCHANGE POLYMERS
Authors: Maltseva Tetiana , Kolomiets Eugene , Dzyazko Yulliya
Published: July 2019

The review is devoted to the conditions for the creation and functional properties of organіс-inorganic ion-exchange materials, which in the form of sorbents and membranes can be applied in the processes of ion separation, as well as the purification of water and combined solutions of technological origin. The structure of air dry and hydrated organic ion-exchange polymers, conditions for the creation of organiс-inorganic ion-exchange materials, as well as their components, interaction of components and the corresponding classification are considered. Dry ion-exchange materials contain heterogeneities of different sizes, which are formed during the synthesis of polymer, with the smallest heterogeneities represent clusters, and the larger ones are related to crystallinity. The structure of hydrated ion- exchange materials adequately describes the cluster channel model of Hsu and Girke. The number of charged particles transferred corresponds to the contribution of clusters and channels (volume fractions) to total porosity. The size of the clusters and channels can be determined by the method of small-angle X-ray scattering. The complex porous structure of ion-exchange polymers makes it possible to form inorganic particles in the one’s pores. The introduction of inorganic ion exchangers into the polymer leads to the appearance of additional osmotically active centers (fixed ions and antimony modifiers) that influence the compression pressure of composites. Regarding the functional properties of organiс-inorganic materials, data on the influence of the form and size of the nanoparticles of the inorganic component on the electrical conductivity of composites, examples of the use of organiс-inorganic sorbents in ion-exchange columns, and also effective diffusion coefficients corresponding to the exchange of two-charge metal cations (Zn2+, Pb2+, Cu2+, Ca2+, Ni2+) on H+ organic-inorganic sorbents, for the most part, organic resin- Dowex HCR-S with incorporated particles of zirconium hydrophosphate, are presented. The prospect of application of such materials in ion-exchange and membrane processes of separation and purification of aqueous solutions, as well as in the processes of efficient selective extraction of target ions, is shown.
New Case Reports with Phage Therapy-What is Needed for More?
Authors: Moelling Karin
Published: July 2019

A recent article had the provocative title: A wake-up call: we need phage therapy now. Indeed, there are very few sources for phages available if someone needs them urgently. Thus phages are needed and should be produced, characterized and banked and provided upon need, possibly on a European basis.