bluuebunny/crossref_metadata_2025 huggingface dataset:
VISIBILIDADES DO TRABALHO DE MULHERES RURAIS NA REDE SOCIAL DIGITAL FACEBOOK
Authors: Pinheiro Naira Leticia , Schwengber Maria Simone Vione
Published: March 2020

Entendemos que as redes sociais lançam novas formas de visibilidade a partir de uma existência-virtual nas redes sociais, que permitem compor novas formas de posições de sujeitos. Este artigo objetiva analisar algumas publicações de mulheres rurais na rede social digital Facebook, tomando-as como memórias do tempo presente. Perguntamos: Que publicações são essas e o que produzem? Trata-se de uma pesquisa de caráter netnográfico, estratégica metodológica escolhida como ponte de acesso aos discursos das mulheres permitindo, consequentemente, maior compreensão do mapeamento, das produções, distribuição das publicações. Escolhemos a análise do discurso na perspectiva foucaultiana, mapeando a materialidade simbólica na cadeia significante entre discursos e imagens. Observamos que as publicações desse grupo de mulheres rurais rompem o aspecto mudo da cultura de silêncio em relação as experiências de trabalho e as transformam em direção à celebração de um reconhecimento de suas ações laborais, produzindo, assim, uma certa política de visibilidade do trabalho “pesado” na terra.
Increased severity of anaemia is associated with 30-day complications following total joint replacement
Authors: Gu Alex , Malahias Michael-Alexander , Selemon Nicolas A. , Wei Chapman , Gerhard Eleanor F. , Cohen Jordan S. , Fassihi Safa C. , Stake Seth , Bernstein Sophie L. , Chen Aaron Z. , Sculco Thomas P. , Cross Michael B. , Liu Jiabin , Ast Michael P. , Sculco Peter K.
Published: March 2020

Aims

The aim of this study was to determine the impact of the severity of anaemia on postoperative complications following total hip arthroplasty (THA) and total knee arthroplasty (TKA).

Methods

A retrospective cohort study was conducted using the American College of Surgeons National Quality Improvement Program (ACS-NSQIP) database. All patients who underwent primary TKA or THA between January 2012 and December 2017 were identified and stratified based upon hematocrit level. In this analysis, we defined anaemia as packed cell volume (Hct) < 36% for women and < 39% for men, and further stratified anaemia as mild anaemia (Hct 33% to 36% for women, Hct 33% to 39% for men), and moderate to severe (Hct < 33% for both men and women). Univariate and multivariate analyses were used to evaluate the incidence of multiple adverse events within 30 days of arthroplasty.

Results

Following adjustment, patients in the THA cohort with moderate to severe anaemia had an increased odds of 6.194 (95% confidence interval (CI) 5.679 to 6.756; p < 0.001) for developing any postoperative complication. Following adjustment, patients in the TKA cohort with moderate to severe anaemia had an increased odds of 5.186 (95% CI 4.811 to 5.590; p < 0.001) for developing any postoperative complication. Among both cohorts, as severity increased, there was an increased risk of postoperative complications.

Conclusion

Preoperative anaemia is a risk factor for complications following primary arthroplasty. There is a significant relationship between the severity of anaemia and the odds of postoperative complications. Patients who had moderate to severe anaemia were at increased risk of developing postoperative complications relative to patients with mild anaemia. When considering elective primary THA or TKA in a moderately or severely anaemic patient, surgeons should strongly consider correcting anaemia prior to surgery if possible. Cite this article: Bone Joint J 2020;102-B(4):485–494.
Patellofemoral arthroplasty is cheaper and more effective in the short term than total knee arthroplasty for isolated patellofemoral osteoarthritis: cost-effectiveness analysis based on a randomized trial
Authors: Fredborg Charlotte , Odgaard Anders , Sørensen Jan
Published: March 2020

Aims

The aim is to assess the cost-effectiveness of patellofemoral arthroplasty (PFA) in comparison with total knee arthroplasty (TKA) for the treatment of isolated patellofemoral osteoarthritis (OA) based on prospectively collected data on health outcomes and resource use from a blinded, randomized, clinical trial.

Methods

A total of 100 patients with isolated patellofemoral osteoarthritis were randomized to receive either PFA or TKA by experienced knee surgeons trained in using both implants. Patients completed patient-reported outcomes including EuroQol five-dimension questionnaire (EQ-5D) and 6-Item Short-Form Health Survey questionnaire (SF-6D) before the procedure. The scores were completed again after six weeks, three, six, and nine months, and again after one- and two-year post-surgery and yearly henceforth. Time-weighted outcome measures were constructed. Cost data were obtained from clinical registrations and patient-reported questionnaires. Incremental gain in health outcomes (quality-adjusted life-years (QALYs)) and incremental costs were compared for the two groups of patients. Net monetary benefit was calculated assuming a threshold value of €10,000, €35,000, and €50,000 per QALY and used to test the statistical uncertainty and central assumptions about outcomes and costs.

Results

The PFA group had an incremental 12 month EQ-5D gain of 0.056 (95% confidence interval (CI) 0.01 to 0.10) and an incremental 12 month cost of minus €328 (95% CI 836 to 180). PFA therefore dominates TKA by providing better and cheaper outcomes than TKA. The net monetary benefit of PFA was €887 (95% CI 324 to 1450) with the €10,000 threshold, and it was consistently positive when different measures of outcomes and different cost assumptions were used.

