bluuebunny/crossref_metadata_2025 huggingface dataset:
ADVANCED REMOVAL OF TRICHLOROETHYLENE FROM WATER BY SONOLYSIS, BIOCATALYTIC OXIDATION AND ULTRAFILTRATION
Authors: Stefanescu Mihai , Cristea Ionut , Batrinescu Gheorghe
Published: August 2020

Trichloroethylene (TCE) causes important pollution problems of soil and groundwater in other countries even in this day when its direct application is less than the last century.
This paper emphasized a modern treatment flow for trichloroethylene advanced removal from water based on four phases: sonolysis - biocatalytical oxidation - sonolysis - ultrafiltration. Following this scheme, it is possible to obtain residual TCE content in the effluent approx. 0.01 mg/L, from initial content of 0.5 mg TCE/L. Ultrasonic energy (50-200 kJ) biocatalyst dose (laccase), biocatalytic oxidation time and ultrafiltration separation capacity are the main operating parameters that control the TCE removal efficiency (max. 87%).
IMPLEMENTING AN INNOVATION MANAGEMENT SYSTEM AT NATIONAL RESEARCH AND DEVELOPMENT INSTITUTE FOR INDUSTRIAL ECOLOGY - ECOIND
Authors: Criste Ionel Virgil
Published: August 2020

The paper presents the activities performed for the implementation of the innovation management system integrated into the existing quality, environmental, and occupational health and safety management system of the ECOIND institute. The basic terms used in the project are defined and the international and Romanian standards are explained. The results obtained consist in identifying, introducing and describing the processes related to innovation and establishing the interaction of these processes with the other processes of the management system, establishing the policy and objectives related to innovation, reviewing the system procedures and the quality, environmental and occupational health, and safety management manual to include the innovation processes and elaborating the occupational procedures to keep these processes under control. The paper shows the
main benefits of the innovation management system and the impact of this system for NRDI ECOIND in several aspects: technical, technological, economic, social, and environmental.
ADEQUATE POLLUTION MANAGEMENT - A MUST FOR IMPLEMENTATION OF ‘ONE HEALTH’ CONCEPT
Authors: Arama Georgeta Madalina , Kim Lidia , Nita-Lazar Mihai , Pascu Luoana Florentina , Lehr Carol Blaziu
Published: August 2020

The paper focused on the possible links among pollution, pollution management efficiency including waste management and the propensity of a variety of emerging diseases in our society by answering the question: “How pollution can affect human health?” Environmental pollution is a reality and our planet ecosystem possibilities to face the challenges due to the constant exceeding its resilience are becoming smaller and smaller. The evolution of the climate change indicators like global temperature, global CO2 emissions, oceans acidification and species extinction point out that in a not very long period of time, the planet will not be able to sustain any more the present society’s life style set by the current economic development. Therefore, many warning signals have been issued to change the present behavior in order to reduce significant damages done to the environment and on human health with serious implications on the dysregulation of our immunity and the onset of a plethora of diseases. In this respect, the present paper reviewed relevant aspects linked to the environmental pollution issues that become part of scientific and public debates presented in specialty literature in recent years emphasizing why the implementation of “One Health” concept is necessary.
The Mechanisms Involved in Obesity-Induced Male Infertility
Authors: Heydari Hamed , Ghiasi Rafighe , Ghaderpour Saber , Keyhanmanesh Rana
Published: August 2020

Introduction:

Obesity resulted by imbalance between the intake of energy and energy consumption can lead to growth and metabolic disease development in people. Both in obese men and animal models, several studies indicate that obesity leads to male infertility.

Objective:

This review has discussed some mechanisms involved in obesity-induced male infertility.

Method:

Online documents were searched through Science Direct, Pubmed, Scopus, and Google Scholar websites dating from 1959 to recognize studies on obesity, kisspeptin, leptin, and infertility.

Results:

Obesity induced elevated inflammatory cytokines and oxidative stress can affect male reproductive functions, including spermatogenesis disorders, reduced male fertility power and hormones involved in the hypothalamus-pituitary-gonadal axis.

Conclusion:

There is significant evidence that obesity resulted in male infertility. Obesity has a negative effect on male reproductive function via several mechanisms such as inflammation and oxidative stress.
Nitrogen-doped Carbon Dots from Hutai-8 Grape Skin and their Application in Hg2+ Detection
Authors: Zhang Pan , Zhao Shun-Sheng , Wang Jia-Jia , Liu Xiang-Rong
Published: August 2020

Background:

In recent years, environmental pollution and heavy metal pollution caused by rapid urbanization and industrialization have become increasingly serious. Among them, mercury (II) ion (Hg2+) is one of the highly toxic heavy metal ions, and its pollution comes from various natural resources and human activities. Therefore, people attach great importance to the development of analytical methods for effective analysis and sensitive detection of Hg2+.

Objective:

Using grape skin as a green and environment friendly carbon source to synthesize fluorescent carbon dots and to apply them in detecting the concentration of Hg2+in water.

Methods:

Using "Hutai No. 8" grape skin as a carbon source, fluorescent carbon dots were synthesized by a one-step hydrothermal method. The structure and fluorescent properties of the carbon dots were tested using TEM, XPS, XRD, and other characterization instruments, and their utilization on the detection of mercury ions in the actual water samples was explored.

