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Reduction of dietary crude protein and feed form:Impact on broiler litter quality,ammonia concentrations,excreta composition,performance,welfare,and meat quality

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Animal Nutrition 2022年第2期9卷 291-303页

作者： Madri Brink geert p.j.janssens peter Demeyer Ozer Bagci Evelyne Delezie Flanders Research Institute for Agriculture Fisheries and Food(ILVO)Animal Sciences UnitScheldeweg 689090 MelleBelgium Department of Nutrition Genetics and EthologyGhent UniversityHeidestraat 199820 MerelbekeBelgium Flanders Research Institute for Agriculture Fisheries and Food(ILVO)Agricultural Engineering UnitBurg.Van Gansberghelaan 1159820 MerelbekeBelgium Department of Mechanical Engineering Eindhoven University of Technology5600 MB-EindhovenNetherlands.

Nitrogen(N)excreted by poultry is converted to ammonia(NH3),presenting an environmental risk and a health risk to the farmer and animals.A study was performed to investigate the effect of reduced Cp and feed form on broiler performance and welfare,meat and litter quality,N utilization,and NH3 concentrations at litter level.A total of 2,232 Ross 308 male broilers was divided into 6 treatments and 6 replicates,which was fed diets in both pellet and mash forms with different Cp levels of 205.0 g/kg(H,high),187.5 g/kg(M,intermediate)and 175.0 g/kg(L,low)in the grower phase and 195.0 g/kg(H),180.0 g/kg(M)and 165.6 g/kg(L)in the finisher *** amino acids(AA)were supplemented to maintain digestible AA-to-digestible lysine *** dietary Cp content to 187.5 g/kg in the grower phase and 180.0 g/kg in the finisher phase reduced NH3 concentrations at litter level(pp had no additional *** treatments had better litter qualities and lower incidences of foot and hock lesions than pellet treatments at d 38(pp had lower incidence of foot lesions at d 38(ppelleted diets had higher ADFI,ADG,and final BW,improved feed conversion ratio(FCR),and heavier carcasses(pproduction period of 39 *** could not be maintained when birds were fed L Cp pelleted *** study demonstrated that,with the supplementation of AA to meet requirements,the concentration of dietary Cp can be reduced to 187.5 and 180.0 g/kg in the grower and finisher phases respectively,without impairing broiler performance,meat yield and *** diets were favorable when considering the overall litter quality and welfare of the ***,they could not maintain the same broiler performance and slaughter yield as pelleted *** from the present study may assist the poultry sector towards a socially acceptable lowemission

关键词： Broiler Ammonia Crude protein Feed form performance

Reproduction,Development,and Growth Response to Captive Diets in the Shangcheng Stout Salamander,pachyhynobius shangchengensis(Amphibia,Urodela,Hynobiidae)

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Asian Herpetological Research 2012年第3期3卷 192-197页

作者： Frank pASMANS geert p.j.janssens Max SpARREBOOM3 jianping jIANG Kanto NISHIKAWA Department of pathology Bacteriology and Avian DiseasesFaculty of Veterinary MedicineGhent University Salisburylaan 1339820 MerelbekeBelgium Animal Nutrition Laboratory Faculty of Veterinary MedicineGhent University Salisburylaan 1339820 MerelbekeBelgium Netherlands Centre for Biodiversity Naturalis p.O.Box 9517 NL-2300 RA LeidenThe Netherlands Chengdu Institute of Biology Chinese Academy of Sciences Graduate School of Human and Environmental Studies Kyoto UniversityYoshida-nihonmatsu-cho Sakyo606-8501 KyotoJapan

The Shangcheng stout salamander(pachyhynobius shangchengensis) is a poorly known stream dwelling hynobiid salamander from China. We studied the reproduction, development and growth response of the salamander to different diets in captivity. Two females each produced two unique, striated egg sacs, with each containing 18 and 20, and 22 and 32 white eggs with an average diameter of 3.3 mm. Hatchlings(n = 27) had front- and hind-limb buds with interdigit membranes and a large yolk sac, and developed cornified finger and toe tips during further development. Metamorphosis occurred between d 441 and d 454 after hatching at an average total length of 94.8 mm(n = 21). These reproductive and developmental traits fit in well with the ancestral state reconstruction in hynobiids. If corrected for dry mass, feed conversion ratios obtained by feeding bloodworms(Chironomidae) to p. shangchengensis larvae and mealworms(Tenebrio molitor) to postmetamorphs, were very low(0.33 and 0.34 respectively), equaling a very high mass conversion efficiency.

