bluuebunny/crossref_metadata_2025 huggingface dataset:
The Development of Interactive Media Based Wirdah Learning Model
Authors: Yanti Nasution Wirdah , Napitupulu Efendi , . Baharuddin , Simarmata Janner
Published: April 2019

This study aimed to find out the feasibility of interactive media-based learning model and the effectiveness of interactive media-based learning model in m Enhancing student learning outcomes. This learning product development model was a model structured in a programmed and systematic sequence and fulfilled the characteristics of students in learning. The results showed (1) test of Civics subject matter experts were at very good qualifications of 96.1%, (2) test of design experts with excellent qualifications of 97.27%, (3) test of software experts at very good qualifications 96 , 1%, (4) individual trials were in excellent qualifications of 92.3%, (5) small group trials were in very good qualifications of 93.9%, (6) field trials were in very good qualifications of 97, 61%. The results of testing the hypothesis proof that there were significant differences between student learning outcomes in the control class and the experimental class. This was indicated by the results of data processing tobserved = 1.97 , at the significance level α = 0.05 ttable = 1.69. It was concluded that interactive media-based learning models that were developed were feasible and effective to improve Civics learning outcomes.
PELIMPAHAN KEWENANGAN BPK KEPADA PERWAKILAN BPK DALAM PEMERIKSAAN DI DAERAH
Authors: Astuti Dessy Dwi , Sa’adah Nabitatus
Published: April 2019

Jurnal ilmiah ini mengenai Pelimpahan Kewenangan Badan Pemeriksa Keuangan (BPK) kepada Pelaksana di Perwakilan BPK dalam kerangka Pemeriksaan pada Pemerintah Daerah, dengan berdasar pada gugatan terhadap LHP BPK Perwakilan Provinsi Jambi atas Laporan Keuangan Pemerintah Daerah Kota Jambi Nomor 20.C/LHP/XVIII.JMB/5/2016. Indikasi permasalahan yaitu bagaimana bentuk pelimpahan kewenangan BPK kepada Pelaksana BPK dalam rangka pelaksanaan tugas pemeriksaan pengelolaan dan tanggungjawab keuangan negara pada Pemerintah Daerah, hingga terbitnya Laporan Hasil Pemeriksaan (LHP) BPK, ditinjau dari sumber kewenangannya. Kewenangan yang dimiliki oleh BPK merupakan kewenangan atribusi dari UUD 1945. Mengacu pada pelaksanaan tugas dan kewenangan BPK tersebut, di lingkungan BPK terdapat pelimpahan kewenangan yang bersifat delegasi dan mandat kepada Pelaksana BPK. BPK sebagai lembaga negara dalam melaksanakan tugas dan kewenangannya, tidak terlepas dari Asas-Asas Umum Pemerintahan yang Baik sebagaimana diatur dalam Undang-Undang Nomor 30 Tahun 2014 tentang Administrasi Pemerintahan, namun demikian perlu diketahui batasan pelimpahan wewenang secara delegasi dan mandat yang berlaku di lingkungan BPK. Kesimpulan yang dapat diambil bahwa dalam pelaksanaan pemeriksaan atas pengelolaan dan tanggung jawab keuangan negara oleh BPK Perwakilan kepada Pemerintah Daerah, hingga penandatanganan dan penerbitan Laporan Hasil Pemeriksaan (LHP) BPK Perwakilan, terjadi pelimpahan kewenangan yang bersifat delegasi dan mandat. Adapun pengaturan pelimpahan kewenangan tersebut perlu diselaraskan dengan Undang-undang Nomor 30 Tahun 2014 guna mengantisipasi permasalahan hukum yang akan timbul.Kata Kunci: Pelimpahan Kewenangan BPK; LHP BPK
Effective bounds for the Andrews spt-function
Authors: Locus Dawsey Madeline , Masri Riad
Published: April 2019

In this paper, we establish an asymptotic formula with an effective bound on the error term for
the Andrews smallest parts function

spt
⁢

(
n
)

{{\mathrm{spt}}(n)}

. We use this formula to prove recent conjectures
of Chen concerning inequalities which involve the partition function

p
⁢

(
n
)

{p(n)}

and

spt
⁢

(
n
)

{{\mathrm{spt}}(n)}

.
Further, we strengthen one of the conjectures, and prove that for every

ϵ
>
0

{\epsilon>0}

there is an effectively computable constant

N
⁢

(
ϵ
)

>
0

{N(\epsilon)>0}

such that for all

n
≥

N
⁢

(
ϵ
)

{n\geq N(\epsilon)}

, we have

6

π

⁢

n

⁢
p
⁢

(
n
)

<

spt
⁢

(
n
)

<

(

6

π

+
ϵ

)

⁢

n

⁢
p
⁢

(
n
)

.

\frac{\sqrt{6}}{\pi}\sqrt{n}\,p(n)<{\mathrm{spt}}(n)<\bigg{(}\frac{\sqrt{6}}{%
\pi}+\epsilon\bigg{)}\sqrt{n}\,p(n).