Results:

The CDs had a particle size of about 4.8 nm and a spherical shape. There were N-H, C-N, C=O, and other functional groups on the surface. It was found that Hg2+has an obvious fluorescence quenching effect on CDs, and thus CDs fluorescence quenching method to detect the concentration Hg2+was established, and the detection limit was 3.7 μM, which could be applied to test the concentration of Hg2+in water samples.

Conclusion:

Using grape skin as a carbon source, fluorescent carbon dots were successfully synthesized by the hydrothermal method. Carbon dots were used to detect mercury ions in water, and a method for detecting mercury ions in actual water samples was established.
Experimental and Numerical Analyses of Steel-concrete Composite Floors
Authors: Francavilla Antonella B. , Latour Massimo , Rizzano Gianvittorio
Published: August 2020

Background:

The performances of composite steel-concrete slabs are strongly influenced by the connection between the concrete and the steel decking, which is essentially assured by bonding, interlocking, and adhesion. The connection can be continuous or localized by means of connectors. In order to increase the bonding between steel and concrete elements and to allow their collaboration, typically, a continuous connection with indentations or embossings is realized.

Objective:

In this study, the simulation of the concrete-steel bond interaction of a typical composite decking is analyzed. In particular, the objective is the investigation of the role of the main geometric parameters of the indentations or embossings that determine the effective functionality of the connection.

Methods:

To this scope, the results of four-point bending tests on five specimens of a typical layout of a composite floor are reported and discussed. Then, the obtained results are used to determine the shear bond strength according to the partial interaction method, by following the procedure provided by the Eurocode 4. Successively, the experimental results are exploited in order to calibrate a FE model in Abaqus software to be able to account for the basic effects involved in the shear bonding mechanism, i.e. interlocking, friction, and adhesion.

Results & Conclusion:

Finally, the obtained results are discussed, and the FE model is used to evaluate the geometrical and mechanical parameters influencing the longitudinal shear bonding resistance.
Childhood Trauma, Reflective Functioning, and Problematic Mobile Phone Use Among Male and Female Adolescents
Authors: Musetti Alessandro , Brazzi Francesca , Folli Maria C. , Plazzi Giuseppe , Franceschini Christian
Published: August 2020

Background:

The association between traumatic experiences, different forms of emotion dysregulation and problematic technology uses is well established. However, little is known about the role of childhood traumatic experiences and reflective functioning in the onset and maintenance of mobile phone addiction symptoms among adolescents.

Methods:

Self-reported measures on childhood traumatic experiences, reflective functioning, and Problematic Mobile Phone Use (PMPU) were administered to 466 high school students (47.1% females) aged 13-19 years old. Participants also reported the number of hours per day spent on using a mobile phone.

Results:

Hierarchical multiple regression analyses showed that increased time spent on the mobile phone, low reflective functioning scores and high childhood trauma scores predicted PMPU scores in the sample. Moreover, two gender-specific pathways were found. Among males, PMPU was positively related to time spent on mobile phone and childhood traumatic experiences and negatively related to reflective functioning. Among females, PMPU was negatively associated with time spent on mobile phone for video gaming and with reflective functioning.

Conclusion:

These results might have relevant clinical implications in highlighting the importance of planning gender-tailored interventions for adolescents who report mobile phone addiction symptoms.
Prevalence of Strox Smoking Among University Students in Cairo, Egypt
Authors: Hashim Ahmed M. M. , Hassan Ahmed M. , El-Din Amin Ghada Essam , Allam Mohamed Farouk
Published: August 2020

Background:

In Egypt, the prevalence rate of New Psychoactive Substances (NPSs) use is severely underestimated. In the last 5 years, several non-scientific reports have demonstrated the presence of an emergent, cheap NPSs that has taken the name of “Strox” or “Egyptian Spice”. The objective of this study was to estimate the prevalence rate of Strox smoking among undergraduate students attending Ain Shams University (ASU), Cairo (Egypt).

Methods:

A cross-sectional study was conducted in five non-medical colleges of ASU, namely, Law, Commerce, Computer Science, Engineering, and Literature. Participants were recruited using a convenient sampling method and were asked about NPSs use. Data were collected using the Marijuana Smoking History Questionnaire (MSHQ) developed by Bonn-Miller and Zvolensky (2009). The questionnaire was translated and modified to reflect Egyptian slang and culture.

Results:

This study included 558 students, 422 (75.6%) males and 136 (24.4%) females. The results showed that 189 (33.9%) were current tobacco smokers, 51 (9.1%) were smokers of substances other than tobacco, 45 (8.1%) were cannabis smokers, 38 (6.8%) were Strox smokers, and 3 (0.5%) were Voodoo smokers. When students were asked about their reasons for smoking Strox, they cited the following motivations: to achieve a feeling of euphoria(28.9%), depression (23.7%), experimentation (23.7%), peer pressure (21.1%), and having excess money (2.6%). The results showed a clear association between tobacco and cannabis smoking and consumption of Strox.

