Experiments of partial cooking of the same quantity of polyethylene were carried out at fixed temperature and pressure in different solvents consisting of a mixture of vegetable oils. The final product obtained from certain oil mixtures showed three phases: a relatively fluid polymer-poor gelatinous phase, a polymer-rich gelatinous phase, and a solid phase consisted of polymeric lumps. The final product obtained from other oil mixtures did not show a solid phase of polymeric lumps, but only the polymer-rich gelatinous phase and the relatively fluid polymer-poor gelatinous phase. The polymer fraction effectively mixed with the solvent during the experiments of partial cooking was measured by the amount of the relatively fluid polymer-poor gelatinous phase. The amount of the collected relatively fluid polymer-poor gelatinous phase was studied in accordance with the Flory-Higgins theory as a function of the volume fraction of the oil mixture components in the initial solvent. This study shows that the behavior of the Flory parameter and that of the solubility parameter of the solvent can be described by the amount of the relatively fluid polymer-poor gelatinous phase. This study also suggests a method for obtaining an optimal two-component solvent that can mix with a thermoplastic polymer as polyethylene. The optimal solvent is the one that minimizes the amount of the relatively fluid polymer-poor gelatinous phase.
In a growing number of countries, there are complaints about the level (mastery of knowledge) of the pupils, particularly primary or secondary education. This situation is further exacerbated in DR Congo. This article is intended to be a barometer, based on a strict statistical procedure, the so-called “disaster of DR Congo’s education system.” The results of the statistical test must be a concern to every DR Congolese patriot on the future of his country, which has entered its final throes. Experts in science education must address a series of questions: the aims of education, the education curriculum, the language of instruction, the evaluation system, etc. We have to wonder whether the education in DR Congo is not sabotaged on purpose, to stupefy then to crush the people of Congo!
Diarrhoeal diseases are among the most common and widespread diseases in the world. The overall objective of this study is to determine the risk factors for diarrhoeal diseases in order to contribute to the implementation of sustainable control measures in the Kailo health zone.
We conducted an analytical cross-sectional study in two health areas in Katako and Nyoka. Approximately 400 households with at least one child under 5 years of age were selected by 3-stage probability sampling. The study period was from January to December 2017, and a survey sheet was used to collect the data. The analyses were performed using the EPI DATA 3.1 software and exported to the SPSS 23 software.
The lack of handwashing facilities in households, (Odd Ratio=0.425 p=0.005 IC= 0.23; 0.78), ignorance of the causes of diarrhoea (Odd Ratio= 0.537 IC=0.33 ;0.87 p=0.016) and poor attitude towards the child's diarrhoea (Odd Ratio=0.514 CI at 95%= 0.298; 0.886) p=0.017).
The study showed that the occurrence of diarrhoeal diseases in this health zone is significantly associated with the use of surface water as the main source of drinking water (OR=2.186 p=0.042), the lack of handwashing facilities in households (OR=0.425 p=0.005), ignorance of the causes of diarrhoea (OR= 0.537 p=0.016) and poor attitude towards children's diarrhoea (OR=0.514 p=0.017).
In several reform projects, there is a concern to introduce into the curriculum different dimensions of education that address the main contemporary socio-environmental issues: environmental education (EE) is often formally legitimized, such as education for human rights, peace, democracy, intercultural relations, health education, development education and education for international solidarity.
From the astronaut's perspective, the entire Earth becomes a management object: only oneThe new world order will be able to save the Earth and lay the foundations for the sustainability of the Development. The global or global or international perspectives that are proposed for contemporary education are part of an astronaut's ethics. This is why you will agree with us that the research carried out in the schools of the city of Kindu produced a very marked Nihilism during the respondents, because out of Sixty-four schools visited that do the one hundred percent of our investigations, it follows that 18 schools have an average knowledge of environmental concepts of about 35%.
This article is devoted to the analysis of the behavior of the suspension springs of the locomotives U22C of the National Railway Company of Congo (SNCC in abbreviation) which springs undergo repeated breaks, reducing the availability of the machines. Operation and causing a lot of purchase and maintenance cost as a replacement.
Indeed, the locomotives U22C which is discussed in this article have total weight of; that is 18.3 tons per axle and 4575kg per wheel. Since their start-up, these locomotives know a lot of breaks of suspension springs and our first reflex was to check the behavior of the springs on the strength of materials to ensure their effectiveness before considering other tracks of research of the causes of the breaks.