Due to the conditional convergence of the Rademacher-type formula for

spt
⁢

(
n
)

{{\mathrm{spt}}(n)}

, we must employ methods which are completely
different from those used by Lehmer to give effective error bounds for

p
⁢

(
n
)

{p(n)}

. Instead, our approach relies on
the fact that

p
⁢

(
n
)

{p(n)}

and

spt
⁢

(
n
)

{{\mathrm{spt}}(n)}

can be expressed as traces of singular moduli.
Secure Fingerprint Authentication Using Deep Learning and Minutiae Verification
Authors: Praseetha V.M. , Bayezeed Saad , Vadivel S.
Published: April 2019

Nowadays, there has been an increase in security concerns regarding fingerprint biometrics. This problem arises due to technological advancements in bypassing and hacking methodologies. This has sparked the need for a more secure platform for identification. In this paper, we have used a deep Convolutional Neural Network as a pre-verification filter to filter out bad or malicious fingerprints. As deep learning allows the system to be more accurate at detecting and reducing false identification by training itself again and again with test samples, the proposed method improves the security and accuracy by multiple folds. The implementation of a novel secure fingerprint verification platform that takes the optical image of a fingerprint as input is explained in this paper. The given input is pre-verified using Google’s pre-trained inception model for deep learning applications, and then passed through a minutia-based algorithm for user authentication. Then, the results are compared with existing models.
Pola Distribusi Aboveground Biomass Kawasan Hutan Mangrove Peniti Kalimantan Barat
Authors: Rafdinal Rafdinal , Rizalinda Rizalinda , Minsas Sukal
Published: April 2019

This study aims to analyze the distribution pattern of aboveground biomass (AGB) in the mangrove ecosystem of West Kalimantan Safety. In addition, it also analyzes the differences in biomass and carbon stocks in the condition of mangrove forests. The study of the distribution pattern of AGB of mangrove forests was carried out between August and September 2018. Determination of the location of the study was based on a conceptual approach in the dimensions of spatial temporal that is using the Porposive Random Sampling method. Vegetation analysis was carried out by a single plot measuring 50 m x 50 m at each selected location. Based on vegetation analysis data it was found that the density of mangrove stands on the Peniti coast ranged from 38 to 185 ind /ha, with an average of 88.25 ± 66.15 ind./ Ha. The AGB of pinch mangrove forests ranged from 8.85 to 84.82 Mg / ha with the largest total AGB distributed in the stand diameter class of more than 80 cm.

 

Penelitian ini bertujuan untuk menganalisis pola distribusi aboveground biomass (AGB) pada ekosistem mangrove Peniti Kalimantan Barat. Selain itu juga untuk menganalisis perbedaan biomassa, dan cadangan karbon pada kondisi hutan mangrove. Kajian pola distribusi AGB hutan mangrove Peniti dilakukan antara bulan Agustus dan September 2018. Penentuan lokasi penelitian didasarkan pada pendekatan konseptual dalam dimensi spasio temporal yaitu menggunakan metode Porposive Random Sampling. Analisis vegetasi dilakukan dengan metode petak tunggal berukuran 50 m x 50 m pada setiap lokasi terpilih. Berdasarkan data analisis vegetasi didapatkan bahwa kerapatan tegakan mangrove di pesisir Peniti berkisar antara 38 sampai 185 ind/ha, dengan rata-rata 88,25±66,15 ind./ha. AGB tegakan hutan mangrove Peniti berkisar antara 8,85 sampai 84,82 Mg/ha dengan total AGB terbesar terdistribusi pada kelas diameter tegakan lebih dari 80 cm.
PENYUSUNAN DAN IMPLEMENTASI SISTEM PELAYANAN PUBLIK SURAT PENGANTAR RT/ RW ONLINE UNTUK MEWUJUDKAN SEMARANG “SMART CITY”
Authors: Khafid Muhammad , Wahyudin Agus
Published: April 2019

Every citizen expects that RT / RW cover letter service can be obtained quickly and accurately. However, the expectation of public services such as introducing RT / RW letters sometimes can not be realized. Often the handling of RT / RW cover letters takes days. The purpose of this community service activity is to improve the quality of public service in the form of introductory letter service of RT / RW for the people in need. Specific targets of community service are: (1) establishment of public service system of RT / RW introduction letter online, and (2) implementation of public service system of RT / RW introduction letter online. Based on the results of community service activities, it is concluded that the RT RW online introduction letter application system is one of the alternative solutions for effective citizen administration services, since this system can overcome the difficulties of citizens in obtaining administrative services indefinitely dimensional space and time. The residents welcomed the existence of this RT RW online introduction letter application system, especially for residents of immigrant residents (residents of residential complex). However, for the original villagers, the existence of this system has not been so needed. The majority of the original villagers will not use this online system. Based on feedback on the ease of use of the system and the attractive appearance of this system, it is realized that the system is still a lot of shortcomings, so that future improvements are still needed.
Genome-Wide Analyses Reveal Footprints of Divergent Selection and Drought Adaptive Traits in Synthetic-Derived Wheats
Authors: Afzal Fakiha , Li Huihui , Gul Alvina , Subhani Abid , Ali Ahmad , Mujeeb-Kazi Abdul , Ogbonnaya Francis , Trethowan Richard , Xia Xianchun , He Zhonghu , Rasheed Awais
Published: April 2019

