@prefix dcterms: .
@prefix np: .
@prefix npx: .
@prefix ntemplate: .
@prefix prov: .
@prefix rdfs: .
@prefix schema: .
@prefix sub: .
@prefix this: .
@prefix xsd: .
sub:Head {
this: a np:Nanopublication;
np:hasAssertion sub:assertion;
np:hasProvenance sub:provenance;
np:hasPublicationInfo sub:pubinfo .
}
sub:assertion {
sub:summary a schema:CreativeWork;
dcterms:creator ;
rdfs:comment """One satellite, two measurements, two very different results
How do scientists know a tool really works? They test it again, carefully — in a new place, with different equipment. That re-testing is called replication, and it is how science checks itself.
The question: A satellite called Sentinel-2 takes pictures of Earth from space. Can it measure the quality of water in an estuary (where a river meets the sea) — using only free software that anyone can download?
The test: The team measured two things from space and checked them against real measurements made in the water: how cloudy or muddy the water was, and how much tiny green algae it contained. If the satellite's numbers matched the real ones, the method works.
The result: For muddiness, the satellite got it right. For algae, it got it wrong — in this murky water it simply could not measure the algae reliably. Same satellite, same water, but one answer you can trust and one you cannot.
The big lesson: a tool can be excellent at one job and unreliable at another. Never assume — test each use on its own. That is exactly what replication is for.""";
schema:about ;
schema:audience .
}
sub:provenance {
sub:assertion prov:wasAttributedTo ;
prov:wasDerivedFrom .
}
sub:pubinfo {
this: dcterms:creator ;
dcterms:license ;
dcterms:title "Plain-language summary of the Westerschelde synthesis (For schools)";
prov:generatedAtTime "2026-07-26T14:40:00.833090+00:00"^^xsd:dateTime;
ntemplate:wasCreatedFromTemplate .
sub:sig npx:hasAlgorithm "RSA";
npx:hasPublicKey "MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAyuQ7Hi/zQ7hDZtMtLWK1JKU83Kgo8NqC+b8sxD5IoiekPctXVA8iM0zD/9pcp1txGXjX/fUj5HRUkOn4RVHP3fFa/3irQYpZFQ5fHRj8MQ7kJ6AEd1oggfajDevZGz63hj6Vigo+BNYBXqhcbWVAfLfbzQPAegce9zH6n9vTqKYMrwrSxPQdhoAcoaKOqY8gRiJgzekeEr+iEqa63X1HwWtYDs7X25a9xWbgaDSsRjzZGVUVOn1vYdSfWAaIw+EB9CiJfKm1zuXcur5PDziMW1pnZG6/NQtrA7AM3gLnoSoU3glkm5UhksGNqu2SV+j8oZLg7v6C5/sg2f6LIJMeFwIDAQAB";
npx:hasSignature "QpW5Nv98TJ2ELP1JBhZMJT/Q5t8HEWU2TVmOnF4QlqbEnS9bA3HQ34Hg6NSRyP/T7JmrTMTQ+7FyWUbAL4yZErzEsa+o2WJgyw/TSHEr8XEmOHK4h2duUoQNAXTKZEcTi1taQymCVRSAljsrm6eoH1iCG5cDqOCMukDORqH+sF4G/ls2U9ySBzfJ/9VN4suEHg/wBsydHrGWuAc9ZLQzFBSDh/CzCEDoeYEJw9/0t70XConAwn/WZmS+MG/K0RpGrBuVmXFNqDWb09OacVOkb2juHwlDtmX9krHRTj6gr+cuSkPWM0yIorg0ykvGuRPNVGOiJSgOtFIYVAq2cKf10Q==";
npx:hasSignatureTarget this:;
npx:signedBy .
}