| 1. |
- Chen, Yun, 1966, et al.
(författare)
-
Impact of COVID-19 pandemic on mental health and health behaviors in Swedish adolescents
- 2022
-
Ingår i: Scandinavian Journal of Public Health. - : SAGE Publications. - 1403-4948 .- 1651-1905. ; 50, s. 26-32
-
Tidskriftsartikel (refereegranskat)abstract
- Aims: There is an urgent need to explore the impact of the COVID-19 pandemic on adolescent mental health and health behaviours. To date, there are no such studies on Swedish adolescents. As COVID-19 emerged in the middle of our ongoing 2-year follow-up examination of the Study of Adolescence Resilience and Stress, we had the unique opportunity to use the corona outbreak as a 'natural experiment' to study the impact of COVID-19 on 15-year-old adolescents in Sweden. Methods: Adolescents (baseline age 13.6 +/- 0.4 years) were recruited from schools in western Sweden (during the COVID-19 outbreak schools were kept open for those under 16 years of age). The COVID-19 pandemic reached Sweden on 31 January 2020. A total of 1316 adolescents answered the 2-year follow-up survey before (unexposed to COVID-19 pandemic, controls) and 584 after 1 February 2020 (COVID19-exposed). Data on stress, psychosomatic symptoms, happiness, relationships with parents and peers, school and health behaviours were collected. Results: Adolescents reported higher levels of stress and psychosomatic symptoms and lower levels of happiness at follow-up compared to baseline. These changes occurred to a similar extent in both the control and COVID-19-exposed groups. Likewise, the COVID-19-exposed group showed no deterioration in peer relations or relations with parents versus controls. We did not find any significant differences between groups regarding sleep duration and physical activity. Conclusions: Swedish adolescents exposed to COVID-19 during most of 2020 showed no differences in longitudinal changes in mental health, relationships with parents and peers, and health behaviours compared to those not exposed to COVID-19.
|
|
| 2. |
- Henriksson, Göran
(författare)
-
Aristotle, King David, King Zhou and Pharao Thutmosis III have seen comet Encke
- 2020
-
Ingår i: MEDITERRANEAN ARCHAEOLOGY & ARCHAEOMETRY. - : UNIV AGEAN, DEPT MEDITERRANEAN STUD. - 1108-9628 .- 2241-8121. ; 20:1, s. 29-43
-
Tidskriftsartikel (refereegranskat)abstract
- Aristotle saw a great winter comet with a tail reaching up to Orion. It was Comet Encke on 31 December in 372 BC. When it became visible in the morning, after 9 January 371 BC, Ephoros saw its nucleus split up in two parts. The sword of the Angel of the Lord seen above Jerusalem, as punishment for the sins by King David, was Comet Encke in 964 BC. The sword was redrawn at Ornan.s threshing floor on 8 June 964 BC. David bought this place and built an altar that later became the Altar of Salomon.s Temple in Jerusalem. A second century BC text contains a unique record of a bright comet observed at the end of the Shang Dynasty:.When King Wu [of Zhou] attacked King Zhou [of Shang], a comet appeared and tendered its handle to Yin.. This was Comet Encke on 22 June 1060 BC and 17 days later, on 9 July in 1060 BC, Encke was depicted on a rock carving in Sweden. A stele at the temple of Amon at Gebel Barkal in Nubia, mentions first the important victories at Megiddo, in year 33, and Mittani, in year 23 of the reign of Pharaoh Thutmosis III. However, the text also mentions an important celestial phenomenon during his 47th year of reign. The description fits very well with the bright appearance of Comet Encke at the end of January in 1460 BC. This supports the High Chronology for Egypt with 1506 BC as the first year of reign of Thutmosis III, the sixth Pharaoh of the 18th Dynasty in Egypt.