Crop-wild introgressions have long been exploited without knowing the favorable recombination points. Synthetic hexaploid wheats are one of the most exploited genetic resources for bread wheat improvement. However, despite some QTL with major effects, much less is known about genome-wide patterns of introgressions and their effects on phenotypes. We used two genome-wide association approaches: SNP-GWAS and haplotype-GWAS to identify SNPs and haplotypes associated with productivity under water-limited conditions in a synthetic-derived wheat (SYN-DER) population. Haplotype-GWAS further enriched and identified 20 more genomic regions associated with drought adaptability that did not overlap with SNP-GWAS. Since GWAS is biased to the phenotypes in the study and may fail to detect important genetic diversity during breeding, we used five complementary analytical approaches (t-test, Tajima’s D, nucleotide diversity (π), Fst, and EigenGWAS) to identify divergent selections in SYN-DER compared to modern bread wheat. These approaches consistently pinpointed 89 ‘selective sweeps’, out of which 30 selection loci were identified on D-genome. These key selections co-localized with important functional genes of adaptive traits such as TaElf3-D1 (1D) for earliness per se (Eps), TaCKX-D1 (3D), TaGS1a (6D) and TaGS-D1 (7D) for grain size, weight and morphology, TaCwi-D1 (5D) influencing drought tolerance, and Vrn-D3 (7D) for vernalization. Furthermore, 55 SNPs and 23 haplotypes of agronomic and physiological importance such as grain yield, relative water content and thousand grain weight in SYN-DER, were among the top 5% of divergent selections contributed by synthetic hexaploid wheats. These divergent selections associated with improved agronomic performance carry new alleles that have been introduced to wheat. Our results demonstrated that GWAS and selection sweep analyses are powerful approaches for investigating favorable introgressions under strong selection pressure and the use of crop-wild hybridization to assist the improvement of wheat yield and productivity under moisture limiting environments.
Tocilizumab: Efficacy and Tolerance in Rheumatoid Arthritis in Current Practice
Authors: Akasbi Nessrine , Mounir Amina , Omboumahou Bakale Francina Eddie , El Fakir Samira , Harzy Taoufik
Published: April 2019

Introduction: The aim of this study was to evaluate in “real life” the efficacy and the tolerance of Tocilizumab (TCZ) in the treatment of rheumatoid arthritis (RA).Materials and methods: A cross-sectional study including patients with RA patients treated with TCZ at the commended dose of 8 mg/kg/ 4 weeks. The therapeutic response was evaluated by the EULAR DAS 28 ‐CRP/ VS at month 3 and month 6 of treatment.Results: RA was in most cases severe (76,5 %), seropositive (88,2 %) and erosive (81,3 %). TCZ was prescribed as an alternative to a previous biotherapy in 23 % of the patients and in monotherapy in 76, 5 % of the patients. After treatment follow-up at 3 and 6 months, the different parameters observed were significantly improved including: VAS (visual analogue scale) pain (p=0,000), CRP (mg/L) p=0,000), ESR (mmH1) (p=0,000), DAS 28 CRP (p=0,000), and DAS 28 ESR (p=0,000). Apart from a worsening of renal function in a patient contraindicated continuation of tocilizumab, no serious side effects were noted.Conclusion: Our study confirmed the efficacy and tolerance of TCZ therapy in Moroccan patients suffering from RA.Keywords: rheumatoid arthritis, tocilizumab, efficacy, tolerance
Rare earth elements, U and Th in tunnel dusts of São Paulo city, Brazil
Authors: Nory Renata Mendes , Figueiredo Ana Maria Graciano
Published: April 2019

São Paulo is one of the most populated cities in the world, with about 20 million inhabitants in its metropolitan area, more than 12 million motor vehicles and intense industrial activity. Given its importance as a major urban center in South America and the lack of information concerning urban dust composition, the present study aimed to determine rare earth elements (REEs), U and Th mass fractions in tunnel dust, collected in the Jânio Quadros Tunnel, and to assess their possible sources. The study of REEs distribution in urban environments has become of interest over the last decades, due to the increasing industrial use of these elements. The REEs, that are as common as the most familiar metals, are found in metallurgical additives, fluid cracking catalysts and automobile converter catalysts, among other applications. In this study, which employed Instrumental Neutron Activation Analysis (INAA) as analytical technique, the mass fractions of eight REEs were determined and normalized to the chondrite concentration values. The results showed that major concentrations were found for light REEs, following the sequence Ce > La > Nd > Sm > Yb > Eu > Tb > Lu. The pattern of the results pointed to a natural origin for these elements. Regarding U and Th concentrations, the results varied between 1.0 – 9.4 µg g-1 and 3.3 – 35.9 µg g-1, respectively. Since there is almost no information about the concentration of these elements in this kind of matrix in São Paulo city, these data are important to support further investigations.
Determination of uranium in tree bark samples by epithermal neutron activation analysis
Authors: Pereira de Lima Nicole , Saiki Mitiko
Published: April 2019

In this study uranium (U) concentrations were determined in certified reference materials (CRMs) and in tree bark samples collected in “Cidade Universitária Armando de Salles Oliveira” (CUASO) USP, São Paulo. The barks were collected from different species namely Poincianella pluviosa and Tipuana tipu. These bark samples were cleaned, dried, grated and milled for the analyses by epithermal neutron activation analysis method (ENAA). This method consists on irradiating samples and U standard in IEA-R1 nuclear reactor with thermal neutron flux of 1.9 x 1012 n cm-2 s-1 during 40 to 60 seconds depending on the samples’ matrices. The samples and standard were measured by gamma ray spectroscopy. U  was identified by the peak of  74.66 keV of 239U with half life of 23.47 minutes. Concentration of U was calculated by comparative method. For analytical quality control of U results, certified reference materials were analyzed. Results obtained for CRMs presented good precision and accuracy, with |Z score| ≤ 0.39. Uranium concentrations in tree barks varied from 83.1 to 627.6 ng g-1 and the relative standard deviations of these results ranged from 1.8 to 10 %.
Establishing adequate conditions for mercury determination in environmental samples by INAA
Authors: Perez Caroline , Dos Santos Eliane Conceição , Saiki Mitiko
Published: April 2019

