Journal articles on the topic 'Station C1'
To see the other types of publications on this topic, follow the link: Station C1.
Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles
Consult the top 50 journal articles for your research on the topic 'Station C1.'
Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.
You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.
Browse journal articles on a wide variety of disciplines and organise your bibliography correctly.
1
Silva, Thiago de Melo e., Simone de Fátima Pinheiro Pereira, Kellen Heloizy Garcia Freitas, Pedro Moreira De Sousa, Cléber Silva e. Silva, Davis Castro dos Santos, Ronaldo Magno Rocha, Alan Marcel Fernandes De Souza, and Daniel Pinheiro Nogueira. "USE OF GEOSTATISTICAL MODELS IN THE SPACE-TEMPORAL EVALUATION OF WATER QUALITY OF AN AMAZONIAN HYDROELECTRIC RESERVOIR." International Journal of Research -GRANTHAALAYAH 9, no. 10 (November 1, 2021): 118–29. http://dx.doi.org/10.29121/granthaalayah.v9.i10.2021.4308.
Full textAbstract:
The Tucuruí Hydro-Power Complex reservoir, Pará State, Amazon Region-Brazil, as well as other reservoirs is subject to natural alterations and anthropogenic activities which in turn affect the environmental balance. The aim of this work was to verify if geostatistical models can be used in the spatial-temporal evaluation of water quality in reservoirs. The Surfer 13® software was used to interpolate the spatial distribution of data, in two years of surface water physicochemical parameters were evaluated in sixteen sampling stations. The results of the isotopic maps showed low concentrations of DO at station C1 in the Intermediate Period 2 (summer-winter), high concentration of COD at station MP in the Intermediate Period 1 (winter-summer) and increased acidity at stations C1 and C2 in summer, suggesting that the relationship between the Tucuruí Hydro-Power Complex and farming activities in the region cause impacts on the aquatic ecosystem along the reservoir.
2
Rao, Hao, Yinhe Luo, Kaifeng Zhao, and Yingjie Yang. "Extracting surface wave dispersion curves from asynchronous seismic stations: method and application." Geophysical Journal International 226, no. 2 (April 22, 2021): 1148–58. http://dx.doi.org/10.1093/gji/ggab153.
Full textAbstract:
SUMMARY Correlation of the coda of Empirical Green's functions (EGFs) from ambient noise can be used to reconstruct EGFs between two seismic stations deployed different periods of time. However, such method requires a number of source stations deployed in the area surrounding a pair of asynchronous stations, which limit its applicability in cases where there are not so many available source stations. Here, we propose an alternative method, called two-station C2 method, which uses one single station as a virtual source to retrieve surface wave phase velocities between a pair of asynchronous stations. Using ambient noise data from USArray as an example, we obtain the interstation C2 functions using our C2 method and the traditional cross-correlation functions (C1 functions). We compare the differences between the C1 and C2 functions in waveforms, dispersion measurements, and phase velocity maps. Our results show that our C2 method can obtain reliable interstation phase velocity measurements, which can be used in tomography to obtain reliable phase velocity maps. Our method can significantly improve ray path coverage from asynchronous seismic arrays and enhance the resolution in ambient noise tomography for areas between asynchronous seismic arrays.
3
Assumpção, Marcelo, Mario Takeya, Joaquim Mendes Ferreira, João da Mata Costa, and Cláudia Moraes Sophia. "Cálculo de Magnitudes e Relação Freqüência-Magnitudes dos Sismos de João Câmara, RN." Brazilian Journal of Geophysics 7, no. 2 (July 18, 2018): 107. http://dx.doi.org/10.22564/rbgf.v7i2.1078.
Full textAbstract:
RESUMO. As magnitudes dos principais sismos da série de João Câmara de 1986-1987 foram calculadas com estações regionais e telessísmicas. Correções das estações foram determinadas permitindo obter-se valores de magnitudes mais homogêneos e com menores desvios padrão. De agosto de 1986 a fevereiro de 1987, 30 sismos tiveram magnitudes maiores ou iguais a 3,5. A magnitude do maior sismo da série (30/11/86 às 05:19:48) foi m = 5,03 ± 0,05. Uma relação empírica entre magnitude e duração do sinal (m = c1 log D + c3) na estação JC01, em João Câmara, foi estabelecida permitindo um cálculo mais rápido de magnitude de microtremores. Para durações medidas até 1 mm pico-a-pico no sismograma, c1 = 2,05 e c3 = –1,61 para m ? 2. O exame das relações frequência-magnitude (log N = a – b m) indica que o coeficiente c1 deve ser menor para magnitudes abaixo de 2, aproximadamente. Para a atividade geral de João Câmara, foi encontrado um valor típico do parâmetro b de 1,12 ± 0,04. Não foi observada variação significativa no valor de b antes e depois do maior sismo de 30/11/1986.Palavras-chave: terremoto, onda de cauda, correções de estação, Rio Grande do Norte. DETERMINATION OF MAGNITUDES AND MAGNITUDE-FREQUENCY RELATION FOR THE EARTHQUAKES OF JOÃO CÂMARA, RNABSTRACT. Magnitudes of the major events of the 1986-1987 João Câmara earthquake swarm were calculated with regional and teleseismic stations. Station corrections were determined allowing more homogeneous magnitudes with smaller standard deviations. From August 1986 to February 1987, 30 events had magnitudes greater than 3.5. The largest (November 30, 1986 at 05:19:48) had m = 5.03 ± 0.05. An empirical relation between magnitude, m, and signal duration, D, (m = c1 log D + c3) at the local station JC01 was established allowing quick estimates of magnitudes for microearthquakes. For durations measured from the P arrival to coda amplitude of 1 mm peak-to-peak, c1 = 2.05 and c3 = –1.61 for magnitudes greater than about 2. The study of the frequency-magnitude relation (log N = a – b m) shows that the coefficient c1 must be smaller for magnitudes less than about 2. For the whole activity of João Câmara, a typical b-value of 1.12 ± 0.04 was found. No significant variation was observed in the b-value before and after the main event of November 30, 1986.Keywords: earthquake, coda wave, station corrections, Rio Grande do Norte State.
4
NAIN, MOHIT, and B. K. HOODA. "Regional frequency analysis of daily maximum rainfall in Haryana." MAUSAM 72, no. 4 (November 1, 2021): 835–46. http://dx.doi.org/10.54302/mausam.v72i4.3551.
Full textAbstract:
This paper is sets-out for the regional frequency analysis of daily maximum rainfall from the 27 rain gauge stations in Haryana using L-moments. As the distribution of rainfall varies spatially in Haryana, the 27 rain gauge stations are grouped into three clusters namely, cluster C1, C2 and C3 using Ward’s clustering method and homogeneity of clusters was confirmed using L-moments-based Heterogeneity measure (H). Using goodness-of-fit measure ( ) and L-moment ratios diagram, suitable regional frequency distributions were selected among five candidate distributions; Generalized Logistic (GLO), Generalized Extreme Value (GEV),Generalized Normal (GNO), Generalized Pareto (GPA), and Pearson Type-3 (PE3) for each cluster. Results showed that PE3 and GNO were good fitted regional distribution for the cluster C1 and GEV, PE3 and GNO fitted for cluster C2 while for cluster C3; GLO and GEV were good fitted regional distribution. To select a robust distribution among good fitted distributions accuracy measures calculated using Monte Carlo simulations for each cluster. The simulation result showed that PE3 was the best choice for quantile estimation for cluster C1. For cluster C2, PE3 was the best choicefor a large return period and GEV was best for a small return period. For cluster C3, GEV was the most suitable distribution for quantile estimation. Using these robust distributions rainfall quantiles were estimated at each rain gauge station from 2 to 100 year return periods. These estimated rainfall quantiles may be rough guideline for planning and designing hydraulic structures by policy makers and structural engineers.
5
NAIN, MOHIT, and B. K. HOODA. "Regional frequency analysis of daily maximum rainfall in Haryana." MAUSAM 72, no. 4 (November 10, 2021): 835–46. http://dx.doi.org/10.54302/mausam.v72i4.531.
Full textAbstract:
This paper is sets-out for the regional frequency analysis of daily maximum rainfall from the 27 rain gauge stations in Haryana using L-moments. As the distribution of rainfall varies spatially in Haryana, the 27 rain gauge stations are grouped into three clusters namely, cluster C1, C2 and C3 using Ward’s clustering method and homogeneity of clusters was confirmed using L-moments-based Heterogeneity measure (H). Using goodness-of-fit measure ( DIST Z ) and L-moment ratios diagram, suitable regional frequency distributions were selected among five candidate distributions;Generalized Logistic (GLO), Generalized Extreme Value (GEV),Generalized Normal (GNO), Generalized Pareto (GPA), and Pearson Type-3 (PE3) for each cluster. Results showed that PE3 and GNO were good fitted regional distribution for the cluster C1 and GEV, PE3 and GNO fitted for cluster C2 while for cluster C3; GLO and GEV were good fitted regional distribution. To select a robust distribution among good fitted distributions accuracy measures calculated using Monte Carlo simulations for each cluster. The simulation result showed that PE3 was the best choice for quantile estimation for cluster C1. For cluster C2, PE3 was the best choicefor a large return period and GEV was best for a small return period. For cluster C3, GEV was the most suitable distribution for quantile estimation. Using these robust distributions rainfall quantiles were estimated at each rain gauge station from 2 to 100 year return periods. These estimated rainfall quantiles may be rough guideline for planning and designing hydraulic structures by policy makers and structural engineers.
6
Abraham Martin, R., Nathaniel S. Gates, Andrew Ning, and John D. Hedengren. "Correction: Dynamic Optimization of High-Altitude Solar Aircraft Trajectories Under Station-Keeping Constraints." Journal of Guidance, Control, and Dynamics 43, no. 11 (November 2020): 2201. http://dx.doi.org/10.2514/1.g003737.c1.
Full text
7
Sana, Youssoufou, Jacob Sanou, Salam Richard Kondombo, Louis Sawadogo, and Chantal Kabore-Zoungrana. "Optimisation de l'utilisation du Panicum maximum C1 Aeschynomene histrix, Stylosanthès hamata et, Arachis pintoï sur les performances zootechniques des lapins." International Journal of Biological and Chemical Sciences 14, no. 5 (September 14, 2020): 1633–45. http://dx.doi.org/10.4314/ijbcs.v14i5.12.
