Does Historical VIX Term Structure Contain Valuable Information for Predicting VIX Futures?

We suggest that the term structure of VIX futures shows a clear pattern of dependence on the current level of VIX index. At the low levels of VIX (below 20), the term structure is highly upward sloping, while at the high VIX levels (over 30) it is strongly downward sloping. We use these features to predict future VIX futures prices more precisely. We begin by introducing some quantitative measures of volatility term structure (VTS) and volatility risk premium (VRP). We use them further to estimate the distance between the actual value and the fair (model) value of the VTS. We find that this distance has significant predictive power for volatility futures and index futures and we use this feature to design simple strategies to invest in VIX futures

Use of somatic cell count as an indicator of colostrum quality

The impact of cow mammary gland diseases on the quality of colostrum is not conclusively defined; research results are conflicting. However, it is widely believed that mastitis lowers the level of immunoglobulins and the quality of the colostrum produced. Therefore, the aim of this study was to determine the influence of somatic cell counts (SCC) on the colostrum immuno-stimulating and chemical components. The experiment was conducted on an experimental organic dairy farm in which a herd of approximately 250 cows was kept in a freestall housing system, with the average performance exceeding 6,000 kg of milk per lactation. Colostrum and milk samples were taken individually from each cow seven times during the experiment: from the first to second day after calving–twice per day, and from the third to fifth day after calving–once per day. Therefore, after preliminary analyses, the cows were divided into two groups based on the cytological quality of their colostrum at the first collection: 1. SCC �400,000 cells/ml (good quality colostrum; GCC– 18 cows), 2. SCC � 400,000 cells/ml (low quality colostrum; LCC– 22 cows). The study found almost double the concentration of immunoglobulins and essential fatty acids in first milking colostrum in the GCC group than in colostrum from the LCC group. In addition, an increase in the concentration of lysozyme in first milking colostrum was associated with a decrease in the concentration of immunoglobulins. In addition, the increase in the level of lysozyme was associated with a decrease in the concentration of immunoglobulins. In conclusion, the SCC of first milking colostrum can be used as an indicator of colostrum quality

Age of cows, as a factor shaping the level of immunostimulating properties of colostrum

A characteristic feature of the organic system of production is the lower productivity of cows. The aim of the study was to determine the effect of cow age and collecting number on the level of immunostimulating colostrum components in an organic farm. From the basic herd specializing in organic milk production, 40 cows of the Polish Holstein-Friesian Black and White breed were selected: 10 primiparous, 10 cows in 2nd lactation, 10 cows in 4th lactation and 10 cows in 5th lactation. The colostrum samples were collected according to the following scheme: the first one maximum of two hours after calving, the second on the same day and the third and fourth on the following day. For three consecutive days samples were taken once a day (7 colostrum samples from each cow). Statistically significant differences in the level of bioactive components of colostrum with immunostimulating properties has been shown due to the time of intake from calving and significant differences in the level of these components due to the age of cows. Multiparous cows synthetized colostrum with a higher content of total protein, casein and non-fat dry matter than the primiparous. Variability of the immunoglobulin content of colostrum obtained in 1st and in the 2nd collecting after calving was higher in multiparous cows than in primiparous cows. Furthermore, it has been shown that there was a clear correlation between the quality of colostrum and the age of cows. In conclusion, a high impact of the interaction of age of cows x collecting number on the development of colostrum stimulating ingredients in the organic production system has been demonstrated

health promotion for the aging workforce in poland

Objectives The aging of the workforce is an issue that calls for concrete measures to promote the health of older workers. This study reports on the results of the European "ProHealth65+" research project interventions conducted in Poland in relation to workplace health promotion for older workers (WHPOW) and the institutions involved in these programs. Material and Methods A three-stage search of peer-reviewed and grey literature on the WHPOW in Poland. Results A total of 59 WHPOW programs were retrieved in Poland in the observation period (2000–2015). Most of these aimed at improving the Qualification and Training or at the Work Climate and attitudes toward older workers. The promotion, organization, and funding of these activities were carried out mainly by supra-national and governmental bodies, enterprises and employers, and educational and trainee institutions. Conclusions Although there is great commitment to the medical surveillance of workers on the part of the Polish occupational health service, our search detected a relatively low number of the WHPOW initiatives. Greater efforts should be made to introduce strategies for addressing aging of the workforce. Int J Occup Med Environ Health 2018;31(6):753–76

Interaction between the level of immunoglobulins and number of somatic cells as a factor shaping the immunomodulating properties of colostrum

The aim of this study was to investigate the association between immunoglobulins and SCC as a factor in shaping the content of the immunostimulatory components of colostrum. Seventy-eight multiparous Polish Holstein–Friesian cows were selected for the experiment. Colostrum samples were collected immediately after calving (up to a max. of 2 h). The cows were divided into groups according to the following levels: Immunoglobulins (IG class)—(IG1) over 50 g/L, (IG2) up to 50 g/L; SCC class—(SCC1) up to 400 000/ml, (SCC2) 400–800 000/ml, (SCC3) over 800 000/ml. Colostrum assigned to the IG1 SCC1 group had a statistically significant higher (p ≤ 0.01) concentration of both whey proteins and fatty acids compared to the IG1 SCC2 and SCC3 groups. The concentration of IgG, IgM, and IgA was shown to be higher in IG1 SCC1 than IG2 SCC3 by 226%, 149%, and 115%, respectively. The concentration of lactoferrin was shown to be higher in IG1 SCC1 than IG2 SCC3 by 149%. The determination of colostrum quality based on the concentration of immunoglobulins in the colostrum may not be sufficient because serum IgG concentrations at birth show a linear increase relative to colostrum SCC. A breakdown of colostrum into quality classes, taking into account the level of SCC, should therefore be introduced