Mercury (Hg) is a toxic element released into the environment mainly by anthropic activities. Consequently, the improvement for Hg determination in environmental samples is of great interest. Instrumental Neutron Activation Analysis (INAA) is considered an adequate method to determine several elements. However, Hg determination by INAA is often hampered by its volatility, which causes losses. The aim of this study was to establish adequate irradiation conditions for Hg determination in environmental samples by INAA. The following parameters were evaluated: irradiation time, container for irradiation and spectral gamma ray interferences. For the study, aliquots of certified reference materials (CRMs) and tree bark samples were irradiated together with Hg synthetic standard at the IEA-R1 nuclear research reactor. Gamma ray activities of 197Hg and 203Hg were measured in a spectrometer coupled to a HGe detector. Obtained results indicated that polyethylene capsules or envelopes can be used as container for sample irradiation and the Hg impurities in these containers were negligible. Irradiation time of one hour was adequate for Hg determination and in long irradiations of 8 h problems of spectral interference of 198Au and 75Se were observed. In addition, Hg loss during the irradiation of 1 h and after irradiation was not observed. Quality control of Hg results, obtained in the CRMs analyses using one hour of irradiation, indicated good precision and accuracy with HORRAT < 2 and |Z score| < 2. The experimental conditions established in this study were applied to tree bark samples. Detection limits in these analyses were between 0.14 and 1.9 µg g-1.
Feasibility studies of using thin entrance window photodiodes for clinical electron beam dosimetry
Authors: Nascimento Cristina R. , Asfora Viviane K. , Barros Vinicius R. M. , Gonçalves Josemary A. C. , Andrade Luiza F. R. , Khoury Helen J. , Bueno Carmen C.
Published: April 2019

The response of the commercial XRA-24 PIN photodiode (5.76 mm2 active area) for clinical electron beam dosimetry covering the range of 8-12 MeV was investigated. Within this energy range, the charge generated in the diode’s sensitive volume is linearly dependent on the absorbed dose up to 320 cGy.  However, charge sensitivity coefficients evidenced that the dose response of the diode is slightly dependent on the electron beam energy. Indeed, the diode’s energy dependence was within 8.5% for 8-12MeV electron beams. On the other hand, it was also observed an excellent repeatability of these results with a variation coefficient (VC) lower than 0.4%, which is within the 1% tolerance limit recommended by the AAPM TG-62. Furthermore, the agreement between the percentage depth dose profiles (PDD) gathered with the diode and the ionization chamber allowed achieving the electron beam quality within 1% of that obtained with the ionization chamber. Based on these results, the photodiode XRA-24 can be a reliable and inexpensive alternative for electron beams dosimetry.
Chemical characterization of urban park soils of the metropolitan region of São Paulo
Authors: Figueiredo Ana Maria Graciano
Published: April 2019

In the last years, urban soils have been increasingly subject of investigations concerning their description and composition. In several important cities all over the world, urban soils show a significant increase in metal levels, due to the rise of pollution originated from continuous urbanization and industrial development. This metal contamination can disturb the natural geochemical cycles and their depending ecosystems. The expected population growth during the next decades will concentrate in urban areas, which are already the predominant human habitat. Metal contamination is a key issue in São Paulo City, the biggest urban agglomeration in Latin America. There has been little research on metal levels in São Paulo urban soils and almost nothing related to the city’s parks. The present study presents the concentration of major and trace elements in soil samples of nine parks of the metropolitan region of São Paulo. Top soil samples (0-20 cm) were collected in lines across the parks in order to have representative samples of the entire park. Instrumental Neutron Activation Analysis (INAA) and X-ray Fluorescence (XRF) were used for whole elemental analysis. The outcome of this study showed that the soils of the public parks studied presented, in general, concentration levels higher than the reference values for soils in São Paulo State. For As, V and Ni, which showed significant enrichment factors in relation to reference values, there is an indication of anthropogenic source. Cluster analysis grouped the elements Zn, Sb, Pb and Cu, well known as traffic-related elements, which may indicate a vehicular source.
Radioactive Background of Granito Madeira, North Amazonas, Brazil
Authors: MOURA Vanderlei Vilaça , Santos Talita Oliveira , BEZERRA Claubia Pereira
Published: April 2019

Radionuclides of natural origin are present in rocks and soils but have no homogeneous distribution in the soil of the Earth. Volcanic rocks have a higher concentration of uranium and thorium. Thus, sites with this type of origin present as radiological abnormalities. An example is the Planalto de Poços de Caldas in Minas Gerais. Another example is the Granito Madeira - a rock formation located in the Amazonas State, 350 km north of Manaus. This work presents the results of the natural radiation monitoring of Granito Madeira. 30,000 dose rates were collected with a sodium iodide scintillator transported on tracks within the Floresta Amazônica. These data were treated and georeferenced. As a result, an annual dose relative to gamma radiation of 6.0 mSv.year-1 was obtained. This information was represented in a frequency histogram and in a map of Granito Madeira.
Evaluation of radionuclide contamination of soil, coal ash and zeolitic materials from Figueira Thermoelectric Power Plant
Authors: Fungaro Denise Alves , Fungaro Denise Alves , Silva Paulo Sergio , Campello Felipe , Miranda Caio Silva , Izidoro Juliana
Published: April 2019

