bluuebunny/crossref_metadata_2025_split huggingface dataset:
The Influence of Temperature Changes in Activated Sludge Processes on Ibuprofen Removal Efficiency
Authors: Zembrzuska Joanna , Ginter-Kramarczyk Dobrochna , Zając Anna , Kruszelnicka Izabela , Michałkiewicz Michał , Dymaczewski Zbysław , Piątkowska Anna , Wawrzyniak Magdalena 
Published: July 2019

Abstract
The article presents results regarding the ibuprofen reduction rate at three various temperature values (8, 18 and 28 °C) which were conducted using a static test in accordance with the PN-C-04645 ‘Water and wastewater. Evaluation of partial biodegradation of anionic and non-ionic surface active substances. Initial test’ standard. A single study cycle including the analysis of ibuprofen degradation rate in specific temperature variants lasted 24 h. The activated sludge for tests was obtained from the aeration zone of a bioreactor localized in the Central Wastewater Treatment Plant in Poznan City (Poland), which was used for inoculation (1 g/dm3) of sterile samples with the medium and ibuprofen (10 mg/dm3) after appropriate pre-treatment (intense aeration for 5 h). The analysis procedure included the separation and concentration of analytes from biodegradation samples by means of solid phase extraction (SPE) and subsequent determination with high performance liquid chromatography coupled with mass spectrometry (LC-MS/MS) using an UltiMate 3000 RSLC liquid chromatogram (Dionex, USA) with a tandem API 4000 QTRAP mass spectrometer (Biosystem, MDS Sciex, USA). Both literature review as well as the conducted initial studies confirmed that the removal of ibuprofen proceeds more rapidly at higher temperature values. A higher retention rate also enhanced the reduction of ibuprofen concentration. A decrease of its concentration was observed after 24 h, which reached 40 and 50 % for temperature values of 8 and 18 °C, accordingly, whereas the highest reduction by approx. 65 % was noted at 28 °C.
Developing a Flexible Methodology for Modeling and Solving Multiple Response Optimization Problems
Authors: Hejazi Taha-Hossein , Moradpour Maryam 
Published: July 2019

AbstractSimultaneous optimization of multiple quality characteristics (responses) of a product or process is required in many real-world problems. Multiresponse optimization (MRO) techniques tries to solve such problems; the ultimate objective of which is to adjust control factors that provides most desired values for the responses. Regression techniques are most commonly used methods to identify and estimate relationships between control variables and responses. Due to the industrial advances and hence the complexity of processes and systems, many relationships between input variables and quality characteristics have become much more complex. In such circumstances, classic regression techniques encounter difficulties to create a well-fitted model which can be easily optimized. The alternative approach proposed in this study is a regression tree method called CART, which is a data mining method. Since the output of CART consists of several if-then terms, NSGA-II algorithm was considered to solve the model and achieve the optimal solutions. Finally, we evaluate performance of the proposed method with a real data set about modeling and improvement of automotive engines.
Flame retardant PP/PA6 blends: A recipe for recycled wastes
Authors: Vahabi Henri , Dumazert Loïc , Khalili Reza , Saeb Mohammad Reza , Cuesta José-Marie Lopez 
Published: July 2019

AbstractDisposal of plastics in the form of discarded scrap or waste is an environmental nightmare to the developed and under-developing countries. In this sense, modern technologies are every day growing; meanwhile recycling wastes are taking credit for higher performance to pave the way towards a cleaner planet. Recycling of polymer blends is associated with serious complexities in finding appropriate additives acting in each phase or at the interface of non-miscible polymers to attain materials with higher properties. A flame retardant system was designed and intended to play the role of typical recycled flame retardant polypropylene/polyamide (PP/PA6) blends by incorporation of two kinds of talc, sepiolite, and a phosphorus-based flame retardant. First, two types of talcs having different physical properties were added to PA6 in combination with melamine cyanurate (MC) or melamine pyrophosphate (MPP) to find the one acting as a barrier during combustion. Then, high-aspect-ratio talc that appeared more effective in the first-stage survey was then used in combination with MC, MPP and ammonium polyphosphate (APP) together with a compatibilizer for PP/PA6 blend. Then, thermogravimetric analysis (TGA), microcalorimeter of combustion (PCFC) and cone calorimeter measurements were performed to study thermal degradation and flammability behavior. The results are indicative of successful formulation of flame retardant system containing the aforementioned precursors to be intended to the recycled PP/PA6 blends.
An Algorithm for the Approximate Solution of the Fractional Riccati Differential Equation
Authors: Ezz-Eldien S. S. , Machado J. A. T. , Wang Y. , Aldraiweesh A. A. 
Published: July 2019

