No / Concrete filled steel columns have been used widely in structures throughout the world in recent years especially in Australia and the Far East. This increase in use is due to the significant advantages that concrete filled steel columns offer in comparison to more traditional construction methods. Composite columns consist of a combination of concrete and steel and make use of these constituent material's best properties. The use of composite columns can result in significant savings in column size, which ultimately can lead to significant economic savings. This reduction in column size can provide substantial benefits where floor space is at a premium such as in car parks and office blocks. The use of stainless steel column filled with concrete is new and innovative, not only provides the advantage mentioned above, but also durability associated with the stainless steel material. This paper concentrates on the axial capacity of the concrete filled stainless steel columns. A series of tests was performed to consider the behaviour of short composite stainless steel columns under axial compressive loading, covering austenitic stainless steels square hollow sections filled with normal and high strength concrete. Comparisons between Eurocode 4, ACI-318 and the Australian Standards with the findings of this research were made and comment.

A series of tests was performed to consider the behaviour of short composite columns under axial compressive loading, covering a range of S275 and S355 grade steel square hollow section filled with normal and high strength concrete. The interaction between the steel and the concrete component is considered and the results show that concrete shrinkage has an effect on the axial strength of the column. Comparisons between Eurocode 4, ACI-318 and the Australian Standards with the findings of this research were made. Result showed the equation used by the ACI-318 and the proposed Australian Standards gave better predication for the axial capacity of concrete filled SHS columns than the Eurocode 4.

Yes / In this paper, single-element and MIMO microstrip antenna with two pairs of unequal slits is proposed as a circularly polarized antenna with negligible back radiation for 5G mid-band handsets. The unequal pairs of slits are engraved on the antenna patch to guarantee the presence of the circular polarization (CP). The proximity-coupled feeding technique is used to excite the proposed microstrip antenna in order to provide larger antenna -10 dB bandwidth which approaches 10.8% (3.48-3.87 GHz). A novel analysis technique is proposed in this paper that demonstrates the 3D axial ratio pattern in order to generate CP in the broadside direction without affecting the structure of the ground plane which ensures weak back radiation. The 3 dB axial ratio bandwidth (ARBW) is found to be equal to 4.1% extended along the range (3.58-3.73 GHz). To make the design more compatible with the 5G mid-band handsets, the 2 × 2 MIMO structure of the proposed antenna with reduced mutual coupling (less than -20 dB) is also presented in this work. The simulation and measured results are in good agreement, and both verify the CP characteristics and the weak back radiation of the proposed antenna. / This paper is partially funded by British Council “2019 UK-China-BRI Countries Partnership Initiative Programme” with project titled “Adapting to Industry 4.0 Oriented International Education and Research Collaboration”.

Yes / This study presents a compact broadband wide-slot antenna with broadband left-hand circular polarization compatible with both LTE 42 and LTE 43 standards of 5G mid-band applications. The proposed antenna is fabricated on an FR4 dielectric substrate with overall dimensions of , where is the free space wavelength at the resonant frequency of the antenna. The antenna ground plane is etched to form a square radiating slot with a pair of rectangular ground stubs that are diagonally placed inside the slot. On the other side of the antenna, the feed line is loaded by horizontal and vertical stubs to improve the coupling between the feed line and the square slot. To generate a circular polarization, the feeding stubs cooperate with the pair of rectangular ground stubs to excite the radiating slot of the antenna at two different feeding points whose currents have approximately equal amplitude and 90o phase shift. The measured impedance bandwidth (BW) of the proposed wide-slot antenna is 16.2% (580 MHz along the band 3.3-3.88 GHz), while the observed axial ratio bandwidth (ARBW) is 12.2% (440 MHz in the 3.4-3.84 GHz band). The measured gain values are found to be larger than 2.5 dB along both standards of the 5G mid-band applications. / This work was supported in part by the U.K. Engineering and Physical Sciences Research Council (EPSRC) under Grant EP/E022936/1, and in part by the European Union’s Horizon 2020 Research and Innovation Programme under Grant H2020-MSCA-ITN-2016 SECRET-722424.

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Introduktion: Ankyloserande spondylit är en typ av kronisk inflammatorisk ledsjukdom. Förutom Ankyloserande spondylit benämns den även Bechterews eller Axial spondylartrit. De initierande symtomen är molvärk i ländrygg och bäckenleder vilket gör det svårt att skiljafrån andra tillstånd. Detta leder till en fördröjning på 6-9 år för att bli diagnostiserad. Fysioterapeuten har en viktig roll då träning i form av styrka, kondition och rörlighet är enstandardiserad intervention som behöver individanpassas och kan kompletteras med andrainterventioner. Behandlingens mål är att bromsa sjukdomsförloppet och minskafunktionsnedsättningarna. Syftet med studien var att belysa patienternas perspektiv påvårdprocessen vid Ankyloserande spondylit samt självskattningen av fysioterapeutiskainterventioner. Metod: En kvantitativ studie med empirisk ansats och retrospektiv design medinslag av kvalitativ innehållsanalys utfördes. En egenkonstruerad enkät delgavs i enFacebookgrupp för personer med diagnosen. Resultat: 181 personer deltog i studien. Flestsökte läkare och fysioterapeuter vid symtomdebut, 69,6% respektive 11,1%. Majoriteten i debåda grupperna fick vänta mer än 3 år på remiss och medianvärdet för diagnostisering var 7-10 år. 27,1% väntade max sex månader med att söka vård vid symtomdebut medan 29,8%väntade mer än 3 år. 84,7% hade fysisk träning som behandling och det var den behandlingsom flest upplevde gav bäst effekt. Av deltagarna var det 60% som skattade lägre än 5/10 påupplevelsen av diagnosticeringsprocessen. Konklusion: Studiens resultat belyser det storamissnöjet hos denna patientgrupp. Det sker en stor fördröjning för att få remiss, diagnos ochrätt behandling, därför uppmanar vi till vidare forskning kring hur vården kan bli effektivare.Studien visar att fysioterapeutiska insatser upplevs ha effekt på smärta, funktion och rörelse.

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