Neutron activation analysis and gamma-ray spectrometry was used to determine 238U, 226Ra, 228Ra, 210Pb, 232Th and 40K contents in feed pulverized coal, bottom ash, fly ash from cyclone and baghouse filters, zeolites synthesized from the ashes and two different soil samples. All the samples used in the study was collected at Figueira thermoelectric power plant, located in the city of Figueira, Paraná State, which coal presents a significant amount of uranium concentration. The natural radionuclide concentrations in pulverized coal were 4216 Bq kg–1 for 238U, 180 Bq kg–1 for 226Ra, 27 Bq kg–1 for 228Ra, 28 Bq kg–1 for 232Th and 192 Bq kg–1 for 40K.The ashes fraction presented concentrations ranging from 683.5 to 1479 Bq kg–1 for 238U, from 484 to 1086 Bq kg–1 for 226Ra, from 291 to 1891 Bq kg–1 for 210Pb, from 67 to 111 Bq kg–1for 228Ra, from 80 to 87 Bq kg–1 for 232Th and from 489 to 718 Bq kg–1 for 40K. Similar ranges were observed for zeolites. The activity concentration of 238U was higher than worldwide average concentration for all samples. The concentration of the uranium series found in the ashes were lower than the values observed in similar studies carried out 10 years ago and under the limit adopted by the Brazilian guideline (CNEN-NN-4.01). Nevertheless, the concentrations of this specific area are higher than others coal mines and thermoelectric power plants in and out of Brazil, so it is advisable to evaluate the environmental impact of the installation.
Chemical characterization of ancient pottery from the south-west Amazonia using Instrumental Neutron Activation Analysis
Authors: Carvalho Patricia Ramos
Published: April 2019

The analyzes carried out in this work aims to contribute to the discussion about the ceramic objects founded in Monte Castelo’s sambaqui located at south-west Amazonia. The first study accomplished by Miller in 1980 suggests that this archaeological site is inserted in the oldest contexts of production of ceramics in the Amazon. Until today, there aren't any physical and chemical analysis studies in this ceramics and this kind of studies may help archaeological studies performed at the sambaqui. With this purpose, this work presents a preliminary study of chemical characterization of eighty-four ceramic samples using instrumental neutron activation analysis (INAA) by means of the determination of Na, K, La, Sm, Yb, Lu, U, Sc, Cr, Fe, Co, Zn, Rb, Cs, Ce, Eu, Hf and Th. With the purpose to study the similarity/dissimilarity between the samples, cluster and discriminant analysis were used. The results showed the existence of three different chemical groups whose dating ranging 3000 b.P. to 1500 b.P. that are in agreement with the archaeological studies made by Miller and suggest Bacabal’s phase as the oldest ceramist culture in the Southwest of the Amazon.
Development of a method for multielemental determination in water by EDXRF with radioisotopic source of 238Pu.
Authors: Serrano Camilo Fuentes , Alvares Juan Reinaldo Estevez , Alvarez Alfredo Montero , Gonzales Ivan Pupo , Fernandez Zahily Herrero , Bombuse Dennys Leyva , Van Espen Piet , Diaz Jossue Arteche , Rojas Lino Valcarcel , Dos Santos Júnior Jose Araujo
Published: April 2019

A method for determination of Cr, Fe, Co, Ni, Cu, Zn, Hg and Pb in waters by Energy Dispersive X Ray Fluorescence (EDXRF) was implemented, using a radioisotopic source of 238Pu. For previous concentration was employed a procedure including a coprecipitation step with ammonium pyrrolidinedithiocarbamate (APDC) as quelant agent, the separation of the phases by filtration, the measurement of filter by EDXRF and quantification by a thin layer absolute method. Sensitivity curves for K and L lines were obtained respectively. The sensitivity for most elements was greater by an order of magnitude in the case of measurement with a source of 238Pu instead of 109Cd, which means a considerable decrease in measurement times. The influence of the concentration in the precipitation efficiency was evaluated for each element. In all cases the recoveries are close to 100%, for this reason it can be affirmed that the method of determination of the studied elements is quantitative. Metrological parameters of the method such as trueness, precision, detection limit and uncertainty were calculated. A procedure to calculate the uncertainty of the method was elaborated; the most significant source of uncertainty for the thin layer EDXRF method is associated with the determination of instrumental sensitivities. The error associated with the determination, expressed as expanded uncertainty (in %), varied from 15.4% for low element concentrations (2.5-5 μg/L) to 5.4% for the higher concentration range (20-25 μg/L).
Ionizing radiation effects in Brazilian grape tree wine
Authors: Pires Juliana Angelo , Harder Marcia Nalesso Costa , Arthur Valter , Silva Lúcia Cristina Aparecida Santos
Published: April 2019

The aim of this work was to irradiate brazilian grape tree wines with gamma radiation (Co60) to investigate the effect of radiation on its components and to create a new product for the superior quality fermented beverages market. For this wine was produced in an artisan way, but with all the care of hygiene and sanitation. The brazilian grape tree was femented for five days and the wine was then filtered and stored in inert material containers then irradiated at 2.5 and 5 kGy doses. The samples were evaluated in relation to the radiation doses used. Physical and chemical analyzes of pH; total and volatile acidity; alcohol content; anthocyanins; tannins and colorimetry were performed. As a result, in most product analysis, had little effect on irradiation, except for anthocyanins and tannins. For this can be concluded that it is possible to develop a new fermented drink based on brazilian grape tree, according to the standards required by the legislation and that the irradiation at the dose of 5kGy was the sample that shown to have the most effect on the color because it was the one that degraded most molecules of anthocyanins and tannins.
SEMIQUANTITATIVE EVALUATION OF 99MTCTRODAT1 BINDING POTENTIAL BY TWO METHODS OF SPECT IMAGE RECONSTRUCTION.
Authors: Leite Melissa Furlaneto Lellis , Reis Marilia Alves dos , Oliveira Cássio Miri , Castiglioni Mario Luiz Vieira , Bressan Rodrigo Affonseca
Published: April 2019

