Experimental evaluation of airborne pollutants using sensor-based monitoring

Fuente: PANGAEA

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Bibliographic Details
Main Authors:	Houben, Timo, Remmler, Paul, Romanjuta, Alex, Vosgerau, Ema, Dietrich, Peter, Trabert, Thomas
Format:	Dataset Open Access
Language:	en
Published:	PANGAEA 2025
Subjects:	2024_Experiment_Bush; 2024_Experiment_Car; 2024_Experiment_Cigarette; 2024_Experiment_DP; 2024_Experiment_Dust; 2024_Experiment_Eppi1-22; 2024_Experiment_Eppi2-23; 2024_Experiment_Eppi3-21; 2024_Experiment_Eppi4-22; 2024_Experiment_FAN1; 2024_Experiment_FAN2; 2024_Experiment_Grill; 2024_Experiment_Sand; 2024_Experiment_Soot; 2024_Experiment_Truck; 2024_Experiment_Water; 2024_Experiment_Wood; activation_of_the_fan; air pollutants; air quality measurements; burning_small_pieces_of_wood; Carbon monoxide; charcoal_grill; cigarette_smoking_experiment; CO; Comment; DATE/TIME; eppi_no._1_22_mg; eppi_no._2_23_mg; eppi_no._3_21_mg; eppi_no._4_22_mg; Event label; Field experiment; Humidity, relative; IMB; Immission Measurement Box, Bosch, IMB Standard; implementation_of_a_car_diesel; implementation_of_a_truck_diesel; implementation_of_the_fan; implementation_ of_the_large_"Direct_Push"_machine; Irradiance, downward; Leipzig, Saxony, Germany; Nitrogen dioxide; NO2; O3; Ozone; Particulate matter, < 10 µm; Particulate matter, < 2.5 µm; PM10; PM2.5; Precipitation, sum; Pressure, atmospheric; rain_imitation_with_water_hose; restart_of_the_machine_soot_cloud; Sensor array; Sensor calibration; shaking_of_the_picked_flower_bush; Temperature, air; throwing_tests_with_sand; throwing_tests_with_sand_and_building_dust; Ultraviolet index; Weather station, Bresser GmbH, WLAN Colour Weather Station 9080600; Wind direction; Wind speed; Wind speed, gust
Online Access:	Acceder al recurso
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if (filemtime($filename) + $maxlifetime < time()) { unlink($filename); $count++; } } return $count; } /** * A function that is called internally when session data is to be saved. * * @param string $sessId The current session ID * @param string $data The session data to write * * @return bool */ protected function saveSession($sessId, $data): bool { $sessFile = $this->path . '/sess_' . $sessId; if ($handle = fopen($sessFile, 'w')) { $return = false; // Lock the file for exclusive access to avoid issues with multiple // processes writing session simultaneously: if (flock($handle, LOCK_EX)) { $return = fwrite($handle, $data); // Make sure that there's no trailing data by truncating the file to // the correct length: ftruncate($handle, strlen($data)); fflush($handle); flock($handle, LOCK_UN); } fclose($handle); if ($return !== false) { return true; } } // If we got this far, something went wrong with the file output... // It is tempting to throw an exception here, but this code is called // outside of the context of exception handling, so all we can do is // echo a message.

// Anecdotal testing Today and Yesterday seems to indicate destroy() // is called by the garbage collector and everything is good. // Something to keep in mind though. return 0; } /** * Write function that is called when session data is to be saved. * * @param string $sessId The current session ID * @param string $data The session data to write * * @return bool */ public function write($sessId, $data): bool { if ($this->writesDisabled) { return true; } return $this->saveSession($sessId, $data); } /** * A function that is called internally when session data is to be saved. * * @param string $sessId The current session ID * @param string $data The session data to write * * @return bool */ abstract protected function saveSession($sessId, $data): bool; }

* * @return void */ public function writeClose() { // The assumption is that we're using PHP's ext/session. // session_write_close() will actually overwrite $_SESSION with an // empty array on completion -- which leads to a mismatch between what // is in the storage object and $_SESSION. To get around this, we // temporarily reset $_SESSION to an array, and then re-link it to // the storage object. // // Additionally, while you _can_ write to $_SESSION following a // session_write_close() operation, no changes made to it will be // flushed to the session handler. As such, we now mark the storage // object isImmutable. $storage = $this->getStorage(); if (! $storage->isImmutable()) { $_SESSION = $storage->toArray(true); session_write_close(); $storage->fromArray($_SESSION); $storage->markImmutable(); } } /** * Attempt to set the session name * * If the session has already been started, or if the name provided fails * validation, an exception will be raised. * * @param string $name * @return SessionManager * @throws Exception\InvalidArgumentException */ public function setName($name) { if ($this->sessionExists()) { throw new Exception\InvalidArgumentException( 'Cannot set session name after a session has already started'

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