Y-stent-assisted coil embolization of anterior circulation aneurysms using two solitaire AB devices: a single enter experience

Wide-neck intracranial aneurysms remain a challenge to endovascular treatment. We describe our experience in repairing wide-neck aneurysms of the anterior circulation located at arterial branch points using coil embolization assisted by Y-stenting using two Solitaire® stents. Six wide-neck intracranial aneurysms located on the middle cerebral artery bifurcation 3, pericallosal artery 1, and anterior communicating artery 2 were repaired by Y-stent-assisted coil embolization using two Solitaire® stents. Four cases were incidental findings of aneurysm and two cases were previously treated ruptured aneurysms that had undergone recanalization. All the cases were successfully treated without complications. Follow-up by digital subtraction angiography and magnetic resonance angiography at six months showed the stents to be patent with no recanalization of the aneurysm sacs. Repairing wide-neck aneurysms of the anterior circulation by Y-stent-assisted coil embolization using two Solitaire® stents is a simple and safe method of treating complex aneurysms. While the results are promising, larger series with longer term follow-ups are needed to corroborate that this treatment method is superior to other technique

Temperature-independent quantum logic for molecular spectroscopy

We propose a fast and non-destructive spectroscopic method for single molecular ions that implements quantum logic schemes between an atomic ion and the molecular ion of interest. Our proposal relies on a hybrid coherent manipulation of the two-ion system, using optical or magnetic forces depending on the types of molecular levels to be addressed (Zeeman, rotational, vibrational or electronic degrees of freedom). The method is especially suited for the non-destructive precision spectroscopy of single molecular ions, and sets a starting point for new hybrid quantum computation schemes that combine molecular and atomic ions, covering the measurement and entangling steps.Comment: v3. Substantially enlarged manuscript with details of derivations and calculations in two appendices. To appear in PR

On the Gas Surrounding High Redshift Galaxy Clusters

Francis & Hewett (1993) identified two 10-Mpc scale regions of the high redshift universe that were seemingly very overdense in neutral hydrogen. Subsequent observations showed that at least one of these gas-rich regions enveloped a cluster of galaxies at redshift 2.38. We present improved observations of the three background QSOs with sightlines passing within a few Mpc of this cluster of galaxies. All three QSOs show strong neutral hydrogen absorption at the cluster redshift, suggesting that this cluster (and perhaps all high redshift clusters) may be surrounded by a ~5 Mpc scale region containing ~ 10^12 solar masses of neutral gas. If most high redshift clusters are surrounded by such regions, we show that the gas must be in the form of many small ( 0.03 cm^-3) clouds, each of mass < 10^6 solar masses. These clouds are themselves probably gathered into > 20 kpc sized clumps, which may be galaxy halos or protogalaxies. If this gas exists, it will be partially photoionised by the UV background. We predict the diffuse Ly-alpha flux from this photoionisation, and place observational limits on its intensity.Comment: 19 pages, 5 figures. Accepted for publication in PAS

Performance of the \u3ci\u3eLeucaena leucocephala\u3c/i\u3e–\u3ci\u3eMegathyrsus maximus\u3c/i\u3e cv Mombasa System and Local Range Grazed by Pelibuey Ewe-Lambs

Mombasa grass and leucaena have shown an excellent agronomic performance grown in tropical semi-arid ranges, the objective of this study was to compare the agronomic performance of Leucaena-Mombasa grown as a silvopastoral system at two leucaena plant densities (10000 and 15000 plants ha-1) and of Pelibuey ewe-lambs grazing it against native unimproved tropical semi-arid range of the state of Morelos, México. Experimental design was a completely random with two replications. Unimproved native range was mainly deciduous shrubs and mixed herbaceous plants (Poaceae and Asteraceae). Stocking rate was the same across treatments and grazing lasted all rainy season. Of the agronomic variables determined, both Leucaena-Mombasa systems showed the same (p\u3e 0.05) forage on-offer total and expressed as herbage-allowance but 29 and 15% higher (p≤ 0.05) respectively than the unimproved native range. Leucaena-Mombasa at the highest leucaena density showed the highest harvest rate, 22 and 50% higher (p≤ 0.05) than the registered at the lower density and unimproved native range, respectively. Unimproved native range herbaceous layer showed 40% higher (p≤ 0.05) crude protein content than the layer at both Leucaena-Mombasa systems; tree fodder was only different (p\u3c 0.05) in in vitro dry matter digestibility, tree fodder from both Leucaena-Mombasa systems was 32% higher (p≤ 0.05) than that of unimproved native range. Ewe-lambs grazing any of the Leucaena-Mombasa systems showed a daily weight gain 1.5 times higher (p\u3c 0.05) than those grazing the unimproved native range. It was concluded that Leucaena-Mombasa system is an option to improve agronomic and animal performances compare to unimproved tropical native range

