top

  Info

  • Utilizzare la checkbox di selezione a fianco di ciascun documento per attivare le funzionalità di stampa, invio email, download nei formati disponibili del (i) record.

  Info

  • Utilizzare questo link per rimuovere la selezione effettuata.
Advances in Food and Non-Food Biomass Production, Processing and Use in Sub-Saharan Africa: Towards a Basis for a Regional Bioeconomy
Advances in Food and Non-Food Biomass Production, Processing and Use in Sub-Saharan Africa: Towards a Basis for a Regional Bioeconomy
Autore Schmitt Christine B
Pubbl/distr/stampa MDPI - Multidisciplinary Digital Publishing Institute, 2020
Descrizione fisica 1 electronic resource (446 p.)
Soggetto non controllato value addition
cassava variants
Biomass
pollution
welfare
biomass scenarios
equity
bio-based
husk
bioproductivity
transdisciplinary research
groundnut
land-use
mucilage
fiber
corncob
neighborhoods
mixed methods
crop residue
impact
Ghana
germination
bamboo
rural development
multipurpose tree on farmland
knowledge-based bioeconomy
multi-functionality
access
value chain
availability
development policy
biomass utilization
homegarden
adoption
primary sector
cluster analysis
Nigeria
food bearing
innovation
CGE
value web
biomass
bioenergy
comparative advantage
maize
Policy Analysis Matrix
basic needs
multistorey coffee system
collaboration
solid waste
traditional agroforestry
amylose
edible
pulp
governance
intensification options
parchment
green economy
farmland
value-added
renewable energy
endogenous switching regression
smallholders
food and non-food benefit
crop model
carotenoids retention
family farming
contract farming
contract design
richness
development
biological goods
soil amendment
Biomass-based value web
sustainability
deforestation
sustainable development
typology
cassava smallholders
push–pull technology
circular economy
methane
Ethiopia
willingness to pay
cassava farmers
biochar
Yayu Biosphere Reserve
bioeconomy
bio-based economy
food and non-food
self-purging pyrolysis
productivity
demand-driven research
cassava
leadership
probit
intragenerational justice
fairness
productivity differentials
technology
high-tech bioeconomy
cassava processors
intensity
phytotoxicity
global biomass
food security
cassava processing
yellow cassava
plantain residues
fertilizer-yield-response
ISBN 3-03928-669-2
Formato Materiale a stampa
Livello bibliografico Monografia
Lingua di pubblicazione eng
Altri titoli varianti Advances in Food and Non-Food Biomass Production, Processing and Use in Sub-Saharan Africa
Record Nr. UNINA-9910674007903321
Schmitt Christine B  
MDPI - Multidisciplinary Digital Publishing Institute, 2020
Materiale a stampa
Lo trovi qui: Univ. Federico II
Opac: Controlla la disponibilità qui
Advances in Remote Sensing for Global Forest Monitoring
Advances in Remote Sensing for Global Forest Monitoring
Autore Tomppo Erkki
Pubbl/distr/stampa Basel, Switzerland, : MDPI - Multidisciplinary Digital Publishing Institute, 2021
Descrizione fisica 1 electronic resource (352 p.)
Soggetto topico Research & information: general
Environmental economics
Soggetto non controllato forest structure change
EBLUP
small area estimation
multitemporal LiDAR and stand-level estimates
forest cover
Sentinel-1
Sentinel-2
data fusion
machine-learning
Germany
South Africa
temperate forest
savanna
classification
Sentinel 2
land use land cover
improved k-NN
logistic regression
random forest
support vector machine
statistical estimator
IPCC good practice guidelines
activity data
emissions factor
removals factor
Picea crassifolia Kom
compatible equation
nonlinear seemingly unrelated regression
error-in-variable modeling
leave-one-out cross-validation
digital surface model
digital terrain model
canopy height model
constrained neighbor interpolation
ordinary neighbor interpolation
point cloud density
stereo imagery
remotely sensed LAI
field measured LAI
validation
magnitude
uncertainty
temporal dynamics
state space models
forest disturbance mapping
near real-time monitoring
CUSUM
NRT monitoring
deforestation
degradation
tropical forest
tropical peat
forest type
deep learning
FCN8s
CRFasRNN
GF2
dual-FCN8s
random forests
error propagation
bootstrapping
Landsat
LiDAR
La Rioja
forest area change
data assessment
uncertainty evaluation
inconsistency
forest monitoring
drought
time series satellite data
Bowen ratio
carbon flux
boreal forest
windstorm damage
synthetic aperture radar
C-band
genetic algorithm
multinomial logistic regression
Formato Materiale a stampa
Livello bibliografico Monografia
Lingua di pubblicazione eng
Record Nr. UNINA-9910557338103321
Tomppo Erkki  
Basel, Switzerland, : MDPI - Multidisciplinary Digital Publishing Institute, 2021
Materiale a stampa
Lo trovi qui: Univ. Federico II
Opac: Controlla la disponibilità qui
Agroforestry-Based Ecosystem Services
Agroforestry-Based Ecosystem Services
Autore van Noordwijk Meine
Pubbl/distr/stampa Basel, Switzerland, : MDPI - Multidisciplinary Digital Publishing Institute, 2021
Descrizione fisica 1 electronic resource (476 p.)
