In my master’s thesis, I consider with flow measurement. In shortness is described principle of flow sensors functionality, its advantages and disadvantages. I designed and made device for practice measurement of flow. On this device are installed three flowmeters The characteristic of this flowmeters were measured and evaluated. I made program in LabVIEW to collect and analyze information from instaled flowmeters.

Syftet med detta projekt var att skapa en paddlingssensor vilket mäter paddlingskrafteni flera olika riktningar. Detta uppnås genom att skapa en sensor vars kopplingsschema är i enlighet med en wheatstonebrygga och två trådtöjningsgivare som placeras i strategiskt valda positioner. Dessa positioner tillåter sensorn att mäta flera krafter i olika riktningar. Jämfört med tidigare sensorer som endast mäter spänningsskillnaden i en riktning med endast en givare. Trådtöjningsgivarnas positionering utvärderades samt den optimala positioneringen. Sensorn som konstruerades kunde registrera spänningsförändringar som var proportionella till en pålagd vikt. En tydlig linjär korrelation observerades mellan viktökningen och spänningsförändringen. / The purpose of this project was to construct a paddle sensor that has the ability to measure the paddle force in multiple different directions. This can be attained by creating a sensor where the circuitry is in accordance with a wheatstonebridge and strain gauges are strategically placed on predetermined positions. These positions allow the sensor to be able to measure the force in different directions. The positions of the strain gauges were evaluated, and the most optimal placement was chosen. The created sensor was able to register voltage changes which were proportional to an added weight. As the weight increased so did the voltage changes and a clear linear correlation was observed.

In Old West Norse there is mention of an Arctic skin and osier boat, which was paddled with Old West Norse (húð)keipr, diminutive keipull, formed on Germanic *kaip- ’bend, unfold’ according to the construction method. In East Norse there was a corresponding wooden boat, e.g. Swedish själ-myndrick, formed on mynda verb ‘paddle’ (&lt; Primitive Norse *mundian ‘aim at a certain goal, take aim’). In the provinces south of this verb’s area of distribution there occurs instead svepa verb ’paddle’ (&lt; Primitive Germanic *swaipōn ‘swing’). The earliest instances of Nordic rowing navigation are found in Norway and Denmark. Instances of rowing in the Baltic area are found on some picture stones from about the 6th century. But oarlocks with a grommet were probably used already for the steering oar in the paddled boats of the Bronze Age. An early oarlock (with a grommet) is that made of a goose-necked piece of wood, Old Swedish hār, Old West Norse hár (&lt; *hanhu-, *hanha- ‘branching, fork of a branch’) and Old West Norse keipr (&lt; *kaip- ‘something with a crooked or bent (-back) shape’. The word hár exists as a first element in Old Swedish hā-band ‘oar-loop’, Old West Norse há-bora ‘oar-port’ etc. Old West Norse keipr ‘oarlock’ has no ancient compounds. East Nordic hamna (&gt; Finnish hamina), Old Danish hafnæ (Old Frisian hevene) and West Nordic hamla (Faroese homla, Old English hamele, hamule) ‘oar-loop’ occurred early on the oarlock with a grommet; hamna may be a derivation of the stem in Primitive Norse *haƀan verb ‘hold (fast)’, alternatively *hafna- ‘clasp something’; hamla derives from a Germanic *hamilōn with the meaning ‘bridling band’. Centrally in the Nordic area hamna (Danish havne) and hamla ‘oar-loop’ were also used denominatively with the meaning ‘row pushing in a hamna/hamla (oar-loop)’. In addition there is the Swedish dialectal sväva (~ sveva, svävja) ‘row (back, break etc.) with pushing rowing’ and in the group of older verbs for rowing there is East Swedish hopa &lt; Primitive Norse *hōƀian ‘fix one’s eyes upon a certain goal (in the distance)’. With word formations on Germanic *þulna- ‘wooden plug’ there arose from the Middle Ages and in the North Sea countries a new terminology for the oarlock: Norse tull, toll ‘oarlock with a thole pin’. Even younger concepts are tullgång ‘oarlock with two thole pins’, årklyka, årgaffel ‘oar crutch’. A distinctive trait of Old Swedish hār and hamna, Old West Norse hár and hamla and keipr and other common words for the oarlock is in these words the shift of meaning ‘oarlock of a specific kind’ &gt; ‘almost any kind of oarlock’. Finally, the question arises whether or not the word svear of a tribe by Lake Mälaren could be tied to the paddling through a connection to the stem of the verbs svepa and sväva. / <p>Ingår även i serie: Studier till en svensk dialektgeografisk atlas, 8</p>

The molecular structure of the title compound, [Fe(C 5 H 5 )(C 15 H 12 N)], consists of a ferrocene moiety with an N-phenylpyrrole heterocycle bound to one cyclopentadienyl ring. The 1,3-disubstitution of the pyrrole results in an L- shaped arrangement of the molecule with plane intersections of 2.78 (17)° between the pyrrole and the N-bonded phenyl ring and of 8.17 (18)° between the pyrrole and the cyclopentadienyl ring. In the crystal, no remarkable intermolecular interactions are observed.

Two trigonal tritopic ligands with different conformational degree of freedom: conformationally labile H3tcbpa (tris((4-carboxyl)phenylduryl)amine) and conformationally obstructed H3hmbqa (4,4′,4′′-(4,4,8,8,12,12-hexamethyl-8,12-dihydro-4H-benzo[9,1]quino-lizino[3,4,5,6,7-defg]acridine-2,6,10-triyl)tribenzoic acid) are assembled with square-planar paddle-wheel nodes with the aim of selective engineering of the frameworks with tbo and pto underlying net topologies. In the case of H3tcbpa, both topological types were obtained forming non-interpenetrated MOFs namely DUT-63 (tbo) and DUT-64 (pto). Whereas synthesis of DUT-63 proceeds under typical conditions, formation of DUT-64 requires an additional topology directing reagent (topological modifier). Solvothermal treatment of the conformationally hindered H3hmbqa ligand with the Cu-salt results exclusively in DUT-77 material, based on the single pto net. The possibility to insert the salen based metallated pillar ligand into networks with pto topology post-synthetically results in DUT-78 and DUT-79 materials (both ith-d) and opens new horizons for post-synthetic insertion of catalytically active metals within the above-mentioned topological type of frameworks.