Conclusion

This study provides robust evidence that PFA from a one-year hospital management perspective is cheaper and provides better outcomes than TKA when applied to patients with isolated patellofemoral osteoarthritis and performed by experienced knee surgeons. Cite this article: Bone Joint J 2020;102-B(4):449–457.
The effect of anterior cruciate ligament resection on knee biomechanics
Authors: Kayani Babar , Konan Sujith , Ahmed Syed S , Chang Justin S , Ayuob Atif , Haddad Fares S
Published: March 2020

Aims

The objectives of this study were to assess the effect of anterior cruciate ligament (ACL) resection on flexion-extension gaps, mediolateral soft tissue laxity, maximum knee extension, and limb alignment during primary total knee arthroplasty (TKA).

Methods

This prospective study included 140 patients with symptomatic knee osteoarthritis undergoing primary robotic-arm assisted TKA. All operative procedures were performed by a single surgeon using a standard medial parapatellar approach. Optical motion capture technology with fixed femoral and tibial registration pins was used to assess study outcomes pre- and post-ACL resection with knee extension and 90° knee flexion. This study included 76 males (54.3%) and 64 females (45.7%) with a mean age of 64.1 years (SD 6.8) at time of surgery. Mean preoperative hip-knee-ankle deformity was 6.1° varus (SD 4.6° varus).

Results

ACL resection increased the mean extension gap significantly more than the flexion gap in the medial (mean 1.2 mm (SD 1.0) versus mean 0.2 mm (SD 0.7) respectively; p < 0.001) and lateral (mean 1.1 mm (SD 0.9) versus mean 0.2 mm (SD 0.6) respectively; p < 0.001) compartments. The mean gap differences following ACL resection did not create any significant mediolateral soft tissue laxity in extension (gap difference: mean 0.1 mm (SD 2.4); p = 0.89) or flexion (gap difference: mean 0.2 mm (SD 3.1); p = 0.40). ACL resection did not significantly affect maximum knee extension (change in maximum knee extension = mean 0.2° (SD 0.7°); p = 0.23) or fixed flexion deformity (mean 4.2° (SD 3.2°) pre-ACL release versus mean 3.9° (SD 3.7°) post-ACL release; p = 0.61). ACL resection did not significantly affect overall limb alignment (change in alignment = mean 0.2° valgus (SD 1.0° valgus; p = 0.11).

Conclusion

ACL resection creates flexion-extension mismatch by increasing the extension gap more than the flexion gap. However, gap differences following ACL resection do not create any mediolateral soft tissue laxity in extension or flexion. ACL resection does not affect maximum knee extension or overall limb alignment. Cite this article: Bone Joint J 2020;102-B(4):442–448.
Complications following surgery for adolescent idiopathic scoliosis over a 13-year period
Authors: Kwan Kenny Y. H. , Koh Hui Y. , Blanke Kathleen M. , Cheung Kenneth M. C.
Published: March 2020

Aims

The purpose of this study was to evaluate the incidence and analyze the trends of surgeon-reported complications following surgery for adolescent idiopathic scoliosis (AIS) over a 13-year period from the Scoliosis Research Society (SRS) Morbidity and Mortality database.

Methods

All patients with AIS between ten and 18 years of age, entered into the SRS Morbidity and Mortality database between 2004 and 2016, were analyzed. All perioperative complications were evaluated for correlations with associated factors. Complication trends were analyzed by comparing the cohorts between 2004 to 2007 and 2013 to 2016.

Results

Between 2004 and 2016, a total of 84,320 patients were entered into the database. There were 1,268 patients associated with complications, giving an overall complication rate of 1.5%. Death occurred in 12 patients (0.014%). The three most commonly reported complications were surgical site infection (SSI) (441 patients; 0.52%), new neurological deficit (293; 0.35%), and implant-related complications (172; 0.20%). There was a statistically significant but weak correlation between the occurrence of a SSI and the magnitude of the primary curve ( r = 0.227; p < 0.001), and blood loss in surgery ( r = 0.111; p = 0.038), while the occurrence of a new neurological deficit was correlated statistically significantly but weakly with age at surgery ( r = 0.147; p = 0.004) and magnitude of the primary curve ( r = 0.258; p < 0.001). The overall complication rate decreased from 4.95% during 2004 to 2007 to 0.98% during 2013 to 2016 (p = 0.023).

Conclusion

An overall complication rate of 1.5% was found in our series after surgery for AIS, with a reduction of complication rates found in the second period of the analysis. Cite this article: Bone Joint J 2020;102-B(4):519–523.
Screening and characterization of sponge-associated bacteria from Seribu Island, Indonesia producing cellulase and laccase enzymes
Authors: WENANG MAHARSIWI  , RIKA INDRI ASTUTI  , ANJA MERYANDINI  , Wahyudi Aris Tri
Published: March 2020

Abstract. Maharsiwi W, Astuti RI, Meryandini A, Wahyudi AT. 2020. Screening and characterization of sponge-associated bacteria from Seribu Island, Indonesia producing cellulase and laccase enzymes. Biodiversitas 21: 975-981. Exploration of new enzymes from an extreme environment is important to improve industrial efficiency. This study aimed to get sponge-associated bacteria from Seribu Island with the capability to produce cellulase and laccase. These enzyme activities were indicated by the clear zones on CMC medium for cellulase and the reddish-brown zone on Guaiacol medium for laccase. About 100 of sponge-associated bacteria have been isolated from 5 marine sponges used SWC and NA modified media. As screened, one isolate (AGN89) could produce both enzymes and 11 isolates could produce cellulase. Quantitative analysis was performed using the DNS method and obtained the activities of 4 best cellulolytic isolates ranged from 0.04-0.06 UmL-1 and 0.70-1.18 UmL-1 in enzyme and specific activities, respectively. Gene-based determination for the isolate producing laccase resulted in a ±1100 bp amplicon fragment which identified as multicopper oxidase family protein. Based on the 16S-rRNA gene, AGN89 and these 4 cellulolytic isolates were identified as Pseudomonas luteola strain NBRC 103146, Bacillus aerius strain 24k, Pseudomonas aeruginosa strain DSM 50071, Mycobacterium maritypicum strain DSM 20578, and Brachybacterium conglomeratum strain J 1015. This result suggests that the sponge-associated bacteria from Seribu Island could become new enzymes producer for further applications in industry.
Plankton biodiversity in various typologies of inundation in Paminggir peatland, South Kalimantan, Indonesia on dry season
Authors: Yunandar Dini , HEFNI EFFENDI  , WIDIATMAKA  , YUDI SETIAWAN
Published: March 2020