Soggetto topico Research & information: general
Soggetto non controllato carbon storage
cacao agroforestry
farmer tree preference
utility value
entrainment
erosion
forest conversion
overland flow
soil macroporosity
throughfall
water balance
boundary work
ecohydrology
forest-water-people nexus
landscape approach
participatory methods
scenario evaluation
social-ecological systems
tropical forests
assisted natural regeneration (ANR)
co-investment
ecosystem services
environmental stewardship
equity
forest and landscape restoration (FLR)
rights-based approach
tree planting
water
coffee
fruit trees
index of root anchoring
slope stability
soil shear strength
root length density
root tensile strength
agroforestry
carbon sequestration
climate change mitigation
grazing management
land restoration
nationally determined contribution
silvopastoral
tree cover
cocoa agroforestry
climate adaptation
soil restoration
soil organic carbon
soil macro-porosity
soil water availability
inceptisols
Fraxinus dimorpha
soil chemical characteristics
mycorrhizal attributes
traditional ecological knowledge
anastomosis
agroforest
silvopasture
economics
financial analysis
carbon payment
Peru
innovation transfer
trimming
intention
participatory and integrative research-extension
stakeholders
adaptation
Kisumu
Bungoma
payment for ecosystem services
village savings and loan associations
fruit tree-based agroforestry
economic benefits
farmer perspectives
resource competition
systems improvement
uptake and expansion
cost-benefit analysis
landscape restoration
global
stocktake
agroforestry coffee
shade tree species
pairwise ranking
Vietnam
trees on farm
options by context
on-farm planned comparison
tree seedling survival
agriculture sector
cost efficiency
land suitability
potential expansion areas
representative concentration pathway
cocoa
Java
livelihoods
rural-urban
remittances
returning migrants
Sumatra
Sulawesi
certification
deforestation
palm oil
forest classification
Jambi
legality
independent smallholders
agroforestry concessions
West Kalimantan
land-use change
belowground biodiversity
soil engineers
Pontoscolex corethrurus
natural habitats
planted forest
artesian wells
Oryza
paddy cultivation
restoration
rodents
sustainable intensification
Mount Bromo-Tengger
coinvestment
instrumental values
landscape
relational values
stewardship
sustainable development goals (SDGs)
trees
Formato Materiale a stampa
Livello bibliografico Monografia
Lingua di pubblicazione eng
Record Nr. UNINA-9910557429103321
van Noordwijk Meine  
Basel, Switzerland, : MDPI - Multidisciplinary Digital Publishing Institute, 2021
Materiale a stampa
Lo trovi qui: Univ. Federico II
Opac: Controlla la disponibilità qui
Among African apes [[electronic resource] ] : stories and photos from the field / / edited by Martha M. Robbins and Christophe Boesch
Among African apes [[electronic resource] ] : stories and photos from the field / / edited by Martha M. Robbins and Christophe Boesch
Pubbl/distr/stampa Berkeley, : University of California Press, c2011
Descrizione fisica 1 online resource (201 p.)