Building and exploiting a Digital Twin for the management of drinking water distribution networks

[EN] Digital Twins (DTs) are starting to be exploited to improve the management of water distribution systems (WDSs) and, in the future, they will be crucial for decision making. In this paper, the authors propose several requirements that a DT of a water distribution system should accomplish. Developing a DT is a challenge, and a continuous process of adjustments and learning is required. Due to the advantages of having a DT of the WDS always available, during the last years a strategy to build and maintain a DT of the water distribution network of Valencia (Spain) and its Metropolitan Area (1.6 million inhabitants) was developed. This is one of the first DTs built of a water utility, being currently in operation. The great benefits of their use in the daily operation of the system ensure that they will begin to be usual in the most advanced smart cities.Conejos Fuertes, P.; Martínez Alzamora, F.; Hervás-Carot, M.; Alonso Campos, JC. (2020). Building and exploiting a Digital Twin for the management of drinking water distribution networks. Urban Water Journal. 17(8):704-713. https://doi.org/10.1080/1573062X.2020.1771382S704713178Chacón Ramírez, E., Albarrán, J. C., & Cruz Salazar, L. A. (2019). The Control of Water Distribution Systems as a Holonic System. Studies in Computational Intelligence, 352-365. doi:10.1007/978-3-030-27477-1_27Grieves, M., et al. 2015. Virtually Intelligent Product Systems: Digital and Physical Twins. In Complex Systems Engineering: Theory and Practice, edited by S. Flumerfelt, et al., 175–200. American Institute of Aeronautics and Astronautics.Hatchett, S., J. Uber, D. Boccelli, T. Haxton, R. Janke, A. Kramer, A. Matracia, and S. Panguluri. 2011. “Real-Time Distribution System Modeling: Development, Application, and Insights.” Urban Water Management: Challenges and Oppurtunities - 11thInternational Conference on Computing and Control for the Water Industry, CCWI 2011 July.Kartakis, S., Abraham, E., & McCann, J. A. (2015). WaterBox. Proceedings of the 1st ACM International Workshop on Cyber-Physical Systems for Smart Water Networks. doi:10.1145/2738935.2738939Lin, J., Sedigh, S., & Miller, A. (2009). Towards Integrated Simulation of Cyber-Physical Systems: A Case Study on Intelligent Water Distribution. 2009 Eighth IEEE International Conference on Dependable, Autonomic and Secure Computing. doi:10.1109/dasc.2009.140Qi, Q., & Tao, F. (2018). Digital Twin and Big Data Towards Smart Manufacturing and Industry 4.0: 360 Degree Comparison. IEEE Access, 6, 3585-3593. doi:10.1109/access.2018.2793265Alac, M. (2008). Working with Brain Scans. Social Studies of Science, 38(4), 483-508. doi:10.1177/0306312708089715Shi, Y., Xu, J., & Du, W. (2019). Discussion on the New Operation Management Mode of Hydraulic Engineering Based on the Digital Twin Technique. Journal of Physics: Conference Series, 1168, 022044. doi:10.1088/1742-6596/1168/2/022044Tao, F., Zhang, H., Liu, A., & Nee, A. Y. C. (2019). Digital Twin in Industry: State-of-the-Art. IEEE Transactions on Industrial Informatics, 15(4), 2405-2415. doi:10.1109/tii.2018.2873186Tao, F., Cheng, J., Qi, Q., Zhang, M., Zhang, H., & Sui, F. (2017). Digital twin-driven product design, manufacturing and service with big data. The International Journal of Advanced Manufacturing Technology, 94(9-12), 3563-3576. doi:10.1007/s00170-017-0233-1Tao, F., & Qi, Q. (2019). Make more digital twins. Nature, 573(7775), 490-491. doi:10.1038/d41586-019-02849-1Uber, J., S. Hatchett, S. Hooper, D. Boccelli, H. Woo, and R. Janke. 2014. Water Utility Case Study of Real-Time Network Hydaulic and Water Qualilty Modeling Using EPANET-RTX Libraries. EPA 6007R-14/350 Report. Cincinnati, Ohio: Environmental Protection Agency.Wang, Z., Song, H., Watkins, D. W., Ong, K. G., Xue, P., Yang, Q., & Shi, X. (2015). Cyber-physical systems for water sustainability: challenges and opportunities. IEEE Communications Magazine, 53(5), 216-222. doi:10.1109/mcom.2015.710566