Full textAbstract:
Au Burkina Faso l’alimentation des animaux pendant la saison sèche constitue le premier contraint du développement de l’élevage. Cette étude a pour but d’évaluer l’effet d’une alimentation à base de Panicum maximum C1, Aeschynomene histrix, Stylosanthès hamata, Arachis pintoï sur les performances zootechniques des lapins. Le dispositif expérimental a été réalisé sur la Station de Recherche de Farako-Bâ. Au total, neuf (9) lapins mâles (Oryctolagus cuniculus L.) âgés de dix (10) semaines et pesant en moyenne (790 ± 39,04g) chacun, ont été répartis dans 3 cages de volume: 42 cm x 63 cm x 39 cm soit un volume de 103194 cm3 chacune. Ces lapins ont été répartis en trois (3) lots de trois (3) lapins chacun. Les lots ont reçu les rations suivantes: la ration1du lot1(R1L1) était composée de l’aliment Panicum maximum C1, Aeschynomene histrix ; la ration 2 (R2L2), Panicum maximum C1, Stylosanthès hamata et la ration 3 (R3L3), Panicum maximum C1, Arachis pintoï. A chaque ration on a ajouté du son de maïs et de riz et du sel. Les lapins nourris à la ration R3L3, ont eu un gain moyen journalier de 9,13±4,33 g/j contre 8,51±2,22g/j pour R1L1 8,90±3,33g/j pour R2L2. Une différence non significative (p > 0,05) est observée entre les trois rations. La ration R3L3 donne de bonnes performances zootechniques et constitue un atout économique pour les cunicultures.Mots clés : lapins, rations, gain moyen quotidien, alimentation
English title: Optimization of the use of Panicum maximum C1 and Aeschynomene histrix, Stylosanthes hamata and, Arachis pintoï on the zootechnical performance of rabbitsIn Burkina Faso feeding animals during the dry season is the main constraint on livestock development. This study aims to evaluate the effect of a diet based on Panicum maximum C1, Aeschynomene histrix, Stylosanthès hamata, and Arachis pintoï on the zootechnical performance of rabbits. The experimental device was carried out at the Farako-Bâ Research Station. A total of nine (9) male rabbits (Oryctolagus cuniculus L.) aged ten (10) weeks and weighing on average (790 ±39,04g) each, were distributed in three volume cages: 42 cm x 63 cm x 39 cm, each having a volume of 103194 cm3. These rabbits were divided into three (3) lots of three (3) rabbits each. The lots received the following rations: ration1 of Lot 1(R1L1) consisted of the food Panicum maximum C1 and Aeschynomene histrix; ration 2 (R2L2), Panicum maximum C1 and Stylosanthès hamata and ration 3 (R3L3), Panicum maximum C1, Arachis pintoï. Corn and rice bran and salt was added to each ration. Rabbits fed R3L3, had an average daily gain of 9,13±4,33 g/d compared to 8,51±2,22g/d for R1L1 and 8,90±3,33g/d for R2L2. There was no difference between the three rations (p > 0.05) but the R3L3 ration provides good zootechnical performance and is an economic asset for cuniculture.Keywords: Rabbits, rations, average daily gain, feed.
8
KOCAK, F., and S. AYDIN-ONEN. "Epiphytic bryozoan community of Posidonia oceanica (L.) Delile leaves in two different meadows at disturbed and control locations." Mediterranean Marine Science 15, no. 2 (April 25, 2014): 390. http://dx.doi.org/10.12681/mms.777.
Full textAbstract:
The impact of fish farming activities on Posidonia oceanica meadows in the Aegean Sea have been detected by using bryozoan epiphytes as indicators of disturbance. Samples were collected by SCUBA diving in September 2004 for comparing assemblages between disturbed (I1:0-5 m; I2:5-10 m and I3:10-15 m) and control meadows (C1:0-5 m; C2:5-10 m and C3:10-15 m) located at different depths. Regarding to mean percentage cover of bryozoans, significant differences were found between stations, leaf sides, depths and their interactions (p<0.05). Bryozoan species were colonized densely on back side of the adult leaves. Bantariella verticillata, Alcyonidium sp., Aetea truncata, Chorizopora brongniartii, Fenestrulina joannae were frequently observed species on P. oceanica leaves. B. verticillata showed statistically significant side and station differences while other species showed only significant side differences. Moreover, the mean coverage of Aetea truncata showed neither station nor side variations. B. verticillata could be evaluated as an appropriate key species for environmental changes. In the impacted meadow, higher mean coverage values of the species were particularly determined on front side of the leaves. These results suggest that characteristics of localities, leaf sides and leaf parts can be responsible factors on coverage value of epiphytic bryozoan species.
9
Lou, Dan, Mengxi Yang, Dawei Shi, Guojie Wang, Waheed Ullah, Yuanfang Chai, and Yutian Chen. "K-Means and C4.5 Decision Tree Based Prediction of Long-Term Precipitation Variability in the Poyang Lake Basin, China." Atmosphere 12, no. 7 (June 28, 2021): 834. http://dx.doi.org/10.3390/atmos12070834.
Full textAbstract:
The machine learning algorithms application in atmospheric sciences along the Earth System Models has the potential of improving prediction, forecast, and reconstruction of missing data. In the current study, a combination of two machine learning techniques namely K-means, and decision tree (C4.5) algorithms, are used to separate observed precipitation into clusters and classified the associated large-scale circulation indices. Observed precipitation from the Chinese Meteorological Agency (CMA) during 1961–2016 for 83 stations in the Poyang Lake basin (PLB) is used. The results from K-Means clusters show two precipitation clusters splitting the PLB precipitation into a northern and southern cluster, with a silhouette coefficient ~0.5. The PLB precipitation leading cluster (C1) contains 48 stations accounting for 58% of the regional station density, while Cluster 2 (C2) covers 35, accounting for 42% of the stations. The interannual variability in precipitation exhibited significant differences for both clusters. The decision tree (C4.5) is employed to explore the large-scale atmospheric indices from National Climate Center (NCC) associated with each cluster during the preceding spring season as a predictor. The C1 precipitation was linked with the location and intensity of subtropical ridgeline position over Northern Africa, whereas the C2 precipitation was suggested to be associated with the Atlantic-European Polar Vortex Area Index. The precipitation anomalies further validated the results of both algorithms. The findings are in accordance with previous studies conducted globally and hence recommend the applications of machine learning techniques in atmospheric science on a sub-regional and sub-seasonal scale. Future studies should explore the dynamics of the K-Means, and C4.5 derived indicators for a better assessment on a regional scale. This research based on machine learning methods may bring a new solution to climate forecast.
10
Hasnaoui, M., J. Kassila, M. Loudiki, M. Droussi, G. Balvay, and G. Barrouin. "Relargage du phosphore à l'interface eau-sédiment dans des étangs de pisciculture de la station Deroua (Béni Mellal, Maroc)." Revue des sciences de l'eau 14, no. 3 (April 12, 2005): 307–22. http://dx.doi.org/10.7202/705422ar.
Full textAbstract:
De l'urée et du super phosphate triple ont été appliqués aux étangs d'alevinage de carpes chinoises de la station Deroua pour stimuler la croissance des algues. Toutefois, une forte proportion de ce phosphore est fixée par les sédiments et sera libérée en grande quantité dans les étangs lorsque les sédiments sont en conditions anaérobies. Nous avons étudié le relargage des orthophosphates par les sédiments provenant de deux étangs différents. L'un (A1) en terre ce qui permet la percolation des éléments nutritifs vers les couches profondes, l'autre (C1) dont le fond recouvert d'une fine membrane en polyéthylène, est parfaitement imperméable et empêche toute perte. Par ailleurs, nous avons étudié les effets de l'oxygène dissous, du pH, des nitrates et du glucose sur le relargage des orthophosphates par les sédiments. Les résultats obtenus montrent qu'en anaérobiose, la solubilité du phosphore augmente dans l'eau interstitielle. Les orthophosphates libérés, dont la concentration peut atteindre 873 µg/l, proviennent de la fraction minérale en particulier du Fe(OOH)=P. Le sédiment C1 qui accumule de grandes quantités de matière organique libère plus de phosphore que le sédiment A1. L'addition des nitrates limite la mobilisation du phosphore à partir des sédiments. Le pH acide provoque la dissolution du phosphore lié au calcium alors qu'un pH alcalin provoque celle du phosphore lié aux hydroxydes de fer et sa précipitation partielle sur les carbonates présents dans les sédiments.
11
Lo Frano, Rosa, Salvatore Angelo Cancemi, Piotr Darnowski, Riccardo Ciolini, and Sandro Paci. "Preliminary Analysis of an Aged RPV Subjected to Station Blackout." Energies 14, no. 15 (July 21, 2021): 4394. http://dx.doi.org/10.3390/en14154394.
Full textAbstract:
Today, 46% of operating Nuclear Power Plants (NPP) have a lifetime between 31 and 40 years, while 19% have been in operation for more than 40 years. Long Term Operation (LTO) is an urgent requirement for all of the nuclear industry. The aim of this study is to assess the performance of a reactor pressure vessel (RPV) subjected to a station blackout (SBO) event. Alterations suffered by the material properties and creep at elevated temperatures are considered. In this study, coupling between MELCOR and Finite Element Method (FEM) codes is carried out. In the Finite Element (FE) model, the combined effects of ageing and creep are implemented through degraded material properties and a viscoplastic model. The reliability of the model is validated by comparing the FOREVER/C1 experimental results. The results show that the RPV lower head bends downwards with a maximum radial expansion of about 260 mm and RPV thermomechanical properties are reduced by more than 50% at high temperatures. The effects of ageing, creep and long heat-up strongly affect the resistance of the RPV system until the point of compromising it in the absence of/delayed emergency intervention. Aged RPV at end-of-life may collapse earlier, and in less time, with the same accidental conditions.
12
Abusuwar, Awad O., and Refaat A. Abohassan. "Effect of Moringa olifera Leaf Extract on Growth and Productivity of Three Cereal Forages." Journal of Agricultural Science 9, no. 7 (June 7, 2017): 236. http://dx.doi.org/10.5539/jas.v9n7p236.
Full textAbstract:
Moringa olifera leaf extract at different concentrations were used to evaluate their effects on three cereal forages (Sorghum bicolor L. Moench, Penisetum typhoideum Rich and Sorghum Sudanese) grown under stress environment of soil and water salinity in an arid environment. Three independent experiments carried out at King Abdulaziz University Experimental Station, Makkah province during 2015 and 2016. Treatments consisted of four concentrations of Moringa olifera leaf extract: (C1 = 1 ml of juice + 10 ml of distilled water ,C2 = 1 ml of juice + 20 ml of distilled water, C3 = 1 ml of juice + 30 ml of distilled water and C4 = 1 ml of juice + 40 ml of distilled water in addition to distilled water alone as a control). Results showed that the higher concentration C1 contained the highest amount of inorganic elements and growth hormones compared to other concentrations. This in turn reflected in significant higher growth and forage yields of the three forage crops tested. Significant increases in growth and forage yields in both seasons reported for the higher concentration C1 compared to others. Fresh and dry forage yields of Millet, during 2016, increased by the higher concentration over the control treatment by 17.67 and 4.87%, respectively. Results indicated the effectiveness of Moringa leaf extract in improving growth and increasing productivity of cereal forages under harsh environment of salinity and aridity.
13
Almada, Melina S., Alda González, and José A. Corronca. "Evaluation of the design effects of different agropastoral systems on the diversity and density of spiders." Spanish Journal of Agricultural Research 15, no. 1 (April 20, 2017): e0301. http://dx.doi.org/10.5424/sjar/2017151-9712.