Abstract. Yunandar, Effendi H, Widiatmaka, Setiawan Y. 2020. Plankton biodiversity in various typologies of inundation in Paminggir peatland, South Kalimantan, Indonesia on dry season. Biodiversitas 21: 1012-1019. The aim of the study was to analyze the typology of inundation areas and plankton biodiversity in Paminggir peatland, South Borneo, Indonesia. Typology of inundation was determined by image processing and spatial analysis using supervised classification method from Landsat 1994, 2014, 2019. Plankton biodiversity was determined using purposive sampling in detected inundation from spatial analysis. Some environmental factors like temperature, Ph and DO were also analyzed. Confirmation of the results of spatial analysis of peatland typology made from overall accuracy and Kappa informed 88.48% and 0.8. The typology of permanent inundation decreased by 30% from 1994 to 2019 during the dry period from June to August of the total study area of 43275,584 hectares due to sedimentation, land conversion for settlement, and increase in water weeds. Inundation criteria with duration throughout the year were was categorized as permanent, whereas temporary inundation was tentative even in certain dry season. Plankton index biodiversity in permanent inundation was more varied compared to temporary inundation. Phytoplankton from the freshwater Chrysophyta group was more dominant, while zooplankton from the Nauplius group, which were the natural food for fish larvae always presented in the typology of permanent inundation.
Methylene blue decolorizing bacteria isolated from water sewage in Yogyakarta, Indonesia
Authors: Michelle  , Siregar Rachel Arvy Nabasa , Sanjaya Astia , Lucy Jap , Pinontoan Reinhard
Published: March 2020

Abstract. Michelle, Siregar RAN, Sanjaya A, Jap L, Pinontoan R. 2020. Methylene blue decolorizing bacteria isolated from water sewage in Yogyakarta, Indonesia. Biodiversitas 21: 1136-1141. The textile industry contributes to water pollution issues all over the world. One of the most commonly applied cationic dye in the textile industry is methylene blue. This study aimed to isolate bacteria with the potential to decolorize methylene blue from dye contaminated sewage water located in Kulon Progo District, Yogyakarta, where several textile industries within the proximity, are located. Characterizations of bacterial candidates were done morphologically and biochemically. Molecular identification was conducted by 16S rRNA sequencing. The ability of isolates to decolorize methylene blue was observed by the reduction of methylene blue’s maximum absorption at the wavelength of 665 nm. The results showed that isolates were identified as Comamonas aquatica and Ralstonia mannitolilytica. C. aquatica PMB-1 and R. mannitolilytica PMB-2 isolates were able to decolorize methylene blue with decolorization percentage of 67.9% and 60.3%, respectively when incubated for 96 hours at 37°C. These findings present information on the capability of the genus Ralstonia and Comamonas to decolorize methylene blue cationic dye.
Diversity and distribution of microalgae in coastal areas of East Java, Indonesia
Authors: UMI ZAKIYAH  , MULYANTO  , LUCIA TRI SUWANTI  , MOCHAMAD DONNY KOERNIAWAN  , EKO AGUS SUYONO  , ARIEF BUDIMAN  , Siregar Ulfah Juniarti
Published: March 2020

Abstract. Zakiyah U, Mulyanto, Suwanti LT, Koerniawan MD, Suyono EA, Budiman A, Siregar UJ. 2020. Diversity and distribution of microalgae in coastal areas of East Java, Indonesia. Biodiversitas 21: 1149-1159. Indonesia is well known as one of hotspot for biodiversity, including marine resources. However, Indonesia biodiversity has declined rapidly due to the changes in the aquatic environmental quality as the consequence of human activities. Biodiversity loss has been well studied in larger organisms, however, less is known for microorganisms, such as microalgae. Microalgae have received much attention recently due to its potential as renewable energy sources. This study aimed at describing biodiversity and distribution of microalgae in coastal areas of East Java and Madura, Indonesia. Six sites, i.e. Trenggalek and Sendangbiru representing south coast, Banyuwangi and Situbondo representing north coast of East Java, Pasongsongan and Pamekasan representing Madura north and south coast, respectively were sampled, which representing different background of anthropogenic development in these areas. Results showed that seawater condition in all sites is still good, with average pH 8.0 despite intense human activities, such as ecotourism, fishing and boat harbor, as well as residential area that has the potential to produce a lot of waste. Totally, there were 35 genera from all locations with varying abundance in each location and diversity index ranging from 1.105-3.312. Although most genera belonged to Bacyllariophyta, domination indices showed that there was not any single specific domination in all locations. Morisita indices showed that most distribution gave positive values indicating clumped dispersion of microalgae in all locations. Higher Shannon-Weaver indices characterized the south coast of East Java and Madura compared to the north coast of East Java area, which corresponded with lower dominancy indices.
Short Communication: Proximate analysis, amino acid profile and albumin concentration of various weights of Giant Snakehead (Channa micropeltes) from Kapuas Hulu, West Kalimantan, Indonesia
Authors: Pratama Wahyu Wira , Nursyam Happy , Hariati Anik Martinah , Islamy R Adharyan , VERYL HASAN
Published: March 2020