Holographic superresolution using spatial light modulator

This paper describes a technique of superresolution using a reflective mode spatial light modulator, a coherent source of light, and a transmission mode object placed in the input plane of an imaging system, in particular we are using for the demonstration a 4f system. The spatial light modulator (SLM) enables for creating tilted plane wave illumination and it also permits adding constant phases of 0, π/2, 3π/2 and π. The angle of illumination created by the SLM is defined according to the dimension of aperture placed at the Fourier plane of 4f optical system. For each defined angle of illumination created by the SLM four holograms corresponding to the transmission mode object are recorded. This system is capable of retrieving phase and amplitude information of the images, corresponding to each impinging illumination. By simply adding these complex images a super resolved image is obtained

The Influence of Host Fruit and Temperature on the Body Size of Adult Ceratitis capitata (Diptera: Tephritidae) under Laboratory and Field conditions

The adult body size of the Mediterranean fruit ßy, Ceratitis capitata (Wiedemann) (Diptera: Tephritidae), varies in natural conditions. Body size is an important Þtness indicator in the Mediterranean fruit ßy;largerindividuals are more competitive at mating and have a greater dispersion capacity and fertility. Both temperature during larval development and host fruit quality have been cited as possible causes for this variation.We studied the inßuence of host fruit and temperature during larval development on adult body size (wing area) in the laboratory, and determined body size variation in Þeld populations of the Mediterannean fruit ßy in eastern Spain. Field ßies measured had two origins: 1) ßies periodically collected throughout the year in Þeld traps from 32 citrus groves, during the period 2003Ð2007; and 2) ßies evolved from different fruit species collected between June and December in 2003 and 2004. In the lab, wing area of male and female adults varied signiÞcantly with temperature during larval development, being larger at the lowest temperature. Adult size also was signiÞcantly different depending on the host fruit in which larvae developed. The size of the ßies captured at the Þeld, either from traps or from fruits, varied seasonally showing a gradual pattern of change along the year. The largest individuals were obtained during winter and early spring and the smallest during late summer. In Þeld conditions, the size of the adult Mediterannean fruit ßy seems apparently more related with air temperature than with host fruit. The implications of this adult size pattern on the biology ofC. capitata and on the application of the sterile insect technique are discussed.We thank Apostolos Pekas for his useful comments on previous versions of the manuscript. This work was supported by the project RTA03-103-C6-3 assigned to F. G. M. from the Ministerio de Educacion y Ciencia of Spain.Navarro Campos, C.; Martínez Ferrer, MT.; Campos, J.; Fibla, JM.; Alcaide, J.; Bargues Desolmes, L.; Marzal Moreno, C.... (2011). The Influence of Host Fruit and Temperature on the Body Size of Adult Ceratitis capitata (Diptera: Tephritidae) under Laboratory and Field conditions. Environmental Entomology. 90(4):931-938. https://doi.org/10.1603/EN10302S931938904Albajes R. Santiago-Alvarez C. 1980. Influencia de la temperatura en el desarrollo de Ceratitis capitata (Diptera: Trypetidae). An. INIA. 13: 183–190.Angilletta, Jr.,, M. J., & Dunham, A. E. (2003). The Temperature‐Size Rule in Ectotherms: Simple Evolutionary Explanations May Not Be General. The American Naturalist, 162(3), 332-342. doi:10.1086/377187Arita L.H. Kaneshiro K.Y. 1988. Body size and differential mating success between males of two populations of the Mediterranean fruit fly. Pac. Sci. 42: 173–177.Atkinson D. 1994. Temperature and organism size: a biological law for ectotherms?. Adv. Ecol. Res. 25: 1–58.Atkinson, D., & Sibly, R. M. (1997). Why are organisms usually bigger in colder environments? Making sense of a life history puzzle. Trends in Ecology & Evolution, 12(6), 235-239. doi:10.1016/s0169-5347(97)01058-6Back E.A. Pemberton C.E. 1918. The mediterranean fruit fly. U.S. Dep. Agric. Bull. 640: 1–43.BLAY, S., & YUVAL, B. (1997). Nutritional correlates of reproductive success of male Mediterranean fruit flies (Diptera: Tephritidae). Animal Behaviour, 54(1), 59-66. doi:10.1006/anbe.1996.0445Bodenheimer F.S. 1951. Citrus entomology in the Middle East. W. Junk. The Hague, Netherlands. 