关键词： pachyhynobius shangchengensis husbandry reproduction nutrition development

Supplementing oat hulls to the diet of suckling piglets altered their intestinal tract and colonic microbiota development

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Animal Nutrition 2023年第1期12卷 284-296页

作者： Hubèrt M.j.van Hees Koen Chiers Leo A.den Hartog Theo A.T.G.van Kempen Dominiek Maes Sam Millet geert p.j.janssens Department of Veterinary and Biosciences Ghent UniversityMerelbekeBelgium Trouw Nutrition Research and Development Amersfoortthe Netherlands Department of pathology Ghent UniversityMerelbekeBelgium Animal Nutrition Wageningen University and ResearchWageningenthe Netherlands Department of Animal Science North Carolina State UniversityRaleighNCUSA Department of Reproduction Obstetrics and Herd HealthGhent UniversityMerelbekeBelgium ILVO(Flanders Research Institute for Agriculture Fisheries and Food)MelleBelgium

Current study evaluated the effect of a fine and coarsely ground insoluble dietary fibre source on the gastrointestinal development of suckling *** hulls(OH)were selected as a model feedstuff,rich in cellulose,lignin,and insoluble dietary *** experimental supplemental diets were formulated:a finely ground,low fibre and nutrient dense diet served as control(CON).For the 2 high fibre diets,15%heat-treated starch in CON was exchanged with OH,either finely(OH-f)or coarsely ground(OH-c).Litters of 10 primi-and multiparous sows(mean litter size 14.6±0.84)were *** a litter,experimental diets were allotted to triplets of 4 *** approximately 12 d of age,piglets’individual feed intakes were recorded 2 times per day when separated from their dam for 70 *** could suckle with their dam for the remainder of the *** d 24 and 25,from the total pool of 120 piglets,seven healthy well-eating piglets per treatment were selected for post-mortem evaluation,resulting in 14 replicates per *** of OH-c and OH-f did not impede clinical health and production performance of *** full stomach weights tended to be greater for OH-c compared to OH-f whereas CON was intermediate(p=0.083).Supplementing OH significantly increased ileal villus height and caecal dry matter concentration(pproteobacteria count and proportion(ppecifically increased full gastrointestinal tract weight and caecum contents weight compared to piglets fed CON and ***,OH-c reduced colonic crypt depth when compared to OH-f(p=0.018).In conclusion,supplementing OH to a diet for suckling piglets exerted subtle developmental effects on gastrointestinal morphology and colonic microbial *** effects were largely independent from the particle size of the OH.

关键词： Oat hull Insoluble fibre Gastrointestinal development Suckling piglet

Adhesion performance of alkali-activated material for 3-dimensional printing of tunnel linings at different temperatures

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Frontiers of Structural and Civil Engineering 2024年第1期18卷 66-79页

作者： Yaxin TAO Xiaodi DAI geert de SCHUTTER Kim Van TITTELBOOM Department of Structural Engineering and Building Materials Ghent UniversityGhent 9052Belgium

