Geopotential Field Anomaly Continuation with Multi-Altitude Observations

Conventional gravity and magnetic anomaly continuation invokes the standard Poisson boundary condition of a zero anomaly at an infinite vertical distance from the observation surface. This simple continuation is limited, however, where multiple altitude slices of the anomaly field have been observed. Increasingly, areas are becoming available constrained by multiple boundary conditions from surface, airborne, and satellite surveys. This paper describes the implementation of continuation with multi-altitude boundary conditions in Cartesian and spherical coordinates and investigates the advantages and limitations of these applications. Continuations by EPS (Equivalent Point Source) inversion and the FT (Fourier Transform), as well as by SCHA (Spherical Cap Harmonic Analysis) are considered. These methods were selected because they are especially well suited for analyzing multi-altitude data over finite patches of the earth such as covered by the ADMAP database. In general, continuations constrained by multi-altitude data surfaces are invariably superior to those constrained by a single altitude data surface due to anomaly measurement errors and the non-uniqueness of continuation

Region Spherical Harmonic Magnetic Modeling from Near-Surface and Satellite-Altitude Anomlaies

The compiled near-surface data and satellite crustal magnetic measured data are modeled with a regionally concentrated spherical harmonic presentation technique over Australia and Antarctica. Global crustal magnetic anomaly studies have used a spherical harmonic analysis to represent the Earth's magnetic crustal field. This global approach, however is best applied where the data are uniformly distributed over the entire Earth. Satellite observations generally meet this requirement, but unequally distributed data cannot be easily adapted in global modeling. Even for the satellite observations, due to the errors spread over the globe, data smoothing is inevitable in the global spherical harmonic presentations. In addition, global high-resolution modeling requires a great number of global spherical harmonic coefficients for the regional presentation of crustal magnetic anomalies, whereas a lesser number of localized spherical coefficients will satisfy. We compared methods in both global and regional approaches and for a case where the errors were propagated outside the region of interest. For observations from the upcoming Swarm constellation, the regional modeling will allow the production a lesser number of spherical coefficients that are relevant to the region of interes

Investigation of the Crust of the Pannonian Basin, Hungary Using Low-Altitude CHAMP Horizontal Gradient Magnetic Anomalies

The Pannonian Basin is a deep intra-continental basin that formed as part of the Alpine orogeny. It is some 600 by 500 km in area and centered on Hungary. This area was chosen since it has one of the thinnest continental crusts in Europe and is the region of complex tectonic structures. In order to study the nature of the crustal basement we used the long-wavelength magnetic anomalies acquired by the CHAMP satellite. The SWARM constellation, scheduled to be launched next year, will have two lower altitude satellites flying abreast, with a separation of between ca. 150 to 200 km. to record the horizontal magnetic gradient. Since the CHAMP satellite has been in orbit for eight years and has obtained an extensive range of data, both vertically and horizontally there is a large enough data base to compute the horizontal magnetic gradients over the Pannonian Basin region using these many CHAMP orbits. We recomputed a satellite magnetic anomaly map, using the spherical-cap method of Haines (1985), the technique of Alsdorf et al. (1994) and from spherical harmonic coefficients of MF6 (Maus et aI., 2008) employing the latest and lowest altitude CHAMP data. We then computed the horizontal magnetic anomaly gradients (Kis and Puszta, 2006) in order to determine how these component data will improve our interpretation and to preview what the SW ARM mission will reveal with reference to the horizontal gradient anomalies. The gradient amplitude of an 1000 km northeast-southwest profile through our horizontal component anomaly map varied from 0 to 0.025 nT/km with twin positive anomalies (0.025 and 0.023 nT/km) separated by a sharp anomaly negative at o nT/km. Horizontal gradient indicate major magnetization boundaries in the crust (Dole and Jordan, 1978 and Cordell and Grauch, 1985). Our gradient anomaly was modeled with a twodimensional body and the anomaly, of some 200 km, correlates with a 200 km area of crustal thinning in the southwestern Pannonian Basin

Analysis of the Relationship between Cerebellar Volume and Psychological Parameters in 20s Male Adults

AbstractThis study measured the cerebellar volume of normal male adults in 20s with magnetic resonance imaging (MRI) and analysed the relationship between cerebellar volume and various psychological parameters. The cerebellar volume of 58 males (mean age, 24.0-2.8 years) was measured using MRI. The Symptom Checklist-90-R (SCL-90-R) and the Component of Type A Behavior tests were performed. Using linear regression analysis, the relationship between cerebellar volume and psychological parameters was analysed. As phobic anxiety and ambition increased, cerebellar volume of normal male subjects in 20s decreased. This study showed that for even normal male adults, there exists a possible relationship between various psychological parameters and cerebellar volume

Editorial: Similarities and Discrepancies Across Family Members at Multiple Levels: Insights From Behavior, Psychophysiology, and Neuroimaging

Family members are responsive to one another not just in what they verbally communicate with one another, but can also be connected through psychological, behavioral, physiological, and neural processes. These complex family dynamics can be represented as similarities and discrepancies between family members in various developmental processes. Such similarities may prepare developing youth to adapt to their family environments, as well as outside environments including schools, neighborhood, and community spaces. As a growing number of studies are examining the role of parent-child concordance or synchrony in youth development (e.g., Lee et al., 2017, 2018; Nguyen et al., 2021), it is critical to identify similarities and discrepancies across family members at different levels (e.g., perception, behavior, biology) to inform our understanding of how families affect adolescent functioning and well-being. There is a need to gather convergent evidence on interpersonal family similarity using a variety of approaches (e.g., observation, survey, psychophysiology, and neuroimaging) across family subsystems. This Research Topic aims to provide as interdisciplinary understanding of how multi-level interpersonal similarity across family members can contribute to youth development

A STUDY ON THE GRIP FORCE DURING PUTTING STROKE

There are lots of variables to affect the control of ball movement during golf putting. Among several variables, it is believed that grip force during putting stroke is one of the important variables. However, there is not much quantitative evidence from published literature (Delay 1997, Gwyn 1993). Therefore, the purpose of this study was to quantify the grip force by comparing putts performed by elite and novice golfers and to identify the relationship between kinematic parameters and the grip force at 16 different parts of subjects’ right and left hand at each putting phase

A tracheoinnominate artery fistula presenting with massive hemorrhage in a 13-year-old boy

Despite its rarity, a tracheoinnominate artery fistula can result in catastrophic hemorrhage. Here, we describe a case of a 13-year-old boy with such a condition following tracheostomy. After identification of pulsatile bleeding from the tracheostoma, temporary control of hemorrhage was obtained using hyperinflation of the tracheostomy tube cuff. Subsequently, a lesion indicative of a tracheoinnominate artery fistula was found on a computed tomography scan, and the diagnosis was confirmed at surgery. After surgery, he was discharged with no recurrent bleeding. This case highlights the importance of high suspicion and prompt management of tracheoinnominate artery fistula