1–663.Calkins C.O. 1984. The importance of understanding fruit fly mating behavior in sterile male release programs (Diptera: Tephritidae). Folia Entomol. Mexicana. 61: 205–213.Carey J.R. 1984. Host-specific demographic studies of the Mediterranean fruit fly, Ceratitis capitata . Ecol. Entomol. 9: 261–270.Chapman R.F. 1998. The insects: structure and function. 4th ed. Cambridge University Press, Cambridge, United Kingdom.Christenson, L. D., & Foote, R. H. (1960). Biology of Fruit Flies. Annual Review of Entomology, 5(1), 171-192. doi:10.1146/annurev.en.05.010160.001131Churchill-Stanland, C., Stanland, R., Wong, T. T. Y., Tanaka, N., McInnis, D. O., & Dowell, R. V. (1986). Size as a Factor in the Mating Propensity of Mediterranean Fruit Flies, Ceratitis capitata (Diptera: Tephritidae), in the Laboratory. Journal of Economic Entomology, 79(3), 614-619. doi:10.1093/jee/79.3.614Danthanarayana W. 1976. Environmentally cued size variation in the light-brown apple moth, Epiphyas postvittana (Walk.) (Tortricidae), and its adaptive value in dispersal. Oecologia. 26: 121–132.Davidowitz G. Nijhout H.F. 2004. The physiological basis of reaction norms: the interaction among growth rate, the duration of growth and body size. Integr. Comp. Biol. 144: 443–449.Davidowitz G.L. D'Amico J. Nijhout H.F. 2004. The effects of environmental variation on a mechanism that controls insect body size. Evol. Ecol. Res. 6: 49–62.Debouzie D. 1977. Etude de la competition larvaire chez Ceratitis capitata (Dyptère, Trypetidae). Arch. Zool. Exp. Gen. 118: 315–334.Diamond, S. E., & Kingsolver, J. G. (2010). Environmental Dependence of Thermal Reaction Norms: Host Plant Quality Can Reverse the Temperature‐Size Rule. The American Naturalist, 175(1), 1-10. doi:10.1086/648602Eberhard W. 2000. Sexual behavior and sexual selection in the Mediterranean fruit fly, Ceratitis capitata (Dacinae: Ceratitidini) In . Aluja M. Norrbom A. Fruit Flies (Tephritidae): Phylogeny and Evolution of Behavior. CRC, Boca Raton, FL.Edgar, B. A. (2006). How flies get their size: genetics meets physiology. Nature Reviews Genetics, 7(12), 907-916. doi:10.1038/nrg1989Fletcher B.S. 1989a. Movements of tephritid fruit flies, pp. 209–219 In . Robinson A.S. Hooper G. World crop pests, vol. 3B. Fruits flies, their biology, natural enemies and control. Elsevier, Amsterdam.Fletcher B.S. 1989b. Life History Strategies of Tephritid fruit flies, pp. 195–208 In . Robinson A.S. Hooper G. World crop pests, vol. 3B. Fruits flies, their biology, natural enemies and control. Elsevier, Amsterdam.Gilchrist A.S. Crisafulli D.C. 2006. Using variation in wing shape to distinguish between wild and mass-reared individuals of Queensland fruit fly, Bactrocera tryoni . Entomol. Exp. Appl. 119: 175–178.Gilchrist A.S. Partridge L. 2001. The contrasting genetic architecture of wing size and shape in Drosophila melanogaster . Heredity. 86: 144–152.Gómez Clemente F. Planes S. 1952. Algunas notas sobre la ecología de Ceratitis capitata en el Levante español sobre naranjos. Bol. Patol. Veg. Entomol. Agric. 19: 37–48.Hasson O. Rossler Y. 2002. Character-specific homeostasis dominates fluctuating asymmetries in the medfly (Diptera: Tephritidae). Fla. Entomol. 85: 73–82.HOFFMANN, A. A., RATNA, E., SGRÒ, C. M., BARTON, M., BLACKET, M., HALLAS, R., … WEEKS, A. R. (2007). Antagonistic selection between adult thorax and wing size in field released Drosophila melanogaster independent of thermal conditions. Journal of Evolutionary Biology, 20(6), 2219-2227. doi:10.1111/j.1420-9101.2007.01422.xInglesfield C. 1982. Larval hosts, adult body size and population quality in Ceratitis capitata Wied.: a laboratory study. Annali della Facoltà di Agraria dell'Università di Sassari. 