Full textAbstract:
Sustainable agro-ecological design is challenging when the goal is self-regulation of the system. The objective of this study was to evaluate if the agropastoral design system affects the spider community, as spiders are the main predators in these production systems, and to determine those designs which maximize the diversity and density of spiders. The study was conducted during 2009/2010, at the Experimental Research Station of Agriculture (EEA-INTA) Reconquista (Santa Fe, Argentina) where we considered four different designs: C1 (five agricultural fields), C2 (three agricultural fields and four livestock fields), C3 (six agricultural fields and one livestock field) and C4 (five agricultural fields and one forest area). In each design, the spiders were collected by pitfall traps and suction samples with a G-Vac (garden-vacuum). The designs proposed were considered on the basis of environmental heterogeneity. The C4 treatment had the greatest number of species, followed by C2, C3 and C1 (183, 178, 144 and 142 species, respectively), and C2 presented the greatest abundance of spiders followed by C4, C3 and C1 (n=5708, 4785, 4271 and 3448, respectively). Eight guilds were present in C3 and C4. This study is the first to evaluate the diversity of spiders in agropastoral systems in Argentina. Our results show that designs that include more fields with livestock or equal to those for agriculture, as well as forest areas, increase environmental heterogeneity. Therefore, the presence of a biological controller and dominant predatory group will be possible with sustainable designs that have environmental heterogeneity, contributing to improved pest control in agricultural systems.
14
Zhang, Xiyu, Shuning Dong, Pengkang Jin, Jidong Liang, Jian Yang, and Yongan Huang. "Study on the Migration Law of Dissolved Organic Matter in Mine Water Treatment Station." Water 14, no. 20 (October 21, 2022): 3339. http://dx.doi.org/10.3390/w14203339.
Full textAbstract:
With the improvement of coal-mining mechanizations and the intensification of human activities, the organic matter pollution of mine water is becoming severe. In this study, the chemical compositions of the influents and effluents from 15 mine water treatment stations in the mining area bordering Mongolia and Shaanxi were measured. The occurrence of DOM (dissolved organic matter) in the effluent from the mine water treatment stations in this area was determined by the EEM (excitation emission matrix), combined with the PARAFAC (parallel factor analysis) method. The DOM removal from the mine water treatment station in the Caojiatan coal mine is specifically discussed here, although trends are similar across the 15 mines. The treatment capacity of this treatment process for different types of pollutants is also evaluated, and a mine water treatment process suitable for the current coal-mining mode is suggested. The results show that the DOM of the mine water treatment stations in this area mainly has four components: a fulvic-acid-like substance (C1/C3), a protein tryptophan-like substance (C2), and a protein tyrosine-like substance (C4). The coagulation, filtration, and disinfection process has a removal efficiency of more than 90% for the protein-like tryptophan components, COD (chemical oxygen demand), and NO2−, and an efficiency of ~50% for TOC (total organic carbon), <30% for Cu2+ and F−, and almost no removal effect for protein-like tyrosine components, EC (electrical conductivity), TDS (total dissolved solids), and NH4+. These conclusions show that aliphatic hydrocarbons, such as alkanes and cycloalkanes, in mine water are removed by the treatment process, whereas macromolecular aromatic hydrocarbons and other groups are not removed by the treatment process. Based on this, an ozone-demulsification process for the special removal of protein tyrosine-like pollutants in mine water is proposed. This conclusion can provide theoretical support for research on the source and fate of the carbon trajectory in the water-cycle process and provides technical guidance for the removal of DOM from mine water.
15
HASSEN, CHERAITIA. "A bayesian analysis of the annual maximum temperature using generalized extreme value distribution." MAUSAM 72, no. 3 (October 22, 2021): 607–18. http://dx.doi.org/10.54302/mausam.v72i3.1310.
Full textAbstract:
The annual maximum temperature was modeled using the Generalized Extreme Value (GEV) distribution to Jijel weather station. The Mann-Kendall (MK) and Kwiatkowski Phillips, Schmidt and Shin (KPSS) tests suggest a stationary model without linear trend in the location parameter. The Kurtosis and the Skewness statistics indicated that the normality assumption was rejected. The Likelihood Ratio test was used to determine the best model and the goodness-of-fit tests showed that our data is suitable with a stationary Gumbel distribution. The Maximum Likelihood estimation method and the Bayesian approach using the Monte Carlo method by Markov Chains (MCMC) were used to find the parameters of the Gumbel distribution and the return levels were obtained for different periods.
JEL Classification: C1, C13, C46, C490.
16
Bartosiewicz, Aleksandra, and Paulina Szterlik. "The competitiveness of small Baltic container terminals. The PROMETHEE II multi-criteria analysis." Logistics and Transport 44, no. 4 (2019): 5–14. http://dx.doi.org/10.26411/83-1734-2015-4-44-1-19.
Full textAbstract:
The article examines the competitiveness of small Baltic container terminals. In order to conduct the research, thirty terminals, whose annual maximum throughput capacity does not exceed 150,000 TEU, have been examined taking into consideration a number of criteria which are: length of the quay (C1), number of RTG (C2) and STS (C3) cranes, number of shortsea shipping connections (C4), maximum (technical) depth at the quay (C5), distance from motorways and expressways/national roads (C6), distance from the national railway station (C7). Selected k=7 criteria were used to perform PROMETHEE II (Preference Ranking Organization Method for Enrichment Evaluations II) multi-criteria ranking that enabled specifying those Baltic Sea container nodes which are in the area of strategic benefits for the analysed market sector.
17
Halbedel, S., O. Büttner, and M. Weitere. "Linkage between the temporal and spatial variability of dissolved organic matter and whole-stream metabolism." Biogeosciences 10, no. 8 (August 19, 2013): 5555–69. http://dx.doi.org/10.5194/bg-10-5555-2013.
Full textAbstract:
Abstract. Dissolved organic matter (DOM) is an important resource for microbes, thus affecting whole-stream metabolism. However, the factors influencing its chemical composition and thereby also its bio-availability are complex and not thoroughly understood. It was hypothesized that whole-stream metabolism is linked to DOM composition and that the coupling of both is influenced by seasonality and different land-use types. We tested this hypothesis in a comparative study on two pristine forestry streams and two non-forestry streams. The investigated streams were located in the Harz Mountains (central Europe, Germany). The metabolic rate was measured with a classical two-station oxygen change technique and the variability of DOM with fluorescence spectroscopy. All streams were clearly net heterotrophic, whereby non-forestry streams showed a higher primary production, which was correlated to irradiance and phosphorus concentration. We detected three CDOM components (C1, C2, C3) using parallel factor (PARAFAC) analysis. We compared the excitation and emission maxima of these components with the literature and correlated the PARAFAC components with each other and with fluorescence indices. The correlations suggest that two PARAFAC components are derived from allochthonous sources (C1, C3) and one is derived autochthonously (C2). The chromophoric DOM matrix was dominated by signals of humic-like substances with a highly complex structure, followed by humic-like, fulfic acids, low-molecular-weight substances, and with minor amounts of amino acids and proteins. The ratios of these PARAFAC components (C1 : C2, C1 : C3, C3 : C2) differed with respect to stream types (forestry versus non-forestry). We demonstrated a significant correlation between gross primary production (GPP) and signals of autochthonously derived, low-molecular-weight humic-like substances. A positive correlation between P / R (i.e. GPP/daily community respiration) and the fluorescence index FI suggests that the amount of autochthonously produced DOM increased overall with increasing GPP. In accordance with the coupling between DOM and the metabolism, our data also indicate that the composition of DOM is subject to seasonal fluctuations. We concluded that temporal and spatial differences in DOM composition are driven by whole-stream metabolism, in addition to pronounced effects coming from allochthonous sources.
18
Huang, Huiming, Xiantao Huang, and Siqi Li. "Three-dimensional Tidal Dynamic Characteristics and Tidal Current Energy Evaluation in the Southern Sea Area of Hainan Island." Journal of Physics: Conference Series 2418, no. 1 (February 1, 2023): 012053. http://dx.doi.org/10.1088/1742-6596/2418/1/012053.
Full textAbstract:
Abstract Tidal current energy is a kind of marine renewable energy. It has broad application prospects. In this paper, a three-dimensional tidal current numerical model was established, and the model was verified by the measured data of the tide level station. Based on the numerical model, the tidal current feature and tidal current energy distribution were accurately simulated and analyzed in the southern sea area of Hainan Island. The results showed that the annual average velocity of the current was evenly distributed among the space in the study area. But the annual cumulative time of typical velocity in different sea areas was different in space. C2 had more accumulative time for the low-velocity range (<0.4m/s) of the surface, while C1 had more accumulative time for the low-velocity range (<0.3m/s) of the water depth of 8.5m. C3 sea area had more accumulative time in the high-velocity range at the surface (0.4~2.0m/s) and water depth of 8.5m (>0.3m/s). And the area with the highest annual average tidal current energy density at the water depth of 8.5m was C3, which is up to 128.40w/m2. C2 sea area had the smallest energy, only 62.63w/m2. Compared with C1 and C2 sea areas, the C3 area should be developed emphatically when developing tidal current energy resources in this sea area.
19
Hadda Mebarki, Ouassila Ziane, Hadjer Merbah, and Hamenna Bouzerzour. "Assessment of flag leaf water status as drought tolerance discriminating trait in durum wheat (Triticum turgidum var durum L.)." Magna Scientia Advanced Research and Reviews 2, no. 1 (May 30, 2021): 016–27. http://dx.doi.org/10.30574/msarr.2021.2.1.0026.
Full textAbstract:
Drought is a prominent limiting factor that impacts negatively durum wheat grain yield. Ten durum wheat breeding lines were evaluated under rainfall conditions at the Field Crop Institute Agricultural Experimental Station of Setif, Algeria, during the 2016/2017 cropping season. The investigation aimed to study the ability of flag leaf water status to discriminate among varieties for drought tolerance trait. Significant variability was observed among the tested varieties for leaf dry, wilted and turgid weights, leaf relative water content, water saturation deficit and excised water loss, after three wilting periods of 30, 60 and 90 minutes dehydration at 40°C. The assessed breeding lines were differentially categorized as drought tolerant and drought sensitive based on either relative water content or water saturation deficit or excised leaf water loss genotypic mean values. Correlation, principal components and cluster analyses indicated an unwanted significant association between excised leaf water loss and relative water content and water saturation deficit and classified the assessed entries into three clusters (CI, C2 and C3). Cluster C1 had high relative water content, low water saturation deficit but high excised water loss, while C3 had low relative water content, low excised leaf water but high-water saturation deficit, C2 being intermediate. Crosses between distant clusters (C1 vs C3) are proposed to generate more variability of the targeted traits in progeny population and to break undesirable linkage between alleles controlling leaf water status, allowing to select efficiently drought tolerant genotypes.