Conclusion:

Although the prevalence rates of NPSs usage as observed in this study were not high, higher rates could be expected in other communities outside of the university. Community-based studies are needed to estimate the magnitude of NPSs use in Egypt and the associated risk factors.
Спектры РКР Co(II)- и Cu-5,10,15,20-тетракис[4-(N-метилпиридил)]порфирина в возбужденном dd-состоянии и механизмы его дезактивации в растворе и комплексах с ДНК
Authors: Ивашин Н.В. , Терехов С.Н.
Published: August 2020

A study of the resonance Raman scattering (RRS) spectra of Co(II)- and Cu-5,10,15,20-tetrakis [4-(N-methylpyridyl)]porphyrin (CoIITMpyP4, CuTMpyP4) in various solvents and in complex with DNA was carried out. Additional lines were found in the RRS spectra of CoIITMpyP4 in a dimethylformamide (DMF) solution containing formic acid as an impurity, as well as for its complex with DNA under nanosecond pulsed excitation. At the same time, under the same excitation conditions, such lines are absent in the spectra of CoIITMpyP4 solutions in pure DMF, dimethyl sulfoxide, water, and alcohols. To interpret the experimental data, we performed calculations of the structure and vibrations for the solvate complexes of CoII - and CuTMpyP4 with water, methanol and formic acid in the ground and in excited states. Based on the data obtained, additional lines in the Raman spectra were assigned to the excited dd-state corresponding to the d(z2) d(x2-y2) transition, the lifetime of which increases with the formation of complexes of CoIITMpyP4 with formic acid. According to the calculation results, this correlates with a decrease in the rate constant of the internal conversion kic due to an increase in the energy gap E between the ground and dd states of CoIITMpyP4. In the case of CoII and CuTMpyP4 binding to DNA, the decrease in kic is due to the additional interaction of the extra-liganding water molecule directly or with the participation of several immobilized DNA water molecules with one of its bases. This complicates the conformational rearrangement of the water molecule in the dd-state, which contributes to an increase in E.
Каскадная генерация второй гармоники с половинным порядком периодической ориентации
Authors: Мыльников В.Ю. , Аверкиев Н.С. , Соколовский Г.С.
Published: August 2020

We theoretically demonstrate cascaded fourth and second harmonic generation in a periodically-poled nonlinear crystal with a half-order of phase-matching period. We consider a cascaded process in which four photons of the fundamental harmonic firstly convert into an intermediate photon of the fourth harmonic, which parametrically decays into two photons of the second harmonic at the second stage. Phase-matching for this cascaded nonlinear conversion is provided by using an asymmetric periodical poling. We use the quantum spatial Heisenberg equations to describe light propagation and conversion inside the nonlinear crystal. With this approach, we calculate second and fourth harmonic average number of photons as a function of the nonlinear crystal length.
Фотодеструкция поливинилпирролидона в водных растворах нитратов металлов
Authors: Евстропьев С.К. , Никоноров Н.В. , Саратовский А.С.
Published: August 2020

Представлены результаты исследования фоторазложения поливинилпирролидона в растворах нитратов металлов. Этот полимер окисляется в нитратных растворах под действием УФ излучения, реагируя с активными формами кислорода и замедляя фоторазложение других органических веществ. УФ облучение наночастиц ZnO, стабилизированных поливинилпирролидоном, приводит к его удалению и росту наночастиц. Ключевые слова: фотоокисление, нитрат, полимер, наночастица, спектр поглощения, раствор.
Оптические свойства легированных нанопроволок во внешних электрическом и магнитном поляx
Authors: Синявский Э.П. , Соковнич С.М.
Published: August 2020

The impurity absorption of light in quantum wires in the presence of external electric and magnetic fields directed parallel to each other and perpendicular to the axis of the nanowire is studied theoretically. Impurities doped in a quantum wire are modeled by a zero-range potential. Expressions are obtained for the light absorption coefficient and the features of impurity absorption of light are studied for all possible directions of polarization of the light wave. In particular, in the presence of external fields, some optical transitions, which are forbidden in the absence of fields, become allowed. The frequency dependences of the light absorption coefficient and the influence of electric and magnetic fields on the value of the impurity light absorption coefficient are investigated. The possibility of controlling the optical characteristics of nanowires using an electric field is shown.
Continuous Manufacturing of Piezoceramic Hybrid Laminates for Functionalised Formed Structural Components
Authors: Ullmann Frank , Decker Ricardo , Graf Alexander , Kräusel Verena , Heinrich Michael , Hardt Wolfram , Kroll Lothar , Landgrebe Dirk
Published: August 2020

While in general manufacturing and functional integration are separated steps, in this article a continuous mass-production enabled procedure is discussed. The essential component of the manufactured laminate is a functionalised thermoplastic film that is combined with piezoceramic powder (lead zirconate titanate - PZT) and carbon nanotubes (CNT). The challenge is to achieve optimal electrical and electromechanical properties and a good processability while simultaneously preserving the high toughness of the composite and the required adhesive strength with the joined metal sheet. Determining the optimal joining and surface treatment parameters by identifying the interlaminar shear strength between the metal and plastic components allows for a continuous rolling production process with a subsequent roll forming process. Further investigations on the forming properties are concerned with the optimal placement of the sensors as well as the arrangement and shape of the electrodes. A neural network approach is evaluated to facilitate detection and localisation of external forces in order to use such functional hybrid laminates for new operating concepts in the interior of motor vehicles or for structural health monitoring.
Cold surface treatments on fiber-reinforced plastics by pulsed laser
Authors: Gebauer Jana , Paczkowski Gerd , Weixler Jodok , Klotzbach Udo
Published: August 2020