Abstract
This manuscript develops a numerical approach for approximating the solution of the fractional Riccati differential equation (FRDE):

D

μ

u
(
x
)
+
a
(
x
)

u
2

(
x
)
+
b
(
x
)
u
(
x
)
=
g
(
x
)
,

0
≤
μ
≤
1
,

0
≤
x
≤
t
,

u
(
0
)
=
d
,

$$\begin{align*}D^{\mu}&u(x)+a(x) u^2(x)+b(x) u(x)= g(x),\quad 0\leq \mu \leq 1,\quad 0\leq x \leq t,\\&u(0)=d,\end{align*}$$

where u(x) is the unknown function, a(x), b(x) and g(x) are known continuous functions defined in [0,t] and d is a real constant. The proposed method is applied for solving the FRDE with shifted Chebyshev polynomials as basis functions. In addition, the convergence analysis of the suggested approach is investigated. The efficiency of the algorithm is demonstrated by means of several examples and the results compared with those given using other numerical schemes.
Can your work affect your kidney’s health?
Authors: Nerbass Fabiana Baggio , Pecoits-Filho Roberto 
Published: July 2019

Abstract
Working conditions that impair sufficient water intake have been associated with kidney problems such as kidney stones, urinary symptoms and chronic kidney disease (CKD). Higher prevalence of these morbidities was linked to occupations that do not facilitate worker access to drinking water and toilets, as well as people who perform activities in a hot environment. In this mini-review, we aim to describe and interpret available evidence in the areas of occupation, hydration and kidney health. This review explores examples of documented kidney health problems affecting professions ranging from astronauts and teachers in developed countries to rural workers in low-income settings living in water-restricted or hot environments.
Techniken der Imagepflege als Teil schulischer Leistungserzeugung
Authors: Bräu Karin , Fuhrmann Laura 
Published: July 2019

ZusammenfassungAnhand von ethnografischen Unterrichtsprotokollen arbeiten wir im vorliegenden Beitrag heraus, dass sich die Hervorbringung von leistungsstarken Schüler*innen – in Anknüpfung an Goffman – in Praktiken der Imagepflege vollzieht. Die Schüler*innen grenzen sich dabei über Mehrarbeit von ihren Mitschüler*innen ab, um sich so als besonders fleißig und lernbereit zu inszenieren. Allerdings sind Imagepraktiken im Unterricht aufgrund hierarchischer Verhältnisse risikobehaftet und können nur gelingen, wenn die Lehrperson das Image der Schüler*innen als positiv anerkennt. Ein positives Leistungsimage kann dann auch verwehrt werden, falls Lehrer*innen und Schüler*innen verschiedene Normen als relevant für die Konstruktion einer guten Leistung aufrufen. In der Diskussion werden die herausgearbeiteten Erkenntnisse mit Hilfe einer theoretischen Heuristik, die als sensibilisierende Brille dient und ein sozialkonstruktivistisches Leistungsverständnis, den Imagebegriff von Goffman und anerkennungstheoretische Überlegungen verknüpft, weiter geschärft.
Morning plasma cortisol as a cardiovascular risk factor: findings from prospective cohort and Mendelian randomization studies
Authors: Crawford Andrew A , Soderberg Stefan , Kirschbaum Clemens , Murphy Lee , Eliasson Mats , Ebrahim Shah , Davey Smith George , Olsson Tommy , Sattar Naveed , Lawlor Debbie A , Timpson Nicolas J , Reynolds Rebecca M , Walker Brian R 
Published: July 2019

Objective
The identification of new causal risk factors has the potential to improve cardiovascular disease (CVD) risk prediction and the development of new treatments to reduce CVD deaths. In the general population, we sought to determine whether cortisol is a causal risk factor for CVD and coronary heart disease (CHD).

Design and methods
Three approaches were adopted to investigate the association between cortisol and CVD/CHD. First, we used multivariable regression in two prospective nested case-control studies (total 798 participants, 313 incident CVD/CHD with complete data). Second, a random-effects meta-analysis of these data and previously published prospective associations was performed (total 6680 controls, 696 incident CVD/CHD). Finally, one- and two-sample Mendelian randomization analyses were performed (122,737 CHD cases, 547,261 controls for two-sample analyses).