Abstract. Pratama WW, Nursyam H, Hariati AM, Islamy RA, Hasan V. 2020. Short Communication: Proximate analysis, amino acid profile and albumin concentration of various weights of Giant Snakehead (Channa micropeltes) from Kapuas Hulu, West Kalimantan, Indonesia. Biodiversitas 21: 1196-1200. Fish is an important foodstuff due to its nutritional value and high protein. One of popular fish as a foodstuff in tropical Asia is giant snakehead fish (Channa micropeltes). This study aims to examine the proximate composition, amino acid profile, and albumin concentration of giant snakeheads in various weights and to determine the best weight of giant snakeheads according to the proximate, amino acid, and albumin concentration. This research used natural-caught giant snakehead as a material of study, which was categorized into 4 weight sizes consisting of 4-5 grams (B1), 6-14 grams (B2), 15-34 grams (B3), 35-300 grams (B4). Based on the results of the test, the highest water content was found in B1 of 80.5%, the highest levels of protein and fat were in the B4 group of 16.8% and 1.7%, respectively. The highest total amino acid profile was found in B4, with the highest composition of essential amino acids, lysine, which was 2.02%, while the composition of the highest non-essential amino acid in glutamate was 3.60%. The highest albumin levels were in the B4 group which was 16.7%. According to the result of this research, the best weight to consume according to the proximate analysis (Protein, fat content), amino acid profile, and albumin concentration is a giant snakehead at the weightiest of 35-300 grams (B4).
Optimization and characterization of enterocin Enterococcus faecalis K2B1 isolated from Toraja’s Belang Buffalo Milk, South Sulawesi, Indonesia
Authors: Alang Hasria , JONI KUSNADI  , TRI ARDYATI  , SUHARJONO
Published: March 2020

Abstract. Alang H, Kusnadi J, Ardyati T, Suharjono. 2020. Optimization and characterization of enterocin Enterococcus faecalis K2B1 isolated from Toraja’s Belang Buffalo Milk, South Sulawesi, Indonesia. Biodiversitas 21: 1236-1242. The growing bacterial resistance needs to be controlled with effective antimicrobials. Bacteriocins are proteinaceous toxins produced by bacteria to inhibit the growth of pathogens. Bacteriocin industry has substantially grown, replacing the role of chemical preservatives in enhancing shelf-life and food safety. Bacteriocin produced by genera Enterococcus can be used as an antimicrobial against pathogen. In this study, we used Enterococcus faecalis K2B1 which was first isolated from Toraja’s Belang Buffalo Milk Makassar, Indonesia. The study aimed to optimization and characterization of Enterocinroduced by Enterococcus faecalis K2B1, isolated from Toraja’s Belang buffalo milk. Research Method: including optimization and characterization of antimicrobial metabolite (BLIS) using MRS broth with different initial pH (pH 6, 7 and 8), and partial purification with ammonium sulfate on different concentration (40, 60 and 80 %). Result showed that BLIS production was most optimal on MRS broth at initial pH of 8 after13th hour fermentation, at late exponential phase. BLIS characterization visibly active at high temperatures and very wide range of pH, and disappeared after treating with proteinase-K. Crude had a broad spectrum, was sensitive to Proteinase-K and estimated to have molecular weight of 5 kDa.
Anisotropy of acousto-optic figure of merit for the case of a Bragg-diffracted wave propagating along an optic axis in optically biaxial crystals: Tl3AsS4 crystals
Authors: Krupych Oleh , Adamenko Dmitro , Kostyrko Myroslav , Vlokh Rostyslav
Published: March 2020

In the present work, we analyze acousto-optic (AO) interactions under the condition when a diffracted optical wave propagates along one of the optic axes in optically biaxial crystals. We find that the number of AO interaction types is reduced from nine, which is typical for the most general case, to six, since some of the isotropic and anisotropic diffraction types manifest themselves simultaneously. We reveal that, in the case of the interactions of quasi-ordinary and quasi-extraordinary optical waves, the dependences of effective elasto-optic coefficients and AO figure of merit on the tracing angle of an incident optical beam around the optic axis are symmetric with respect to the plane that is perpendicular to the plane of optic axes and contains the principal axis

Z

. We determine the geometry of AO interactions at which the highest AO figure of merit can be expected. Finally, we show that, in the case of propagation of diffracted light along one of the optic axes in the biaxial

Tl
3

AsS
4

crystals, the highest AO figures of merit,

M

2

=
1290
×

10

−
15

s
3

/

kg

and

M

2

=
1305
×

10

−
15

s
3

/

kg

, can be reached when the quasi-longitudinal acoustic wave interacts with the quasi-ordinary or quasi-extraordinary optical waves in the plane of optic axes.
All-fiber bandwidth tunable ultra-broadband mode converters based on long-period fiber gratings and helical long-period gratings
Authors: Zhao Xinyi , Liu Yunqi , Liu Zuyao , Mou Chengbo
Published: March 2020

We demonstrated the fabrication of bandwidth tunable ultra-broadband mode converters based on CO2-laser inscribed long-period fiber gratings (LPFGs) and helical long-period gratings (HLPGs) in a two-mode fiber (TMF). The simulation and experimental results show that there is a dual-resonance coupling from LP01 to LP11 core mode at the dispersion turning point. The mode converters based on the TMF-LPFG and TMF-HLPG provide a 10-dB bandwidth of ∼300 nm and ∼297 nm, respectively, which covers O + E+S + C band. The 1st order orbital angular momentum (OAM) mode based on TMF-LPFG was generated by adjusting the polarization controllers (PCs), while the 1st order OAM mode can be generated directly by the TMF-HLPG. When the twist rate is varied from -36 rad/m ∼ 36 rad/m, the tunable range of the 10-dB bandwidth is ∼52 nm and ∼91 nm for the LPFG and HLPG mode converters, respectively. The ultra-broadband mode converter can be adopted as a bandwidth tunable mode converter, which can be applied in ultra-broadband mode-division-multiplexing transmission systems and optical fiber sensing systems based on few-mode fibers.
Quasi-static and propagating modes in three-dimensional THz circuits
Authors: Jeannin Mathieu , Gacemi Djamal , Vasanelli Angela , Li Lianhe , Davies Alexander Giles , Linfield Edmund , Biasol Giorgio , Sirtori Carlo , Todorov Yanko
Published: March 2020