Disciplina 599.88096
Altri autori (Persone) RobbinsMartha M. <1967->
BoeschChristophe
Soggetto topico Apes - Africa
Apes - Research - Africa
Apes - Conservation
Rare mammals - Africa
Soggetto non controllato africa
african animals
african apes
animal behavior
apes
bonobos
bwindi impenetrable national park
central africa
chimpanzees
conservation
cote divoire
deforestation
disease
ecotourism
endangered animals
environment
environmentalism
extinction
field research
forests
gabon
gorillas
great apes
ivindo national park
jungles
life sciences
nature photography
nature preserve
nature reserve
nature
nonfiction
poaching
primates
primatology
science
tai national park
uganda
wild apes
wildlife
zoology
ISBN 1-283-27793-X
9786613277930
0-520-94883-1
Formato Materiale a stampa
Livello bibliografico Monografia
Lingua di pubblicazione eng
Nota di contenuto Frontmatter -- Contents -- Illustrations -- Acknowledgments -- Introduction: Who, What, Where, and Why -- ONE: Discovering Apes -- TWO: Life and Death in the Forest Blood -- THREE: Encounters with Bili Chimpanzees in the Undisturbed Gangu Forest -- FOUR: Is Blood Thicker Than Water -- FIVE: Our Cousins in the Forest - or Bushmeat? -- SIX: Discovering Chimpanzee Traditions -- SEVEN: Keeping It in the Family. Tribal Warfare between Chimpanzee Communities -- EIGHT: Winona's Search for the Right Silverback. Insights into Female Strategies at a Natural Rain Forest Clearing in Northern Congo -- NINE: The Long Road to Habituation. A Window into the Lives of Gorillas -- TEN: Among Silverbacks -- ELEVEN: The Diversity of the Apes What Is the Future? -- Contributors -- Plate Credits -- Index
Record Nr. UNINA-9910781375603321
Berkeley, : University of California Press, c2011
Materiale a stampa
Lo trovi qui: Univ. Federico II
Opac: Controlla la disponibilità qui
Amphibian declines [[electronic resource] ] : a United States' response to the global phenomenon / / edited by Michael J. Lannoo
Amphibian declines [[electronic resource] ] : a United States' response to the global phenomenon / / edited by Michael J. Lannoo
Pubbl/distr/stampa Berkeley, : University of California Press, 2005
Descrizione fisica 1 online resource (1117 p.)
Disciplina 333.95/78
Altri autori (Persone) LannooMichael J
Soggetto topico Amphibian declines
Amphibian declines - United States
Soggetto non controllato adenocarcinoma
agriculture
amphibians
animal populations
biodiversity
biology
climate change
conservation
deforestation
disease
ecology
environment
environmentalism
frogs
genetics
global warming
habitat
lakes
malformation
malformed frogs
minnesota
natural sciences
nature
nonfiction
northern cricket frogs
overwintering
parasites
pesticides
pollution
population declines
radiation
risk factors
rivers
salamander
science
ultraviolet
wetlands
wild animals
woodland salamanders
xenobiotics
zoology
ISBN 1-282-75915-9
9786612759154
0-520-92943-8
1-4175-9332-6
Formato Materiale a stampa
Livello bibliografico Monografia
Lingua di pubblicazione eng
Nota di contenuto Amphibian Declines -- Front matter -- Contents -- Acknowledgments -- Advisory Board -- Contributors -- Preface -- Part One. Conservation Essays -- Introduction -- 1. Diverse Phenomena Influencing Amphibian Population Declines -- 2. Why Are Some Species In Decline But Others Not? -- 3. Philosophy, Value Judgments, And Declining Amphibians -- 4. Embracing Human Diversity In Conservation -- 5. Declining Amphibian Populations Task Force -- Declines -- 6. Meeting The Challenge Of Amphibian Declines With An Interdisciplinary Research Program -- 7. Biology Of Amphibian Declines -- 8. Declines Of Eastern North American Woodland Salamanders (Plethodon) -- 9. Decline Of Northern Cricket Frogs (Acris Crepitans) -- 10. Overwintering In Northern Cricket Frogs (Acris Crepitans) -- Causes -- 11. Repercussions Of Global Change -- 12. Lessons From Europe -- 13. Risk Factors And Declines In Northern Cricket Frogs (Acris Crepitans) -- 14. Ultraviolet