Results
In the two prospective nested case–control studies, logistic regression adjusting for sex, age, BMI, smoking and time of sampling, demonstrated a positive association between morning plasma cortisol and incident CVD (OR: 1.28 per 1 SD higher cortisol, 95% CI: 1.06–1.54). In the meta-analysis of prospective studies, the equivalent result was OR: 1.18, 95% CI: 1.06–1.31. Results from the two-sample Mendelian randomization were consistent with these positive associations: OR: 1.06, 95% CI: 0.98–1.15.

Conclusions
All three approaches demonstrated a positive association between morning plasma cortisol and incident CVD. Together, these findings suggest that elevated morning cortisol is a causal risk factor for CVD. The current data suggest strategies targeted at lowering cortisol action should be evaluated for their effects on CVD.
PERILAKU KONSUMEN TERHADAP KEPUTUSAN PEMBELIAN DI SALES AND MARKETING DEPARTMENT (STUDI KASUS DI HOTEL Y JAKARTA)
Authors: Subakti Agung Gita 
Published: July 2019

ABSTRAKMeningkatnya jumlah wisatawan di Indonesia membuat investasi di bidang pariwisata dan perhotelan semakin menjanjikan, sehingga peluang ini tentunya sangat diperhatikan oleh para investor untuk berbisnis dengan membangun hotel-hotel baru. Tujuan dari penelitian ini adalah untuk mengetahui pengaruh perilaku konsumen terhadap keputusan pembelian di Hotel Y Jakarta. Analisa yang digunakan dalam penelitian ini adalah analisa linear regresi sederhana dimana dapat digunakan untuk memprediksikan seberapa jauh perubahan nilai variabel independen terhadap variabel dependen serta juga dapat menunjukan arah hubungan antara variabel independen dan variabel dependen. Hasil dari penelitian ini menunjukkan terdapat pengaruh yang signifikan antara perilaku konsumen dan keputusan pembelian di Hotel Y Jakarta, yaitu sebesar 51% dan 49% dipengaruhi oleh faktor lain yang tidak diteliti dalam penelitian ini. Diantara kedua variabel ini juga terdapat sebuah hubungan yang kuat dan positif (0,714) yang berarti terjadi hubungan searah antara perilaku konsumen dengan keputusan pembelian. Dimana jika perusahaan dapat lebih memahami perilaku konsumen, maka diharapkan keputusan pembelian juga meningkat. Kata Kunci: Keputusan Pembelian, Perilaku Konsumen CONSUMER BEHAVIOR TOWARDS PURCHASING DECISIONS IN SALES AND MARKETING DEPARTMENT(CASE STUDY AT Y JAKARTA HOTEL) ABSTRACTThe increasing number of tourists in Indonesia has made investments in tourism and hospitality sectors became more promising, this opportunity has been seen by the investors to build new hotels and another establishment. The purpose of this study was to determine the influence of consumer behavior towards purchase decision at Hotel Y Jakarta. The analysis used in this study is the analysis of simple linear regression which can be used to predict the extent to which changes in the value of independent variable on the dependent variable and can also indicate the direction of the relationship between the independent variable and the dependent variable. The results of this study showed a significant influence between consumer behavior and purchase decision at Hotel Y Jakarta, the result is 51% and it means the 49% are influenced by other factors that not examined in this study. Among these two variables there is also a strong and positive correlation (0.714) which means there is a directional correlation between consumer behavior and purchase decisions. Wherein if the company are more concern about their consumer behavior, so it is expected that the purchase decision will also increase. Keywords: Consumer Behavior, Purchase Decision
Efficiency of the removal of microcystin-LR by UV-radiation and hydrogen peroxide
Authors: Loaiza-González Jinna Marcela , León Salazar Melba Cristina , Rubio-Clemente Ainhoa , Rodríguez Loaiza Diana Catalina , Peñuela Mesa Gustavo Antonio 
Published: July 2019