We provide an analysis of the electromagnetic modes of three-dimensional metamaterial resonators in the THz frequency range. The fundamental resonance of the structures is fully described by an analytical circuit model, which not only reproduces the resonant frequencies but also the coupling of the metamaterial with an incident THz radiation. We also demonstrate the contribution of the propagation effects, and show how they can be reduced by design. In the optimized design, the electric field energy is lumped into ultra-subwavelength (λ/100) capacitors, where we insert a semiconductor absorber based on the collective electronic excitation in a two dimensional electron gas. The optimized electric field confinement is exhibited by the observation of the ultra-strong light-matter coupling regime, and opens many possible applications for these structures in detectors, modulators and sources of THz radiation.
Study of the structural stability and electronic structure of Ce-related defects in diamonds
Authors: Tan Xin , Wei Xueyuan , Chen Luhua , Liu Zhixin
Published: March 2020

Based on the first-principle method of density functional theory (DFT), the parameters of the CeV (general term for Ce-related defects) color center of diamonds are optimized and calculated using Vienna Ab-initio Simulation package software in this study. The structure of the diamond CeV2 color center is the most stable when the Ce atom is located at the substitution site with the presence of two vacancies nearby. The electronic structure of the diamond CeV2 color center is calculated on the basis of this stable structure, and the charge transfer between Ce and C atoms is determined. The energy band structure and the density of states verify that the impurity states in the band are mainly composed of the 5d and 4f orbitals of Ce atoms. The ground state of the color center of the diamond CeV2 is located in the 4f orbit, and the excited state is in the 5d orbit. The zero phonon line of the color center of the diamond CeV2 is predicted to be 2.528 eV, and the corresponding fluorescence wavelength is 490.82 nm. This can provide a theoretical basis for preparing the diamond CeV color center for subsequent experiments.
Demonstration of non-Hermitian symmetry (NHS) serial-complex-valued orthogonal frequency division multiplexing (SCV-OFDM) for white-light visible light communication (VLC)
Authors: Adnan Assaidah , Liu Yang , Chow Chi-Wai , Yeh Chien-Hung
Published: March 2020

We demonstrate a non-Hermitian symmetry orthogonal frequency division multiplexing (NHS OFDM), known as serial-complex-valued (SCV)-OFDM for the white-light phosphor-based light-emitting-diode (LED) visible light communication (VLC) system. The white-light LED system can provide both VLC and lighting simultaneously. The proposed scheme is based on the fast-Fourier-transform (FFT)/invert-FFT (IFFT) size efficient technique proposed before. The real (Re) and imaginary (Im) parts of the complex-valued OFDM signals are extracted and time-serially multiplexed to achieve NHS. The proposed scheme is simple and only needs a single LED transmitter (Tx) and one receiver (Rx). The encoding and decoding of the proposed SCV-OFDM are also discussed.
Prevalence of soft tissue calcifications in cone beam computed tomography images in the region of head and neck
Authors: Diniz Vandeberg , Araújo Elaine Cristina de Carvalho Beda Correa de , Gonçalves Bianca Costa , Fardim Karolina Aparecida Castilho , Manhães Junior Luiz Roberto C , Tango Estela Kaminagakura , Silva Isis Patricia Soares da , Lopes Sérgio Lúcio Pereira Castro
Published: March 2020

Objective: to evaluate the prevalence of calcifications in the soft tissues of the cervical-facial region using cone beam computed tomography (CBCT) images. Material and Methods: two hundred and ten CBCT exames was analyzed by 01 examiner previously trained, with fild of view (FOV) of 16 x 13 cm and voxel of 0.25 mm, in ICAT Vision software (Imaging Science International, Hatfield, PA, USA) in coronal, axial and sagittal sections. The following calcifications were evaluated: tonsiloliths, sialolites, calcification of the styloid complex, calcified carotid atheromas, calcifications in laryngeal cartilages, calcified lymph nodes and osteoma cutis. The findings were tabulated according to the total of the sample, related to the gender, age group of the individuals. Results: Calcification of the styloid complex was the most frequent in the sample studied in both genres (39.04%), followed by the presence of tonsiloliths (19.52%), and calcified lymph nodes (6,67%). Conclusion: calcifications are frequent radiographic findings in CBCT and important for the diagnosis of some possible pathologies that do not present clinical symptoms.KEYWORDSCone-beam computed tomography; Prevalence; Soft tissue calcification.
Prevalence of Melanin Pigmentation in a Yemeni Population and its Relation to Some Risk Factors
Authors: Alhajj Mohammed Nasser , Alhajj Wadhah Abdulnasser
Published: March 2020