Both the theoretical calculations and the press tests have shown that the static load of these springs cannot cause these breaks, the stresses and the weakening of these springs under this load being lower than the admissible limit.
This being the case, other avenues of research that are not part of this article will have to be considered in order to find the real cause and remedy of them quickly.
As for the agronomic characterization of local and foreign varieties, the average plant sizes varied according to the forms and varieties. Round Violet, elongated Red, elongated Violet and flat Violet were characterized by the biggest average sizes (56.03-60.68 cm) within local varieties. Round Red genotype presented the smallest size (36.80 cm). For the foreign varieties, Makis and Opal presented bigger sizes than Marmande (44.00 cm), Roma (39.73 cm) and Carotina (38.93 cm).
The number of flowers produced, was numerically very high (59.33 to 62.58 flowers) for flat Violet genotypes, round Violet, and flat Red for the local varieties, and Makis (61.33 to 61.46) and Opal (37.33 to 41.86) for foreign varieties. In this variety, Marmande (28.13), Roma (29.66) and Carotina (12.06) produced less flowers. Local varieties produced more fruits (18.26 to 32.60) than the foreign varieties (5.48 to 12.45). The fruits of the foreign varieties (25.23 g to 45.88 g) weighed more than the ones of the local varieties (9.47 g to 17.35 g).
Over its history, the Congolese Higher and University Education has gone through several phases of reform. Despite this, the crisis in which the higher and university education sector is stuck continues to threaten dangerously the future of the nation because of a new fact and little known to the general public, the politicization of public universities of countryside and the instrumentalization of justice in an attempt to prevent the heads of establishments from fully playing their police role of the institution. Ultimately, excellence gave way to mediocrity, the ESU becoming a real place of the upper mafia, with as a consequence the distortion of the Congolese youth by so called professors without any doctoral degree of which the thesis was defended publicly and obtained legally. Faced with these “new plagues”, the challenges to be met are tremendous. Thus, the current study poses the diagnosis and retraces the path to be followed by a member of the scientific and academic staff respectively, within a normative and regulatory framework of Higher and University Education in the Democratic Republic of the Congo. On the other side, we show how some politicians got involved in the academic management of the University of Gbado-Lite (considered here as a model system) to make it a private asset at the expense of quality assurance. Thus, the use of the "Congolese diaspora" in order to strengthen research and teaching capacities of our universities has given rise to organized and maintained cheating on a large scale.
This research explores the performances of elementary school fourth form teachers in mathematics, according to the content of the national program of elementary school in the Democratic Republic of Congo. Exactly it is about the knowledges in mathematics and the knowledges in methods and process for a correct transmission of the matter to pupils. The results show that the global achievement has reached the level of 49.48%. 28 teachers by 202, to say 13.9%, have reached the success level fixed at 70%, and 174 teachers by 202, to say 86.1 %, haven’t reached that threshold. The results show also that the global achievement is at level of 14.60% in methods and process. 8 teachers only by 202, to say 4 %, have reached the threshold of 70%.
This study shows at last that the age is the best predictor of teachers’ performances in knowledges of mathematics. It is followed by the professional experience and the school network. The oldness in the fourth form takes the final position.
Throughout “l’Ecart”, a novel by Yves Valentin Mudimbe and “Les étoiles écrasées” by Pius Ngandu Nkashama the problem which is pointed concerns the oral traces in the modern negro-African novel. The comparative approach, as a basis of our investigation depicts therefore, by a socio-poetic aspect, the different scriptural elements that make the loady of the question understudy. It goes from what is oral in order to establish a poetic form of oral literature in the body of our research.
The present research is conducted in secondary schools from Kabare centre and it focuses on factors of teaching efficiency in the schools of our concerned. It aims at analyzing the effects of those factors on the findings of secondary schools pupil’s results in the state assessment in the year 2013-2014. We have applied the analytico-descriptive, approach, analytical approach for data collection and the quotas techniques that allowed to design a stratified sample of about 89 teachers. The index of percentage and the overage to analyses and interpret the findings have been applied for this research. The above statements proved that those schools are in a colossal need of qualified and skilled teachers to overcome any weakness on their disposals.