scholarly journals Characterization of Rainwater Drainage Infrastructure in the City of Lomé (Togo, West Africa)

2017 ◽  
Vol 13 (30) ◽  
pp. 478
Author(s):  
Kodjovi Senanou Gbafa ◽  
Sonnou Tiem ◽  
Kouami Kokou
Keyword(s):  
Multiple Correspondence Analysis ◽  
Open Pit ◽  
Urban Flood ◽  
Retention Ponds ◽  
Catchment Areas ◽  
Storm Drainage ◽  
Retention Basin ◽  
Almost All ◽  
The City

Despite Togo government’s efforts to maintain and expand its storm drainage networks, urban flood disasters remain recurrent. Beyond Shallow zones occupation for construction and climatic causes, it is essential to circumscribe the determinants linked to infrastructure. Based on the inventory and characterization of rainwater drainage infrastructure, this study is a contribution to the reduction of flood risk in the city of Lome in Togo. Surveys were conducted on rainwater drainage works of the 172 paved roads in Lome. A sample of each network group is selected by considering the areas of recurring hazards and broadest catchment areas in the city for the evaluation of their structural and functional states according to the readapted VIZIR method. The relationship between these two states was computed using multiple correspondence analysis (MCA). This study reveals notable insufficiencies in rainwater drainage management in the city, expressed by the existence of roads built without drains, gutters without outlets, and open gutters and makeshift trenches built by the population. Functionally and structurally, almost all the structures are constructed of reinforced concrete. The most cracked are the mainly open pit (92.02%) works of the lagoon complex. The retention basin network includes 36 retention ponds 18 of which are interconnected, 11 drained by gravity and 4 by pumping. The latter are inherently hazardous insofar as pumping energy is not guaranteed. The MCA has shown that the network of piping related to the retention ponds are in similar conditions, and that generally, the closed gutters are not cracked while the open gutters are cracked.

Study of Painting Materials and Techniques in the 18th Century St.Athanasius Church in Moschopolis, Albania

2007 ◽  
Vol 1047 ◽  
Author(s):  
Eleni Pavlidou ◽  
N. Civici ◽  
E. Caushi ◽  
L. Anastasiou ◽  
T. Zorba ◽  
...  
Keyword(s):  
18Th Century ◽  
Orthodox Church ◽  
Wall Paintings ◽  
Cultural Center ◽  
Green Earth ◽  
Almost All ◽  
The City ◽  
The Church ◽  
Compositional Characterization

AbstractIn this paper are presented the studies of the paint materials and the technique used in 18th century wall paintings, originated from the orthodox church of St Athanasius, in the city of Maschopolis, a flourishing economical and cultural center, in Albania. The church was painted in 1745 by Konstantinos and Athanasios Zografi, and during the last years, restoration activities are being performed at the church. Samples that included plasters and pigments of different colors were collected from important points of the wall paintings. Additionally, as some parts of the wall-paintings were over-painted, the analysis was extended to the compositional characterization of these areas. The identification of the used materials was done by using complementary analytical methods such as Optical Microscopy, Fourier Transform Infrared spectroscopy (FTIR), Scanning Electron Microscopy (SEM-EDS) and X-ray fluorescence (TXRF).The presence of calcite in almost all the pigments is indicative for the use of the fresco technique at the studied areas, while the detection of gypsum and calcium oxalate, indicates an environmental degradation along with a biodegradation. Common pigments used in this area at 15-16th centuries, such as cinnabar, green earth, manganese oxide, carbon black and calcite were identified.