When producing fiber-reinforced plastic (FRP) suitable for mass production, new technologies have to be developed to overcome existing challenges such as increased efficiency in resource consumption or higher process flexibility. In the past, laser processing has been shown to yield important advantages such as non-contact processing, no tool wear and high design flexibility.Pulsed laser ablation of FRP offers a promising alternative to state of the art mechanical blasting. The selective matrix removal enables a high potential to improve adhesive bonding, molding processes and coating deposition of lightweight materials, especially FRP-metal or FRP-ceramic hybrids. The resulting increase in surface area exhibits forms lock characteristics and simultaneously provides an expanded interface area. As a result, 40 % higher tensile strength can be reached in pull-off tests compared to a mechanically blasted organic sheet surface, joined by thermal spraying of aluminum on carbon fiber-reinforced epoxy (CFRP).
Material-integrated composite humidity sensors for condition monitoring of fiber-reinforced plastics
Authors: Martin Jörg , Shetty Kuldeep , Reimann Nadine , Neukirchner Stephan , Fügmann Uta , Illing-Günther Heike , Nestler Daisy , Hübler Arved C. , Nendel Klaus , Kroll Lothar , Otto Thomas
Published: August 2020

Penetrating water in fiber-reinforced plastics can alter the mechanical properties considerably. To avoid potential resulting failure of the component, we propose continuous monitoring of the humidity inside the material by highly-sensitive humidity sensors based on nano- or microcomposites. Here we report on the inline-capable fabrication and integration of humidity sensors in glass fiber-reinforced polyamide (GF-PA6). Mean water concentrations of less than 0.5 wt. % have been clearly determined inside the laminate.
Tailored Fiber Placement in Thermoplastic Composites
Authors: Spickenheuer Axel , Scheffler Christina , Bittrich Lars , Haase Rico , Weise Dieter , Garray Didier , Heinrich Gert
Published: August 2020

Fiber path optimization methods combined with the Tailor Fiber Placement (TFP) technology provide the optimum correlation between load case and fiber orientation and therefore lead to unmatched component performance with endless fiber composite materials. The aim of this work is the development of an innovative manufacturing technology for thermoplastic composites (TPC) including sizing-adapted commingled glass fiber (GF) / thermoplastic yarns (SpinCom yarns) to be processed by TFP to textile preforms with a variable-axial, load adapted fiber design. Furthermore, these preforms will be consolidated in a low energy and resource consuming process using novel light and low cost forming tools produced by incremental sheet metal forming technology. Finally, a low cost solution for thermal processing even for complex shaped TPC parts will be presented. Heading towards optimized resource and cost efficiency of the whole process chain, first results of SpinCom yarns, fiber path optimization, tool manufacturing and forming procedure are presented and demonstrated using GF/PBT (polybutylene therephthalate) SpinCom yarns and the geometry of a bicycle saddle.
Influence of the edge quality to the water sorption of remote laser and mechanically cut carbon fibre reinforced polymer
Authors: Rose Michael , Mickan Alexander , Hauptmann Jan , Wetzig Andreas , Zimmermann Martina
Published: August 2020

The processing of carbon fibre reinforced polymers (CFRP) is complex due to the heterogeneous material structure and the hard and brittle fibres. For the creation of the final contour during component manufacture, the trimming of semi-finished products is necessary. For these processing steps, multiple cutting processes are available. Depending on the chosen process, the structure of the edges can show considerable differences [1]. Reference [2] proves that the surface condition of CFRP influences the diffusivity, maximum moisture content and concentration. The cutting edge forms part of the component surface.The aim of the present study is an evaluation of the influence of the cutting edge condition on the moisture uptake of CFRP. A systematic analysis of the water sorption behaviour of CFRP with edges generated with thermal remote laser and mechanical processing technologies was performed. Also, the effect of edge sealing was considered. Depending on the applied process, differences in the moisture uptake of CFRP could be shown. Several remote laser cut samples with a distinct heat-affected zone (HAZ) absorbed water rapidly. Thermally exposed fibre ends may form capillaries. By choosing suitable laser processing parameters or edge sealing, this effect could be avoided, resulting in inconspicuous water sorption behaviour.
Augmented Reality System for Digital Rectal Examination Training and Assessment: System Validation
Authors: Muangpoon Theerapat , Haghighi Osgouei Reza , Escobar-Castillejos David , Kontovounisios Christos , Bello Fernando
Published: August 2020

Background

Digital rectal examination is a difficult examination to learn and teach because of limited opportunities for practice; however, the main challenge is that students and tutors cannot see the finger when it is palpating the anal canal and prostate gland inside the patients.

Objective

This paper presents an augmented reality system to be used with benchtop models commonly available in medical schools with the aim of addressing the problem of lack of visualization. The system enables visualization of the examining finger, as well as of the internal organs when performing digital rectal examinations. Magnetic tracking sensors are used to track the movement of the finger, and a pressure sensor is used to monitor the applied pressure. By overlaying a virtual finger on the real finger and a virtual model on the benchtop model, students can see through the examination and finger maneuvers.

Methods

The system was implemented in the Unity game engine (Unity Technologies) and uses a first-generation HoloLens (Microsoft Inc) as an augmented reality device. To evaluate the system, 19 participants (9 clinicians who routinely performed digital rectal examinations and 10 medical students) were asked to use the system and answer 12 questions regarding the usefulness of the system.

