scholarly journals On the Hecuba gap

1996 ◽  
Vol 172 ◽  
pp. 177-182 ◽  
Author(s):  
S. Ferraz-Mello

An asteroid captured in the Hecuba gap (2/1 resonance with Jupiter) may remain there for a long time before escaping. However, the study of the diffusion of orbits in the gap indicates an escape timescale in the range 107–109 years. The short-period perturbations of Jupiter's orbit play a determinant role in the creation of the stochasticity responsible for the escape.

Author(s):  
Hironori Nakagami

Abstract There is currently an outbreak of respiratory disease caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). Coronavirus disease 2019 (COVID-19) is caused by infection with SARS-CoV-2. Individuals with COVID-19 have symptoms that are usually asymptomatic or mild in most initial cases. However, in some cases, moderate and severe symptoms have been observed with pneumonia. Many companies are developing COVID-19 vaccine candidates using different technologies that are classified into four groups (intact target viruses, proteins, viral vectors and nucleic acids). For rapid development, RNA vaccines and adenovirus vector vaccines have been urgently approved, and their injection has already started across the world. These types of vaccine technologies have been developed over more than 20 years using translational research for use against cancer or diseases caused by genetic disorders but the COVID-19 vaccines are the first licensed drugs to prevent infectious diseases using RNA vaccine technology. Although these vaccines are highly effective in preventing COVID-19 for a short period, safety and efficiency evaluations should be continuously monitored over a long time period. As the time of writing, more than 10 projects are now in phase 3 to evaluate the prevention of infection in double-blind studies. Hopefully, several projects may be approved to ensure high-efficiency and safe vaccines.


2017 ◽  
pp. 261-278
Author(s):  
Natalia Papenko

The article considers activity of particular representative of German socialistic movement – Ferdinand Lassalle. Historical figure of this person is connected with the history of German labor movement, the creation of first independent labor organization – the General German Workers’ Association (1863). Historical image of F. Lassalle was for the long time being brightened by historians one-sidedly, through ideological and personal difficulties with K. Marx and F. Engels. Unlike K.Marx, for whom a state and its structures where just superstructure, in other words – social and economic basis, for F.Lassale development of social formation is a natural historical process. K. Marx gambled on revolution, which had to destroy internal contradictions of the society, while F. Lassale gambled on parliament fighting, which, in his opinion, would discover the way to democratic transformations in society. F. Lassalle remains being bright, talented and discrepant person. Generally, his life and activity in the whole will have always been interesting for researchers. The whole of his life he was emphatically espousing the general, equal, straight right to vote, which, to his mind, would eliminate different problems of capitalist system and would promote building of democratic society. He was attracted by the idea of republic and democratic lawful state. F. Lassale had been studying problems of state and power, insisted on meaning of political institutions, role of human factor in history. He thought that constitution is a reflection of correlation of powers in fight for authority. That is why, by the means of agitation and popularization of democratic ideas he was trying to unite the labor movement to greater activity and to rally it. By the beginning of the 60th of XIX century he had been an adherent of democratic lawful state with the republican form of government. In the second half of the 60th he became a supporter of “social monarchy”. During his presidency at the General German Workers’ Association, the principles of authoritarianism were the dominating features of his activity. The General German Workers’ Association, which was created by him, afterwards facilitated the creation of German social democratic party.


2020 ◽  
Vol 5 (1) ◽  
pp. 58
Author(s):  
Imtihan Hanom ◽  
Rachel Aleyda Rozefy ◽  
Hilmiyani Taqiyyah Filasta

Work From Home (WFH) is a system chosen by the government in 2020 due to the spread of the Corona virus, with this system it is hoped that it can maintain social distance, namely reducing people's mobility, maintaining physical distance, and reducing crowds so that it is expected to reduce the risk of corona virus transmission. and employee safety. The WFH system has high flexibility, this is to support employee balance between work and life. The work system that changed to WFH in a short period of time made workers experience stressful conditions such as feelings of anxiety or worry for a long time, especially when they lived under the same roof with many people. In carrying out WFH, workers need a comfortable place to work to help focus on work. One of the things that play a role in creating a sense of comfort when working is the application of ergonomic rules. This study looks for any variables that can affect WFH activities and which variables most affect WFH activities. The application of ergonomics, especially macro ergonomics in WFH activities, is considered appropriate to be able to solve various problems in WFH activities. This study uses a descriptive qualitative method by conducting a study through distributing questionnaires to respondents who are doing WFH. From the results of the study, it was found that the comfort of workers in carrying out WFH activities is closely related to ergonomics in a residential house. The results of this study can be used as a reference for designing a suitable workspace for WFH activities, and as a reference for further research with a similar focus of study. Keyword: Interior, Ergonomic, Working From Home