Due to the harmful effects associated with the presence of microcystin-LR (MC-LR) cyanotoxin, photo-degradation assays were performed in natural and distilled water using the combined action of ultraviolet (UV) radiation and hydrogen peroxide (H2O2). The effect of H2O2 content and UV irradiance was evaluated and optimized using a multilevel factorial design in distilled water spiked with 20 μg L-1 MC-LR. The coupled UV/H2O2 system under optimal operating conditions (0.63 mW cm-2 irradiance and 30 mg L-1 H2O2) was more effective than the individual action of UV irradiance or H2O2 content for 30 min of treatment time, since a reduction of 97.78% of MC-LR was achieved. After optimizing the operating conditions, they were applied for natural water, obtaining MC-LR removals similar to those achieved with distilled water (99.59 and 99.73%, respectively), reaching a final MC-LR concentration in both matrices well below the maximum recommended limit established by WHO for MC-LR in drinking water, fixed at 1 μg L-1. 15 mg L-1 of H2O2 were also tested, and although 98.08% of MC-LR elimination was found for a reaction time of 60 min, WHO advisable limit was not surpassed. The UV/H2O2 process could be considered as an alternative to the conventional processes water facilities are operating with to tackle the problem of fresh water pollution with cyanotoxins, providing the accomplishment of the whole set of water quality standards included in the legislation.
Quejas y acusaciones por malas prácticas de gobierno contra Francisco de Sande, Gobernador y Capitán General de las Islas Filipinas: 1575-1580.
Authors: Rojas Gómez Juan Camilo 
Published: July 2019

Siguiendo los debates historiográficos recientes sobre la corrupción en la América Hispánica, se describirán las quejas y acusaciones contra Francisco de Sande como Gobernador y Capitán General de las Islas Filipinas (1575-1580), antes de regresar a Nueva España como Oidor de la Audiencia de México y de ser promovido a Guatemala y luego al Nuevo Reino de Granada como Presidente de las audiencias de esos territorios. Se señalará que hay una continuidad en las acusaciones en su contra en todas las latitudes en las que desempeñó oficios reales, contrastando con las historiografías nacionales que han afirmado que sus malas prácticas sucedieron solo en algunos territorios. Por último, se abre la investigación a pensar en el capital relacional de Francisco de Sande para comprender las dinámicas de la corrupción en un periodo tan temprano.
Corrupciones no probadas: el «fraude» del correo mayor en nueva españa (1693-1701)
Authors: Gonzalez Martinez Nelson Fernando 
Published: July 2019

A finales del siglo XVII el Correo Mayor de Nueva España fue acusado de defraudar a la Real Hacienda en una cifra cercana a los 16.000 pesos. La denuncia fue proferida por el Conde de Moctezuma, virrey de la Nueva España. En este contexto, los Correos Mayores eran individuos encargados de coordinar la distribución de correspondencia en algunos lugares de España y las Indias. El artículo pretende analizar la manera en que fue constituida tal acusación por corrupción y por qué no logró probarse. En este caso, tuvo lugar un «escándalo» en México y Madrid, el cual derivó en una exhaustiva investigación legal y contable. Al resolverse el caso, el principal encargado de la distribución de correspondencia en Nueva España logró salvarse del desprestigio y, de cierta manera, refrendar el buen nombre de las concesiones de correos en América. La querella representa la más grande denuncia por defraudación que se hizo en contra de un Correo Mayor dentro del imperio español.
Fitotoxicidade de óleos essenciais em plantas de melancia, feijão e arroz
Authors: Brum Rúbia Borges Cruz Sarmento , Castro Henrique Guilhon , Gama Francismar Rodrigues , Gordon Carlos Henrique , Santos Gil Rodrigues 
Published: July 2019

Objetivou-se avaliar a ação dos óleos essenciais de citronela (Cymbopogon nardus), capim-limão (Cymbopogon citratus), erva-cidreira (Lippia alba) e hortelã-pimenta (Mentha piperita) sobre plantas de melancia (Citrullus lanatus), feijão-carioca (Phaseolus vulgaris) e arroz (Oryza sativa). Para cada cultura foi utilizado o delineamento inteiramente casualizado em esquema fatorial com quatro repetições, em que os fatores foram quatro tipos de óleos essenciais e quatro concentrações dos óleos (0,5; 1; 2; e 4%). Dezoito dias após o plantio, as plantas foram pulverizadas com as soluções dos óleos essenciais, e 24 horas depois foi feita a avaliação de fitotoxicidade utilizando-se a escala de notas de zero (0) (ausência de fitotoxicidade) a 100 (100%) (murcha total da planta). A concentração de 2% dos óleos essenciais avaliados foi fitotóxica para as três espécies de plantas. Em plântulas de melancia o óleo de capim-limão foi o mais fitotóxico, onde nas concentrações de 2 e 4% apresentou toxicidade de 68,75 e 75%, respectivamente. O feijão foi o menos sensível aos óleos essenciais, apresentando 50% de fitotoxicidade quando submetido aos óleos de citronela e capim-limão a 4%. Ocorreu murcha e ressecamento das plantas de arroz sob 4% dos óleos de hortelã-pimenta e citronela.
BEACH DEBRIS ON LABUANGE BEACH, BARRU DISTRICT, SOUTH SULAWESI PROVINCE, INDONESIA
Authors: Isyrini Rantih , Tambaru Rahmadi , La Nafie Yayu A. , Ukkas Marzuki , Cordova Muhammad Reza 
Published: July 2019