Radiation -- 15. Xenobiotics -- 16. Variation In Pesticide Tolerance -- 17. Lucké Renal Adenocarcinoma -- 18. Malformed Frogs In Minnesota: History And Interspecific Differences -- 19. Parasites Of North American Frogs -- 20. Parasite Infection And Limb Malformations: A Growing Problem In Amphibian Conservation -- 21. Pine Silviculture -- 22. Commercial Trade -- Conservation -- 23. Houston Toads And Texas Politics -- 24. Amphibian Conservation Needs -- 25. Amphibian Population Cycles And Long-Term Data Sets -- 26. Landscape Ecology -- 27. Conservation Of Texas Spring And Cave Salamanders (Eurycea) -- 28. Lessons From The Tropics -- 29. Taxonomy And Amphibian Declines -- 30. Conservation Systematics: The Bufo Boreas Species Group -- 31. Factors Limiting The Recovery Of Boreal Toads (Bufo B. Boreas) -- 32. Southwestern Desert Bufonids -- 33. Amphibian Ecotoxicology -- 34. Museum Collections -- 35. Critical Areas -- 36. Creating Habitat Reserves For Migratory Salamanders -- 37. Population Manipulations -- 38. Exotic Species -- 39. Protecting Amphibians While Restoring Fish Populations -- 40. Reflections Upon Amphibian Conservation -- Surveys And Monitoring -- 41. Distribution Of South Dakota Anurans -- 42. Nebraska's Declining Amphibians -- 43. Museum Collections Can Assess Population Trends -- 44. Monitoring Salamander Populations In Great Smoky Mountains National Park -- 45. North American Amphibian Monitoring Program (Naamp) -- 46. Evaluating Calling Surveys -- 47. Geographical Information Systems And Survey Designs -- 48. Impacts Of Forest Management On Amphibians -- 49. Monitoring Pigment Pattern Morphs Of Northern Leopard Frogs -- Education -- 50. The National Amphibian Conservation Center -- 51. A Thousand Friends Of Frogs: Its Origins -- A Perspective -- 52. Of Men And Deformed Frogs: A Journalist's Lament -- Part Two. Species Accounts -- Introduction -- Anura -- Ascaphidae -- Family Bufonidae -- Family Dendrobatidae -- Family Hylidae -- Family Leptodactylidae -- Family Microhylidae -- Family Pelobatidae -- Family Pipidae -- Family Ranidae -- Family Rhinophrynidae -- Caudata -- Family Ambystomatidae -- Family Amphiumidae -- Family Cryptobranchidae -- Family Dicamptodontidae -- Family Plethodontidae -- Family Proteidae -- Family Rhyacotritonidae -- Family Salamandridae -- Family Sirenidae -- Epilogue: Factors Implicated In Amphibian Population Declines In The United States -- Conclusion -- Literature Cited -- Index
Record Nr. UNINA-9910783318103321
Berkeley, : University of California Press, 2005
Materiale a stampa
Lo trovi qui: Univ. Federico II
Opac: Controlla la disponibilità qui
Biodiversity in the Global South : Research for a sustainable world / / Jean-François Agnèse, Olivier Dangles, Estienne Rodary
Biodiversity in the Global South : Research for a sustainable world / / Jean-François Agnèse, Olivier Dangles, Estienne Rodary
Autore Rodary Estienne
Pubbl/distr/stampa Marseille, : IRD Éditions, 2022
Descrizione fisica 1 online resource (72 p.)
Altri autori (Persone) VerdierValerie
AgnèseJean-François
DanglesOlivier
RodaryEstienne
Collana Focus
Soggetto topico Environmental Studies
Geography
biodiversity
conservation
deforestation
nutrition
climate change
global health
ecology
Afrique
Asie
Amérique latine
Soggetto non controllato biodiversity
conservation
deforestation
nutrition
climate change
global health
ecology
Afrique
Asie
Amérique latine
ISBN 2-7099-2899-X
Formato Materiale a stampa
Livello bibliografico Monografia
Lingua di pubblicazione eng
Record Nr. UNINA-9910597170903321
Rodary Estienne  
Marseille, : IRD Éditions, 2022
Materiale a stampa
Lo trovi qui: Univ. Federico II
Opac: Controlla la disponibilità qui
Diversity, Biogeography and Community Ecology of Ants
Diversity, Biogeography and Community Ecology of Ants
Autore Andersen Alan N
Pubbl/distr/stampa Basel, : MDPI - Multidisciplinary Digital Publishing Institute, 2022
Descrizione fisica 1 electronic resource (370 p.)