Results

The system showed the movement of an examining finger in real time with a frame rate of 60 fps on the HoloLens and accurately aligned the virtual and real models with a mean error of 3.9 mm. Users found the movement of the finger was realistic (mean 3.9, SD 1.2); moreover, they found the visualization of the finger and internal organs were useful for teaching, learning, and assessment of digital rectal examinations (finger: mean 4.1, SD 1.1; organs: mean 4.6, SD 0.8), mainly targeting a novice group.

Conclusions

The proposed augmented reality system was designed to improve teaching and learning of digital rectal examination skills by providing visualization of the finger and internal organs. The initial user study proved its applicability and usefulness.
Digital Health Needs of Women With Postpartum Depression: Focus Group Study
Authors: Lackie Madison E , Parrilla Julia S , Lavery Brynn M , Kennedy Andrea L , Ryan Deirdre , Shulman Barbara , Brotto Lori A
Published: August 2020

Background

Although approximately 10% of new mothers in Canada develop postpartum depression (PPD), they face many barriers when accessing care. eHealth offers a unique opportunity to provide psychosocial skills and support to new mothers; however, patient populations are not consistently engaged in eHealth development processes. Thus, the diversity of women’s backgrounds and needs are often not reflected in existing tools.

Objective

This study aims to engage women from a variety of backgrounds and locations around British Columbia (BC) who have previously experienced PPD to determine the unmet psychoeducational needs of women with PPD and how a web-enabled platform used to deliver psychosocial skills and education to assist in the management of PPD could fulfill those needs.

Methods

Focus groups were conducted in 7 cities across BC with a total of 31 women (mean age 34.5 years, SD 4.9), with each group ranging from 2-7 participants. Focus groups were cofacilitated by the study coordinator and a local service provider in each community using a semistructured guide to discuss participants’ needs, ideas, and opinions as they relate to the use of technology in PPD management. Transcripts were approached inductively using thematic analysis to identify themes and qualitative description to frame what was observed in the data.

Results

A total of 5 themes were identified: bridging gaps to meet needs; providing validation to combat stigma; nurturing capacity to cope, manage, and/or reach wellness; empowering people to take ownership over their mental health; and offering customization to ensure relevance. Each theme identified a need (eg, combatting stigma) and a way to address that need using a web-enabled intervention (eg, providing validation). At the intersection of these themes was the overarching value of promoting agency for women experiencing PPD.

Conclusions

Ultimately, new mothers require accessible mental health care that promotes their agency in mental health care decision making. Our participants believed that a web-enabled intervention could help meet this need. These data will be used to guide the design of such an intervention, with the eventual implementation of this resource as a first-line management option for PPD.
Impact of Wearing Masks, Hand Hygiene, and Social Distancing on Influenza, Enterovirus, and All-Cause Pneumonia During the Coronavirus Pandemic: Retrospective National Epidemiological Surveillance Study (Preprint)
Authors: Chiu Nan-Chang , Chi Hsin , Tai Yu-Lin , Peng Chun-Chih , Tseng Cheng-Yin , Chen Chung-Chu , Tan Boon Fatt , Lin Chien-Yu
Published: August 2020

BACKGROUND

The coronavirus disease (COVID-19) pandemic is an important health crisis worldwide. Several strategies were implemented to combat COVID-19, including wearing masks, hand hygiene, and social distancing. The impact of these strategies on COVID-19 and other viral infections remains largely unclear.

OBJECTIVE

We aim to investigate the impact of implemented infectious control strategies on the incidences of influenza, enterovirus infection, and all-cause pneumonia during the COVID-19 pandemic.

METHODS

We utilized the electronic database of the Taiwan National Infectious Disease Statistics System and extracted incidences of COVID-19, influenza virus, enterovirus, and all-cause pneumonia. We compared the incidences of these diseases from week 45 of 2016 to week 21 of 2020 and performed linear regression analyses.

RESULTS

The first case of COVID-19 in Taiwan was reported in late January 2020 (week 4). Infectious control strategies have been promoted since late January. The influenza virus usually peaks in winter and decreases around week 14. However, a significant decrease in influenza was observed after week 6 of 2020. Regression analyses produced the following results: 2017, R2=0.037; 2018, R2=0.021; 2019, R2=0.046; and 2020, R2=0.599. A dramatic decrease in all-cause pneumonia was also reported (R2 values for 2017-2020 were 0.435, 0.098, 0.352, and 0.82, respectively). Enterovirus had increased by week 18 in 2017-2019, but this was not observed in 2020.

CONCLUSIONS

Using this national epidemiological database, we found a significant decrease in cases of influenza, enterovirus, and all-cause pneumonia during the COVID-19 pandemic. Wearing masks, hand hygiene, and social distancing may contribute not only to the prevention of COVID-19 but also to the decline of other respiratory infectious diseases. Further studies are warranted to elucidate the causal relationship.
Text Document Retrieval In English Using Keywords of Indonesian Dictionary Based
Authors: Wibowo Jati Sasongko , Hartati Sri
Published: August 2020