Job satisfaction of occupational medicine nurses in Poland

Objectives: The study aimed at assessment of the Polish occupational medicine service system after over ten years of functioning in the current shape, made by occupational nurses. The article focuses on the job satisfaction level among Polish occupational medicine nurses. Materials and Methods: The survey was performed among 600 randomly selected occupational medicine nurses, registered in the regional occupational medicine centers. A questionnaire, designed by the research team, containing several questions concerning different aspects of OMS system assessment, including a part dedicated to job satisfaction assessment, was sent to the selected occupational nurses. The response rate was 33.3% (200 questionnaires). Results: The survey shows a relatively high satisfaction level in case of five out of eleven investigated job aspects, and a very low satisfaction level in case of two of them (“Possibility of professional promotion”, “Salary”). 26% of the OMS nurses had considered going abroad to work as a nurse in the general health care system, and 17% in the OHS system. Almost 25% of them would not choose a profession of an occupational nurse once again, including 10% who would not choose a nurse job at all. There is a statistically significant correlation between the general job satisfaction and satisfaction with other aspects of nursing work. A strong correlation was observed in case of “Scope of performed tasks” and “Cooperation with employers (clients of the occupational medicine service units)”. There is a statistically significant correlation of average strength between the decision concerning choosing an occupational nurse job in case of taking a decision on professional carrier once again and “General job satisfaction”. Conclusion: Polish occupational nurses are satisfied with their job, however only 26% are fully satisfied. In their work there is place for improvement. The areas which definitely need attention and improvement are “Possibility of professional promotion” and “Salary”. Improvements in cooperation between occupational nurses and physicians can make it close to the best practice

Cooperation within physician–nurse team in occupational medicine service in Poland – Knowledge about professional activities performed by the team-partner

Background: The goal of the study has been to learn about physicians’ and nurses’ awareness of the professional activities that are being performed by their colleague in the physician–nurse team. Material and Methods: Postal questionnaires were sent out to occupational physicians and nurses in Poland. The analysis includes responses from 232 pairs of physician–nurse teams. Results: The knowledge among occupational professionals about tasks performed by their colleagues in the physician–nurse team seems to be poor. Respondents were asked about who performs tasks from each of 21 groups mentioned in the Occupational Medicine Service Act. In the case of only 3 out of 21 groups of tasks, the rate of non-consistence in answers was lower than 30%. A specified number of professionals performed their tasks on the individual basis. Although in many cases their team colleagues knew about those activities, there was a major proportion of those who had no awareness of such actions. Conclusions: Polish occupational physicians and nurses perform a variety of tasks. Occupational nurses, besides medical role, also play important organizational roles in their units. The cooperation between the two professional groups is, however, slightly disturbed by the deficits in communication. This issue needs to be improved for the betterment of operations within the whole system. Med Pr 2015;66(5):625–63

Health promotion and prevention in occupational health systems in Europe

Objectives In the contemporary Western culture, working population health issues, stressed in various publications, have been perceived as a crucial part of public health. To deal with occupational health issues properly, occupational health services (OHS), aiming at the protection of the workers’ health, are organized in many countries. The survey was to find the differences in occupational health systems that the European Economic Area countries use in order to execute prophylactic activities focused on diseases of affluence and how the OHS are used for health promotion actions. Material and Methods The survey was conducted with the use of an on-line expert questionnaire. No deep statistical analysis was performed as for the designed aims of the study simple statistics were sufficient. Results All the reviewed countries have organized OHS. The funding mechanisms are based mainly on the financial involvement of employers. In the majority of countries, the main goal of the OHS is certification of the ability to work. Workplace surveillance aiming at the occupational risk assessment and health promotion activities that focus on work-related and/or occupational diseases are the most popular services provided within national systems. Conclusions Occupational health professionals are well placed to perform actions directed at health promotion and prophylactics of a wide range of diseases – not only occupational/work-related, but also non-communicable, particularly life-style-related diseases of affluence. The engagement of the occupational medical services (OMS) in prevention of the non-work-related health issues would be valuable. However, it would be inevitable for employers to finance a wider range of services to a greater extent. Int J Occup Med Environ Health. 2019;32(3):353–6

Organic Milk Production and Dairy Farming Constraints and Prospects under the Laws of the European Union

In recent years, there has been rapid development in organic farming. When choosing organic livestock products, consumers are guided by the conviction that animals are provided with the highest welfare standards and access to pasture. The purpose of this article was to trace the principles of organic farming prevailing in the EU with regard to milk production and cattle breeding. The principles of organic production are universal and their application is not limited to certified farms. Organic certification is intended to assure the consumer of the quality and method of production. Due to additional requirements imposed by law, organic cows are usually kept in better welfare conditions compared to conventional cattle, but this is not the rule. The altered taste and texture of organic milk and its products compared to conventional products mainly depends on the presence of pasture greens in the cows’ diet. Therefore, milk from conventionally kept, pasture-grazed cows may have similar characteristics and composition. Organic farms tend to have lower milk yields compared to conventional farms due to the lower consumption of concentrate feed. In the future, it is expected that the proportion of land that is unsuitable for the production of crops for human consumption will increasingly be used for cow grazing