Possibility of using compensatory urban drainage techniques as leisure units to expand public areas into subdivisions

2021 ◽  
Vol 13 ◽  
Author(s):  
Geovana Geloni Parra ◽  
Bernardo Arantes do Nascimento Teixeira ◽  
Érico Masiero ◽  
Thais Borges Martins Rodrigues
Keyword(s):  
Social Interest ◽  
Urban Drainage ◽  
Rain Gardens ◽  
Public Areas ◽  
Retention Basin ◽  
Housing Complex ◽  
The City ◽  
Housing Estates ◽  
Drainage Technique

Abstract Many housing estates of social interest have not contributed to implementing leisure areas and reducing their environmental and urban quality. This paper aims to propose a leisure unit using a compensatory urban drainage technique in a housing complex of social interest in the city of São José do Rio Preto, São Paulo, Brazil. The characterization of the area, land use and occupation surveys, area sectorization, and catchment division were carried out. Afterwards, proposals for interventions based on surface runoff were presented using calculations of existing runoff and future scenarios. Results related to environmental and social gains for the area are discussed, as well as the possibility of implementing decentralized compensatory techniques. Moreover, 156 rain gardens and 3 ditches were proposed throughout the subdivisions, which enabled a gain of 989m² of contribution area to infiltrate the whole area, and the use of the retention basin as a leisure area. The total storage volume achieved with the sum of all the techniques implemented was approximately 3,000 cubic meters more than that projected for the existing retention basin.

scholarly journals Caracterização Gravimétrica de Resíduos Sólidos Urbanos da Cidade de Ereré/CE

2021 ◽  
Vol 14 (1) ◽  
pp. 172
Author(s):  
ANTONIO BATISTA QUEIROZ JÚNIOR ◽  
JOEL MEDEIROS BEZERRA ◽  
TALITA TASSIA DA COSTA ◽  
FRANCISCO SOARES ROQUE ◽  
ALANA TICIANE ALVES DO REGO ◽  
...  
Keyword(s):  
Solid Waste ◽  
Optimization Methods ◽  
Open Pit ◽  
Final Disposal ◽  
Product Consumption ◽  
Urban Solid Waste ◽  
Per Capita ◽  
Microsoft Office ◽  
The City

Os Resíduos Sólidos Urbanos (RSU) são um dos grandes problemas socioambientais da atualidade, em muitos casos, devido ao gerenciamento inadequado ou ineficiente nas etapas de coleta, transporte, destinação e disposição final, além das limitações quanto a promoção da educação ambiental. Diante disso, se faz necessária uma análise mais detalhada acerca da dinâmica de descarte destes resíduos para a adoção de metodologias que visem melhorar a qualidade no serviço deste eixo do saneamento. Desta forma, o objetivo desta pesquisa foi realizar a composição gravimétrica dos resíduos sólidos urbanos da cidade de Ereré/CE, por meio da análise quali-quantitativa desses materiais, no intuito de configurar os tipos e a quantidade de RSU gerado. O município de Ereré situado no estado do Ceará possui como dispositivo final de acomodação de seus RSU um aterro comum (vazadouro a céu aberto). Para tanto, se utilizou da metodologia de amostragem no local de descarte final, empregando a técnica de quarteamento na obtenção de massa específica. Os dados coletados foram analisados e tratados em planilha do software Microsoft Office Excel ®. Observou-se que a disposição de rejeitos é predominante, totalizando 28,23 % da amostra, seguida de matéria orgânica (20,75 %) e plásticos (19,04%). Além disso, os dados obtidos mediante cálculos matemáticos indicaram que a geração per capita é de 0,800 kg/hab.dia. Esses valores refletem na dinâmica de consumo de produtos e descarte de inservíveis presentes no município. Além disso, os dados obtidos foram de fundamental importância para se estabelecer métodos de otimização no gerenciamento de resíduos e para a promoção da educação ambiental. Gravimetric Characterization of Urban Solid Waste in the City of Ereré/CE A B S T R A C TUrban Solid Waste (USW) is one of the major social and environmental problems of the present time, in many cases, due to inadequate or inefficient management in the stages of collection, transport, destination and final disposal, in addition to environmental education. At that, a more detailed analysis about the dynamics of disposing of these residues is required for the adoption of methodologies that aim at improving the quality of service in this area of sanitation. The aim of this research was to perform the gravimetric composition of urban solid waste in the city of Ereré- CE, based on a qualitative and quantitative analysis of these materials, in order to configure the types and quantity of USW. The municipality of Ereré, located in the state of Ceará, has a standard landfill (open-pit dumping ground) as the end-unit for accommodating its USW. For this purpose, it was applied the sampling methodology at the local of final disposal, using the quartering technique to get a specific mass. The collected data were analyzed and processed in a Microsoft Office Excel ® spreadsheet. It was found that the waste disposal is prevalent, amounting 28.23% of the whole sample, followed by organic matter (20.75%) and plastics (19.04%). Moreover, mathematical calculations indicated that the per capita generation is 0.800 kg/hab/day. These values reflect the dynamics of product consumption and discarding of unusable materials present in the municipality. Furthermore, the data obtained were crucially important for establishing optimization methods in waste management and for the promotion of environmental education.Keywords: Gravimetry. Quartering. Solid waste.