Abstract— Cross language information regtrieval at the present moment is crucial to the amount of available information use the language variety. Mean while the user who have mastering another language is very less. So with the appointment system of cross language information retrieval is expected.Information retrieval applications on this system to search for text documents in English using keyword of Indonesian dictionary-based. This system was built by several stages starting from collection of documents data by using crawler, entering documents data into a corpus table, punctuation removal, tokenization of documents, stopword removal and term weighting.The ability of this system can add documents data, dictionaries data and stopword data. It is enable to retrieval text documents in English that contains keyword of Indonesian with dictionary-based. Results of documents retrieval was ranked based on the calculation of term weights. Able to see the contents of the document and open the original document. The development of this system can be used as a cross language information retrieval system on dictionary based.Keywords— retrieval information, dictionary based, cross language.
Aplikasi Sistem Pendukung Keputusan Distribusi Air Bersih dengan Fuzzy Integer Transportation
Authors: Arifin Aridhanyati , Hartati Sri
Published: August 2020

Abstrak— Kebutuhan air bersih di kota-kota berkategori urban semakin lama semakin meningkat, sementara produktivitas air menurun disebabkan oleh berbagai alasan. Persoalan yang harus dipecahkan adalah bagaimana agar distribusi air ke tujuan berjalan secara simultan, yakni antara supply air dengan demand pelanggan ditengah minimnya anggaran biaya. Perlu dicari keputusan bagi perencanaan distribusi yang baik untuk mengalokasikan air, dari sejumlah sumber air  menuju sejumlah tujuan (kota). Oleh karena itu, diperlukan sistem terkomputerisasi yang memiliki kemampuan dalam memberikan dukungan untuk pengambilan keputusan, maka perlu dirancang suatu sistem pendukung keputusan (SPK) yang dapat membantu manajemen distribusi air bersih. SPK ini mengimplementasikan Fuzzy Integer Transportation  dengan nilai fuzzy supply, fuzzy demand dan fuzzy goal yang diekspresikan melalui bilangan fuzzy. Tabel transportasi dipakai untuk mempermudah pemodelan nilai supply dan demand yang ber-interval. Sebuah algoritma khusus digunakan agar dapat menghasilkan solusi integer yang optimal sehingga dapat meningkatkan efisiensi pencarian. Selain itu pemecahan masalah distribusi ini memakai pendekatan Vogel’s Approximation Method (VAM), memberikan solusi yang feasible bagi total biaya distribusi. Output sistem adalah total biaya distribusi dan jumlah air yang didistribusikan ke masing-masing tujuan.  Kata Kunci—       Sistem Pendukung Keputusan, Fuzzy Integer Transportation, VAM
Implementasi Metode Fuzzy TOPSIS untuk Seleksi Penerimaan Karyawan
Authors: Lestari Sri , Priyodiprodjo Widodo
Published: August 2020

Abstract —An emerging institution would continue to need qualified workers to produce good performances.  Seeing the importance of high quality employees, the candidate selection process became an important part and should be performed promptly.  It is also important to have candidates with desirable criteria fit to the institution. Many proposed methods can be adapted to help employee selection process based on criteria.  This research propose an employee selection system based on Fuzzy Technique for Order Preference by Similarity to Ideal Solution (TOPSIS) method, because the proposed method capable to deal with multi dimensional problems in employees selection.  The system will produce ranks that can be used to help the hiring decision. This research also compares the results from TOPSIS method and WPM method.  The comparison result shows that both methods produce the same ranks for the chosen candidates.Keywords—  Fuzzy TOPSIS, WPM, Employee Selection.
Sistem Pendukung Keputusan Model Fuzzy AHP Dalam Pemilihan Kualitas Perdagangan Batu Mulia
Authors: Wahyuni Sri , Hartati Sri
Published: August 2020

AbstrakPemilihan kualitas batu mulia membutuhkan kemampuan khusus untuk memilih dan menilai kualitas batu mulia yang akan diperdagangkan. Keberagaman jenis batu mulia dan konsumen menjadi kendala tersendiri ketika pengetahuan dan kemampuan individu dalam menganalisis kualitas batu mulia sangatlah minim.Penelitian ini menggunakan metode kuantitatif dengan menggunakan model Fuzzy AHP. Pengumpulan data dilakukan dengan cara konsultasi dengan Direktur Kantor Pusat Promosi Batu Mulia Indonesia GEM-AFIA GROUP  di Bandung sehingga dihasilkan kriteria-kriteria terbaik dalam pemilihan kualitas perdagangan batu mulia. Kriteria-kriteria tersebut kemudian disusun berdasarkan literatur, observasi dan wawancara, selanjutnya diberi penilaian perbandingan berpasangan dengan AHP untuk mencari bobot informasional dan menggunakan TFN untuk mencari upper excepted value.Hasil yang didapat dengan menggunaan model Fuzzy AHP dalam pemilihan kualitas perdagangan batu mulia menunjukkan bahwa kriteria berat jenis, warna, kekerasan, pemotongan, dan kejernihan merupakan kriteria utama dalam pemilihan kualitas perdagangan batu mulia. Fuzzy AHP dalam penilaian tingkat kosistensi dilakukan pada level struktur hierarki dan mampu mengakomodir ketidak konsistenan dalam penilaian. Kata kunci—AHP (Analysis Hierarchy Process), Fuzzy AHP, TFN (Triangular Fuzzy Number), upper eecepted upper. AbstractThe selection process of Precious stone quality requires particular ability in selecting and assessing the quality of traded Precious stones . The diversity types of Precious stoneand consumers in choosing it become an obstacle since the limited knowledge and ability to analyze needs of individuals.This research applied quantitative method by employing Fuzzi AHP model. The data was collected by consulting the director of  Kantor Promosi Batu Mulia Indonesia GEMAFIA GROUP located in Bandung that gives some criteria in the selection of Precious stonetrade quality. Further, these criteria are formulated based on AHP pair comparison to find out the informational quality and upper expected values using TFT (triangular Fuzzy Number).The result that is based on Fuzzy AHP method show that density, color, hardness, cutting and clarity criteria are the criteria in selecting Precious stonetrade quality.  This method in the assessment of consistency level is done in the hierarchy structure level and is able to accommodate the assessment inconsistency. Keywords—AHP (Analysis Hierarchy Process), Fuzzy AHP, TFN (Triangular Fuzzy Number),  upper eecepted upper.
GDSS Penentuan Lokasi Shelter Baru Transjogja Menggunakan Metode Brown-Gibson dan Borda
Authors: Susilo Bhakti , SN Azhari
Published: August 2020