Objective: The present study aimed to explore the prevalence of melanin pigmentation in a sample of Yemeni population and its relation to some possible risk factors. Material and Methods: This crosssectional study was performed on 440 patients attending a private clinic. Printed questionnaires were introduced to the patients and a clinical examination was performed for each patient. The questionnaire included questions regarding demographic data, and questions regarding some common habits such as smoking, khat chewing and consuming of hot drinks. Melanin pigmentation was assessed regarding its presence, most affected areas and the numbers of affected quadrants. The data were managed and analyzed using SPSS software program. Descriptive statistics and inferential statistics were performed and the associations of melanin with risk factors were evaluated at P value < 0.05. Results: Four hundred and forty patients with mean age 29 ± 8.21 years were included in the study. Of them, 67.5% were fair-skinned, 26.8% were smokers, 48.2% were khat chewers and 33.6% were hot drinks consumers. The prevalence of melanin pigmentation was 62.7%, with class I represented 56.5% of cases. Males showed more prevalence (67.9%) of melanin pigmentation than females (57.7%) with no significant difference. Results also showed more prevalence of melanin pigmentation in patients > 25 years, and darkskinned patients. Regarding habits, smoking, khat chewing and hot drink consumption habits showed significant associations with melanin pigmentation. Whereas the association of khat chewing and hot drinks alone with melanin pigmentation showed no significant relationship with melanin pigmentation while, the merge effects of khat chewing and smoking habits together with melanin pigmentation showed significant relationship with melanin pigmentation. Conclusion: It can be concluded that Yemeni people had high prevalence of melanin pigmentation with more prevalence of CL I type. Males, patients > 25 years and dark-skinned patients showed more prevalence of melanin pigmentation. Smoking, khat chewing and hot drinks consuming habits had significant associations with melanin pigmentation.KEYWORDSMelanin; Yemeni; Smoking; Khat chewing; Risk.
Mutans streptococci growth on glass ionomer incorporated with chlorhexidine: in-vivo study
Authors: Souror Yasser R , Waly Ahmed S , Abo khlifa Yousef H , Abuzenada Basem M
Published: March 2020

Background: glass ionomer is one of the most frequently used restorative materials for primary teeth restoration. It has been in use for more than 30 years. Their restoration usefulness is preferential compared to other restorations due to their fluoride release and recharge, chemical adhesion to the structure of the dentin and their range of uses. Increasing the antibacterial efficacy of restorative materials is one of the primary goals to decrease the incidence of recurrent caries. Chlorhexidine is the gold standard antibacterial agent in dentistry. Objectives: the objective of this study is to evaluate the antibacterial effect of Chlorhexidine incorporated with glass ionomer on streptococcus mutans. Methods: Thirty Children between ages ranged 6-9 years old were selected to participate in this study. Children with bilateral caries in lower second primary molars affecting the occlusal and proximal surfaces without pulpitis were included in the study. All cavities were divided into two groups; group (A) restored with Glass Ionomer and group (B) restored with Glass Ionomer Chlorhexidine mixture. The sound proximal surfaces in all cavitated teeth acted as a control. After one month, two months and three months’ plaque samples were obtained and streptococcus mutans counts were calculated. Results: The number of SM taken from sound proximal surfaces for all groups were not changed significantly in whole periods of study. At the all-time interval, the mean log10 of SM in CHX group was lower than GI group and the difference was statistically significant. There is a significant difference in the mean log10 of SM in CHX group between the 1St month and the 3rd month. Conclusion: The growth of SM was found to be higher in the sound tooth than in GI groups and in GI group was higher than in CHX- GI mixture up to three months.
Dental tooth decay profile in an institutionalized elder population of Northern Portugal
Authors: Gavinha Sandra Maria , Melo Paulo Ribeiro , Costa Liliana Gavinha , Monteiro Patrícia Manarte , Manso Maria Conceição
Published: March 2020

Objectives: the purpose of this study was to assess the dental tooth decay profile of an elderly population from Northern Portugal. Material and Methods: this is a descriptive, cross-sectional study where a questionnaire, intended to assess the institutionalized elders oral health condition, was applied with the purpose of quantifying certain oral conditions. Tooth decay was assessed using the DMFT Index for the crown’s tooth and the individual radicular caries index (RCIi) for the root’s condition assessment. Univariate analysis and multivariable logistical regressions were performed (p < 0.05) using the IBM© SPSS© Statistics vs.19.0. Results: three hundred and seventy-two elderly participants were assessed with an average age of 78.8 years, of which 260 were women (69.9%). Of the sample 30.4% had no literacy and 18.3% were dependent on their daily oral hygiene care, 30.9% (95%CI:26.2%-35.6%) were edentulous and 84.9% (95%CI:81.3%-88.5%) had less than 20 teeth. The average number of teeth was 8.9 (±8.7) and the DMFT was 25.6 (± 7.3). The RCIi for men was 44.3% (±  30.4%) and 39.4% (± 31.2%) for women. Using multivariate logistical regression model the outcome RCIi?20% was shown to be significantly and positively associated with the use of removable partial dentures (metal partial dentures: OR=5.348 (95%CI:1.176-24,329; p = 0.030) as well as with daily tooth brushing (no toothbrushing: OR = 2.802 (95%CI:1.445-5.433); p = 0.002). Conclusion: the prevalence of tooth decay in this elder institutionalized population of Northern Portugal is high, mostly due to bad oral hygiene habits associated to the use of metal removable partial dentures. Institutionalized elderly need protocols tailored to their oral health needs and integrated efforts in the institutions are needed to effectively answer the demands related to the elderly cognitive and motor skills (ageing deterioration) decline of physiological functions.KEYWORDSElderly; Oral health; Prosthesis; Root caries.
Formulation of Isohydricity Conditions in Acid-Base systems - A Review
Authors: Michałowska-Kaczmarczyk Anna M. , Michałowski Tadeusz
Published: March 2020

The isohydricity conditions are formulated for D+T systems composed of titrand D and titrant T, mixed according to titrimetric mode; only acid-base equilibria are involved there. The original method of dissociation constants determination, based on the isohydricity principle, is presented and confirmed experimentally. The pH titrations in the system of isohydric solutions are also put in context with conductometric titrations.
ENSURING RELIABILITY FOR COMPLEX TECHNICAL SYSTEMS LIKE MOVABLE MOUNTINGS OF SPECIAL PURPOSE
Authors: Trukhanov V. M. , Fedorova N. V. , Trukhanov G. V.
Published: March 2020