TRODAT-1 is a radiopharmaceutical derived from tropane and linked to tecnecium-99m ([99mTc] TRODAT-1) has been used in studies of dopamine transporter (DAT) in central nervous system. Associated with the SPECT technique of acquisition, is able to detect changes in neurological disorders like Parkinson´s disease, evaluating the binding potential (BP) of DAT. The aim of this study was to evaluate the influence of the image reconstruction methods, Filtered Back Projection (FBP) and iterative reconstruction (OSEM), in BP values at the striatal region in 30 healthy volunteers. Images were analyzed by visual inspection and semi-quantitative analysis. Regions of interest (ROI) were made over striatal areas on both sides. Nonparametric Wilcoxon statistical analysis was performed between the BP values from the FBP and OSEM methods. Our results showed that the reconstruction methods have a statistical significant BP values difference in the total striatum (Z = -2,2787 p = 0.005), right striatum (Z = -2,602 p = 0.009) and left striatum (Z= 2,746 p = 0.006). The effect size was calculated to see if there influence in this test: the "large effect size" for all measurements was observed (total striatum r= -0.51; right striatum r= -0.48; left striatum r= -0.50). FBP is the usual method of reconstruction for brain SPECT images, and our results showed influence of the OSEM method in BP. It is concluded that the method of image reconstruction adopted should be standardized to avoid incorrect evaluations of BP values using [99mTc]TRODAT-1.
Proposed Parameters for a Circular Particle Accelerator for Proton Beam Therapy Obtained by Genetic Algorithm
Authors: Campos Gustavo Lobato , Campos Tarcísio P. R.
Published: April 2019

This paper brings to light optimized proposal for a circular particle accelerator for proton beam therapy purposes (named as ACPT). The methodology applied is based on computational metaheuristics based on genetic algorithms (GA) were used to obtain optimized parameters of the equipment. Some fundamental concepts in the metaheuristics developed in Matlab® software will be presented. Four parameters were considered for the proposed modeling for the equipment, being: potential difference, magnetic field, length and radius of the resonant cavity. As result, this article showed optimized parameters for two ACPT, one of them used for ocular radiation therapy, as well some parameters that will allow teletherapy, called in order ACPT – 65 and ACPT – 250, obtained through metaheuristics based in GA.
Natural and artificial nuclides in Salesópolis reservoir
Authors: Silva Paulo Sergio Cardoso , Semmler Renato , Zahn Guilherme Soares , Rocha Flávio Roberto , Damatto Sandra Rerina , Fávaro Déborah Inez Teixeira
Published: April 2019

Natural radioactivity is ubiquitous in the environment mainly due to the presence of the nuclides from the uranium and thorium series and 40K. Although in the South Hemisphere nuclear tests have been fewer in number than that in the North, artificial radionuclides can also be found spread at ground level. In this study, the activity concentrations of natural nuclides from the uranium and thorium series, 40K and the artificial 137Cs were determined in a sediment core with 42 cm depth collected in the middle of the Salesópolis reservoir, located in the Metropolitan Region of São Paulo city (SPMR). The Usina Parque Rio Tietê reservoir belongs to the Alto do Tietê system for the capture, storage and treatment of water for SPMR. Therefore, the quality of the water and sediments of this dam is of great importance. The activity concentrations were measured by gamma spectrometry. Samples were measured and saved at regular intervals at a maximum of 160 000 seconds. The gross area were determined for each peak and plotted against time and the counting rate was obtained by the slope of the curve. Background and reference materials were also counted and treated in the same way. Results showed that 226Ra varied from 45 to 116 Bq kg-1; 228Ra, from 80 to 165 Bq kg-1; 40K, from 155 to 1 187 Bq kg-1 and 137Cs varied from 0.3 to 7 Bq kg-1. The methodology applied for determining low levels of 137Cs in sediment proved to be efficient and reproducible.
Upgrading safety systems of industrial irradiation facilities
Authors: Gomes Rogerio Dos Santos , Gomes Joana D'Arc Ramos Lopes , Da Costa Evaldo Luiz Correa , Costa Mara Lucia De Lara , Thomé Filho Zieli Dutra
Published: April 2019

The first industrial irradiation facility in operation in Brazil was designed in the 70s. Nowadays, twelve commercial and research facilities are in operation and two already decommissioned. Minor modifications and upgrades, as sensors replacement, have been introduced in these facilities, in order to reduce the technological gap in the control and safety systems. The safety systems are designed in agreement with the codes and standards at the time. Since then, new standards, codes and recommendations, as well as lessons learned from accidents, have been issued by various international committees or regulatory bodies. The rapid advance of the industry makes the safety equipment used in the original construction become obsolete. The decreasing demand for these older products means that they are no longer produced, which can make it impossible or costly to obtain spare parts and the expansion of legacy systems to include new features. This work aims to evaluate existing safety systems at Brazilian irradiation facilities, mainly the oldest facilities, taking into account the recommended IAEA´s design requirements. Irrespective of the fact that during its operational period no event with victims have been recorded in Brazilian facilities, and that the regulatory inspections do not present any serious deviations regarding the safety procedures, it is necessary an assessment of safety system with the purpose of bringing their systems to "the state of the art", avoiding their rapid obsolescence. This study has also taken into account the knowledge, concepts and solutions developed to upgrading safety system in irradiation facilities throughout the world.
Constructional requirements and classification of nucleonic gauges
Authors: Gomes Joana D'Arc Ramos Lopes , Costa Mara Lucia De Lara , Gomes Rogério Dos Santos , Da Costa Evaldo Luiz Correa , Thomé Filho Zieli Dutra , Caldas Gustavo Henrique Flores
Published: April 2019