20
Halbedel, S., O. Büttner, and M. Weitere. "Linkage between the temporal and spatial variability of dissolved organic matter and whole stream metabolism." Biogeosciences Discussions 9, no. 12 (December 17, 2012): 18253–93. http://dx.doi.org/10.5194/bgd-9-18253-2012.
Full textAbstract:
Abstract. Dissolved organic matter (DOM) is an important resource for microbes, thus affecting the whole stream metabolism. The factors influencing its chemical composition and thereby also its bio-availability are complex and not thoroughly understood. We hypothesized that the whole stream metabolism itself can affect the DOM composition and that the coupling of both is influenced by seasonality and different land use forms. We tested this hypothesis in a comparative study on two pristine forestry streams and on two non-forestry streams. The investigated streams were located in the Harz Mountains (Central Europe, Germany). The whole stream metabolism was measured with a classical two station oxygen change technique and the variability of DOM with fluorescence spectroscopy. We take also into account the geochemical and geophysical characteristic of each stream. All streams were clearly net heterotrophic, whereby the non-forestry streams showed a higher primary production in general, which was correlated with irradiance and with the total phosphorus concentration. The whole stream metabolism but also the chromophoric DOM (CDOM) showed distinct seasonal patterns. We detected three CDOM component groups (C1, C2, C3) by the use of the parallel-factor-analysis (PARAFAC) and found temporarily variable, typical component fingerprints (C1:C2, C1:C3, C3:C2) for CDOM originated from forestry streams and from non-forestry streams. Based on comparative literature studies and correlation analysis with different indices, we demonstrate that two of the components are clearly from terrigenous sources (C1, C3) and one is rather autochthonously (C2) derived. The whole CDOM matrix was dominated by humic like, high molecular-weight substances, followed by humic like, fulfic acids, low molecular-weight substances, and with minor amounts of amino-acids and proteins. We showed for the first time a correlation between the gross primary production (GPP) and the autochthonously derived, low molecular weight DOM. The amount of autochthonously produced DOM increased overall with increasing GPP, as indicated by a tight, positive correlation between the fluorescence index (FI, R2 = 0.84) or C2 (R2= 0.48) and the ratio of GPP and the daily community respiration (CR24). This study showed for the first time the linkage between whole stream metabolism and DOM composition, based on a new integrated approach. We demonstrated that this relationship is influenced by seasonality and different land use forms. These complex mechanisms lead to typical DOM fingerprints for streams pass through the different land use forms.
21
Brima Zidane Ferdiyan and Erwin Setyo Nugroho. "Pekanbaru City Election Recapitulation Information System uses Input from Telegram API." Jurnal RESTI (Rekayasa Sistem dan Teknologi Informasi) 4, no. 1 (February 2, 2020): 56–63. http://dx.doi.org/10.29207/resti.v4i1.1391.
Full textAbstract:
In the process of the regional head election, there is a recapitulation process for the vote acquisition conducted by the KPPS (Voting Organizers Group) at each TPS (polling station). Where this process usually takes a very long time and also causes a lot of problems. In Pekanbaru City, the information on the recapitulation of the regional head election sent to the candidate pairs or the supporting party was still based on the SMS (Short Message Service) gateway which made the candidate pairs/supporting parties have to do the recapitulation manually again. From these problems, the Pekanbaru City Regional Head Election Recapitulation Information System was built using Inputs from the Telegram API that can solve these problems. From the results of testing the black box on the system by following the ISO 9126-2 standard, the results on each metric have a number of 1 and an average of 1 which means that the system's functions are in accordance with needs and expectations. In performance testing the average delay time when the bot is sent data in the form of images (command /c1) is 4.447 seconds, while when the bot is sent data in the form of text/numbers (commands other than /c1) the average delay time is less than 1.5 seconds. In the user acceptance testing, this information system is very helpful for the candidate pair and the bearer party in conducting vote recapitulation during the regional head election process and also get the results of the recapitulation of votes with detail and realtime.
22
Awaludin. "STUDI MALAPRAKTEK PEMILU DI TEMPAT PEMUNGUTAN SUARA PADA PEMUNGUTAN DAN PENGHITUNGAN SUARA PEMILU SERENTAK TAHUN 2019 DI KABUPATEN BUTON." Electoral Governance Jurnal Tata Kelola Pemilu Indonesia 1, no. 1 (November 13, 2019): 104. http://dx.doi.org/10.46874/tkp.v1i1.34.
Full textAbstract:
This study aims to determine the forms of Election malpractice that occur in the process of voting and counting at polling stations (TPS) in the implementation of simultaneous elections in 2019 in Buton District. Other than that, this study also aims to identify what factors influence the occurrence of Election Malappractice in Buton District, focus on the process of voting and counting at polling stations. The method used in this study is description research. Data sources in writing this thesis consist of primary data and secondary data. Primary data in the form of interviews and observations. Structured interviews were conducted with election organizers in Buton Regency in this case members of Bawaslu, KPU, PPK, PPS and KPPS. While observations in the voting and counting process are conducted in 2 (two) different polling stations, namely TPS 001 Bungi Village, and 004 TPS, Kombeli Village. Meanwhile, secondary data in the form of voter data, data on the results of voting and counting, recapitulation of the results of vote counting, letters, and regulations related to the voting and counting process. The data that has been obtained is then analyzed by reducing, presenting and drawing conclusions. The results of the study showed that there were malpractices in the election in the process of voting and counting at polling stations in the form of ghost voters, double voting, writing inaccurate C1 form, manipulation of vote acquisition of Election participants, lack of logistics, inaccurate voter data, voting that does not provide comfort for all groups of voters and the implementation of voting and counting in a certain degree it is not transparent and inaccurate. While the factors that influence the occurrence of malpractice are in the form of heavy workload, lack of competency of KPPS officers, changing regulations and no legal certainty, witnesses to the Election participants did not understand their duties and roles at the polling station, and a large amount of logistics.
23
Primeia, Sandia, Chihiro Inoue, and Mei-Fang Chien. "Potential of Biosurfactants’ Production on Degrading Heavy Oil by Bacterial Consortia Obtained from Tsunami-Induced Oil-Spilled Beach Areas in Miyagi, Japan." Journal of Marine Science and Engineering 8, no. 8 (July 31, 2020): 577. http://dx.doi.org/10.3390/jmse8080577.
Full textAbstract:
Bioremediation is one of the promising environment-friendly approaches to eliminate oil contamination. However, heavy oil is known to degrade slowly due to its hydrophobicity. Therefore, microorganisms capable of producing biosurfactants are gaining substantial interest because of their potential to alter hydrocarbon properties and thereby speed up the degradation process. In this study, six bacterial consortia were obtained from the oil-spilled beach areas in Miyagi, Japan, and all of which exhibited high potential in degrading heavy oil measured by gas chromatography with flame ionization detector (GC-FID). The polymerase chain reaction—denaturing gradient gel electrophoresis (PCR-DGGE) and next-generation sequencing (NGS) revealed that the diverse microbial community in each consortium changed with subculture and became stable with a few effective microorganisms after 15 generations. The total petroleum hydrocarbons (TPH) degradation ability of the consortia obtained from a former gas station (C1: 81%) and oil refinery company (C6: 79%) was higher than that of the consortia obtained from wastewater treatment plant (WWTP) (C3: 67%, and C5: 73%), indicating that bacteria present in C1 and C6 were historically exposed to petroleum hydrocarbons. Moreover, it was intriguing that the consortium C4, also obtained from WWTP, exhibited high TPH degradation ability (77%). The NGS results revealed that two bacteria, Achromobacter sp. and Ochrobactrum sp., occupied more than 99% of the consortium C4, while no Pseudomonas sp. was found in C4, though this bacterium was observed in other consortia and is also known to be a potential candidate for TPH degradation as reported by previous studies. In addition, the consortium C4 showed high biosurfactant-producing ability among the studied consortia. To date, no study has reported the TPH degradation by the combination of Achromobacter sp. and Ochrobactrum sp.; therefore, the consortium C4 provided an excellent opportunity to study the interaction of and biosurfactant production by these two bacteria during TPH degradation.
24
Manusmare, Rutuja Pramod, and Tulasiprasad Sariki. "XTREAMS TOOLKIT UI DEVELOPMENT ON MICROSOFT WPF TECHNOLOGY." Asian Journal of Pharmaceutical and Clinical Research 10, no. 13 (April 1, 2017): 449. http://dx.doi.org/10.22159/ajpcr.2017.v10s1.20508.
Full textAbstract:
This project is a software application that runs with the station controller. When an error appears at the station controller it triggers a response flow checklist (RFC). An RFC is a troubleshooting procedure that helps you fix problems in manufacturing. A RFC is a series of instructions you define to help a manufacturing technician troubleshoot an equipment-related problem while processing. Trigger is a combination of micro-conditions. When a trigger occurs XTREAMS system automatically, it retrieves the RFC associated with that trigger. Authoring is the process of creating RFCs using the XTREAMS authoring tool. One can use the XTREAMS authoring tool to create RFC flow diagrams that the XTREAMS execution tool will display as step-by-step instructions for the RFC user. During running of a tool if the equipment is not ok, there could be multiple reasons or causes (C1, C2). These causes could be isolated by running a pre-defined checklist, that is, RFC. After the RFC and the triggers than are associated are approved using the XTREAMS Authoring Application the contents are send over to the various Intel Sites which are XTREAMS enabled. The toolkit that is provided with XTREAMS product provides one a unique capability to translate the received RFC contents to geo-specific languages so that the RFCs are relevant for the users of that particular geo. The aim here is the XTREAMS toolkit UI development on Microsoft Windows Presentation Foundation Technology so as to make it even more efficient and reliable, also which will set it free for unit tests to be performed appropriately. The MVVM framework has been followed for the purpose of development.
25
Indriani, Ulfah, and Nita Syahputri. "Aplikasi Rekapitulasi Suara Yang Diperoleh Calon Legislatif Pada Pemilihan Umum." Prosiding Seminar Nasional Riset Information Science (SENARIS) 1 (September 30, 2019): 88. http://dx.doi.org/10.30645/senaris.v1i0.11.
Full textAbstract:
General Election is a democratic party held every 5 (five) years. General elections are held to elect state officials from the President, Regional Head and Legislative Members. There are so many people who really want that position because of the huge income, luxurious facilities and high social level. Many people are willing to spend large amounts of money in order to be able to occupy these seats. This is because each candidate must get a large number of people's votes so that the candidates cannot work alone in order to gain votes. And if the election has arrived and the people have chosen, then the legislative candidates will try as soon as possible to find out whether they will be elected or not. The basis for the vote calculation is form C1 which is the result of manual recapitulation at the polling station (polling station). This form is very much even reaching thousands of files. The problem is that it is difficult and takes a long time if we have to count thousands of sheets and want to see the number of votes and voice mapping in the Electoral District (Electoral District) manually. Therefore, the researcher tried to make an application that could facilitate candidates for legislative candidates in carrying out vote counting. With this application it will be easy and fast in knowing the number of votes obtained. With this application, Legislative candidates will find out whether they can be elected or not. And the conclusion of this discussion is how a technology in the world of computers will greatly help candidates for the legislature to cut time and get detailed information about the votes obtained.