|
|
| 3. |
- Henriksson, Göran
(författare)
-
A Relativistic Binary Black Hole Model for AP Lib : with Kip Thorne's Kerr Black Hole
- 2018
-
Bok (övrigt vetenskapligt/konstnärligt)abstract
- Some galaxies have violent activities at their nucleus (AGN). The dominant model is a super massive Black Hole surrounded by a bright accretion disk and a dust ring. I have for the first time identified periodic variations in an AGN, AP Lib. The periods in days are 954 (orbit), 45 (prec. of B-comp.), 3.2 (inner disk edge) and 3.1 (jet spin). The central object is a Black Hole with mass 1.26 billion Msun surrounded by an accretion disk seen at an inclination of 77º.1. A Black Hole with a mass of about 5% of the central object moves in an orbit with period 954 days at a distance of 1900 AU. The inclination of the orbital plane is 87º. In the same orbit there are three clouds at the Lagrange points L3, L4 and L5. These eclipse the bright accretion disk and causes three minima. Gravitational lens effects are also observed. A model for the light emitted from the accretion disk around the Kerr Black Hole, by Kip Thorne, has been used to estimate the distance by comparison with the flux received at the Earth. The three clouds prevent a homogenous inflow of matter to the accretion disk and after correction the distance = 0.70 billion light years and the Hubble parameter = 67.3 km/s/Mpc.
|
|
| 4. |
- Henriksson, Göran
(författare)
-
King David's Altar in Jerusalem Dated by the Bright Appearance of Comet Encke in 964 BC
- 2018
-
Ingår i: Annals of Archaeology. - : SRYAHWA Publications. - 2639-3662. ; 1:1, s. 30-37
-
Tidskriftsartikel (refereegranskat)abstract
- At the time corresponding to our end of May and beginning of June in 964 BC a bright comet with a very long tail dominated the night sky of the northern hemisphere. It was Comet Encke that was very bright during the Bronze Age, but today it is scarcely visible to the naked eye. It first appeared as a small comet close to the zenith, but for every night it became greater and brighter and moved slowly to the north with its tail pointing southwards. In the first week of June the tail was stretched out across the whole sky and at midnight it was visible close to the meridian. In this paper the author wishes to test the hypothesis that this appearance of Comet Encke corresponds to the motion in the sky above Jerusalem of “the sword of the Angel of the Lord”, mentioned in 1 Chronicles, in the Old Testament. Encke was first circumpolar and finally set at the northern horizon on 8 June in 964 BC at 22. This happened according to the historical chronology between 965 and 960 BC. The calculations of the orbit of Comet Encke have been performed by a computer program developed by the author. It has been calibrated from depictions on Swedish rock-carvings, Chinese texts and Sumerian cylinder seals and gives useful results at least back to 2654 BC.
|
|
| 5. |
- Henriksson, Göran, et al.
(författare)
-
Evidence For Minoan Astronomical Observations From the Peak Sanctuaries On Petsophas And Traostalos
- 2017
-
Ingår i: Proceedings of the 1st (Kokino: archaeological and astronomical aspects - parallels and experience) & 2nd (Kokino:Giving gifts to God) International Archaeological Conferences held in Skopje & Kumanovo, 2016-2017. - Skopje : National Institution Museum of Kumanovo. - 9786084792109 ; , s. 7-16
-
Konferensbidrag (refereegranskat)abstract
- Our results indicate that the Minoans were conducting systematic observations of the sun, the moon and the stars - particularly Arcturus - at the sites Petsophas and Traostalos early in the Middle Minoan Period. We propose that there were practical as well as religious reasons for the Minoan interest in the motions of the heavenly bodies: for example the knowledge acquired from the observations contributed to navigation and made possible the regulation of a ritual lunisolar calendar.