There are several hundred of nucleonic gauges installed in at least 500 industrial facilities in Brazil. In recent years, several standards have been issued by different international committees in order to specify requirements for the design of nucleonic gauges taking into account issues related to radiological protection. The aspects of design and manufacturing of these devices using radioactive sources should be treated as an important feature to an adequate safety approach during the whole operational life, mainly taking into account the extreme conditions of the places where the devices are installed. Thus, the agreement with these standards should be included as part of the equipment specification to the licensing process, however, most nucleonic gauges were installed in the period prior to the issuance of these international standards. In this work was studied the performance of shielding design taking into account international standards concerning the constructional requirements and classification of gauges. In view of the specific operational conditions found at reference facilities, the measurements obtained will be used for validation of a Monte Carlo code based on GEANT4 to allow extrapolations for other operational conditions. The results obtained in this study can enable the establishment of a safety indicator tool to industrial facilities, taking into account different designs, so that this additional parameter can be used to determine and to optimize the frequency of regulatory inspections.
Study on welding thermal cycle and residual stress of UNS S32304 duplex stainless steel selected as external shield for a transport packaging of Mo-99
Authors: Betini Evandro Giuseppe , Gomes Maurilio Pereira , Milagre Mariana Xavier , Machado Caruline De Souza Carvalho , Mendes dos Reis Luis Augusto , Mucsi Cristiano S , D'Azeredo Orlando Marcos Tadeu , Luz Temistocles Souza , Martinez Luis Gallego , Rossi Jesualdo Luiz
Published: April 2019

Thin plates of duplex stainless steel UNS S32304 were welded using the pulsed gas tungsten arc GTAW process (butt joint) without filler addition. The used shielding gas was pure argon and 98% argon plus 2% of nitrogen. The thermal cycles were acquired during welding, in regions near the melting pool. This alloy is candidate for the external clad of a cask for the transport of high activity radiopharmaceuticals substances. For the residual stress measurements in austenite phase an X-ray diffractometer was used in a Bragg-Brentano geometry with CuKα radiation (λ= 0.154 nm) and for ferrite phase was used a pseudo-parallel geometry with CrKα radiation (λ= 0.2291nm). The results of residual stress using sin2y methodology shown that the influence of the high welding temperature leads to compressive stresses for both phase of the duplex steels mainly in heat-affected zone. It was observed a high temperature peak and an increase of the mean residual stress after addition of nitrogen to the argon shielding gas.
Evaluation of gastric emptying by means of scintigra-phy using different test meals
Authors: Montoya Viviana , Parisitto Viviane , Fontes Mateus , Gonzaga Luiz , Das Graças Luciene , Prata Arnaldo
Published: April 2019

Gastroparesis is a disorder characterized by symptoms and evidence of delayed gastric emptying (GE) in the absence of mechanical obstruction. Scintigraphy has been considered a "gold standard" for measuring Gastric Emptying Time (GET) and retention percentage of radio-labeled food, after four hours of ingestion. To obtain the images, it is recommended, worldwide, the use of the Tougas diet (255kcal) as a standard meal. The objective of this study was to compare the GET and the percentage of retention in the time of 4 h, obtained by scintigraphy using the Tougas diet (255 kcal) and the proposed diet (319 kcal). Thirty patients, both genders, aged 23 to 76 years,  were selected, they presenting clinical symptoms suggestive of gastroparesis. These parameters were measured for the same patient, but in different days. The results showed that the diet fat content used to obtain EG of solid foods by scintigraphy did not influence the retention percentage results after 4 hours of ingestion of the radiolabeled food. However, the time of two hours is an important parameter to be observed in the result of this examination. In addition, the data suggest that the proposed diet may be more efficient for the classification of the severity of EG delay in patients with clinical signs suggestive of gastroparesis.
Evaluation of mercury levels in hair of children resident in artisanal gold mining area in the city of Chapada de Natividade - Tocantins
Authors: Mendes Seyna Ueno Rabelo , Vasconcellos Marina Beatriz Agostini , Catharino Marilia Gabriela Miranda , Quinaglia Gilson Alves , Held Barbara
Published: April 2019

ABSTRACT The objective of the work is to evaluate the mercury exposure of children living in an artisanal gold mining area and in a control area, without mining. A cross-sectional study was conducted with children living in the municipalities of Chapada de Natividade and Porto Nacional, in the State of Tocantins, where hair samples were collected for laboratorial analysis of mercury concentrations, comparing between municipalities, gender, monthly fish consumption, profession of parents and the presence of amalgam in dental restorations. The hair samples were analyzed by the methods of neutron activation analysis and also by means of the DMA (Direct Mercury Analyzer) equipment, in the last case being a partnership with CETESB. There was no evidence of mercury-related diseases in the studied children. The mean concentration of mercury in children in Chapada de Natividade was significantly higher than in Porto Nacional. Children exposed to artisanal gold mining areas have higher concentrations of mercury than children living in non- artisanal gold mining areas. There was no significant relationship between mercury concentrations and gender, monthly fish consumption, parental profession and amalgam presence in dental restorations. The results suggest that the children living in an area exposed to mining experience greater environmental exposure to mercury, regardless of their eating habits.
O documentário de divulgação científica: tipos e potencialidades de uso no ensino.
Authors: Pereira Aldo Aoyagui Gomes , Domingues Silmara Rodrigues , De Carvalho Aline Rodrigues
Published: April 2019