26
Legrand, M., C. Feniet-Saigne, and J. R. Petit. "Atmospheric Chemistry Changes Over The Last Climatic Cycle (180 000 Years) Inferred From The Vostok (Antarctica) Ice-Core Study." Annals of Glaciology 14 (1990): 344. http://dx.doi.org/10.3189/s0260305500009101.
Full textAbstract:
A 2 200 m-deep ice core from Vostok Station (East Antarctica) has been used for a comprehensive study of a series of ions (Na+ NH4+, K+, H+, Ca2+, Mg2+, C1−, F−, NO3− and SO42−) originating from impurities deposited over the whole last climatic cycle (180 000 years) as depicted from the isotopic composition of the ice.Concentration profiles confirm that both marine and terrestrial aerosol inputs were higher (up to five and 30 times the Holocene values respectively) during cold climatic conditions. Such large variations of marine and terrestrial aerosol concentrations measured in ice mainly reflect global (source strength and atmospheric transport efficiency) changes, and to a lesser extent local (deposition) changes.As opposed to these primary aerosols, secondary aerosols or gases (HNO3, HC1) exhibit more moderate variations. Finally, variations of other minor ions such as NH4+ provide information on the capacity of ammonia to neutralize the natural acidity of the past background atmosphere.Spectral analyses performed on our chemical profiles (200 samples) exhibit several specific periodicities (around 20 and 40 k year) close to the Earth's orbit tilt and precession frequencies which are discussed in terms of atmospheric response to climatic fluctuations.
27
Legrand, M., C. Feniet-Saigne, and J. R. Petit. "Atmospheric Chemistry Changes Over The Last Climatic Cycle (180 000 Years) Inferred From The Vostok (Antarctica) Ice-Core Study." Annals of Glaciology 14 (1990): 344. http://dx.doi.org/10.1017/s0260305500009101.
Full textAbstract:
A 2 200 m-deep ice core from Vostok Station (East Antarctica) has been used for a comprehensive study of a series of ions (Na+ NH4 +, K+, H+, Ca2+, Mg2+, C1−, F−, NO3 − and SO4 2−) originating from impurities deposited over the whole last climatic cycle (180 000 years) as depicted from the isotopic composition of the ice. Concentration profiles confirm that both marine and terrestrial aerosol inputs were higher (up to five and 30 times the Holocene values respectively) during cold climatic conditions. Such large variations of marine and terrestrial aerosol concentrations measured in ice mainly reflect global (source strength and atmospheric transport efficiency) changes, and to a lesser extent local (deposition) changes. As opposed to these primary aerosols, secondary aerosols or gases (HNO3, HC1) exhibit more moderate variations. Finally, variations of other minor ions such as NH4 + provide information on the capacity of ammonia to neutralize the natural acidity of the past background atmosphere. Spectral analyses performed on our chemical profiles (200 samples) exhibit several specific periodicities (around 20 and 40 k year) close to the Earth's orbit tilt and precession frequencies which are discussed in terms of atmospheric response to climatic fluctuations.
28
Cerino, Federica, Daniela Fornasaro, Martina Kralj, Michele Giani, and Marina Cabrini. "Phytoplankton temporal dynamics in the coastal waters of the north-eastern Adriatic Sea (Mediterranean Sea) from 2010 to 2017." Nature Conservation 34 (May 3, 2019): 343–72. http://dx.doi.org/10.3897/natureconservation.34.30720.
Full textAbstract:
Phytoplankton community structure was analysed from 2010 to 2017 at C1-LTER, the coastal Long-Term Ecological Research station located in the Gulf of Trieste, which is the northernmost part of the Mediterranean Sea. Phytoplankton abundance and relevant oceanographic parameters were measured monthly in order to describe the seasonal cycle and interannual variability of the main phytoplankton taxa (diatoms, dinoflagellates, coccolithophores and flagellates) and to analyse their relationship with environmental conditions. Overall, phytoplankton abundances showed a marked seasonal cycle characterised by a bloom in spring, with the peak in May. During the summer, phytoplankton abundances gradually decreased until September, then slightly increased again in October and reached their minima in winter. In general, the phytoplankton community was dominated by flagellates (generally <10 µm) and diatoms co-occurring in the spring bloom. In this period, diatoms were also represented by nano-sized species, gradually replaced by larger species in summer and autumn. Phytoplankton assemblages differed significantly between seasons (Pseudo-F = 9.59; p < 0.01) and temperature and salinity were the best predictor variables explaining the distribution of the multivariate data cloud. At the interannual scale, a strong decrease of the late-winter bloom was observed in recent years with the spring bloom being the main phytoplankton increase of the year.
29
Szatkowski, Artur, Mateusz Sokólski, Dariusz Załuski, and Krzysztof Józef Jankowski. "The Effects of Agronomic Management in Different Tillage Systems on the Fall Growth of Winter Oilseed Rape." Agriculture 13, no. 2 (February 13, 2023): 440. http://dx.doi.org/10.3390/agriculture13020440.
Full textAbstract:
The article presents the results of a three-year study, which analyzed agronomic management in the production of winter oilseed rape (WOSR) in different tillage systems. The effects of weed control and growth regulation in fall on the number of rosette leaves, epicotyl length, root collar diameter, taproot length, rosette weight, root weight, and the overwintering success of WOSR plants in different tillage systems were determined in the study. A field experiment was conducted at the University’s Agricultural Experiment Station in Bałcyny in north-eastern Poland in three growing seasons (2016/2017–2018/2019). The experiment had a mixed 21 × 32 factorial design with two replications, where one factor was evaluated at two levels, and two factors were evaluated at three levels. The experimental factors were: A—tillage: (A0) strip-till, (A1) low-till, and (A2) conventional tillage; B—weed control: (B0) pre-emergent, (B1) foliar, and (B2) sequential; C—growth regulation: (C0) none and (C1) in fall. Winter oilseed rape plants developed rosettes with the optimal morphometric parameters in the strip-till system. Sequential and foliar application of herbicides decreased the dry matter (DM) content of leaf rosettes (by approx. 18%). The application of the growth regulator in BBCH stages 14–15 increased taproot length by 3%.
30
Leifer, Ira, Christopher Melton, and Donald R. Blake. "Long-term atmospheric emissions for the Coal Oil Point natural marine hydrocarbon seep field, offshore California." Atmospheric Chemistry and Physics 21, no. 23 (December 3, 2021): 17607–29. http://dx.doi.org/10.5194/acp-21-17607-2021.
Full textAbstract:
Abstract. In this study, we present a novel approach for assessing nearshore seepage atmospheric emissions through modeling of air quality station data, specifically a Gaussian plume inversion model. A total of 3 decades of air quality station meteorology and total hydrocarbon concentration, THC, data were analyzed to study emissions from the Coal Oil Point marine seep field offshore California. THC in the seep field directions was significantly elevated and Gaussian with respect to wind direction, θ. An inversion model of the seep field, θ-resolved anomaly, THC′(θ)-derived atmospheric emissions is given. The model inversion is for the far field, which was satisfied by gridding the sonar seepage and treating each grid cell as a separate Gaussian plume. This assumption was validated by offshore in situ data that showed major seep area plumes were Gaussian. Plume total carbon, TC (TC = THC + carbon dioxide, CO2, + carbon monoxide), 18 % was CO2 and 82 % was THC; 85 % of THC was CH4. These compositions were similar to the seabed composition, demonstrating efficient vertical plume transport of dissolved seep gases. Air samples also measured atmospheric alkane plume composition. The inversion model used observed winds and derived the 3-decade-average (1990–2021) field-wide atmospheric emissions of 83 400 ± 12 000 m3 THC d−1 (27 Gg THC yr−1 based on 19.6 g mol−1 for THC). Based on a 50 : 50 air-to-seawater partitioning, this implies seabed emissions of 167 000 m3 THC d−1. Based on atmospheric plume composition, C1–C6 alkane emissions were 19, 1.3, 2.5, 2.2, 1.1, and 0.15 Gg yr−1, respectively. The spatially averaged CH4 emissions over the ∼ 6.3 km2 of 25 × 25 m2 bins with sonar values above noise were 5.7 µM m−2 s−1. The approach can be extended to derive emissions from other dispersed sources such as landfills, industrial sites, or terrestrial seepage if source locations are constrained spatially.
31
Monti-Birkenmeier, Marina, Tommaso Diociaiuti, and Serena Fonda Umani. "Long-term changes in abundance and diversity of tintinnids in the Gulf of Trieste (Northern Adriatic Sea)." Nature Conservation 34 (May 3, 2019): 373–95. http://dx.doi.org/10.3897/natureconservation.34.29841.
Full textAbstract:
Abundance and composition of the planktonic tintinnid ciliates were studied in the Gulf of Trieste (Northern Adriatic Sea, NE Mediterranean Sea) from July 1998 to July 2016. Tintinnids were collected biweekly-monthly from the LTER station C1 (200 m offshore, 17.5 m depth) at four depths (surface, 5 m, 10 m and 15 m). The maximum tintinnid abundance reached 4476 ind. L-1 at surface in February 2016. The tintinnid community comprised a maximum of 35 species and was dominated by the genera Stenosemella, Tintinnopsis, Codonellopsis, Salpingella and Eutintinnus. The most abundant species were Stenosemellanivalis, Tintinnopsisnana, Codonellopsisschabi, Salpingellarotundata and Eutintinnusapertus. We found a species-specific correlation with the abiotic factors considered, i.e., temperature and salinity. Temperature was positively correlated with S.rotundata and E.apertus and negatively with S.nivalis. Salinity was negatively correlated with the majority of the detected species. Agglutinated species presented winter maxima while hyaline species showed higher abundance in summer-autumn. Some key species were present over the whole period studied. Significant differences within the water column were not seen in the species composition, but were seen in the relative abundances of the same species at different depths. Stenosemellanivalis, S.ventricosa and Tintinnopsisberoidea can be considered as keystone species in the area and their possible loss can be seen as a signal of changes in the structure of the entire planktonic system.
32
Janhi, Kudzayi, Zimkhitha Matshaya, Cornelius Chiduza, and Lindah Muzangwa. "Clipping Forage Sorghum Twice and Nitrogen Topdressing Offer an Option for Dual-Purpose Use for Cover Cropping and Fodder in Mixed Crop/Livestock Farming Systems." Agronomy 10, no. 1 (December 20, 2019): 17. http://dx.doi.org/10.3390/agronomy10010017.