AbstrakTujuan didirikannya armada bus Transjogja adalah untuk mengurai permasalahan kemacetan, polusi dan transportasi umum yang memadai. Untuk memberikan layanan yang terbaik, salah satu hal yang diusahakan adalah menempatkan shelter pada posisi yang tepat. Dinas perhubungan bekerja sama dengan instansi lain dalam pengumpulan aspirasi eksekutif untuk penentuan lokasi shelter baru.Kombinasi Metode Brown-Gibson dan Borda memungkinkan digunakan untuk pemilihan lokasi secara kelompok. Metode ini digunakan untuk memilih alternatif  lokasi berdasarkan ukuran preferensi tertentu (preference measurement) dengan mempertimbangkan faktor obyektif dan faktor subyektifnya. Faktor obyektif  berupa efektifitas biaya yaitu jumlah total biaya yang dikeluarkan untuk satu alternatif lokasi. Faktor subyektif berupa pembobotan para pengambil keputusan terhadap kriteria-kriteria yang disyaratkan dalam penentuan lokasi shelter baru. Kriteria tersebut antara lain lahan, posisi, akses ruang, persaingan, transportasi dan keamanan. Dalam penilaian faktor subyektif menggunakan model AHP.Hasil dari penelitian ini adalah GDSS dengan menggunakan metode Brown-Gibson dan borda terbukti dapat mengakomodasi preferensi dari banyak pembuat keputusan. Dengan keluaran berupa nilai preferensi lokasi dan rangking memudahkan DM menentukan pemilihan lokasi. Lokasi yang paling banyak memiliki rangking tertinggi lebih berpotensi sebagai lokasi shelter baru.Kata kunci— Lokasi, Brown-Gibson, Borda AbstractThe purpose of establishment of the Transjogja bus fleet is to solve the problems of congestion, pollution and adequate public transport. To provide the best service, one thing is to place the shelter afforded in the right position. Department of Communication, cooperate with other agencies in the collection of executive aspirations, for the determination of the location of the new shelter.The combinations of  Brown-Gibson and Borda methods, possible used for site selection as a group. This method is used to select an alternative location based on the size of a particular preference (preference measurement) taking into account the objective factors and subjective factors. Objective factor in the form of cost effectiveness is the total amount of expenses incurred for an alternative location. Subjective weighting factor of the decision makers of the criteria required in determining the location of the new shelter. These criteria include land, position, and access to space, competition, transportation and security. In the assessment of subjective factors is using the AHP model.The result of this study is to GDSS using the Brown-Gibson method and Borda shown to accommodate the preferences of many decision makers. With the output of the value location preference and rankings, it facilitated DM to determine new location. Location that has the highest ranking is more potent as a location for a new shelter.Keywords— Location, Brown-Gibson, Borda
An Application of Expert System to Identify Trees Utilizing Leaf Images
Authors: Sarita Muhammad Lhsan , Hartati Sri
Published: August 2020

AbstractTree identification is a very important to support almost all activities in the forest sector. Unfortunately, the inavailability of data and computer programs that is user friendly have caused ineficiency in tree identification. This research tries to make an expert system to identify trees by using the leaf images. To store the data in the knowledge base one must choose one of the some leaf images that are in the data base available in the program according the characteristic of the leaf. Each leaf image has a code and the accumulation of all codes build a tree code then this code is saved in the knowledge base. The tree code is used to identify a tree by making the comparison between input chosen by user and the tree code in the knowledge base using forward chaining. User who has information about a tree can add to the knowledge base but this information must be validated by an expert before it is used in the system. Another task of an expert is to give a CF (certainty factor) for each tree.The result of this research shows that no more errors are found due to input mistakes and the program is more user friendly. Another advantage is that the knowledge base is more flexible, dynamic and well organized Validation of knowledge base by experts can increase the quality and accuracy of using the knowledge base system.Keywords : expert system, leaf image, knowledge base, forward chaining, CF
Artificial Intelligence on Computer Based Chess Game: An Implementation of Alpha-Beta-Cutoff Search Method
Authors: Sano Albert Dian , Wardoyo Retantyo
Published: August 2020