Two new coordination polymers, DUT-82 and DUT-83 (DUT – Dresden University of Technology), were synthesized by a solvothermal reaction in methanol of rhodium(II) acetate and the tricarboxylic acid H₃btc (btc – benzene-1,3,5-tricarboxylate) or H₃btb (btb – benzene-1,3,5-tribenzoate), respectively. After drying using supercritical carbon dioxide, aerogels with specific surface areas of up to 1150 m² gˉ¹ and pore volumes of up to 2.26 cm³ gˉ¹ were obtained. Although there is no long range order in the materials, the presence of rhodium paddle-wheel units and thus a local order was proven by X-ray absorption spectroscopy measurements. DUT-82 shows good performance in the adsorption of hydrogen and a high affinity for carbon monoxide, which is rarely observed for metal–organic frameworks. Catalytic investigations demonstrate the activity of DUT-82 in the heterogeneous hydrogenation of styrene as a model system. DUT-82 can be recycled for at least ten cycles underlining the stability during the course of reaction.

The molecular structure of the title compound, [Fe(C 5 H 5 )(C 15 H 12 N)], consists of a ferrocene moiety with an N-phenylpyrrole heterocycle bound to one cyclopentadienyl ring. The 1,3-disubstitution of the pyrrole results in an L- shaped arrangement of the molecule with plane intersections of 2.78 (17)° between the pyrrole and the N-bonded phenyl ring and of 8.17 (18)° between the pyrrole and the cyclopentadienyl ring. In the crystal, no remarkable intermolecular interactions are observed.

With the growing need for secure and high-capacity communications, innovative solutions are needed to meet the demands of tomorrow. One such innovation is to make use of the still unutilized spatial dimension of light in communications, which has promising applications in both enabling higher data traffic as well as the security protocols of the future in quantum communications. The perhaps most promising way of realizing this technology is through spatial division multiplexing (SDM) in optical fibers. There are many challenges and open questions in implementing this, such as how perturbations to the signal should be kept under control and which type of optical fiber to use. Consequently, this thesis focuses on the implementation of SDM in few-mode fibers where the perturbation effects on the spatial distribution have been investigated. Following this investigation, an implementation of adaptive spatial mode control using a motorized polarization controller has been implemented. The mode control has been done with the focus on having relevance for quantum technology applications such as Quantum Key Distribution (QKD) and quantum random number generation (QRNG) but also for spatial division multiplexing (SDM) for general communications. For this reason, two evaluation metrics have been optimized for: extinction ratio and equal amplitude. The control algorithm used is an adaptation of the optimization algorithm Stochastic Parallel Gradient Descent (SPGD). Control has been achieved in stabilizing the extinction ratio of LP11a and LP11b over 12 hours with an average extinction ratio of 98 %. Additionally, equal amplitude between LP11a and LP11b has been achieved over 1 hour with an average relative difference of 0.42 % and 0.45 %. Out of the perturbation effects investigated; temperature caused large disturbances to the signal which later is corrected for with the implemented algorithm.

This dissertation advances the Vibration-Based Sound Power (VBSP) method for measuring the sound power of vibrating structures, expanding its applicability to a wider range of geometries and acoustic environments. The research addresses limitations of traditional sound power measurement techniques by developing an alternative method that achieves near Precision (Grade 1) accuracy while maintaining feasibility for in situ testing under uncontrolled acoustic conditions. After reviewing the current VBSP method in Unit 1, Unit 2 introduces stitching techniques for Scanning Laser Doppler Vibrometer (SLDV) measurements, enabling accurate 3D scans and extending the method to complex geometries. Experimental validation is provided for baffled simply curved plates and arbitrarily curved plates. The method also estimates sound power in uncontrolled acoustic environments, where traditional approaches are less effective. Initial work on thin unbaffled flat plates is presented, with a practical demonstration using pickleball paddles as a representative unbaffled configuration. Unit 3 addresses the computational demand of constructing radiation resistance (R) matrices, a key limitation of the VBSP method. Symmetry-based techniques leveraging acoustic reciprocity and geometric symmetries are applied to reduce computational demands by up to 75% for unbaffled structures. For baffled configurations, translational symmetry of acoustic reciprocity between elements results in the R matrix having Toeplitz symmetry, reducing the computational complexity from n^2 to n, where n is the number of mesh elements. Unit 4 introduces an indirect VBSP (I-VBSP) method to estimate sound power from encased sources, achieving near Precision (Grade 1) accuracy relative to the ISO 3741 standard using only a single surface scan. Validated on a Bluetooth speaker, this approach provides a simplified alternative to conventional methods, offering a practical solution for sound power measurement in structures with encased noise sources. Overall, this dissertation demonstrates that the VBSP method serves as a viable alternative to conventional sound power techniques, effectively applied across various geometries and scenarios. While the current VBSP method does not accommodate structures with multiple vibrating surfaces in contact, the I-VBSP method can theoretically achieve this by enclosing a structure and scanning one vibrating side. This research lays the foundation for future studies through the development of a generalized R matrix and application of foundational symmetries, enhancing the understanding of acoustic radiation from vibrating structures. Ultimately, this work aims to reduce noise pollution in consumer products through improved acoustic design and measurement strategies.