Full textAbstract:
Management practices that promote dual-purpose use of cover crops as forage and soil cover can encourage adoption in mixed smallholder (SH) farming systems. This study investigated the feasibility of dual-purpose use of forage sorghum (Sorghum bicolor x Sorghum bicolor var. sudanense) by testing the effects of clipping frequency and nitrogen (N) topdressing on the root biomass, crude protein (CP), acid detergent (ADF), and neutral detergent fiber (NDF) in the greenhouse and vegetative biomass on the experimental farm station. Four levels of clipping were tested: not clipped (C1), clipped once (C2), twice (C3), and thrice (C4). Nitrogen topdressing had two levels: with (N1) and without (N0) recommended supplementary N. Results show that absence of N topdressing significantly (p < 0.05) increased root biomass in C2, while increasing clipping frequency significantly (p < 0.001) decreased root biomass. During the growing period, N topdressing significantly (p < 0.001) increased CP content in C3 and C4 and NDF (p < 0.01) content in C4. At the termination stage, there was a significant interaction between clipping frequency and N topdressing on the biomass yield obtained in both 2016–2017 (p < 0.05) and 2017–2018 (p < 0.001), respectively. Clipping twice and N topdressing emerged as the best management practice for the dual-purpose of soil cover and livestock feed.
33
Bartosiewicz, Aleksandra. "Application of the AHP and PROMETHEE II methods to the evaluation of the competitiveness of Polish and Russian Baltic container terminals." Pomorstvo 34, no. 1 (June 30, 2020): 102–10. http://dx.doi.org/10.31217/p.34.1.12.
Full textAbstract:
The rapid growth in the volume of international container transport enforces the improvement of competitiveness in the entire transport chain, including maritime container terminals. Reports and scientific surveys on the Baltic Sea Region (BSR) tend to concentrate on annual results achieved by entire ports, largely ignoring the efficiency of individual terminals. The aim of the article is to fill this research gap and consequently examine the competitiveness of the most important maritime container terminals in Poland and their Russian competitors. To this end, selected Polish and Russian bases were examined with regard to a number of criteria, such as the length of the quay (c1), the number of RTG (c2) and STS (c3) cranes, the number of shortsea shipping connections (c4), the maximum depth at the quay (c5), the distance from motorways and expressways/national roads (c6) or the distance from the national railway station (c7). The above seven criteria were subsequently used to perform a strategic group mapping as well as AHP and PROMETHEE II multi-criteria rankings that enabled to specify those Baltic Sea container nodes which are in the area of strategic benefits for the analysed market sector. According to the results obtained, the Russian Petrolesport and the Polish DCT Gdańsk are the leaders of the market. This fact confirms their competitive advantage over other market players of the sector in question.
34
Lee, Sheng-Chieh, Ching-Yuan Lin, and Ying-Ji Chuang. "The Study of Alternative Fire Commanders’ Training Program during the COVID-19 Pandemic Situation in New Taipei City, Taiwan." International Journal of Environmental Research and Public Health 19, no. 11 (May 29, 2022): 6633. http://dx.doi.org/10.3390/ijerph19116633.
Full textAbstract:
In Taiwan, firefighters are responsible for transporting confirmed coronavirus cases to hospitals or epidemic prevention hotels. During the epidemic, in order to reduce the chance of cross-infection between the general public and the fire brigade, traditional collective mobilization training was limited. As a solution, this study combines a fire command course (C1) and a VR simulation for training fire station captains (VRST) and then applies the pre- and post-test evaluation approaches and the after-class questionnaire to summarize the learning effectiveness. The results show that, from a total of 244 captains that were trained, the after-training scores are significantly better when compared with the scores before training (p < 0.05, Cohen’s d > 0.8). Additionally, the post-test scores collected during the epidemic (n = 158) have no significant difference compared to the ones taken before the outbreak (2019, n = 86) in terms of sizing up, decision making, and safety management. The training results are still improving. The after-class questionnaire showed that most trainees believed that VRST helped to improve their confidence as incident commanders (ICs) (mean = 4.63, top box = 66.98%), with the novice and suburban groups exhibiting more significant improvements in command ability after the training. After the pandemic, VRST can continue as a regular training method for ICs. Because of the intervention of VRST, the differences in the command experience between different IC groups can be compensated for.
35
Tawah, C. L., D. A. Mbah, O. Messine, M. B. Enoh, and V. N. Tanya. "Crossbreeding cattle for dairy production in the tropics: effects of genetic and environmental factors on the performance of improved genotypes on the Cameroon highlands." Animal Science 69, no. 1 (August 1999): 59–67. http://dx.doi.org/10.1017/s1357729800051092.
Full textAbstract:
AbstractThree hundred and thirty (330) records from 363 lactations and 104 cows born between 1979 and 1991 from crossbreeding Holstein-Friesian (H) bulls with H, Ngaoundere Gudali (G) and Holstein × Gudali F1 (H1G1) cows, Montbeliard (M) bulls with G and Montbeliard × Gudali Fl (M1G1) cows and M1G1 bulls with M1G1 cows and raised in the Dairy Herd Unit of the Wakwa Animal and Veterinary Research Station in the sub-humid highlands of Cameroon were analysed to investigate the effects of genotype and environment on lactation and reproductive traits. Fixed effects of genotype season and year of calving parity and age of cow at calving were studied. Lactation milk yield (LMY), lactation length (LL), annualized milk production (AMP), calving interval (C1), dry period (DP) and age at first calving (AFC) were amongst the traits analysed. F1 crosses (H1G1, M1G1), backcrosses (¾ Holstein — ¼ Gudali; ¾ Montbeliard — ¼ Gudali) (H3G1, M3G1) and F2 crosses (MGF2) were compared. Results showed that H1G1 cows were proportionately 0·49 and 0·23 better than their corresponding backcross in LMY and AMP, respectively, while M1G1 cows were proportionately 0·12 and 0·24 inferior to M3G1 in these traits. M1G1 were proportionately superior to MGF2 in LMY (0·05), AMP (-0·04) and AFC (-0·14). M3G1 were superior (0·18 to 0·19) to MGF2 in LMY and AMP. H1G1 were consistently superior to M1G1 for most traits, suggesting that H1G1 may be better than M1G1 for dairy production.
36
Plourde, Stéphane, Pierre Joly, Jeffrey A. Runge, Bruno Zakardjian, and Julian J. Dodson. "Life cycle of Calanus finmarchicus in the lower St. Lawrence Estuary: the imprint of circulation and late timing of the spring phytoplankton bloom." Canadian Journal of Fisheries and Aquatic Sciences 58, no. 4 (April 1, 2001): 647–58. http://dx.doi.org/10.1139/f01-006.
Full textAbstract:
The life cycle of Calanus finmarchicus in the lower St. Lawrence estuary is described based on observations of female egg production rate, population stage abundance, and chlorophyll a biomass collected over 7 years (19911997) at a centrally located monitoring station. The mean seasonal pattern shows maximum abundance of females in May, but peak population egg production rate and naupliar (N3N6) abundance occur in early July just after onset of the late spring early summer phytoplankton bloom. The population stage structure is characterized by low summer abundance of early copepodite stages C1C3 and high stage C5 abundance in autumn. Between 1994 and 1997, there was important interannual variation in both timing (up to 1 month) and amplitude (five- to eight-fold) of population reproduction. Patterns of seasonal increase of C5 abundance in autumn suggest interannual variations of both timing and magnitude of deep upstream advection of this overwintering stage. Thus, the main features of C. finmarchicus population dynamics in the central lower St. Lawrence Estuary are (i) late reproduction resulting from food limitation prior to the onset of the summer phytoplankton bloom, (ii) probable export of early developmental stages during summer, and (iii) advection into the central lower St. Lawrence Estuary of overwintering stage C5 in autumn from downstream regions. These results support the hypothesis that circulation, mainly driven by discharge from the St. Lawrence River and its tributaries, is a key factor governing population dynamics of C. finmarchicus in this region.
37
Taofik, A., S. Bandiati, A. M. Maskoen, and M. Yusuf. "The effects of shearing and ascorbyl palmitate administration on physiological and blood metabolite profile of Padjadjaran sheep under heat exposure treatment." Journal of the Indonesian Tropical Animal Agriculture 46, no. 1 (January 18, 2021): 12–19. http://dx.doi.org/10.14710/jitaa.46.1.12-19.
Full textAbstract:
Ascorbyl-6-palmitate (AP) was a lipid-soluble synthetic ester of ascorbic acid that has been used as a preservation agent for foods and as an antioxidant in cosmetics and related products. This study aims to investigate the effect of shearing management and ascorbyl palmitate administration on physiological and hematological profiles in under heat load Padjadjaran sheep. The physiological profile involves respiration rate (RR), Pulse rate (PR), and rectal temperature (RT). Twenty rams Padjadjaran 1 – 1,5 year-old, weighing between 25 to 47.5 kg used from sheep breeding station Purwakarta, West Java - Indonesia. There are two treatments level in this research, (1). Shearing divide into two groups, unshearing (c0) and shearing (c1); (2). AP administration also divides two groups, not given (a0) and given 400 mg each head daily (a1). The whole treatments were a0c0, a0c1, a1c0 and a1c1. Heat exposure application was exposed to sunlight when the sheep exposed, the animal tethered by rope at the neck region. The sheep exposed to the sun when the ambient temperature at least 34oC, 180 minutes each day, three days a week. The result showed that AP administration and shearing have interaction effects on RR, PR and RT. The level of glucose and total protein is affected by interaction effect of AP administration and shearing, while cholesterol affected to shearing. The conclusion, supplementing AP and shearing application could reduce the negative impact of heat stress on physiological and blood metabolite profiles of Padjadjaran sheep. Although the wool of local breed has not economic value, the shearing is regularly needed.
38
Khadija Mokhliss and Mohammed Moncef. "Effects of environmental parameters on the nycthemeral migratory behaviour of copepod species in the Al Massira reservoir, Morocco." GSC Biological and Pharmaceutical Sciences 13, no. 3 (December 30, 2020): 162–73. http://dx.doi.org/10.30574/gscbps.2020.13.3.381.
Full textAbstract:
To improve our knowledge of nocturnal and diurnal migratory activity in copepods and in order to assess the effect of abiotic parameters on this activity, we have undertaken at the level of the Al Massira dam reservoir (dam located on the wadi Oum Erbia, in Morocco) the monitoring of the migration of the main species, during a 24-hour nycthemeral cycle. To be done; the measurement and sampling step is carried out every 4 hours; at different depths of the prospected station. The temperature, pH, dissolved oxygen and chlorophyll a measurements are taken. The systematic position of the main species of copepods and their density are determined. Most of the results obtained show that the main species of copepods inventoried within the reservoir are Neolovenula alluaudi and Acanthocyclops robustus. The nauplii of these two species present the maximum of densities at a depth of -5 m at 12 h; i.e. 70400 individual / m3 (ind / m3). The development stages of N. alluaudi are preferentially concentrated at -2 m at midnight, with 1900 ind / m3, while at 12 h and 16 h this density is less than 500 ind / m3. The maximum density for the stages of A. robustus is noted at midnight on the surface (at -5 m), i.e. 3400 ind / m3 for C1-2 and 3200 ind / m3 for stages C3-4-5 at -2 m at the same time. Therefore, the migratory behavior of these species seems to depend on the temperature, the concentration of dissolved oxygen and the variation of the food during the different phases of the cycle.