AbstractA chess program usually consists of three main parts, that is, a move generator to generate all legal moves, an evaluation function to evaluate each move, and a search function to select the best move. The search function is the core of thinking process. The goal of this research is to implement the alpha beta cutoff as a search method. This method is derived from minimax search method and is more optimal than the minimax search method.In minimax, all nodes is searched and compared one by one to get the best value. On the other hand, the alpha beta cut of methd only searches nodes which make contribution to the previous value and cuts off nodes which are not useful. It means that the alpha beta method will not search and compare all nodes. The new node will be better than the previous one and replace the old value with the new one. This will make the alpha beta method requires smaller search time.The proposed method is tested by doing a series of matches between humans and a computer. The results show that the computer has ability to think well and performs a good artcial intelligence though it is very open to be modified and more optimized.Keywords: move generator function, evaluation function, search function, minimax, alpha beta cutoff
Sistem Evaluasi Kelayakan Mahasiswa MagangMenggunakan Elman Recurrent Neural Network
Authors: Jiwa Permana Agus Aan , Prijodiprodjo Widodo
Published: August 2020

AbstrakJaringan Syaraf Tiruan (JST) dapat digunakan untuk memecahkan permasalahan tertentu seperti prediksi, klasifikasi, pengolahan data, dan robotik.Berdasarkan paparan tersebut, sehingga dalam penelitian ini mencoba menerapkan JST untuk menangani permasalahan dalam program magang yang sedang dihadapi dalam upaya untuk meningkatkan kompetensi, pengalaman, serta melatih softskill mahasiswa.Sistem yang dikembangkan dapat digunakan untuk mengevaluasi kelayakan mahasiswa dalam program magang ke luar daerah dengan menerapkan Elman Recurrent Neural Network (ERNN), sehingga dapat memberikan informasi yang akurat kepada pihak jurusan untuk menentukan keputusan yang tepat.Struktur Elman dipilih karena dapat membuat iterasi jauh lebih cepat sehingga memudahkan proses konvergensi. Adapun metode pembelajaran yang digunakan adalah Backpropagation ThroughTime dengan model epochwise training mode. Sistem diimplementasikan dengan menggunakan bahasa pemrograman C# dengan basis data MySQL. Vektor input yang digunakan terdiri dari 11 variabel. Hasil penelitian menunjukkan bahwa sistem yang dikembangkan akan cepat mengalami konvergen dan mampu mencapai nilai error paling optimal (minimum error) apabila menggunakan 1 hidden layer dengan jumlah neuron 20 unit. Akurasi terbaik dapat diperoleh dengan menggunakan LR sebesar 0.01 dan momentum 0.85 dimana akurasi rata-rata dalam pengujian mencapai 87.50%. Kata kunci—Evaluasi, Kelayakan, Jaringan Syaraf Tiruan (JST), Elman Recurrent Neural Network, Magang Abstract Artificial Neural Network (ANN) can be used to solve specific problems such as prediction, classification, data processing, and robotics. Based on the exposure, so in this study tried to apply neural networks to handle problems in apprentice program facing in an effort to increase the competence, experience and soft skills training students. The system developed can be used to evaluate the students in the apprentice program to other regions by applying the Elman Recurrent Neural Network (ERNN), so it can provide accurate information to the department to determine appropriate decisions. Elman structure was chosen because it can be create much more rapidly iterations so as to facilitate the convergence process. The learning method used is Backpropagation Through Time with model epochwise training mode. The system is implemented using the C # programming language with a MySQL database. Input vector used consists of 11 variables. The results showed that the developed system will rapidly converge and can reach optimal error value (minimum error) when using one hidden layer with 20 units number of neurons. Best accuracy can be obtained using the LR of 0.01 and momentum 0.85 which average accuracy reaches 87.50% in testing. Keywords—Evaluation, Feasibility, Artificial Neural Network (ANN), Elman Recurrent Neural Network, Apprenticeship
Klasifikasi Varietas Tanaman Kelengkeng Berdasarkan Morfologi Daun Menggunakan Backpropagation Neural Network dan Probabilistic Neural Network
Authors: Syahputra Hermawan , Harjoko Agus
Published: August 2020

Pengenalan daun memainkan peran penting dalam klasifikasi tanaman dan isu utamanya terletak pada apakah fitur yang dipilih stabil dan memiliki kemampuan yang baik untuk membedakan berbagai jenis daun. Pengenalan tanaman berbantuan komputer merupakan tugas yang masih sangat menantang dalam visi komputer karena kurangnya model atau skema representasi yang tepat. Fokus komputerisasi pengenalan tanaman hidup adalah untuk mengukur bentuk geometris berbasis morfologi daun. Informasi ini memainkan peran penting dalam mengidentifikasi berbagai kelas tanaman. Pada penelitian ini dilakukan pengenalan jenis tanaman berdasarkan fitur yang menonjol dari daun seperti fisiologis panjang (physiological length), lebar (physiological width), diameter,  keliling (leaf perimeter), luas (leaf area), faktor mulus (narrow factor), rasio aspek (aspect ratio), factor bentuk (form factor), rectangularity, rasio perimeter terhadap diameter, rasio perimeter panjang fisiologi dan lebar fisiologi yang dapat digunakan untuk membedakan satu sama lain. Berdasarkan hasil pengujian, ditunjukkan bahwa hasil pencocokkan daun kelengkeng dengan menggunakan neural network lebih baik dibandingkan dengan hasil pencocokkan daun kelengkeng dengan menggunakan probabilistic neural network. Akan tetapi ekstraksi fitur dengan menggunakan morfologi belum dapat memberikan informasi pembeda yang signifikan bagi pengenalan tanaman varitas kelengkeng berdasarkan daunnya.Keywords— klasifikasi, morfologi daun, neural network, probabilistic neural network