Soggetto topico Research & information: general
Soggetto non controllato ant diversity
cryptic species
morphospecies
species delimitation
sympatric association
endosymbiont
ant
vertical transmission
biogeography
ancestral state reconstruction
phylogeny
ants
community structure
physiology
interactions
temperature
behavioral interactions
coexistence
co-occurrence
competitive exclusion
dominance
Formicidae
scale
Dolichoderinae
species distribution models
climatic gradients
wet tropics
climate change
invasion ecology
invasive species
red imported fire ant
commensalism
gopher tortoise
diversity
conservation
burrow commensal
soil arthropods
pitfall
bait
turnover
food specialisation
stratification
sampling methods
hypogaeic
species richness
species occurrence
endemic species
distribution ranges
dispersal routes
centre of origin
refugium areas
antbird
army ant
biodiversity
biological indicator
deforestation
habitat fragmentation
myrmecophiles
mimicry
species interactions
tropics
biological invasions
species checklist
urban ecology
Formato Materiale a stampa
Livello bibliografico Monografia
Lingua di pubblicazione eng
Record Nr. UNINA-9910566471503321
Andersen Alan N  
Basel, : MDPI - Multidisciplinary Digital Publishing Institute, 2022
Materiale a stampa
Lo trovi qui: Univ. Federico II
Opac: Controlla la disponibilità qui
Education, Communication and Decision Making on Renewable and Sustainable Energy
Education, Communication and Decision Making on Renewable and Sustainable Energy
Autore Ioannou Konstantinos
Pubbl/distr/stampa Basel, Switzerland, : MDPI - Multidisciplinary Digital Publishing Institute, 2020
Descrizione fisica 1 electronic resource (194 p.)
Soggetto topico Research & information: general
Environmental economics
Soggetto non controllato renewable energy
governance
community energy
citizens’ energy companies
actor plurality
acceptance
energy transition
auction scheme
Germany
Building Integrated Photovoltaic (BIPV)
barriers
sustainability
multi-functionality
proposal
educative-communication approach
sustainable agriculture
negative externalities
GHG emissions
NARDL model
Renewable Energy Enterprises
Internet
benchmark
education for sustainable development
environmental protection
curriculum
teacher
renewable resources
natural gas
energy market
customer satisfaction
industrial customers
multicriteria analysis
Renewable energy sources
energy poverty
citizen attitudes
Thessaloniki
marine renewable energy
co-existence
co-location
Dempster Shafer Analytic Hierarchy Process
multi-criteria analysis
environmental Kuznets curve
deforestation
ARDL with bounds test
willingness-to-invest
energy investments
renewable energy sources (RES)
perceptions
attitudes
department of forestry
environmental science
university students
decision-making
education
communication
investments
policy
RES
Formato Materiale a stampa
Livello bibliografico Monografia
Lingua di pubblicazione eng
Record Nr. UNINA-9910557441303321
Ioannou Konstantinos  
Basel, Switzerland, : MDPI - Multidisciplinary Digital Publishing Institute, 2020
Materiale a stampa
Lo trovi qui: Univ. Federico II
Opac: Controlla la disponibilità qui
Fit-for-Purpose Land Administration Fit-for-Purpose Land Administration- Providing Secure Land Rights at Scale. Volume 1: Conceptual Innovations
Fit-for-Purpose Land Administration Fit-for-Purpose Land Administration- Providing Secure Land Rights at Scale. Volume 1: Conceptual Innovations
Autore Enemark Stig
Pubbl/distr/stampa Basel, Switzerland, : MDPI - Multidisciplinary Digital Publishing Institute, 2021
Descrizione fisica 1 electronic resource (296 p.)