39
Chever, F., G. Sarthou, E. Bucciarelli, S. Blain, and A. R. Bowie. "An iron budget during the natural iron fertilisation experiment KEOPS (Kerguelen Islands, Southern Ocean)." Biogeosciences Discussions 6, no. 4 (July 10, 2009): 6803–37. http://dx.doi.org/10.5194/bgd-6-6803-2009.
Full textAbstract:
Abstract. Total dissolvable iron (TDFe) was measured in the water column above and in the surrounding of the Kerguelen Plateau (Indian sector of the Southern Ocean) during the KErguelen Ocean Plateau compared Study (KEOPS) cruise. TDFe concentrations ranged from 0.90 to 65.6 nmol L−1 above the plateau and from 0.34 to 2.23 nmol L−1 offshore of the plateau. Station C1 located south of the plateau, near Heard Island, exhibited very high values (329–770 nmol L−1). Apparent particulate iron (Feapp), calculated as the difference between the TDFe and the dissolved iron measured on board (DFe) represented 95±5% of the TDFe above the plateau, suggesting that particles and refractory colloids largely dominated the iron pool. This paper presents a budget of DFe and Feapp above the plateau. Lateral advection of water that had been in contact with the continental shelf of Heard Island seems to be the predominant source of Feapp and DFe above the plateau, with a supply of 9.7±2.3×106 and 8.3±6.7×103 mol d−1, respectively. The residence times of 1.7 and 48 days estimated for Feapp and DFe, respectively, indicate a rapid turnover in the surface water. A comparison between Feapp and total particulate iron (TPFe) suggests that the total dissolved fraction is mainly constituted of small refractory colloids. This fraction does not seem to be a potential source of iron to the phytoplankton in our study. Finally, when taking into account the lateral supply of dissolved iron, the seasonal carbon sequestration efficiency was estimated at 154 000 mol C (mol Fe)−1, which is 4-fold lower than the previously estimated value in this area but still 18-fold higher than the one estimated during the other study of a natural iron fertilisation experiment, CROZEX.
40
Mikhailova, Elena, Ray Bryant, John Galbraith, Yang Wang, Christopher Post, Olga Khokhlova, Mark Schlautman, Michael Cope, and Zhixiong Shen. "Pedogenic Carbonates and Radiocarbon Isotopes of Organic Carbon at Depth in the Russian Chernozem." Geosciences 8, no. 12 (December 5, 2018): 458. http://dx.doi.org/10.3390/geosciences8120458.
Full textAbstract:
Conversion of native grasslands to agricultural sites has resulted in remarkable changes in soil carbon at depth, but its impact on soil diagnostic horizons is unknown. This study was conducted to radiocarbon date the soil organic carbon (SOC) and quantify pedogenic carbonates in the Russian Chernozem at depth at three sites: a native grassland field (not cultivated for at least 300 years), an adjacent 50-year continuous fallow field in the V.V. Alekhin Central-Chernozem Biosphere State Reserve in the Kursk region of Russia (UNESCO—MAB Biosphere Reserve), and a cropland in the Experimental Station of the Kursk Institute of Agronomy and Soil Erosion Control. All sampled soils were classified as Fine-silty, mixed, frigid Pachic Hapludolls (Haplic Chernozem). The radiocarbon age (14C date, y BP) of SOC was highly variable: in the native grassland field, it varied from post-bomb (A-horizon) to 8011 ± 54 y BP (C-horizon); in the continuous fallow, it varied from 1569 ± 41 y BP (Ap-horizon) to 11,380 ± 180 y BP (C1-horizon); and in the cropland, it varied from 1055 ± 38 y BP (Ap-horizon) to 11,805 ± 68 y BP (Ck-horizon). Cultivation resulted in morphological/diagnostic changes in the soil profile (conversion of A to Ap; conversion of Bw to Bk horizon) over a 50-year period. These changes are supported by radiocarbon dating of SOC and pedogenic carbonate distribution within the soil profile. The proportion of pedogenic carbonates was highly variable: in the native grassland, it was 27% (C-horizon); in the continuous fallow, it varied from 53% (Bk1-horizon) to 72% (C2-horizon); and in the cropland, it varied from 85% (A-horizon) to 10% (Ck-horizon). The radiocarbon age differences with depth among the soils reflect changes in the soil carbon dynamics resulting from cultivation.
41
Chever, F., G. Sarthou, E. Bucciarelli, S. Blain, and A. R. Bowie. "An iron budget during the natural iron fertilisation experiment KEOPS (Kerguelen Islands, Southern Ocean)." Biogeosciences 7, no. 2 (February 2, 2010): 455–68. http://dx.doi.org/10.5194/bg-7-455-2010.
Full textAbstract:
Abstract. Total dissolvable iron (TDFe) was measured in the water column above and in the surrounding of the Kerguelen Plateau (Indian sector of the Southern Ocean) during the KErguelen Ocean Plateau compared Study (KEOPS) cruise. TDFe concentrations ranged from 0.90 to 65.6 nmol L−1 above the plateau and from 0.34 to 2.23 nmol L−1 offshore of the plateau. Station C1 located south of the plateau, near Heard Island, exhibited very high values (329–770 nmol L−1). Apparent particulate iron (Feapp), calculated as the difference between the TDFe and the dissolved iron measured on board (DFe) represented 95±5% of the TDFe above the plateau, suggesting that particles and refractory colloids largely dominated the iron pool. This paper presents a budget of DFe and Feapp above the plateau. Lateral advection of water that had been in contact with the continental shelf of Heard Island seems to be the predominant source of Feapp and DFe above the plateau, with a supply of 9.7±3.6×106 and 8.3±11.6×103 mol d−1, respectively. The residence times of 1.7 and 48 days estimated for Feapp and DFe respectively, indicate a rapid turnover in the surface water. A comparison between Feapp and total particulate iron (TPFe) suggests that the total dissolved fraction is mainly constituted of small refractory colloids. This fraction does not seem to be a potential source of iron to the phytoplankton in our study. Finally, when taking into account the lateral supply of dissolved iron, the seasonal carbon sequestration efficiency was estimated at 154 000 mol C (mol Fe)−1, which is 4-fold lower than the previously estimated value in this area but still 18-fold higher than the one estimated during the other study of a natural iron fertilisation experiment, CROZEX.
42
Ibrahim, Elisurya, Firmansyah Firmansyah, and Sumarni Panikkai. "The effectiveness of the entomopathogenic fungus Metarhizium anisopliae in controlling the green leaf hopper (Nephotettix virescens)." IOP Conference Series: Earth and Environmental Science 911, no. 1 (November 1, 2021): 012061. http://dx.doi.org/10.1088/1755-1315/911/1/012061.
Full textAbstract:
Abstract Green leafhopper (Nephotettix virescens) is one of the major pests on rice plants that can be a vector of tungro disease. Current pest control using insecticides by farmers is very worrying because in general it is not as recommended which can cause disturbances in the balance of the ecosystem, so it is necessary to use more environmentally friendly control alternatives, one of which is the use of entomopathogenic fungi that are targeted and do not cause the death of natural enemies. The potential of entomopathogenic fungi as biological control agents needs to be continuously developed to reduce the use of insecticides, one of which is the fungus Metarhizium anisopliae which is a type of entomopathogenic fungus that can kill insect pests. The purpose of this study was to determine the effect of several concentration and application method of M. anisopliae on the mortality of the green leafhopper (Nephotettix virescens). The study was conducted in the Laboratory and Greenhouse of the Tungro Disease Research Station starting from February - April 2020 using a two-factor factorial design in a completely randomized design (CRD). The first factor was the application method consisting of two treatments, namely the spray method (A1) and dip method (A2) while the second factor was the conidia density of Metarhizium anisopliae with 4 levels, namely 0 (C0) as control, conidia density 106 (C1) conidia density 107 (C2) conidia density 108(C3). Each treatment was repeated three times. The results showed that the concentration of 106 by dipping application showed the fastest average death time of green leafhopper imago, which occured after 4 days of application, while the fastest average death time of green leafhopper nymph was 3.67 days after application at a concentration of 10 7 by dipping applications.
43
Russo, R. S., Y. Zhou, K. B. Haase, O. W. Wingenter, E. K. Frinak, H. Mao, R. W. Talbot, and B. C. Sive. "Temporal variability, sources, and sinks of C<sub>1</sub>-C<sub>5</sub> alkyl nitrates in coastal New England." Atmospheric Chemistry and Physics 10, no. 4 (February 18, 2010): 1865–83. http://dx.doi.org/10.5194/acp-10-1865-2010.
Full textAbstract:
Abstract. Seven C1-C5 alkyl nitrates were measured both on the mainland and off the coast of New Hampshire using gas chromatographic techniques. Five separate data sets are presented to characterize the seasonal and diurnal trends and the major sources and loss processes of these compounds. Based on in situ measurements conducted at the University of New Hampshire (UNH) Atmospheric Observing Station at Thompson Farm (TF) located in southeast NH during winter (January–February) 2002, summer (June–August) 2002, summer (July–August) 2004, and on daily canister samples collected at midday from January 2004–February 2008, the median total alkyl nitrate mixing ratio (ΣRONO2) was 23–25 pptv in winter and 14–16 pptv in summer. During summers 2002 and 2004, MeONO2 decreased overnight and reached minimum hourly average mixing ratios in the early morning. Comparison with wind speed and trace gas trends suggested that dry deposition contributed to the early morning MeONO2 minimum which is a previously unaccounted for removal mechanism. The mean dry deposition rate and velocity of MeONO2 was estimated to be −0.5 nmol m−2 hr−1 and 0.13 cm s−1, respectively. Results from ambient air and surface seawater measurements made onboard the NOAA R/V Ronald H. Brown in the Gulf of Maine during the 2002 New England Air Quality Study and from ambient canister samples collected throughout the Great Bay estuary in August 2003 are also presented. Comparisons between the alkyl nitrate trends with anthropogenic and marine tracers suggest that a marine source of alkyl nitrates is not significant in coastal New England. Given the apparent prominence of a secondary source, comparisons between observed and predicted alkyl nitrate/parent hydrocarbon ratios were made which demonstrated that background mixing ratios have a continuous and prevalent influence on the alkyl nitrate distribution.
44
Sokólski, Mateusz, Dariusz Załuski, Artur Szatkowski, and Krzysztof Józef Jankowski. "Winter Oilseed Rape: Agronomic Management in Different Tillage Systems and Seed Quality." Agronomy 13, no. 2 (February 11, 2023): 524. http://dx.doi.org/10.3390/agronomy13020524.