Management and engineering solutions to improve stripping equipment efficiency in Chernogorksy open pit mine

2018 ◽  
pp. 36-48
Author(s):  
G. N. Shapovalenko ◽  
S. N. Radionov ◽  
V. V. Gorbunov ◽  
V. A. Khazhiev ◽  
V. Yu. Zalyadnov ◽  
...  
Keyword(s):  
Open Pit Mine ◽  
Open Pit ◽  
High Concentration ◽  
Open Pit Mines ◽  
Blasting Operation ◽  
Internal Dump ◽  
Mining Conditions ◽  
Mining Front ◽  
Comparison Of Equipment

Chernogosky open pit mine integrates truck-and-shovel system of mining with overburden rehandling to internal dump with a set of walking excavators for rehandling of overburden to mined-out area of the pit. It is possible to improve efficiency of stripping in the conditions of Chernogorsky OPM by reducing percentage of stripping with more expensive handling system. The relevant research and solutions to this effect are presented in this article. Comparative characterization of mining conditions and parameters of mining systems applied is given for open pit mines Chernogorsky, Turnui, Nazarovsky, Vostochno-Beisky and Izykh. The comparative analysis points at the need to account for difficulty of mining and process sites in comparison of equipment productivity. High concentration of mining machines, which is conditioned by narrow mining front and simultaneous operation of five faces, as well as blasting operation implemented every 1-2 days, are recognized as the main constraints of excavator capacity in mining with direct dumping in Chernogorsky open pit mine. The management and engineering solutions implemented in the mine and resulted in higher efficiency of draglines are described.

A Thorough Theoretical Exploration of Intriguing Characteristics of Cyclo[18]carbon: Geometry, Bonding Nature, Aromaticity, Weak Interaction, Reactivity, Excited States, Vibrations, Molecular Dynamics and Various Molecular Properties

2019 ◽  
Author(s):  
Tian Lu ◽  
Qinxue Chen ◽  
Zeyu Liu
Keyword(s):  
Molecular Dynamics ◽  
Excited States ◽  
Electronic Excitation ◽  
Ring Structure ◽  
Molecular Properties ◽  
Molecular Vibration ◽  
Full Characterization ◽  
Long Time ◽  
Almost All

Although cyclo[18]carbon has been theoretically and experimentally investigated since long time ago, only very recently it was prepared and directly observed by means of STM/AFM in condensed phase (Kaiser et al., <i>Science</i>, <b>365</b>, 1299 (2019)). The unique ring structure and dual 18-center π delocalization feature bring a variety of unusual characteristics and properties to the cyclo[18]carbon, which are quite worth to be explored. In this work, we present an extremely comprehensive and detailed investigation on almost all aspects of the cyclo[18]carbon, including (1) Geometric characteristics (2) Bonding nature (3) Electron delocalization and aromaticity (4) Intermolecular interaction (5) Reactivity (6) Electronic excitation and UV/Vis spectrum (7) Molecular vibration and IR/Raman spectrum (8) Molecular dynamics (9) Response to external field (10) Electron ionization, affinity and accompanied process (11) Various molecular properties. We believe that our full characterization of the cyclo[18]carbon will greatly deepen researchers' understanding of this system, and thereby help them to utilize it in practice and design its various valuable derivatives.

