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This article discusses the prenatal diagnosis and outcomes of meso/dextrocardia, a cardiac axis abnormality. The study reviewed 29 cases of fetal meso/dextrocardia diagnosed in a single hospital between January 2014 and February 2024. The results showed that there were eight cases of mesocardia and 21 cases of dextrocardia, with different complications associated with each. The study emphasizes the importance of evaluating the entire fetal body for anomalies when meso/dextrocardia is detected. [Extracted from the article]

Development and testing of a cryocooler-cooled superconducting pulse coil is described and discussed.

The applicability of high-Tc superconducting parallel conductors to pancake coils was investigated and small test coils were would with NbTi 3-strand parallel conductors to verify the theoretical result.

A study of the possible solutions to the problem of 'single strand stability' in multistrand superconducting cables is presented. A proposed change in the design of the cable, aimed at improving its stability in relation to the quench of a single strand, is evaluated. This is accomplished by testing a number of multistrand superconducting cables manufactured from insulated superconducting strands that utilizes varying cabling techniques.

The design and fabrication of a 1T cryocooler-cooled pulse coil operating at 40 K are described. To realize a uniform current distribution and to lessen the alternating current loss density down to the level of a single strand, a 4-strand interlayer-transposed parallel conductor composed of Bi2223 rectangular cross-sectional multifilamentary wires was adopted. Results indicate that the highest temperature of the coil was 40.5 K and the difference in temperature inside the winding was about 2 K.

Research was conducted to evaluate a high temperature superconducting (HTS) cooling model coil for superconducting magnet energy storage. The objective was to make a HTS coil that is cooled to 40 K by a single-stage cryocooler and continuously operated at 1 Hz with a field amplitude of 1 T. The cooling model coil system was made to examine the effective arrangement of the heat drains. Results indicate that the HTS coil temperature is 43 K level when the alternating current losses are about 7 W and the temperature difference between HTS conductor and AIN plate is estimated to be 0.2 K.

Conductor configuration and characteristics of superconducting cable for 50Hz a.c. use are reported. We developed a.c. conductors aiming low loss kA class current capacity. In consideration of reducing the current degradation by cabling, structures suitable for a.c. conductor are designed. In these conductors, low loss a.c. superconducting wires with very fine NbTi filaments are stranded around central cable of Cu-Ni or stainless steel wires for equal cooling condition, equal current distribution and mechanical reinforcing. Characteristics of small coils with these conductor at 50Hz a.c. load are tested and reported.

Stabilities of magnets in a high gravitational field up to 2000 G are discussed, based upon the experimental results of forced quench tests in a set of rotating magnets, in order to establish the stability design criterion of field windings of superconducting generators. Relations of propagation velocities, recovery currents, minimum quench energy and heat transfer characteristics are studied, a good agreement between the experimental results and a theory confirmed the improvement of magnet stability in a high gravitational field because of the enhanced heat transfer characteristics.