2019 ◽  
Vol 5 (1) ◽  
Author(s):  
Boy Lumoindong ◽  
Golda Juliet Tulung ◽  
Christian G. Ranuntu

Nicknaming and its uses in daily communication by the people of Rumoong-Lansot villages are considered as both social and lingual phenomena that have existed since a very long time ago and unconsciously have become the internal part of daily interaction of the people. A well-maintained relationship among the individuals in the society is one of the major factors that endorsed them to address each other by using proper nicknames. No matter old or young people, male or female, wealthy or destitute, indigenous or non indigenous, are all unexceptional unrestrained for nicknaming and employing nicknames between one another.  The results of this research showed that term of nicknames employed by the people of Rumoong-Lansot villages concealed nearly the entire elements of internal linguistics and external linguistics. In term of types, all those nicknames that have been successfully collected and analyzed can be categorized into the following aspects: physical state, home and place of birth, occupation, particular moment, and every other feature that promotes the creation of the nicknames. Generally speaking, every single nickname employed by the people is conditioned to identify one specific member of the society in order to generate a clear and unimpeded sort of communication. Specifically, every single nickname is responsible to provide a distinguished portrayal of any peculiar individual in the society, and even more definite, about his most dominating distinctive characteristics.               


2021 ◽  
Vol 7 (1) ◽  
pp. 49-67
Author(s):  
Juni Ahyar ◽  
Zamzami Zainuddin ◽  
Indra Maulana ◽  
Rudi Kurniawan

This study aims to determine the management of digital archives at the Syar'iyah Court Office of East Aceh Regency, Indonesia, as well as finding obstacles encountered in their implementation. This research is a qualitative analysis where the subjects of this research were officers who managed digital archives at the Syar'iyah Court office. The data collection techniques employed were interviews, observations, and documentation. The results of this study indicate that the management of digital archives at the Syar'iyah Court Office has not been implemented optimally due to three conditions, namely: 1) The creation of digital archives is hampered due to frequent power outages in East Aceh and Sarana districts which are less supportive, and lack of resources. employees who understand digital archiving issues; 2) The process of borrowing archives carried out at the Syar'iyah Court Office has not been going well because it has not used archive lending procedures such as requesting archives, searching, retrieval of archives, recording, controlling, and storing again, to prevent loss of records; 3) Archive rediscovery still takes quite a long time, ranging from 20 to 30 minutes. The management of digital archives at the Office of the Syar'iyah Idi Court of East Aceh Regency should be improved by proposing additional archiving facilities, namely the latest model scan tool and additional employees who handle digital archive issues.


1951 ◽  
Vol 32 (5) ◽  
pp. 202-207 ◽  
Author(s):  
Emily Mitchell Wires

Whether a child is with us for long-time care or for a short period only, our success in meeting his needs will stem from the same essentials: a recognition and acceptance, on the part of both parents and agency, of (1) the need for placement, the reasons therefor, and the probable period of care; (2) the continuing meaning and importance of parents to their children and of children to their parents; (3) the problems attendant upon separation for all concerned. We also need to require of ourselves recognition and acceptance of the important role played by the foster parents, of the difficulties inherent therein, and of our obligation to provide the foster parents not only with casework help and support but to keep them currently aware of the developments and changes in agency practice and philosophy as these affect them.


2018 ◽  
Vol 73 ◽  
pp. 05013
Author(s):  
Oktiawan Wiharyanto ◽  
Hadiwidodo Mochtar ◽  
Bagus Priyambada Ika ◽  
Purwono Purwono