A Thorough Theoretical Exploration of Intriguing Characteristics of Cyclo[18]carbon: Geometry, Bonding Nature, Aromaticity, Weak Interaction, Reactivity, Excited States, Vibrations, Molecular Dynamics and Various Molecular Properties

2019 ◽  
Author(s):  
Tian Lu ◽  
Qinxue Chen ◽  
Zeyu Liu
Keyword(s):  
Molecular Dynamics ◽  
Excited States ◽  
Electronic Excitation ◽  
Ring Structure ◽  
Molecular Properties ◽  
Molecular Vibration ◽  
Full Characterization ◽  
Long Time ◽  
Almost All

Although cyclo[18]carbon has been theoretically and experimentally investigated since long time ago, only very recently it was prepared and directly observed by means of STM/AFM in condensed phase (Kaiser et al., <i>Science</i>, <b>365</b>, 1299 (2019)). The unique ring structure and dual 18-center π delocalization feature bring a variety of unusual characteristics and properties to the cyclo[18]carbon, which are quite worth to be explored. In this work, we present an extremely comprehensive and detailed investigation on almost all aspects of the cyclo[18]carbon, including (1) Geometric characteristics (2) Bonding nature (3) Electron delocalization and aromaticity (4) Intermolecular interaction (5) Reactivity (6) Electronic excitation and UV/Vis spectrum (7) Molecular vibration and IR/Raman spectrum (8) Molecular dynamics (9) Response to external field (10) Electron ionization, affinity and accompanied process (11) Various molecular properties. We believe that our full characterization of the cyclo[18]carbon will greatly deepen researchers' understanding of this system, and thereby help them to utilize it in practice and design its various valuable derivatives.

Physicochemical and bacteriological characterization of hospital effluents and their impact on the environment

2019 ◽  
Author(s):  
Chem Int
Keyword(s):  
Human Health ◽  
Fecal Coliforms ◽  
Chemical Pollution ◽  
Hospital Effluents ◽  
Biological Contaminants ◽  
Almost All ◽  
Direct Discharge ◽  
Significant Chemical

Liquid effluents discharged by hospitals may contain chemical and biological contaminants whose main source is the different substances used for the treatment of patients. This type of rejection can present a sanitary potentially dangerous risk for human health and can provoke a strong degradation of diverse environmental compartments mainly water and soils. The present study focuses on the quality of the liquid effluents of Hassani Abdelkader’s hospital of Sidi Bel-Abbes (West of Algeria). The results reveal a significant chemical pollution (COD: 879 mgO2/L, BOD5: 850 mgO2/L, NH4+ : 47.9 mg/l, NO2- : 4.2 mg/l, NO3- : 56.8 mg/l with respect to WHO standard of 90 mgO2/L, 30 mgO2/L, 0.5 mg/l, 1 mg/l and 1 mg/l respectively). However, these effluents are biodegradable since the ratio COD/BOD5 do not exceeded the value of 2 in almost all samples. The presence of pathogen germs is put into evidence such as pseudomonas, the clostridium, the staphylococcus, the fecal coliforms and fecal streptococcus. These results show that the direct discharge of these effluents constitutes a major threat to human health and the environment.

PENGARUH MOTIVASI, KREATIFITAS, DAN MENTALITAS TERHADAP PENDIDIKAN AKUNTANSI PADA PERGURUAN TINGGI SWASTA DI KOTA PADANG

2013 ◽  
Author(s):  
Lisa Fitriani Rahman
Keyword(s):  
Hypothesis Testing ◽  
Private Universities ◽  
Sampling Technique ◽  
Accounting Education ◽  
Accounting Students ◽  
Primary Data ◽  
Accounting Curriculum ◽  
Accounting Courses ◽  
Almost All ◽  
The City