The article is devoted to the question of ensuring the reliability of complex technical systems such as special purpose mobile units for extended service life. The features of maintainability of complex systems as one of the properties of mobile units, which must be taken into account in the development of structures, provide them in the manufacture and maintain during operation at a given level of quantitative reliability. The qualitative analysis of design solutions to ensure accessibility to places of control and maintenance, meet the requirements for interchangeability, unification and structural and technological continuity is described. Mathematical dependences for assessing the maintainability of special-purpose mobile installations in the form of distribution laws and failure recovery times are presented, as well as mathematical dependencies on the determination of spare parts and materials necessary for timely ensuring reliability, in particular maintainability, during operation.
Ein Naturbegriff für die Technikfolgenabschätzung
Authors: Beecroft Richard
Published: March 2020

Diskussion
Aporte Metodológico para un diagnóstico del sector justicia: La percepción local experta de su democratización
Authors: LLoret Juan Sebastián , Rubinovich Marcos
Published: March 2020

El trabajo expone la metodología aplicada y algunos resultados de validación de la investigación científica abordada sobre el sistema de administración de justicia de la provincia de Salta, en la República Argentina[1]. Con ella, el equipo buscó realizar un diagnóstico sobre las perspectivas y posicionamientos de abogados referentes y expertos del orden local respecto a la necesidad y sentido de la eventual reforma que juzgarían conveniente hacer, para propiciar la justa solución de los conflictos de índole civil, penal o de interés público. La tarea metodológica se orientó a conocer el estado de situación, los consensos sobre cambios expectables y metas de democratización y de legitimación social posibles, todo desde la perspectiva realista de decisores locales relevantes. El proceso de evaluación se basó en una matriz F.O.D.A. (fortalezas, oportunidades, debilidades y amenazas) en aplicación combinada con el método Delphi, que incluyó una reunión presencial con los encuestados similar a la prevista en la dinámica de focus group, indagando las necesidades normativas, institucionales y educativas prioritarias para lograr un desarrollo democrático del sistema de resolución de conflictos jurídicos en la provincia. [1] El proyecto de investigación N° 163/2017, denominado “Diagnóstico experto del avance y democratizaciónde los procesos de resolución de conflictos jurídicos en Salta”, fue financiado por el Centro de Investigaciones de la Universidad Católica de Salta. Se vinculó institucionalmente al Vice Rectoradode Investigaciones y a la Facultad de Ciencias Jurídicas de la Universidad Católica de Salta y fue aprobadopor Resolución Rectoral núm. 1735/16. Fecha de finalización: 30/09/18. Puede verse en https://www.ucasal.edu.ar/investigacion-proyectos-en-curso El equipo estuvo conformado por el director, MSc Juan Sebastián Lloret (investigador independiente categoría A, UCaSal) y por los asesores externos: consultor en derecho de interés público, doctor Martín Böhmer (director nacional de Relaciones con la comunidad académica y la sociedad civil del Ministerio de Justicia y Derechos Humanos de la Nación); consultor en derecho civil, doctor Héctor Mario Chayer (coordinador del programa Justicia 2020 del Ministerio de Justicia y Derechos Humanos de la Nación); consultor en derecho penal, doctor Gonzalo Segundo Rúa (juez penal, experto en reformas a los sistemas procesales penales y capacitador de Cejaméricas); consultor metodológico, licenciado Víctor F. Toledo (investigador y miembro del Consejo de Investigaciones de la UCaSal); auxiliar de investigación, abogada Milagros Herrera; alumnos de apoyo a la investigación: Antonella Berzero, Romina Innamorato, Facundo Sánchez y la colaboración especial de Araceli Soriano (referencias bibliográficas), Marcos Rubinovich (anexos gráficos).
Anisotropic problems with unbalanced growth
Authors: Alsaedi Ahmed , Ahmad Bashir
Published: March 2020

The main purpose of this paper is to study a general class of (p, q)-type eigenvalues problems with lack of compactness. The reaction is a convex-concave nonlinearity described by power-type terms. Our main result establishes a complete description of all situations that can occur. We prove the existence of a critical positive value λ
* such that the following properties hold: (i) the problem does not have any entire solution in the case of low perturbations (that is, if 0 < λ < λ
*); (ii) there is at least one solution if λ = λ
*; and (iii) the problem has at least two entire solutions in the case of high perturbations (that is, if λ > λ
*). The proof combines variational methods, analytic tools, and monotonicity arguments.
The Adjunction Inequality for Weyl-Harmonic Maps
Authors: Ream Robert
Published: March 2020

In this paper we study an analog of minimal surfaces called Weyl-minimal surfaces in conformal manifolds with a Weyl connection (M4, c, D). We show that there is an Eells-Salamon type correspondence between nonvertical 𝒥-holomorphic curves in the weightless twistor space and branched Weyl-minimal surfaces. When (M, c, J) is conformally almost-Hermitian, there is a canonical Weyl connection. We show that for the canonical Weyl connection, branched Weyl-minimal surfaces satisfy the adjunction inequality

\chi \left( {{T_f}\sum } \right) + \chi \left( {{N_f}\sum } \right) \le \pm {c_1}\left( {f*{T^{\left( {1,0} \right)}}M} \right).