A partir de atividades realizadas utilizando documentários com licenciandos de uma disciplina intitulada Práticas do Ensino de Física, verificamos o potencial destes recursos para o desenvolvimento de práticas em disciplinas científicas do ensino médio. Ao mesmo tempo, verificamos que pesquisas na área de ensino de ciências identificaram que o uso destes recursos em sala de aula, por parte de professores da educação básica, se dá, em grande parte, para motivar, ilustrar e reforçar conteúdos científicos. Neste trabalho, sugerimos outras formas de utilizarmos documentários de divulgação cientifica em sala de aula, tendo como apoio teórico os modelos do déficit, contextual e de participação pública de divulgação da ciência. Selecionamos cinco documentários produzidos pela BBC, PBS e History Chanel e sugerimos atividades e questões endereçadas às disciplinas científicas do ensino médio. Entre elas, destacamos o potencial destes recursos para a discussão de questões envolvendo a natureza da ciência e debates sociocientíficos. Além disso, discutimos a relevância de se trabalhar as representações de ciência contida em recursos audiovisuais, principalmente, numa sociedade como a nossa, onde a principal fonte de informação sobre ciência, ao longo da vida destes jovens, será as diversas manifestações da mídia.
Indicações oficiais e resultados iniciais da política de ampliação do ensino fundamental
Authors: Silva Jaqueline Cristina da , Ramos Géssica Priscila
Published: April 2019

Há mais de 10 anos, está em vigência, no Brasil, a Lei n. 11.274/06, que alterou a duração do ensino fundamental e antecipou o ingresso da criança no ensino fundamental. Assim, o objetivo deste artigo é relacionar os resultados das pesquisas sobre o ensino fundamental de nove anos, de 2010 a 2016, com o amparo oficial referente ao Programa Ampliação do Ensino Fundamental para Nove Anos no Brasil, tendo como procedimentos metodológicos a revisão bibliográfica e a pesquisa documental. Os dados obtidos levaram-nos a perceber que, apesar do amparo oficial, essa proposta de ampliação chegou às escolas sem uma efetiva preparação dos docentes e gestores, que, com base no imediatismo e espontaneísmo, e por meio de esforços individuais, tem feito o possível para conseguirem efetivar a mudança.
Apresentação - Dossiê Lazer, educação e tecnologia
Authors: Silva Cinthia Lopes da
Published: April 2019

Este dossiê é parte dos produtos finais do “V Colóquio Educação Física e Ciências Sociais em diálogo”, evento realizado em parceria entre as instituições Universidade Metodista de Piracicaba (UNIMEP) e Universidade Federal de São Paulo (UNIFESP/Guarulhos), no mês de outubro de 2018. O evento teve como tema “Lazer, Educação e Tecnologia”, tendo como aporte teórico um referencial voltado a gerar melhorias na Educação Básica brasileira, sobretudo ao que se refere aos processos de ensino e aprendizagem.
Lazer e educação em parques urbanos: a comunicação visual no Parque Ibirapuera
Authors: Facini Karine Regina , Lopes Danilo Dos Santos , Uvinha Ricardo Ricci
Published: April 2019

O presente trabalho se insere no eixo temático Lazer, Tecnologias de Informação e Comunicação e se relaciona ao usufruto do turismo em parques urbanos, analisando a comunicação visual no Parque Ibirapuera como um dos elementos essenciais da hospitalidade. O procedimento metodológico adotado foi o qualitativo, combinando observação participante e aplicação de questionário semiestruturado. A observação participante permitiu verificar a carência de sinalização em geral, tanto nos portões que dão acesso ao parque, como no interior do mesmo. A partir da coleta de dados, foi possível compreender que a maior parte dos entrevistados aponta a comunicação visual do mesmo com o conceito regular, ressaltando que a sinalização é insuficiente para direcionar um público em tal parque, em especial nos finais de semana. Sendo assim, conclui-se que a comunicação visual é um elemento importante para a educação no lazer, tornando o ambiente mais hospitaleiro e que, neste sentido, o Parque Ibirapuera não parece ser um ambiente tão acolhedor quanto poderia. Propõem-se, como possíveis soluções: a inserção de sinalização em locais estratégicos do parque, a promoção do aplicativo de celular desenvolvido pelo próprio parque e sua disponibilização em mais dois idiomas (inglês e espanhol), bem como a contratação de guias de turismo e animadores socioculturais para atender e orientar os visitantes.
İlkokul Birinci Sınıf Öğrencilerinin Dik Temel Yazı ile Kelime Yazım Hatalarının İncelenmesi
Authors: BABAYİĞİT Özgür
Published: April 2019

Bu
araştırmanın amacı ilkokul birinci sınıf öğrencilerinin dik temel yazı ile
kelime yazım hatalarının incelenmesidir. Araştırma, nitel araştırma
yöntemlerinden doküman analizi yöntemiyle gerçekleştirilmiştir. Kolay
ulaşılabilir durum örneklemesi kapsamında Yozgat ili Merkez ilçedeki bir devlet
ilkokulunda birinci sınıfta öğrenim gören 84 öğrenci ile çalışılmıştır.
Araştırma, 2018 yılı mayıs ayında gerçekleştirilmiştir. Veri toplama aracı
olarak, “İlkokul Türkçe 1 Ders Kitabı”nda yer alan “Bir Okul Gezisi” başlıklı
metin kullanılmıştır. Öğrencilere metindeki bir paragraf öğrencilerce çizgili
kâğıda dikte edilmiştir. Elde edilen verilerin analizinde içerik analizi
tekniği kullanılmıştır. Öğrencilerin yazmış oldukları paragraflar incelendikten
sonra, belirli kodlar, kategoriler ve temalar altında gruplandırılmıştır.
İlkokul birinci sınıf öğrencilerinin dik temel harflerle kelime yazım
yanlışlarının incelendiği bu araştırmada yapılan içerik analizi sonucunda altı
adet temaya ulaşılmıştır. Ulaşılan bu temalar şunlardır: Harfler arasında uygun
olmayan boşluk, harf eksikliği, harf fazlalığı, harf değiştirme, harflerin aynı
hizada yazılmayışı, hece ekleme. Ulaşılan sonuçlar kapsamında önerilerde
bulunulmuştur.