To support the efforts of the Indonesian government in managing marine debris that has a broad potential negative impact in various aspects, beach debris monitoring activities are urgently required in various locations. This research was carried out from June to August 2018 in the west coast region, on Labuange beach, Barru Regency, South Sulawesi Province, Indonesia, which was exposed by the Indonesian Through-Flow. The study aimed to determine the amount, weight and composition of marine debris on Labuange beach. Marine debris was sampled from a permanent line transect with an area of 150 m2 (three replications). Samples were then cleaned, sorted, counted, and weighed. The average amount of marine debris was 5.98 + 2.13 items/m2 per month, with a total weight was 138.69 ± 91.32 g/m2 per month. Plastic and rubber category dominated every sampling period in the location. The abundance of marine debris, both regarding quantity and weight, fluctuated in high amount during the sampling period, which indicated the magnitude of the role of oceanographic factors, including the direction of waves, and lack of community awareness on marine debris impacts and management. The great amount and weight of marine debris and the type of waste, which was dominated by plastic and rubber is a potential threat to humans, marine biota, and the local or global environment.
ESTIMATION OF IMPACT RADIUS OF THE COAL PLANT STACK EMISSION USING AERMOD MODEL
Authors: Assegaf Alimuddin H. Assegaf , Samad Wasir 
Published: July 2019

In environmental impact assessment of coal plant, it is essential to determine the radius impact. This information can be used to determine the impacted area, which will significantly receive the pollution emitted from the stack for years. In this study, we use the American Meteorological Society - Environmental Protection Agency Regulatory Model (AERMOD) model, which is a regulated model in the USA and other countries. Five years hourly meteorological data for feeding AERMET model was obtained from MM5 re-analysis data. Terrain data was extracted from the SRTM30 satellite image and converted into DEM. The parameter to be considered in this study is Sulfur Dioxide (SO2), Nitrogen Dioxide (NO2), and Total Suspended Particle (TSP). The calculation shows that the pollutions tend to disperse in the south direction by the wind direction. NO2 is more disperse than SO2 and TSP. Calculation of impact radius indicates that concentration of all pollutants in annual average is below the national standard. For the case of the highest one hour average gives the radius impact of 18 km for NO2 and 9 km for SO2. For the case of the highest 24 hours, only NO2 gives value beyond the standard with an impact radius of 4.5 km. Calculation of TSP indicates that concentration is below the standard in all cases. The maximum concentration of all pollutants is detected 3 km south of the stack.
KARAKTERISTIK ROTI TAWAR DENGAN SUBSTITUSI TEPUNG SORGUM (Sorghum bicolor (L) MOENCH) TERFERMENTASI DAN TANPA FERMENTASI
Authors: Sari Ardhea Mustika , Kurniawati LInda , Mustofa Akhmad 
Published: July 2019

<p>This research was aimed to determine the appropriate concentration of fermented and unfermented sorghum flour for bread making which received by the panelists. Sorghum flour was naturally fermented and then dried with cabinet dryer at 60 °C for 8 h. Substitution of sorghum flour either fermented and unfermented performed at various concentration i.e 10%, 20%, 30% and 40%. Organoleptic test results showed that white bread accepted by panelists was subtituted with fermented and unfermented sorghum flour in concentration of 10% and 20%. White bread with fermented sorghum flour substitution of 10% and 20% have moisture content of<br />28.702% and 34.392%, while white bread with unfermented sorghum flour has moisture content 28.660% and 31.857%. Ash content of white bread with fermented sorghum flour 10% and 20% were 0.823% and 0.638%, while white bread with unfermented sorghum flour 10% and 20% have ash content of 0.830% and 0.718%.<br />Fiber content of white bread subtituted with 10% and 20% fermented sorghum flour was 3.375% and 4,206% respectively whereas white bread with 10% and 20% unfermented sorghum flour have fiber content 3.008% and 3.873%. <br />Key words: fermentation, sorghum flour, white bread</p>