Accounting education is taught in some private universities has impressed as stagnant knowledge, mechanical, and oriented material that causes a lot of students in general become saturated in the learning process. In Indonesia at several universities, almost all accounting courses little or no charge to enter the motivation, creativity, and mentality in the accounting curriculum-based motivation, creativity, and mentality can only he done well when formulated in a more complete firm of the curriculum. Therefore, this study examines the effect of motivation, creativity and mentality in accounting education to obtain empirical evidence. In this study using primary data obtained through questionnaires from a list of questions posed to accounting students in private universities in the city of Padang. The sample in this study was conducted with a purposive sampling technique where the sampling method was based on certain criteria, namely : involving student participants who majored in accounting class of 2010, 2011, and 2012 who had studied the sciences and overall accounting associated with accounting. Testing the hypothesis of this research is conducted with multiple regression analysis. The first hypothesis testing results found that motivation does not significantly influence accounting education in private universities Padang. The second hypothesis testing results found that creativity significantly influence accounting education in private universities Padang. The third hypothesis testing results found that significantly influence the mentality of accounting education in private universities Padang.

Sicily

2019 ◽  
pp. 536-552
Author(s):  
Salvatore de Vincenzo
Keyword(s):  
Fourth Century ◽  
Eighth Century ◽  
Advanced Degree ◽  
Characteristic Type ◽  
Almost All ◽  
The City

Thucydides reports that the Phoenicians were present throughout Sicily and traded with the Sicels. A tangible Phoenician presence in Sicily, as expressed by pottery, is attested only at the end of the eighth century bce. The earliest hypothetical Phoenician settlements of Solunt and Panormus are still almost unknown. This earliest phase is associated in particular with the city of Motya, where pottery and a few other finds testify to it. The Punic phase of the island is much clearer, with almost all indications coming from Motya and Selinus, which were not built over in Roman times. The Pfeilertempel, as emerged from Motya, could be regarded as the prototype for the Phoenician temple in Sicily. In turn, it is possible to recognize a characteristic type of temple of Punic Sicily, as particularly shown at Selinus, These shrines, as well as other elements of the Punic settlements like the houses, the fortifications, or the necropoleis, in particular from the fourth century bce onwards, are evidence of an advanced degree of Hellenization, framed within a Mediterranean koine.

scholarly journals Stoichiometry and compositional plasticity of the yeast nuclear pore complex revealed by quantitative fluorescence microscopy

2018 ◽  
Vol 115 (17) ◽  
pp. E3969-E3977 ◽  
Author(s):  
Sasikumar Rajoo ◽  
Pascal Vallotton ◽  
Evgeny Onischenko ◽  
Karsten Weis
Keyword(s):  
Nuclear Pore Complex ◽  
Yeast Cells ◽  
Nuclear Pore ◽  
Altered Expression ◽  
Copy Numbers ◽  
Quantitative Image ◽  
Multiple Copies ◽  
Almost All ◽  
High Degree

The nuclear pore complex (NPC) is an eightfold symmetrical channel providing selective transport of biomolecules across the nuclear envelope. Each NPC consists of ∼30 different nuclear pore proteins (Nups) all present in multiple copies per NPC. Significant progress has recently been made in the characterization of the vertebrate NPC structure. However, because of the estimated size differences between the vertebrate and yeast NPC, it has been unclear whether the NPC architecture is conserved between species. Here, we have developed a quantitative image analysis pipeline, termed nuclear rim intensity measurement (NuRIM), to precisely determine copy numbers for almost all Nups within native NPCs of budding yeast cells. Our analysis demonstrates that the majority of yeast Nups are present at most in 16 copies per NPC. This reveals a dramatic difference to the stoichiometry determined for the human NPC, suggesting that despite a high degree of individual Nup conservation, the yeast and human NPC architecture is significantly different. Furthermore, using NuRIM, we examined the effects of mutations on NPC stoichiometry. We demonstrate for two paralog pairs of key scaffold Nups, Nup170/Nup157 and Nup192/Nup188, that their altered expression leads to significant changes in the NPC stoichiometry inducing either voids in the NPC structure or substitution of one paralog by the other. Thus, our results not only provide accurate stoichiometry information for the intact yeast NPC but also reveal an intriguing compositional plasticity of the NPC architecture, which may explain how differences in NPC composition could arise in the course of evolution.

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