|
|
| 6. |
- Henriksson, Göran
(författare)
-
The acceleration of the Moon and the Universe - the Mass of the Graviton
- 2017
-
Ingår i: Advances in Astrophysics. - : Isaac Scientific Publishing. - 2415-6450 .- 2415-6469. ; 2:3, s. 184-196
-
Tidskriftsartikel (refereegranskat)abstract
- To get accurate knowledge about the longitudinal motion of the Moon we must use the oldest preserved interpretable depictions and texts from the ancient cultures. Well documented total solar eclipses from Sumerian cylinder seals, Sumerian, Babylonian, Assyrian, Chinese, Hittite and Greek texts, and depictions on the Swedish rock-carvings from the Bronze Age, have been used in an analysis, performed by the author in 2011, to determine the lunar sidereal secular acceleration. It was based on 33 ancient total or almost total solar eclipses back to 3653 BC. In 2014 and 2016 the margins of error was determined. The new value for the lunar sidereal secular acceleration in longitude = -30.128±0.0035 arcseconds/(century)2 ("/cy2). The lunar secular acceleration, from the Lunar Laser Range (LLR) measurements, -25.856 ±0.003"/cy2, must be corrected for the relativistic effect, -3.604"/cy2, in the Earth-Moon inertial system, to get the lunar sidereal secular acceleration, –29.460 "/cy2, corrected for General Relativity. The difference between this value and the new calibration, -0.668±0.0046"/cy2, corresponds to the cosmological acceleration predicted by Dvali et al. in a Modified Theory of gravity. This value corresponds to a mass of the graviton = 1.306 ±0.009 x 10-56 grams. If this theory is correct, there is no need for the enigmatic Dark Energy.
|
|
| 7. |
- Henriksson, Göran, 1943-
(författare)
-
Old Uppsala and Nicolaus Copernicus - Co-operation with Wladyslaw Duczko
- 2016
-
Ingår i: Meetings at the borders. - Pultusk : Pultusk Academy of Humanities 2016. - 9788375493009
-
Konferensbidrag (refereegranskat)abstract
- The pagan Great Midwinter Sacrifice at Old Uppsala took place every eighth year. The starting date was defined by the full moon that occurred between 28 January and 26 February in the Gregorian calendar. By combining historical data and calculations of the dates of full moons, the author has established the exact years of the eight-year cycle. One such year was 852 CE. According to the rule of semi-legendary King Aun, the phases of the moon fell one day earlier after 304 years. Such displacements in the eight-year cycle took place in 1692, 1388, 1084, 780, and 476. King Aun is considered to have reigned about 450-500 CE and to have been buried at Old Uppsala. The three 'royal' burial mounds have been dated to 450-550 CE. They are oriented in such a way that they could have been used to regulate the sacrificial calendar. During excavations in 2013, two long rows of postholes were discovered. An 850 m long row was oriented towards the northern limit for the rising midwinter full moon on the earliest date, and the approximately 600 m long row was oriented towards the rising sun on 6-8 February. If it was a full moon on that day, the Great Midwinter Sacrifice the following year should begin on its earliest date.Identification of the tomb of Nicolaus Copernicus in the Cathedral in Frombork by DNA from his hair found in his copy of Calendarium Romanum Magnum by Stöffler, belonging to the Library at the Astronomical Observatorium in Uppsala.
|
|
| 8. |
- Henriksson, Göran, 1943-
(författare)
-
The acceleration of the Moon and the Universe
- 2016
-
Ingår i: Proceedings of the 51th RENCONTRES DE MORIOND. - : ARISF. - 9791096879014 ; , s. 259-260
-
Konferensbidrag (refereegranskat)abstract
- In 2015, I determined the margins of error in my new calibration of the lunar sidereal secular acceleration, –30.128 ±0.0035 arcseconds/century2 ("/cy2), based on 33 ancient total solar eclipses. The lunar secular acceleration, from the Lunar Laser Range (LLR) measurements, –25.856 ±0.003 "/cy2, must be corrected for relativistic effects, –3.604 "/cy2, in the Earth-Moon-system to get the lunar secular acceleration, –29.460 "/cy2. The difference between this value and my new calibration, –0.668 ±0.0046 "/cy2, corresponds to the cosmological acceleration predicted by Dvali et al. in a modified theory of gravity with the mass of the graviton 1.306 ±0.009 x 10-56 grams.