Full textAbstract:
A three-year study was conducted to analyze agronomic management in the production of winter oilseed rape (WOSR) under different tillage systems. A field experiment was conducted at the University’s Agricultural Experiment Station in Bałcyny (north-eastern Poland), in three growing seasons (2016/2017, 2017/2018, and 2018/2019). The experiment had a 35–2 resolution III fractional factorial design with five fixed factors that were tested at three levels of intensity. The experimental factors were: A—tillage: (A0) strip-till, (A1) low-till, (A2) conventional tillage; B—weed control: (B0) pre-emergent, (B1) foliar, (B2) sequential; C—growth regulation: (C0) none, (C1) in fall, (C2)—in fall and spring; D—rate of nitrogen (N) fertilizer applied in spring: (D0) 160, (D1) 200, (D2) 240 kg ha–1; and E—rate of sulfur (S) fertilizer applied in spring: (E0) 0, (E1) 40, (E2) 80 kg ha–1. The crude fat (CF) content of WOSR seeds was highest in the strip-till system (498 g kg–1 dry matter, DM), and the total protein (TP) content of seeds was highest (196 g kg–1 DM) in low-till and conventional tillage systems. The content of neutral detergent fiber (NDF) was higher in seeds harvested from strip-till and low-till systems than from the conventional tillage system. The seeds of WOSR plants grown in the conventional tillage system accumulated more (by 0.4%) polyunsaturated fatty acids (PUFAs) and less (by 0.5–0.6%) monounsaturated fatty acids (MUFAs). An increase in the N rate from 160–200 to 240 kg ha–1 decreased the CF content (495 vs. 484 g kg–1 DM) and increased the TP content of seeds (191 vs. 199 g kg–1 DM). Sulfur fertilization induced a 34% increase in glucosinolate (GLS) concentrations in WOSR seeds, mainly by enhancing the biosynthesis of alkenyl GLS (by 39%).
45
Dash, Saroj Kumar, and Rajiv Sinha. "A Comprehensive Evaluation of Gridded L-, C-, and X-Band Microwave Soil Moisture Product over the CZO in the Central Ganga Plains, India." Remote Sensing 14, no. 7 (March 29, 2022): 1629. http://dx.doi.org/10.3390/rs14071629.
Full textAbstract:
Recent developments in passive microwave remote sensing have provided an effective tool for monitoring global soil moisture (SM) observations on a spatiotemporal basis, filling the gap of uneven in-situ measurement distribution. In this paper, four passive microwave SM products from three bands (L, C, and X) are evaluated using in-situ observations, over a dry–wet cycle agricultural (mostly paddy/wheat cycle crops) critical zone observatory (CZO) in the Central Ganga basin, India. The L-band and C/X-band information from Soil Moisture Active Passive (SMAP) Passive Enhanced Level 3 (SMAP-L3) and Advanced Microwave Scanning Radiometer 2 (AMSR2), respectively, was selected for the evaluation. The AMSR2 SM products used here were derived using the Land Parameter Retrieval Model (LPRM) algorithm. Spatially averaged observations from 20 in-situ distributed locations were initially calibrated with a single and continuous monitoring station to obtain long-term ground-based data. Furthermore, several statistical metrices along with the triple collocation (TC) error model were used to evaluate the overall accuracy and random error variance of the remote sensing products. The results indicated an overall superior performance of SMAP-L3 with a slight dry bias (−0.040 m3·m−3) and a correlation of 0.712 with in-situ observations. This also met the accuracy requirement (0.04 m3·m−3) during most seasons with a modest accuracy (0.059 m3·m−3) for the entire experimental period. Among the LPRM datasets, C1 and C2 products behaved similarly (R = 0.621) with a ubRMSE of 0.068 and 0.081, respectively. The X-band product showed a relatively poor performance compared to the other LPRM products. Seasonal performance analysis revealed a higher correlation for all the satellite SM products during monsoon season, indicating a strong seasonality of precipitation. The TC analysis indicated the lowest error variance (0.02 ± 0.003 m3·m−3) for the SMAP-L3. In the end, we introduced Spearman’s rank correlation to assess the dynamic response of SM observations to climatic and vegetation parameters.
46
Russo, R. S., Y. Zhou, K. B. Haase, O. W. Wingenter, E. K. Frinak, H. Mao, R. W. Talbot, and B. C. Sive. "Temporal variability, sources, and sinks of C<sub>1</sub>-C<sub>5</sub> alkyl nitrates in Coastal New England." Atmospheric Chemistry and Physics Discussions 9, no. 6 (November 3, 2009): 23371–418. http://dx.doi.org/10.5194/acpd-9-23371-2009.
Full textAbstract:
Abstract. Seven C1-C5 alkyl nitrates were measured both on the mainland and off the coast of New Hampshire using gas chromatographic techniques. Five separate data sets will be presented to characterize the seasonal and diurnal trends and the major sources and loss processes of these compounds. In situ measurements were conducted at the University of New Hampshire (UNH) Atmospheric Observing Station at Thompson Farm (TF) located in southeast NH during winter (January–February) and summer (June–August) 2002 and summer (July–August) 2004. The median (±standard deviation) total alkyl nitrate mixing ratio (ΣRONO2) was 25 (±7) in winter and 16 (±14) pptv in summer. Furthermore, daily canister samples collected at midday and later analyzed in the laboratory from January 2004–February 2008 gave median ΣRONO2 of 23 (±8) in winter and 14 (±10) pptv in summer. Alkyl nitrate mixing ratios increased throughout the morning and were highest in the afternoon reflecting mixing of remnant boundary layer air toward the surface and photochemical production during the day. During summers 2002 and 2004, MeONO2 decreased overnight and reached minimum hourly average mixing ratios in the early morning (05:00–07:00 LT). Comparison with wind speed and trace gas (i.e., hydrocarbons, ozone, carbon monoxide, total reactive nitrogen) trends suggested that dry deposition contributed to the early morning MeONO2 minimum which is a previously unaccounted for removal mechanism. The mean dry deposition rate and velocity of MeONO2 was estimated to be −0.5 nmol m−2 hr−1 and 0.13 cm s−1, respectively. Results from ambient air and surface seawater measurements made onboard the NOAA R/V Ronald H. Brown in the Gulf of Maine during the 2002 New England Air Quality Study and from ambient canister samples collected throughout the Great Bay estuary in August 2003 are also presented. Comparisons between the alkyl nitrate trends with anthropogenic and marine source fingerprints and tracers suggest that a marine source of alkyl nitrates is not significant in coastal New England. Given the apparent prominence of a secondary source, comparisons between observed and predicted alkyl nitrate/parent hydrocarbon ratios were made which demonstrated that background mixing ratios have a continuous and prevalent influence on the alkyl nitrate distribution.
47
Noni, Ghanim Bahlol, and Abd Ayat Hassan. "The Effect of Efficacy Local Isolates of Paenibacillus Bacteria on Available Soil Phosphorus and Growth of Cultivars Wheat (Triticum Aestivum L.)." IOP Conference Series: Earth and Environmental Science 923, no. 1 (November 1, 2021): 012073. http://dx.doi.org/10.1088/1755-1315/923/1/012073.
Full textAbstract:
Abstract A field experiment was carried out to study the effect of bio-inoculation with three local isolates of P. polymyxa and three Varieties of wheat on the growth and yield of the wheat plant (Triticum aestivum L). In the second agricultural research station affiliated to the College of Agriculture - University of Al-Muthanna, a field experiment was conducted in Al-Muthanna Governorate for the year 2020 in silty clay Loam soil texture. The experiment was designed in a randomized complete block method (RCBD) and with three replications. The experiment included two factors, where the first factor represents the local isolates of four levels, symbolized by P0-P1-P2-P3, and the second factor represents the three wheat varieties, Buhouth class 22, Iraq class, and Ibaa 99, which symbolized C1-C2-C3 respectively. The results showed the following: First: The P3 bio-pollination treatment achieved a significant increase in soil phosphorus, potassium, and nitrogen in the available part at the flowering stage, as the highest average was recorded for them (11.39 mg kg −1 soil - 1.4300%-1.4,000%), and the P2 treatment was superior for both soil potassium and plant height. And the dry weight, the highest average for them was recorded (157.8 mg kg −1 - 92.6 cm - 10.61 g plant −1). Second: As for the cultivars, they differed in most of the characteristics of the study. The Iraq cultivar excelled in soil phosphorous concentration with an average of (11.06 mg kg −1 soil), while Buhouth cultivar 22 was superior in soil potassium with an average of (158.02) mg kg −1 soil. Ibaa 99 had been recorded concentration nitrogen and potassium in plants with averages of (1.4208,1.3474%). Third: When the isolates overlapped with the cultivars, a discrepancy was observed. It gave Samawa isolate with Bohouth class 22 by recording the highest average in soil potassium concentration and plant height amounting to (166.7 mg kg −1 soil, 99.8 cm) respectively, while Al-Khidr isolate with Ibaa 99 cultivar in nitrogen and potassium concentration plant, where it reached (1.4567-1.4400)%, while the isolate without addition outperformed with the cultivar Iba 99 for dry weight, as it reached its highest average (11.40 gm plant −1). The isolate of vegetables also outperformed Iraq cultivar for phosphorous concentration in soil, as it recorded the highest average of (12.30) mg kg −1 soil.
48
Stearns, Rebecca L., Rachel K. Katch, Beth A. Parker, John F. Jardine, and Douglas J. Casa. "Impact Of Statin Use On Thermoregulatory Outcomes During Submaximal And Maximal Exercise." Medicine & Science in Sports & Exercise 52, no. 7S (July 2020): 533. http://dx.doi.org/10.1249/01.mss.0000679992.25862.c1.
Full text
49
Peev, Nikolay Angelov. "Understanding the Statics and Dynamics of the Subaxial Cervical Segments, Following C1-C2 Fusion." World Neurosurgery 87 (March 2016): 621–23. http://dx.doi.org/10.1016/j.wneu.2015.10.038.
Full text
50
Zvyaginceva, Alla, A. Samofalova, and V. Kul'neva. "INFORMATION AND ANALYTICAL CALCULATION AND MAPPING OF THE DISPERSION OF POLLUTANTS AT RAILWAY TANK STATIONS WITH PETROLEUM PRODUCTS." Modeling of systems and processes 13, no. 2 (September 21, 2020): 22–32. http://dx.doi.org/10.12737/2219-0767-2020-13-2-22-32.
Full textAbstract:
A basic list of polluting components released into the air zone of railway tank stations has been established, priority pollutants have been recorded: H2S, CH2O, C6H6, C7H8 and hydrocarbons in the sum: C1-C10 - in terms of C5H12, C2-C5 in terms of C5H10. Gross emissions are quantified for them. Maps have been developed for the distribution of pollutants in the event of destruction or explosion of tanks with petroleum products at a distance of up to 1000 meters in all directions of light for a specific residential area, broken down into sectors of 300, 650 and 995 meters with fixing at these points of surface concentration. It was found that the highest excess of the maximum permissible concentrations by 300 times was recorded at a distance of 300 meters from the source-Parking of the tank