Robotic-based technologies such as automated spraying or extrusion-based 3-dimensional(3D)concrete printing can be used to build tunnel linings,aiming at reducing labor and mitigating the associated safety issues,especially in the high-geothermal ***-based 3D concrete printing(3DCp)has additional advantages over automated sprayings,such as improved surface quality and no ***,the effect of different temperatures on the adhesion performance of 3D-printed materials for tunnel linings has not been *** study developed several alkali-activated slag mixtures with different activator modulus ratios to avoid the excessive use of portland cement and enhance sustainability of 3D printable *** thermal responses of the mixtures at different temperatures of 20 and 40℃ were *** adhesion strength of the alkali-activated material was evaluated for both early and later ***,the structural evolution of the material exposed to different temperatures was *** was followed by microstructure *** indicate that elevated temperatures accelerate material reactions,resulting in improved early-age adhesion ***,higher temperatures contribute to the development of a denser microstructure and enhanced mechanical strength in the hardened stage,particularly in mixtures with higher silicate content.

关键词： alkali-activated material 3DCp tunnel lining high-geothermal environment adhesion

Combined peakreductionandself-consumptionusingproximalpolicy optimisation

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Energy and AI 2024年第2期16卷 24-31页

作者： Thijs peirelinck Chris Hermans Fred Spiessens geert Deconinck ESAT KU LeuvenKasteelpark Arenberg 10 bus 24453001 LeuvenBelgium AMO Flemish Institute for Technological Research(VITO)Boeretang 2002400 Mol Belgium AMO EnergyVilleThor Park 83103600 GenkBelgium

Residential demand response programs aim to activate demand flexibility at the household *** recent years,reinforcement learning(RL)has gained significant attention for these type of applications.A major challenge of RL algorithms is data *** RL algorithms,such as proximal policy optimisation(ppO),have tried to increase data *** tionally,combining RL with transfer learning has been proposed in an effort to mitigate this *** this work,we further improve upon state-of-the-art transfer learning performance by incorporating demand response domain knowledge into the learning *** evaluate our approach on a demand response use case where peak shaving and self-consumption is incentivised by means of a capacity *** show our adapted version of ppO,combined with transfer learming,reduces cost by 14.51%compared to a regular hysteresis controller and by 6.68%compared to traditional ppO.

关键词： Demand response Reinforcement learning Electric water heater peak shaving Transfer learning

The shear strength of the interface between artificial rock and printed concrete at super-early ages

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Frontiers of Structural and Civil Engineering 2024年第1期18卷 51-65页

作者： Yong Yuan Xiaoyun Wang jiao-Long Zhang Yaxin Tao Kim Van Tittelboom Luc Taerwe geert De Schutter College of Civil Engineering Tongji UniversityShanghai 200092China State Key Laboratory of Disaster Reduction in Civil Engineering Tongji UniversityShanghai 200092China Belgium-China joint Laboratory for Industrialized Construction Tongji UniversityShanghai 200092China Magnel-Vandepitte Laboratory for Structural Engineering and Building Materials Ghent UniversityGhent 9052Belgium

3D concrete printing has the potential to replace shotcrete for construction of linings of tunnels in hard *** shear strength of the interface between rock and printed concrete is vital,especially at super-early ***,traditional methods for testing the shear strength of the interface,e.g.,the direct shear test,are time-consuming and result in a high variability for fast-hardening printed *** this paper,a new fast bond shear test is *** test can be completed in 1 min,with another 2 min for preparing the next *** influence of the matrix composition,the age of the printed matrices,and the interface roughness of the artificial rock substrate on the shear strength of the interface was experimentally *** tests were conducted at the age of the matrices at the 1st,the 4th,the 8th,the 16th,the 32nd,and the 64th min after its final setting.A dimensionless formula was established to calculate the shear strength,accounting for the age of the printed matrices,the interface roughness,and the shear failure *** was validated by comparing the calculated results and the experimental results of one group of samples.