28: 25–39.Israely, N., Yuval, B., Kitron, U., & Nestel, D. (1997). Population Fluctuations of Adult Mediterranean Fruit Flies (Diptera: Tephritidae) in a Mediterranean Heterogeneous Agricultural Region. Environmental Entomology, 26(6), 1263-1269. doi:10.1093/ee/26.6.1263Joaquim-Bravo I.S. Guimaraes A.N. Magalhaes T.C. Nascimento A.S. 2010. Performance of Ceratitis capitata (Wiedemann) (Diptera: Tephritidae) in fruits: comparison of two laboratory populations. Neotrop. Entomol. 39: 9–14.Kaspi, R., Taylor, P. W., & Yuval, B. (2000). Diet and size influence sexual advertisement and copulatory success of males in Mediterranean fruit fly leks. Ecological Entomology, 25(3), 279-284. doi:10.1046/j.1365-2311.2000.00266.xKaspi R. Mossinson S. Drezner T. Kamensky B. Yuval B. 2002. Effects of larval diet on development rates and reproductive maturation of male and female Mediterranean fruit flies. Physiol. Entomol. 27: 29–38.Kingsolver J.G. Shlichta J.G. Ragland G.J. Massie K.R. 2006. Thermal reaction norms for caterpillar growth depend on diet. Evol. Ecol. Res. 8: 703–715.Krainacker, D. A., Carey, J. R., & Vargas, R. I. (1987). Effect of larval host on life history traits of the mediterranean fruit fly, Ceratitis capitata. Oecologia, 73(4), 583-590. doi:10.1007/bf00379420Krainacker, D. A., Carey, J. R., & Vargas, R. I. (1989). Size-Specific Survival and Fecundity for Laboratory Strains of Two Tephritid (Diptera: Tephritidae) Species: Implications for Mass Rearing. Journal of Economic Entomology, 82(1), 104-108. doi:10.1093/jee/82.1.104Liquido N.J. Shinoda L.A. Cunningham R.T. 1991. Host plants of Mediterranean fruit fly: an annotated world review. Ann. Entomol. Soc. Am. 77: 1–52.Martínez-Ferrer M.T. Campos J.M. Fibla J.M. 2006. Population dynamics of Ceratitis capitata on citrus in northeastern Spain: influence of adjacent host fruit trees. IOBC-WPRS Bull. 29: 77–84.Martínez-Ferrer M.T. Navarro C. Campos J.M. Marzal C. Fibla J.M. Bargues L. Garcia-Mari F. 2010. Seasonal and annual trends in field populations of Mediterranean fruit fly, Ceratitis capitata, in Mediterranean citrus groves: comparison of two geographic areas in eastern Spain. Spanish. J. Agric. Res. 8: 757–765.Weitzman, J. (2006). Journal of Biology, 5(1), 1. doi:10.1186/jbiol33PAPADOPOULOS, N. T., CAREY, J. R., LIEDO, P., MÜLLER, H.-G., & SENTÜRK, D. (2009). Virgin females compete for mates in the male lekking speciesCeratitis capitata. Physiological Entomology, 34(3), 238-245. doi:10.1111/j.1365-3032.2009.00680.xProkopy, R. J., & Hendrichs, J. (1979). Mating Behavior of Ceratitis capitata1 on a Field-Caged Host Tree. Annals of the Entomological Society of America, 72(5), 642-648. doi:10.1093/aesa/72.5.642Ray, C. (1960). The application of Bergmann’s and Allen’s rules to the poikilotherms. Journal of Morphology, 106(1), 85-108. doi:10.1002/jmor.1051060104Rivnay E. 1950. The Mediterranean fruit fly in Israel. Bull. Entomol. Res. 41: 321–341.Sankarperumal, G., & Pandian, T. J. (1991). Effect of temperature andChlorelladensity on growth and metamorphosis ofChironomus circumdatus(Kieffer) (Diptera). Aquatic Insects, 13(3), 167-177. doi:10.1080/01650429109361438Santaballa E. Laborda R. Bargues L. 2001. Tratamientos de cuarentena: evolución y supervivencia de la mosca de las frutas Ceratitis capitata (Wiedemann) sobre cítricos. Levante Agric. 358: 405–412.Sharp, J. L., Boller, E. F., & Chambers, D. L. (1983). Selection for Flight Propensity of Laboratory and Wild Strains of Anastrepha suspensa and Ceratitis capitata (Diptera: Tephritidae)1. Journal of Economic Entomology, 76(2), 302-305. doi:10.1093/jee/76.2.302Sigurjonsdottir H. 1984. Food competition among Scatophaga stercoraria larvae with emphasis on its effects on reproductive success. Ecol. Entomol. 9: 81–90.Sivinski J. Aluja M. Dodson G.N. Freidberg A. Headrick D.H. Kaneshiro K.Y. Landolt P. 2000. Topics in the evolution of sexual behavior in the Tephritidae, pp. 751–792 In . Aluja M. Norrbom A. Fruit Flies (Tephritidae): Phylogeny and Evolution of Behavior. CRC, Boca Raton, FL.Stamp, N. E. (1990). Growth versus molting time of caterpillars as a function of temperature, nutrient concentration and the phenolic rutin. 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Feeding habits of Ceratitis capitata (Diptera: Tephritidae): can larvae recognize a nutritionally effective diet?. J. Insect Physiol. 33: 349–353