The ±J-holomorphic curves are automatically Weyl-minimal and satisfy the corresponding equality. These results generalize results of Eells-Salamon and Webster for minimal surfaces in Kähler 4-manifolds as well as their extension to almost-Kähler 4-manifolds by Chen-Tian, Ville, and Ma.
Statistical Modelling and Optimisation of the Biosorption of Cd(II) and Pb(II) onto Dead Biomass of Pseudomonas Aeruginosa
Authors: Ighalo Joshua O. , Adeniyi Adewale George
Published: March 2020

Dead biomass of micro-organisms can be used as biosorbents for the mitigation of heavy metal pollution in the aqueous environment. The aim of this study was to statistically model and optimise the sorption of Cd(II) and Pb(II) by dead biomass of Pseudomonas aeruginosa and to study the interactions between operating conditions. Statistically significant models were obtained for Cd(II) and Pb(II) sorption. The standard deviation for the Cd(II) and Pb(II) models were 0.86 and 1.54 while the coefficient of determination (R2) were 0.9978 and 0.9928 respectively. For both models, the adjusted R2 was in good agreement with the predicted R2 as the difference was less than 0.2. Numerical optimisation revealed that optimum Cd(II) removal of 88.6 % can be achieved at 1.172 ppm initial metal concentration, pH of 8.85, temperature of 43.72 °C, agitation time of 125.96 minutes and dead cell mass of 114.8 mg. Also, an optimum Pb(II) removal of 100 % can be achieved at 1.936 ppm initial metal concentration, pH of 6.88, temperature of 37.24 °C, agitation time of 130.57 minutes and dead cell mass of 122.85 mg. The study has revealed that at careful selected operational parameters, dead biomass of Pseudomonas aeruginosa can be valorised for the removal of heavy metals in aqueous media.
Design of Compact Highpass Filter for 5G mm-wave Applications Using Complementary Split Ring Resonator
Authors: Ramanujam Parthasarathy , Ramesh Venkatesan P. G. , Arumugam Chandrasekar , Ponusamy Manimaran
Published: March 2020

This article presents a design of highpass filter (HPF) for millimeter-wave (mm-wave) applications using a square complementary split-ring resonator (SCSRR). A miniaturized size HPF filter is obtained by overlapping the Right-Hand (RH) and Left-Hand material. The arrangement of inter-digital parallel coupled capacitor and SCSRR offers low insertion loss, high selectivity with a sharp roll-off factor over a wide bandwidth of 15.9 GHz (from 34.1 to 50 GHz). Generally, SCSRR offers narrow passband/stopband however this prototype has a passband over a wide range of frequency. The proposed HPF has an appreciable agreement between simulated and fabricated results. Further, the filter is realized in the equivalent circuit model and their electrical elements functions are also discussed. This prototype has a cut-off frequency (fc) of 34.1 GHz with a maximum passband insertion loss of 1.45 dB. The fabricated area of the filter is 0.16λg × 0.09λg × λg and where λg is the guided wavelength at cutoff frequency fc.
Effect of growth stress and interlocked grain on splitting of seven different hybrid clones ofEucalyptus grandis×Eucalyptus urophyllawood
Authors: Nistal França Frederico José , Filgueira Amorim França Tâmara Suely , Vidaurre Graziela Baptista
Published: March 2020

Trees with high levels of growth stress begin to show log end splits (LES) immediately after harvesting, usually reaching its maximum end split in a week, and these tensions also create splits during lumber manufacturing. Interlocked grain is another characteristic that impacts the properties of eucalyptus wood. The aim of this study was to evaluate the effect of growth stress and interlocked grain patterns on log end splitting of seven different hybrid clones ofEucalyptus grandis × Eucalyptus urophyllaplanted in Brazil. The growth stress indicator (GSI) was measured in standing trees before harvesting. Splits were measured on logs in three different stages, and interlocked grain from wood blocks was obtained across the center of the cross-section. The results showed that LES occurred as soon as the trees were harvested; however, for better selection of clones, LES should be evaluated after a week of harvesting. There were statistically significant correlations for GSI with LES. Clones that presented higher values of interlocked grain tended to develop lower values of GSI and LES. Using GSI and interlocked grain measurements, it was possible to select the most indicated eucalyptus clones for lumber production.
Vemurafenib downmodulates aggressiveness mediators of colorectal cancer (CRC): Low Molecular Weight Protein Tyrosine Phosphatase (LMWPTP), Protein Tyrosine Phosphatase 1B (PTP1B) and Transforming Growth Factor β (TGFβ)
Authors: Cordeiro Helon Guimarães , de Sousa Faria Alessandra Valéria , Ferreira-Halder Carmen Veríssima
Published: March 2020

Colorectal Cancer (CRC) therapy confronts challenges as chemoresistance and side effects. Therefore, drugs with antitumor properties that downmodulate aggressiveness mediators are required. Studies have shown the relevance of Low Molecular Weight Protein Tyrosine Phosphatase (LMWPTP), Protein Tyrosine Phosphatase 1B (PTP1B), and Transforming Growth Factor β (TGFβ) in mediating proliferation, chemoresistance, and metastasis. In this study, we aimed to investigate the responsiveness of colorectal cancer lines (HT29 and HCT116) towards Vemurafenib and whether this treatment could modulate these aggressiveness mediators. Cytotoxicity Assays (MTT and Trypan Exclusion Test) were performed to evaluate the viability of HT29 and HCT116 cells treated with Vemurafenib. Western blotting was performed to analyze the amount and/or the activity of mediators (LMWPTP, PTP1B, TGFβ, SMAD3), and the immunoprecipitation was performed to evaluate LMWPTP activity. This study brought up novel aspects of Vemurafenib action in colorectal cancer, which can decrease the activity of protein tyrosine phosphatases (LMWPTP and PTP1B) and the TGFβ pathway, making them important in the CRC aggressiveness. By downmodulating colorectal cancer hallmarks, Vemurafenib appears as an interesting candidate for CRC therapeutic protocols.