关键词： rock tunnel printed concrete interface fast bond shear test shear strength

Enabling low-cost decentralized power reserves adopting carbon dioxide for green methane exchange in stabilized clathrate adsorbent

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journal of Energy Chemistry 2024年第10期97卷 438-443,I0009页

作者： Lucas Hanssens Maarten Houlleberghs C.Vinod Chandran geert Watson Sambhu Radhakrishnan pascal Van Der Voort joeri F.M.Denayer Christine E.A.Kirschhock johan A.Martens Eric Breynaert Centre for Surface Chemistry and Catalysis-Characterization and Application Team(COK-KAT) 3001 LeuvenBelgium NMR/X-Ray platform for Convergence Research(NMRCoRe) 3001 LeuvenBelgium Centre for Ordered Materials Organometallics and Catalysis(COMOC)Department of ChemistryGhent University9000 GhentBelgium Department of Chemical Engineering Vrije Universiteit Brussel1050 BrusselBelgium

*** circular methane energy systems In recent decades,methane-based energy systems have rapidly gained traction across the globe because of the increasing availability of low-cost methane production ***,fossil methane... 详细信息

关键词： Long duration energy storage Green methane Carbon neutrality Confined clathrate hydrates CH_(4)/CO_(2) exchange Direct gas exchange

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智能交通系统中行为交通序列的优化与仿真

清华大学学报（自然科学版） 2006年第Z1期46卷 1052-1057页

作者：于岚 Davy janssens 陈国青 geert Wets 清华大学经济管理学院 Universiteit Hasselt Campus DiepenbeekAgoralaan-Gebouw DB-3590DiepenbeekBelgium

城市智能交通体系属于空间信息系统,致力于提高交通效率、改善交通安全等。在已知个体行为交通序列的前提下,一项有意义的工作是观察个体如何有效地统筹安排其日常生活中行为的时间规划和路径选择,这将有助于对交通状况和需求的预测。... 详细信息

城市智能交通体系属于空间信息系统,致力于提高交通效率、改善交通安全等。在已知个体行为交通序列的前提下,一项有意义的工作是观察个体如何有效地统筹安排其日常生活中行为的时间规划和路径选择,这将有助于对交通状况和需求的预测。该文在增强学习的框架下对上述的行为交通序列进行了优化和仿真。实验结果表明,增强学习不仅可以获得最佳的策略,而且在个人由于一些不可预测的事件而被迫偏离原来的最优安排时,仍可以依据学习过程中积累的信息明智地逐步调整过来。

关键词：智能交通系统增强学习仿真

A hillslope version of the revised Morgan,Morgan and Finney water erosion model

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International Soil and Water Conservation Research 2021年第3期9卷 319-332页

作者： geert Sterk Department of physical Geography Utrecht UniversityPO Box 80.115NL-3508 TCUtrechtthe Netherlands

The revised Morgan,Morgan and Finney(rMMF)water erosion model calculates annual surface runoff and soil loss from field-sized *** original version of the rMMF is neither suited to calculate water erosion along irregular hillslopes,nor capable to allow infiltration of once generated surface runoff at places where the runoff speed slows down,and infiltration could occur under natural *** aim of this article is to describe a new hillslope version of the rMMF model that allows infiltration of surface runoff,and to show examples of soil erosion modelling along real and hypothetical *** new hillslope version(hMMF)splits the entire hillslope into a number of sections that have individual properties,such as slope angle,slope length,soil properties and vegetation *** surface runoff along the slope is calculated by summing the volume of surface runoff generated in a particular section with the surface runoff coming from the immediate upsiope *** related sediment transport is calculated for each section using the calculated detachment for the section,the sediment coming from the upsiope section and the transport capacity.A new variable is introduced to account for infiltration of surface runoff and allows simulating the effects of soil and water conservation structures on water *** model was tested using measured data from plots in Africa,Asia,the US and Europe,as well as for a surveyed hillslope in Tunisia(Barbara watershed).Overall,the performance of the hMMF was reasonable for surface runoff and poor for soil loss when recommended input variable values are *** of the model resulted in a good performance,which shows the capability of the hMMF model to reproduce measured surface runoff and erosion *** addition,realistic water erosion patterns on hillslopes with soil and water conservation can be simulated.

关键词： Water erosion modelling Morgan-morgan-finney model Hillslope Surface runoff Sediment transport Soil loss Soil and water conservation