Technology to process food waste should be easy maintenance, fast, economical, affordable, environmentally friendly, and socially acceptable. Processing food waste according to the principle is biological decomposition. Biological processes usually take quite a long time (30 days). This study aims to accelerate the process of decomposition of food waste and produce a quality fertilizer products. Bulking agent (biofilm), bio activator (microorganism from cassava), and bio-drying technology are used to accelerate the decomposition process. The ratio of food waste and bulking agent is 7:3 (v/v). Mature product serves as a bulking agent and additive microorganisms. Additive microorganisms are also done by adding microorganism derived from cassava with a ratio of 10ml/500 g (Ml); 20 ml/500 g (M2); and 10ml/500 g of food waste (M3). The results showed the temperature of the food waste reached 50 ? at first. The addition of bulking agent and Additive microorganisms causes the thermophilic phase to occur early. This shows the thermophilic phase being achieved in a short period. Based on testing of compost maturity parameters, food waste has matured within 3 days. The C-Organic Concentration was 27.57%, N-total 1.98%, C/N ratio of 13.92, P-Total 0.23% and K-total 0.83%. In conclusion of this study, mature compost can be used as bulking agent with mature compost ratio and 7: 3 (v/v) bulking agent. Processing food waste is quite effective using a combination of bulking agent (mature compost), additive microorganisms and bio-drying technology.


1999 ◽  
Vol 172 ◽  
pp. 25-37
Author(s):  
S. Ferraz-Mello

AbstractThis paper reviews recent advances in several topics of resonant asteroidal dynamics as the role of resonances in the transportation of asteroids and asteroidal debris to the inner and outer solar system; the explanation of the contrast of a depleted 2/1 resonance (Hecuba gap) and a high-populated 3/2 resonance (Hilda group); the overall stochasticity created in the asteroid belt by the short-period perturbations of Jupiter’s orbit, with emphasis in the formation of significant three-period resonances, the chaotic behaviour of the outer asteroid belt, and the depletion of the Hecuba gap.


Author(s):  
Janka Beresecká ◽  
Veronika Svetlíková

According to the results from OECD countries, the position of the tourism sector in Slovakia has been unfavourable for a long time. Tourism in Slovakia is managed in a decentralized way, which is legally and financially supported in certain forms. Support is largely conditional on cooperation. Such an example is the support of the creation and activities of regional tourism organizations. In this paper, we will examine the economic significance and justification of cooperation among entities that are members of regional tourism organizations, by determining the relationship between the number of these organizations and the amount of revenue divided into four categories at the regional level. In this work we used multiple regression and correlation analysis. Based on their results, we identified the performance of companies according to the categories of achieved revenues. The results suggest that the most productive companies are companies with revenues ranging from 100000-500000 Euros per year. The paper also offers a framework of questions for further research related to sector governance, as well as an awareness of the importance and significance of cooperation.


2020 ◽  
Author(s):  
Nafia El-alaouy ◽  
Aicha Moumni ◽  
Badr-eddine Sebbar ◽  
Abdeljalil Gouzrou ◽  
Aberrahman Lahrouni

<p>Due to its arid to semi-arid climate, Morocco often faces significant intense rainfall periods that can generate flash floods and raging torrents causing serious damage in a very short period of time. In this context, these recent years, the watershed corresponding to the SAKIA EL HAMRA wadi has known devastating downpours and excessive heavy rains that caused severe floods in Laayoune city and its regions.</p><p>The watershed of Sakia El Hamra covers an area of 82000 km<sup>2</sup>, that drains to Sakia El Hamra wadi, a stream of about 447 km long, crosses the basin in its northern part in the East-to-West direction, to discharge into the Atlantic Ocean at the outlet called Foum El Oued. This zone often experiences dangerous torrents of water and violent flash floods, specifically in the northern part of Laayoune city. For example, a flash flood has occurred at the end of October 2016. The peak flow was far in excess of the average (3000 m<sup>3</sup>/s against 410m<sup>3</sup>/s). This river flood, lasted for about 10 h, caused damage to the infrastructure and destruction of agricultural lands near Foum El Oued.</p><p>The objective of this study is to investigate, through modelling, the hydrological regime of SAKIA EL HAMRA watershed to prevent the floods in the future and improve warning systems. The hydrological parameters of the watershed were determined by WMS software, namely: zone extent, perimeter, slope, basin’s average elevation, Gravelius compactness index, Horton shape index, average altitude, drainage density and concentration time.</p><p>Flood flow return was simulated using the Log-normal distribution, using a long time-series of flow and maximum daily and annual precipitation data, recorded between 1985 and 2016, at the Airport station in Laayoune city. The results showed that during flash floods with known flows, water level can reach up to 13 meters, with high flow velocities flooding hundreds of hectares of surrounding plains at the northern part of the city of Laayoune and agricultural lands near Foum El Oued.</p>


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