|
|
| 9. |
- Henriksson, Göran, 1943-
(författare)
-
THE NORDIC CALENDAR AND THE GREAT MIDWINTERSACRIFICE AT OLD UPPSALA
- 2016
-
Ingår i: THE MATERIALITY OF THE SKY. - 9781907767098 ; , s. 99-110
-
Konferensbidrag (refereegranskat)abstract
- The pagan Great Midwinter Sacrifice at Old Uppsalatook place every eighth year. The starting date was definedby the full moon that occurred between 28 January and 26 February in theGregorian calendar. By combining historical data and calculations of the datesof full moons, the author has established the exact years of the eight-year cycle.One such year was 852 CE. According to the rule of semi-legendary King Aun, thephases of the moon fell one day earlier after 304years. Such displacements in the eight-year cycle took place in 1692, 1388,1084, 780, and 476. King Aun is considered to have reigned about450-500 CE and to have been buried at Old Uppsala. The three 'royal' burialmounds have been dated to 450-550 CE. They are oriented in such a way that theycould have been used to regulate the sacrificial calendar. During excavationsin 2013, two long rows of postholes were discovered. An 850 m longrow was oriented towards the northern limit for the rising midwinter full moonon the earliest date, and the approximately 600 m longrow was oriented towards the rising sun on 6-8 February. If it was a full moonon that day, theGreat Midwinter Sacrifice the following year should begin on its earliest date.
|
|
| 10. |
- Henriksson, Göran
(författare)
-
Income distribution and health : the role of individual and municipality levels
- 2014
-
Doktorsavhandling (övrigt vetenskapligt/konstnärligt)abstract
- The question whether income inequality is detrimental for health is still, after almost a quarter of a century and an impressive amount of literature, debated. The purpose of this thesis is to explore the association between income inequality and different health outcomes in a relatively egalitarian country during the 1990s and early 2000s, thereby contributing to a better understanding of the multitude of interpretations. Specific aims are to analyse whether there is an association between income distribution in Swedish municipalities and risk of death and to test the hypothesis that manual workers are at higher risk of death than are non-manual employees when living in municipalities with higher income unequal. Further, to disentangle the effects of income inequality and residential segregation, measured as parish level homogeneity, on acute myocardial infarction and to test the hypothesis that income inequality at the municipality level, as a marker of social stratification within the municipalities, would be associated with risk of attempted suicide. The data used for the four studies in the thesis were compiled as two data sets. The mid-agedata set comprised all people 40 - 64 years in 1990 Swedish census and linked with the national cause-of-death register and the National Patient Register, altogether 2.5 million individuals. The second data set consisted of all individuals living in Sweden at age 16 and born 1972 or 1977 (N= 213 395). The unique personal identification number used in Sweden enabled linkage between the national inpatient register at the National Board of Health and Welfare and Statistics Sweden. The effect from income inequality on mortality was overestimated using an ordinary least square regression as compared to the estimates in a hierarchical analysis. The latter showed an inverse association with the relative risk which, once adjustment for individual level variables was made, disappeared. We used data comprising all people 40 - 64 years and being employed in 1990 to analyse the hypothesis that manual workers had a higher “vulnerability” than non-manual employees to income inequality. The results indicated that unskilled manual workers living in municipalities with higher income inequality had a higher mortality risk than their peers living in more income egalitarian municipalities. For high level non-manual employees the risk was inverse. We studied how the association between AMI and income inequality at the municipality level changed when parish level homogeneity regarding affluence and disadvantage respectively, was included in the analysis. There was an overall inverse association between income inequality and AMI which seemed to be explained by the level of homogeneity regarding affluence at the parish level within the municipalities. We noted that the affluent parishes tended to be within the municipalities within the three largest metropolitan areas Stockholm, Gothenburg and Malmö. To better understand the role of economic activity we used the concept of economic regions in analyses of associations between income inequality, economic deprivation at parish and individual level and attempted suicide (AS) among youth. We found no overall association between income inequality and AS but once adjustment for economic region was made, there was a significant inverse association between income inequality and AS, strongest in the three metropolitan areas. Although there was a strong association between the degree of economic deprivation at the parish level and AS it did not explain much of the association between income inequality and attempted suicide at the municipality level. The overall conclusion from the four studies is that there seems to be an inconsistent (weak) association between income inequality and health, dependent on which context analyses are made and the choice of outcome. However, the studies raise a number of issues related to the complexity in which the research question is embedded, for example the lack of data on welfare institutions or other potentially “buffering” mechanisms.
|
|