Methodology for flushing pressurised irrigation networks for fertigation and operation maintenance purposes

[EN] Pressurised irrigation networks with a certain degree of automation allow centralized fertigation and maintenance operations such as cleaning subunits and preventing the proliferation of invasive species such as zebra mussels. Until now, there is no methodology that guarantees the total cleaning of the network of a substance in the shortest possible time. In the same way, it does not exist to guarantee reaching all consumption points with a certain concentration of a substance, injecting the minimum possible amount. For that purpose, a general novel methodology has been developed that makes use of the network¿s hydraulic model and parallel multi-objective genetic algorithms to flush the network of a certain substance or to get it to all consumption points in the shortest possible time and supplying a minimum volume. This method assumes that the available pressure at the source is always over a minimum value. The arrival times to the consumption points are minimized and the injected volume is reduced to the minimum of replacement, that is, the volume of the network pipes. The methodology applied to the study case allowed the entire network to be flushed in a minimum time of 2.46 h. On a normal irrigation day, without making any changes to the irrigation schedule the time to completely flush the network is 11.76 h. Furthermore, the injected volume differs greatly from the total volume of the pipes.This study has been partially supported by the ADAPTAMED project (RTI2018-101483-B-I00), funded by the Ministerio de Economia y Competitividad (MINECO) of Spain and with EU FEDER funds.Jiménez Bello, MA.; Alonso Campos, JC.; Manzano Juarez, J.; Martínez Alzamora, F. (2021). Methodology for flushing pressurised irrigation networks for fertigation and operation maintenance purposes. Irrigation Science. 39(3):375-384. https://doi.org/10.1007/s00271-021-00724-437538439

Ultracold O2O_2+O2O_2 collisions in a magnetic field: on the role of the potential energy surface

The collision dynamics of $^{17}O_2(^3\Sigma_g^-) +^{17}O_2(^3\Sigma_g^-)$ in the presence of a magnetic field is studied within the close-coupling formalism in the range between 10 nK and 50 mK. A recent global {\em ab initio} potential energy surface (PES) is employed and its effect on the dynamics is analyzed and compared with previous calculations where an experimentally derived PES was used [New J. Phys {\bf 11}, 055021 (2009)]. In contrast to the results using the older PES, magnetic field dependence of the low-field-seeking state in the ultracold regime is characterized by quite a large background scattering length, $a_{bg}$, and, in addition, cross sections exhibit broad and pronounced Feshbach resonances. The marked resonance structure is somewhat surprising considering the influence of inelastic scattering, but it can be explained by resorting to the analytical van der Waals theory, where the short range amplitude of the entrance channel wave function is enhanced by the large $a_{bg}$. This strong sensitivity to the short range of the {\em ab initio} PES persists up to relatively high energies (10 mK). After this study and despite quantitative predictions are very difficult, it can be concluded that the ratio between elastic and spin relaxation scattering is generally small, except for magnetic fields which are either low or close to an asymmetric Fano-type resonance. Some general trends found here, such as a large density of quasibound states and a propensity towards large scattering lengths, could be also characteristic of other anisotropic molecule-molecule systems.Comment: 24 pages, 8 figure