Soggetto topico Research & information: general
Soggetto non controllato complete cadastre
legal element
fixing boundary
eligible landowner
agreement
boundary marker
fit-for-purpose land administration (FFP LA)
violent conflict
United Nations
extra-legal
transitional justice
peace building
land governance
power relations
securing land rights
land registration
development impacts
fit-for-purpose land administration
land administration
decentralization
India
fit-for-purpose
institutions
governance
politics
Amazon
deforestation
Fit-For-Purpose land administration
participatory mapping
indigenous land conflict
Cumaribo
Colombia
community-based land adjudication
components of adjudication
land tenure
land rights
good practices
updating land records
systematic land registration
unconventional approach
case study
Benin
cadaster
land administration domain model
LADM
cadastre
FFPLA
customary tenure
land inventory
land management
mobile-based applications
pro-poor
land surveying
tenure security
land rights and tenure
fit-for-purpose approach
human rights
design science research
design thinking
fit for purpose
spatial data quality
spatial data quality assurance
maintenance
update
upgrade
upkeep
renewal
data quality
spatial framework
STDM
technology
UAV
feature extraction
rapid urbanization
climate change
pandemic
urban resilience
spatial
legal
and institutional frameworks
land tenure security
pro-poor land recordation
land governance reform
cost effectiveness
innovative technology
case studies
Uganda
customary land tenure
land recordation tools
semantic technologies
land information system
fit-for-purpose land management
aerial and street level imagery
machine learning
integrated land programs
land policy
pilot study
informal settlements
urban development
Brazil
community-based crowdsourcing
SiGIT
Ecuador
land and resources rights
public-private partnerships
corporate social responsibility
poverty reduction
business driven solutions
social enterprises
Formato Materiale a stampa
Livello bibliografico Monografia
Lingua di pubblicazione eng
Altri titoli varianti Fit-for-Purpose Land Administration- Providing Secure Land Rights at Scale. Volume 1
Fit-for-Purpose Land Administration Fit-for-Purpose Land Administration- Providing Secure Land Rights at Scale. Volume 1
Record Nr. UNINA-9910557521203321
Enemark Stig  
Basel, Switzerland, : MDPI - Multidisciplinary Digital Publishing Institute, 2021
Materiale a stampa
Lo trovi qui: Univ. Federico II
Opac: Controlla la disponibilità qui
Fit-for-Purpose Land Administration- Providing Secure Land Rights at Scale. Volume 2: Country Implementation
Fit-for-Purpose Land Administration- Providing Secure Land Rights at Scale. Volume 2: Country Implementation
Autore Enemark Stig
Pubbl/distr/stampa Basel, Switzerland, : MDPI - Multidisciplinary Digital Publishing Institute, 2021
Descrizione fisica 1 electronic resource (268 p.)
Soggetto topico Research & information: general
Soggetto non controllato complete cadastre
legal element
fixing boundary
eligible landowner
agreement
boundary marker
fit-for-purpose land administration (FFP LA)
violent conflict
United Nations
extra-legal
transitional justice
peace building
land governance
power relations
securing land rights
land registration
development impacts
fit-for-purpose land administration
land administration
decentralization
India
fit-for-purpose
institutions
governance
politics
Amazon
deforestation
Fit-For-Purpose land administration
participatory mapping
indigenous land conflict
Cumaribo
Colombia
community-based land adjudication
components of adjudication
land tenure
land rights
good practices
updating land records
systematic land registration
unconventional approach
case study
Benin
cadaster
land administration domain model
LADM
cadastre
FFPLA
customary tenure
land inventory
land management
mobile-based applications
pro-poor
land surveying
tenure security
land rights and tenure
fit-for-purpose approach
human rights
design science research
design thinking
fit for purpose
spatial data quality
spatial data quality assurance
maintenance
update
upgrade
upkeep
renewal
data quality
spatial framework
STDM
technology
UAV
feature extraction
rapid urbanization
climate change
pandemic
urban resilience
spatial
legal
and institutional frameworks
land tenure security
pro-poor land recordation
land governance reform
cost effectiveness
innovative technology
case studies
Uganda
customary land tenure
land recordation tools
semantic technologies
land information system
fit-for-purpose land management
aerial and street level imagery
machine learning
integrated land programs
land policy
pilot study
informal settlements
urban development
Brazil
community-based crowdsourcing
SiGIT
Ecuador
land and resources rights
public-private partnerships
corporate social responsibility
poverty reduction
business driven solutions
social enterprises
Formato Materiale a stampa
Livello bibliografico Monografia
Lingua di pubblicazione eng
Altri titoli varianti Fit-for-Purpose Land Administration- Providing Secure Land Rights at Scale. Volume 2
Record Nr. UNINA-9910557600603321
Enemark Stig  
Basel, Switzerland, : MDPI - Multidisciplinary Digital Publishing Institute, 2021
Materiale a stampa
Lo trovi qui: Univ. Federico II
Opac: Controlla la disponibilità qui